{"id":42741,"date":"2025-06-26T15:58:16","date_gmt":"2025-06-26T06:58:16","guid":{"rendered":"https:\/\/jouhou.main.jp\/?p=42741"},"modified":"2026-01-24T15:58:56","modified_gmt":"2026-01-24T06:58:56","slug":"centos-ebadf-9-%e5%af%be%e7%ad%96%ef%bc%9a%e7%84%a1%e5%8a%b9%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%83%87%e3%82%a3%e3%82%b9%e3%82%af%e3%83%aa%e3%83%97%e3%82%bf%e3%82%a8%e3%83%a9%e3%83%bc%e3%80%8cbad","status":"publish","type":"post","link":"https:\/\/jouhou.main.jp\/?p=42741","title":{"rendered":"CentOS EBADF (9) \u5bfe\u7b56\uff1a\u7121\u52b9\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u30a8\u30e9\u30fc\u300cBad file descriptor\u300d\u767a\u751f\u6642\u306e\u518d\u8a2d\u5b9a\u5bfe\u7b56\u7de8"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"42741\" class=\"elementor elementor-42741\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-42431e3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"42431e3\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4487d02\" data-id=\"4487d02\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8989f11 elementor-widget elementor-widget-html\" data-id=\"8989f11\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<section style=\"max-width:100%; box-sizing:border-box; overflow:visible; padding:14px; border:1px solid #e5e7eb; border-radius:3px; background:#ffffff;\"> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; border:1px solid #e5e7eb; border-radius:3px; padding:14px; background:#ffffff;\"> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; display:flex; align-items:center; gap:10px; flex-wrap:wrap;\"> <span style=\"max-width:100%; box-sizing:border-box; overflow:visible; overflow-wrap:anywhere; display:inline-block; padding:4px 10px; border-radius:3px; background:#111827; color:#ffffff; font-size:12px; font-weight:700;\">\u6700\u77ed\u30c1\u30a7\u30c3\u30af<\/span> <h2 style=\"overflow-wrap:anywhere; max-width:100%; margin:0; font-size:18px; line-height:1.35; color:#111827;\">CentOS EBADF\uff08Bad file descriptor\uff09\u3092\u6700\u77ed\u3067\u5207\u308a\u5206\u3051\u3066\u3001\u6700\u5c0f\u5909\u66f4\u3067\u53ce\u675f<\/h2> <\/div> <p style=\"overflow-wrap:anywhere; max-width:100%; margin:8px 0 0 0; color:#374151; font-size:13px; line-height:1.6;\">\u8aad\u307f\u66f8\u304d\u3084\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u304c\u5931\u6557\u3057\u305f\u3068\u304d\u306f\u3001\u307e\u305a\u300c\u8ab0\u304c\u300d\u300c\u3069\u3053\u307e\u3067\u5230\u9054\u3057\u305f\u304b\u300d\u3092\u62bc\u3055\u3048\u308b\u3068\u3001\u89e6\u308b\u7bc4\u56f2\u304c\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <\/div> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; border:1px solid #e5e7eb; border-radius:3px; padding:14px; background:#ffffff;\"> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:8px;\"> <span style=\"max-width:100%; box-sizing:border-box; overflow:visible; overflow-wrap:anywhere; display:inline-block; padding:2px 8px; border-radius:3px; background:#dc2626; color:#ffffff; font-weight:800;\">\uff11<\/span> <h3 style=\"overflow-wrap:anywhere; max-width:100%; margin:0; font-size:16px; color:#111827;\">30\u79d2\u3067\u539f\u56e0\u3092\u7d5e\u308b<\/h3> <\/div> <p style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 10px 0; color:#374151; font-size:13px; line-height:1.6;\">\u5b9f\u884c\u30e6\u30fc\u30b6\u30fc\u3068\u30d1\u30b9\u89e3\u6c7a\u306e\u5230\u9054\u70b9\u3092\u5148\u306b\u898b\u308b\u3068\u3001\u300c\u6a29\u9650\u300d\u306a\u306e\u304b\u300cFD\u306e\u6271\u3044\u300d\u306a\u306e\u304b\u304c\u65e9\u304f\u5206\u304b\u308c\u307e\u3059\u3002<\/p> <pre style=\"background:#111827; color:#ffffff; padding:12px; border-radius:3px; margin:0; white-space:pre-wrap; overflow-wrap:anywhere; word-break:break-word; max-width:100%; box-sizing:border-box;\">id namei -l \/path\/to\/target ls -ld \/path\/to \/path\/to\/target<\/pre> <\/div> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; border:1px solid #e5e7eb; border-radius:3px; padding:14px; background:#ffffff;\"> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:8px;\"> <span style=\"max-width:100%; box-sizing:border-box; overflow:visible; overflow-wrap:anywhere; display:inline-block; padding:2px 8px; border-radius:3px; background:#16a34a; color:#ffffff; font-weight:800;\">\uff12<\/span> <h3 style=\"overflow-wrap:anywhere; max-width:100%; margin:0; font-size:16px; color:#111827;\">\u75c7\u72b6\u5225\uff1a\u3044\u307e\u306e\u5931\u6557\u306b\u5408\u3046\u6700\u77ed\u30b3\u30de\u30f3\u30c9<\/h3> <\/div> <p style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 10px 0; color:#374151; font-size:13px; line-height:1.6;\">\u300c\u3069\u306e\u64cd\u4f5c\u3067EBADF\u306b\u306a\u3063\u305f\u304b\u300d\u3092\u56fa\u5b9a\u3057\u3066\u3001FD\u306e\u751f\u6210\u3068close\u306e\u6d41\u308c\u3060\u3051\u3092\u8ffd\u3046\u3068\u901f\u3044\u3067\u3059\u3002<\/p> <pre style=\"background:#111827; color:#ffffff; padding:12px; border-radius:3px; margin:0; white-space:pre-wrap; overflow-wrap:anywhere; word-break:break-word; max-width:100%; box-sizing:border-box;\"># \u60f3\u5b9aA\uff1a\u30b7\u30a7\u30eb\u306e\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\/\u30d1\u30a4\u30d7\u3067\u300cBad file descriptor\u300d bash -x .\/your_script.sh 2>&1 | head -n 80 ls -l \/proc\/$$\/fd\n\u60f3\u5b9aB\uff1a\u30b5\u30fc\u30d3\u30b9\/\u30a2\u30d7\u30ea\u304c read\/write \u3067EBADF\uff08FD\u751f\u6210\/close\/dup\u5468\u308a\uff09\n\npid=$(pidof your_process 2>\/dev\/null | awk '{print $1}')\nstrace -f -e trace=desc -p \"$pid\" 2>&1 | head -n 60\n\n\u60f3\u5b9aC\uff1a\u30d7\u30ed\u30bb\u30b9\u304c\u6301\u3064FD\u3092\u78ba\u8a8d\uff08\u5bfe\u8c61\u30d5\u30a1\u30a4\u30eb\/\u30bd\u30b1\u30c3\u30c8\u306e\u7279\u5b9a\uff09\n\nlsof -p \"$pid\" | head -n 60\nls -l \/proc\/\"$pid\"\/fd | head -n 40\n\n\u60f3\u5b9aD\uff1a\u5171\u6709\/NFS\/\u30b3\u30f3\u30c6\u30ca\u5883\u754c\u306e\u7591\u3044\uff08\u898b\u3048\u3066\u3044\u308b\u3082\u306e\u304c\u4e00\u81f4\u3057\u3066\u3044\u308b\u304b\uff09\n\nfindmnt -T \/path\/to\/target\nmount | grep -E \" nfs| fuse| overlay\" | head -n 20<\/pre>\n\n<\/div> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; border:1px solid #e5e7eb; border-radius:3px; padding:14px; background:#ffffff;\"> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:8px;\"> <span style=\"max-width:100%; box-sizing:border-box; overflow:visible; overflow-wrap:anywhere; display:inline-block; padding:2px 8px; border-radius:3px; background:#2563eb; color:#ffffff; font-weight:800;\">\uff13<\/span> <h3 style=\"overflow-wrap:anywhere; max-width:100%; margin:0; font-size:16px; color:#111827;\">\u76f4\u3059\u524d\u306b\uff1a\u5f71\u97ff\u7bc4\u56f2\u30921\u5206\u3067\u78ba\u8a8d\uff08\u3084\u308a\u904e\u304e\u9632\u6b62\uff09<\/h3> <\/div> <p style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 10px 0; color:#374151; font-size:13px; line-height:1.6;\">\u5909\u66f4\u3059\u308b\u524d\u306b\u300c\u5bfe\u8c61\u306f\u5358\u4f53\u304b\u300d\u300c\u4ed6\u30b5\u30fc\u30d3\u30b9\u3068\u5171\u6709\u304b\u300d\u300c\u4e0a\u9650\uff08nofile\uff09\u3084\u76e3\u67fb\u304c\u7d61\u3080\u304b\u300d\u3092\u78ba\u8a8d\u3057\u3066\u3001\u6700\u5c0f\u5909\u66f4\u306e\u7dda\u3060\u3051\u6b8b\u3057\u307e\u3059\u3002<\/p> <pre style=\"background:#111827; color:#ffffff; padding:12px; border-radius:3px; margin:0; white-space:pre-wrap; overflow-wrap:anywhere; word-break:break-word; max-width:100%; box-sizing:border-box;\"># \u5f71\u97ff\u3059\u308b\u5358\u4f4d\uff08\u30b5\u30fc\u30d3\u30b9\/\u30d7\u30ed\u30bb\u30b9\uff09 systemctl status your_service --no-pager journalctl -u your_service -n 80 --no-pager\nFD\u4e0a\u9650\u3068\u30b7\u30b9\u30c6\u30e0\u5074\u306e\u4e0a\u9650\uff08\u8a2d\u5b9a\u3092\u89e6\u308b\u524d\u306b\u628a\u63e1\uff09\n\nulimit -n\ncat \/proc\/\"$pid\"\/limits | grep -i \"open files\"\nsysctl fs.file-max\n\n\u5171\u6709\u30fb\u5883\u754c\u306e\u78ba\u8a8d\uff08NFS\/overlay\/\u30b3\u30f3\u30c6\u30ca\uff09\n\nfindmnt -T \/path\/to\/target\nlsns | head -n 20<\/pre>\n\n<\/div> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; border:1px solid #fed7aa; border-radius:3px; padding:14px; background:#fff7ed;\"> <h3 style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 8px 0; font-size:16px; color:#7c2d12;\">\u5931\u6557\u3059\u308b\u3068\u3069\u3046\u306a\u308b\uff1f\uff08\u3084\u308a\u304c\u3061\u306a\u30df\u30b9\u3068\u8d77\u3053\u308a\u5f97\u308b\u7d50\u679c\uff09<\/h3> <ul style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin:0; padding-left:18px; color:#7c2d12; font-size:13px; line-height:1.7;\"> <li style=\"overflow-wrap:anywhere; max-width:100%;\">\u6a29\u9650\u3092\u5e83\u3052\u3059\u304e\u308b \u2192 \u60c5\u5831\u6f0f\u3048\u3044\/\u6539\u3056\u3093<\/li> <li style=\"overflow-wrap:anywhere; max-width:100%;\">\u6240\u6709\u8005\u3092\u5909\u3048\u3059\u304e\u308b \u2192 \u4e8c\u6b21\u969c\u5bb3\uff08\u505c\u6b62\u30fb\u30a8\u30e9\u30fc\u9023\u9396\uff09<\/li> <li style=\"overflow-wrap:anywhere; max-width:100%;\">ACL\/\u4fdd\u8b77\u8a2d\u5b9a\u3092\u7121\u9020\u4f5c\u306b\u5916\u3059 \u2192 \u76e3\u67fb\u6307\u6458\/\u518d\u767a\/\u8ffd\u8de1\u4e0d\u80fd<\/li> <li style=\"overflow-wrap:anywhere; max-width:100%;\">\u5171\u6709\/NFS\/\u30b3\u30f3\u30c6\u30ca\u5883\u754c\u306e\u898b\u843d\u3068\u3057 \u2192 \u5fa9\u65e7\u9577\u671f\u5316<\/li> <\/ul> <\/div> <div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; border:1px solid #e5e7eb; border-radius:3px; padding:14px; background:#ffffff;\"> <h3 style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 6px 0; font-size:16px; color:#111827;\">\u8ff7\u3063\u305f\u3089\uff1a\u7121\u6599\u3067\u76f8\u8ac7\u3067\u304d\u307e\u3059<\/h3> <p style=\"overflow-wrap:anywhere; max-width:100%; margin:0 0 10px 0; color:#374151; font-size:13px; line-height:1.6;\">\u5224\u65ad\u304c\u6b62\u307e\u308b\u3068\u3053\u308d\u3060\u3051\u5148\u306b\u57cb\u3081\u308b\u3068\u3001\u4f5c\u696d\u306e\u3084\u308a\u76f4\u3057\u304c\u6e1b\u308a\u307e\u3059\u3002\u8ff7\u3063\u305f\u3089<strong>\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240<\/strong>\u3078\u7121\u6599\u76f8\u8ac7\u3057\u3066\u3001\u6700\u5c0f\u5909\u66f4\u3067\u65e9\u304f\u53ce\u675f\u3078\u3002<\/p>\n<div style=\"max-width:100%; box-sizing:border-box; overflow:visible; padding:10px; border:1px solid #e5e7eb; border-radius:3px; background:#f9fafb;\">\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fb\u3069\u306e\u51e6\u7406\u3067FD\u304c\u7121\u52b9\u5316\u3057\u305f\u304b\u8ffd\u3048\u306a\u3044\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fbclose\u6f0f\u308c\u304b\u591a\u91cdclose\u304b\u5224\u65ad\u3067\u304d\u306a\u3044\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fbsystemd\u3084cron\u8d77\u56e0\u304b\u5207\u308a\u5206\u3051\u304c\u3067\u304d\u306a\u3044\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fbulimit nofile \u3084 limits \u8a2d\u5b9a\u3092\u89e6\u308b\u3079\u304d\u304b\u8ff7\u3063\u305f\u3089\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fbSELinux\u3084\u76e3\u67fb\u30ed\u30b0\u306e\u8aad\u307f\u65b9\u3067\u8ff7\u3063\u305f\u3089\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fb\u5171\u6709\u30b9\u30c8\u30ec\u30fc\u30b8\u3001\u30b3\u30f3\u30c6\u30ca\u3001\u672c\u756a\u30c7\u30fc\u30bf\u3001\u76e3\u67fb\u8981\u4ef6\u304c\u7d61\u3080\u5834\u5408\u306f\u3001\u7121\u7406\u306b\u6a29\u9650\u3092\u89e6\u308b\u524d\u306b\u76f8\u8ac7\u3059\u308b\u3068\u65e9\u304f\u53ce\u675f\u3057\u3084\u3059\u3044\u3067\u3059\u3002<\/div>\n  <div style=\"overflow-wrap:anywhere; max-width:100%; font-size:12px; color:#374151; line-height:1.7;\">\u30fbNFS\u3084overlay\u306e\u5883\u754c\u304c\u539f\u56e0\u304b\u78ba\u4fe1\u304c\u6301\u3066\u306a\u3044\u3002<\/div>\n<\/div>\n\n<div style=\"max-width:100%; box-sizing:border-box; overflow:visible; margin-top:12px; display:flex; flex-wrap:wrap; gap:10px;\">\n  <a href=\"https:\/\/jouhou.main.jp\/?page_id=26983\" style=\"overflow-wrap:anywhere; max-width:100%; display:inline-block; text-decoration:none; background:#2563eb; color:#ffffff; padding:10px 12px; border-radius:3px; font-size:13px; font-weight:700; box-sizing:border-box;\">\u7121\u6599\u76f8\u8ac7\u30d5\u30a9\u30fc\u30e0<\/a>\n  <a href=\"tel:0120838831\" style=\"overflow-wrap:anywhere; max-width:100%; display:inline-block; text-decoration:none; background:#1e3a8a; color:#ffffff; padding:10px 12px; border-radius:3px; font-size:13px; font-weight:700; box-sizing:border-box;\">\u96fb\u8a71\u3067\u76f8\u8ac7\uff080120-838-831\uff09<\/a>\n  <a href=\"tel:0434224240\" style=\"overflow-wrap:anywhere; max-width:100%; display:inline-block; text-decoration:none; background:#0b1f4b; color:#ffffff; padding:10px 12px; border-radius:3px; font-size:13px; font-weight:700; box-sizing:border-box;\">\u6280\u8853\u8005\u76f4\u901a\uff08043-422-4240\uff09<\/a>\n<\/div>\n\n<p style=\"overflow-wrap:anywhere; max-width:100%; margin:12px 0 0 0; font-size:1.5em; color:#111827; line-height:1.35;\">\u6839\u672c\u7684\u306a\u539f\u56e0\u306e\u7a76\u660e\u3068BCP\u5bfe\u7b56\u306f\u4ee5\u4e0b\u672c\u6587\u3078\u3002<\/p>\n\n<\/div> <\/section>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e83a653 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e83a653\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-72c4634\" data-id=\"72c4634\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ab28dc6 elementor-widget elementor-widget-html\" data-id=\"ab28dc6\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div style=\"margin:0; padding:30pt; background-color:#EEEEEE;\"> <p style=\"margin:0 0 8px 0; font-size:1.2em;\"><strong>\u3082\u304f\u3058<\/strong><\/p> <ul style=\"list-style-type:none; padding-left:0; margin:0;\"> <li style=\"margin:40px 0;\"><a href=\"#sec01\">\u3068\u308a\u3042\u3048\u305a\u518d\u8d77\u52d5\u3067\u6d41\u3057\u3066\u304d\u305fEBADF\u3068\u3061\u3083\u3093\u3068\u5411\u304d\u5408\u3046<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec02\">\u300cBad file descriptor\u300d\u304c\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u306e\u3069\u3093\u306a\u8b66\u544a\u306a\u306e\u304b\u3092\u8a00\u8a9e\u5316\u3059\u308b<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec03\">\u4e8c\u91cdclose\u30fb\u5bff\u547d\u5207\u308cFD\u30fb\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u3067\u8d77\u3053\u308b\u5178\u578b\u7684\u306a\u7834\u7dbb\u30d1\u30bf\u30fc\u30f3<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec04\">strace \/ lsof \/ \/proc\u3067EBADF\u767a\u751f\u307e\u3067\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u518d\u73fe\u3057\u3066\u8ffd\u3044\u8fbc\u3080<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec05\">CentOS\u306e\u30b5\u30fc\u30d3\u30b9\u7ba1\u7406\uff08systemd\uff09\u3068\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u95a2\u4fc2\u3092\u6574\u7406\u3059\u308b<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec06\">\u30ed\u30b0\u30fb\u30bd\u30b1\u30c3\u30c8\u30fb\u30d1\u30a4\u30d7\u3092\u5b89\u5168\u306b\u300c\u958b\u304d\u76f4\u3059\u300d\u305f\u3081\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec07\">\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u8a2d\u5b9a\u5909\u66f4\u6642\u306bEBADF\u3092\u51fa\u3055\u306a\u3044\u305f\u3081\u306e\u904b\u7528\u8a2d\u8a08<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec08\">\u300c\u843d\u3068\u3055\u305a\u7acb\u3066\u76f4\u3059\u300d\u305f\u3081\u306e\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u3068\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u306e\u66f8\u304d\u65b9<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec09\">\u518d\u8d77\u52d5\u524d\u63d0\u306e\u904b\u7528\u304b\u3089\u300cEBADF\u3092\u30c8\u30ea\u30ac\u30fc\u306b\u3057\u305f\u81ea\u5df1\u4fee\u5fa9\u300d\u3078\u306e\u8003\u3048\u65b9<\/a><\/li> <li style=\"margin:40px 0;\"><a href=\"#sec10\">EBADF\u3092\u6016\u304c\u3089\u306a\u3044\u30c1\u30fc\u30e0\u306b\u306a\u308b\u305f\u3081\u306b\u4eca\u65e5\u304b\u3089\u898b\u76f4\u305b\u308b\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a><\/li> <\/ul> <\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8d005a6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8d005a6\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-47acf33\" data-id=\"47acf33\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8b33a88 elementor-widget elementor-widget-html\" data-id=\"8b33a88\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<p><strong>\u3010\u6ce8\u610f\u3011\u672c\u8a18\u4e8b\u306e\u5185\u5bb9\u306f\u3001CentOS \u3092\u542b\u3080\u4e00\u822c\u7684\u306a Linux \u74a6\u5883\u3067\u767a\u751f\u3059\u308b EBADF\uff08Bad file descriptor\uff09\u30a8\u30e9\u30fc\u306b\u3064\u3044\u3066\u3001\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u6280\u8853\u4ed5\u69d8\u3084\u4e00\u822c\u7684\u306a\u904b\u7528\u30ca\u30ec\u30c3\u30b8\u3092\u6574\u7406\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u5b9f\u969b\u306e\u30b7\u30b9\u30c6\u30e0\u69cb\u6210\u30fb\u5951\u7d04\u6761\u4ef6\u30fb\u793e\u5185\u898f\u7a0b\u306a\u3069\u306b\u3088\u3063\u3066\u6700\u9069\u306a\u5bfe\u5fdc\u306f\u7570\u306a\u308a\u307e\u3059\u3002\u91cd\u8981\u306a\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u30fb\u533b\u7642\u6a5f\u95a2\u30fb\u516c\u5171\u30a4\u30f3\u30d5\u30e9\u306a\u3069\u306e\u74b0\u5883\u3067\u306f\u3001\u5fc5\u305a\u793e\u5185\u306e\u8cac\u4efb\u8005\u3084\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\u3001\u306e\u500b\u5225\u8a3a\u65ad\u3092\u8e0f\u307e\u3048\u3066\u5bfe\u5fdc\u65b9\u91dd\u3092\u6c7a\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/strong><\/p>\n\n\n<a id=\"sec01\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u3068\u308a\u3042\u3048\u305a\u518d\u8d77\u52d5\u3067\u6d41\u3057\u3066\u304d\u305fEBADF\u3068\u3061\u3083\u3093\u3068\u5411\u304d\u5408\u3046<\/h2> <p>CentOS \u3092\u904b\u7528\u3057\u3066\u3044\u308b\u3068\u3001\u30ed\u30b0\u306b\u307d\u3064\u307d\u3064\u3068\u73fe\u308c\u308b <code>EBADF (Bad file descriptor)<\/code>\u3002\u591a\u304f\u306e\u73fe\u5834\u3067\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u518d\u8d77\u52d5\u3057\u305f\u308a\u3001\u6700\u60aa\u30b5\u30fc\u30d0\u30fc\u3054\u3068\u518d\u8d77\u52d5\u3057\u305f\u308a\u3057\u3066\u300c\u3068\u308a\u3042\u3048\u305a\u75c7\u72b6\u306f\u6d88\u3048\u305f\u304b\u3089\u826f\u3057\u300d\u3068\u6271\u3063\u3066\u304d\u305f\u30b1\u30fc\u30b9\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p> <p>\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u5fc3\u306e\u4e2d\u3067\u306f\u3001\u3053\u3093\u306a\u72ec\u308a\u8a00\u304c\u805e\u3053\u3048\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p> <ul> <li>\u300c\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u304c\u5909\u306b\u306a\u308b\u306a\u3093\u3066\u3001\u666e\u901a\u306f\u3042\u308a\u3048\u306a\u3044\u306f\u305a\u306a\u3093\u3060\u3051\u3069\u306a\u2026\u300d<\/li> <li>\u300c\u305f\u3076\u3093\u3069\u3053\u304b\u3067\u4e8c\u91cd close \u3057\u3066\u308b\u3093\u3060\u308d\u3046\u3051\u3069\u3001\u6398\u308b\u3068\u30ad\u30ea\u304c\u306a\u3055\u305d\u3046\u300d<\/li> <li>\u300c\u591c\u9593\u969c\u5bb3\u3067\u547c\u3073\u51fa\u3055\u308c\u308b\u304f\u3089\u3044\u306a\u3089\u3001\u5b9a\u671f\u518d\u8d77\u52d5\u3067\u201c\u306a\u3093\u3068\u306a\u304f\u5b89\u5b9a\u201d\u3055\u305b\u3066\u304a\u304d\u305f\u3044\u300d<\/li> <\/ul> <p>\u3053\u306e\u611f\u899a\u81ea\u4f53\u306f\u3001\u3068\u3066\u3082\u81ea\u7136\u3067\u3059\u3002\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u306f\u6b62\u3081\u3089\u308c\u307e\u305b\u3093\u3057\u3001\u300c\u6839\u672c\u539f\u56e0\u306e\u7a76\u660e\u300d\u3088\u308a\u3082\u300c\u4eca\u52d5\u304b\u3059\u3053\u3068\u300d\u304c\u512a\u5148\u3055\u308c\u308b\u5834\u9762\u306f\u78ba\u304b\u306b\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3057 EBADF \u304c\u51fa\u3066\u3044\u308b\u3068\u3044\u3046\u4e8b\u5b9f\u306f\u3001\u300c\u3044\u307e\u306f\u305f\u307e\u305f\u307e\u52d5\u3044\u3066\u3044\u308b\u304c\u3001\u672c\u6765\u60f3\u5b9a\u3057\u3066\u3044\u306a\u3044\u30d1\u30b9\u3067 I\/O \u304c\u6d41\u308c\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u3001\u304b\u306a\u308a\u5f37\u3044\u30b7\u30b0\u30ca\u30eb\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p> <p>Linux \u30ab\u30fc\u30cd\u30eb\u3084 glibc \u306e\u6319\u52d5\u306b\u57fa\u3065\u304f\u3068\u3001<code>EBADF<\/code> \u306f\u304a\u304a\u3056\u3063\u3071\u306b\u8a00\u3048\u3070\u300c\u305d\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u756a\u53f7\u306f\u3001\u4eca\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3068\u3063\u3066\u6709\u52b9\u3067\u306f\u306a\u3044\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\u8a00\u3044\u63db\u3048\u308c\u3070\u3001\u30d7\u30ed\u30bb\u30b9\u5185\u90e8\u306e\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u30ed\u30b8\u30c3\u30af\u3068\u30ab\u30fc\u30cd\u30eb\u5074\u306e\u73fe\u5b9f\u304c\u305a\u308c\u3066\u3044\u308b\u72b6\u614b\u3067\u3042\u308a\u3001\u30e1\u30e2\u30ea\u7834\u58ca\u30fb\u30cf\u30f3\u30c9\u30eb\u30ea\u30fc\u30af\u30fb\u8aa4\u3063\u305f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u306a\u3069\u3001\u3088\u308a\u91cd\u3044\u30d0\u30b0\u306e\u8868\u9762\u75c7\u72b6\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u518d\u8d77\u52d5\u3067\u4e00\u6642\u7684\u306b\u75c7\u72b6\u304c\u6d88\u3048\u3066\u3057\u307e\u3046\u3068\u3001\u300c\u3084\u3063\u3071\u308a OS \u5074\u306e\u4e0d\u6a5f\u5acc\u3060\u3063\u305f\u306e\u304b\u306a\u300d\u3068\u7247\u4ed8\u3051\u305f\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u5b9f\u969b\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4f0f\u7dda\u304c\u5f35\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p> <ul> <li>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u8a2d\u5b9a\u5909\u66f4\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e\u307f EBADF \u304c\u51fa\u308b<\/li> <li>\u8907\u6570\u30d7\u30ed\u30bb\u30b9\u30fb\u8907\u6570\u30b9\u30ec\u30c3\u30c9\u3067\u540c\u3058 FD \u3092\u5171\u6709\u3057\u3066\u3044\u308b<\/li> <li>systemd \u306e\u30b5\u30fc\u30d3\u30b9\u5b9a\u7fa9\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306e FD \u53d6\u308a\u6271\u3044\u306b\u30ba\u30ec\u304c\u3042\u308b<\/li> <li>\u672c\u756a\u74b0\u5883\u3060\u3051 <code>LimitNOFILE<\/code> \u3084 ulimit \u304c\u7570\u306a\u308a\u3001\u30c6\u30b9\u30c8\u3067\u306f\u518d\u73fe\u3057\u306a\u3044<\/li> <\/ul> <p>\u3053\u3046\u3044\u3063\u305f\u4f0f\u7dda\u3092\u653e\u7f6e\u3057\u305f\u307e\u307e\u300c\u518d\u8d77\u52d5\u3067\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u300d\u904b\u7528\u3092\u7d9a\u3051\u308b\u3068\u3001\u3044\u3064\u304b\u5225\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u3088\u308a\u91cd\u5927\u306a\u5f62\uff08\u30c7\u30fc\u30bf\u640d\u5931\u3001\u30ed\u30b0\u6b20\u640d\u3001\u30cf\u30f3\u30b0\u306a\u3069\uff09\u3067\u8868\u9762\u5316\u3059\u308b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001CentOS \u3092\u4f8b\u306b\u3057\u306a\u304c\u3089\u3001<strong>EBADF \u3092\u300c\u518d\u8d77\u52d5\u3067\u6d41\u3059\u73fe\u8c61\u300d\u304b\u3089\u300c\u8a2d\u8a08\u3068\u904b\u7528\u3092\u898b\u76f4\u3059\u30c8\u30ea\u30ac\u30fc\u300d\u3078\u3068\u4f4d\u7f6e\u3065\u3051\u76f4\u3059<\/strong>\u3053\u3068\u3092\u30b4\u30fc\u30eb\u306b\u3057\u307e\u3059\u3002<\/p> <p>\u7b2c1\u7ae0\u3067\u306f\u3001\u3042\u3048\u3066\u611f\u60c5\u9762\u306e\u30e2\u30e4\u30e2\u30e4\u3092\u8a00\u8a9e\u5316\u3057\u307e\u3057\u305f\u3002\u6b21\u7ae0\u304b\u3089\u306f\u3001\u300c\u305d\u3082\u305d\u3082\u30ab\u30fc\u30cd\u30eb\u306f EBADF \u3067\u4f55\u3092\u4f1d\u3048\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u306e\u304b\u300d\u3092\u3001\u4ed5\u69d8\u30d9\u30fc\u30b9\u3067\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u3053\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u5f8c\u306e\u8abf\u67fb\u3084\u518d\u8a2d\u5b9a\u304c\u4e00\u672c\u306e\u7dda\u3067\u3064\u306a\u304c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p> \n\n<a id=\"sec02\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u300cBad file descriptor\u300d\u304c\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u306e\u3069\u3093\u306a\u8b66\u544a\u306a\u306e\u304b\u3092\u8a00\u8a9e\u5316\u3059\u308b<\/h2> <p>\u307e\u305a\u306f\u4e8b\u5b9f\u95a2\u4fc2\u3092\u6574\u7406\u3057\u307e\u3059\u3002Linux \u3092\u542b\u3080 POSIX \u7684\u306a OS \u3067\u306f\u3001\u591a\u304f\u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u304c\u6b21\u306e\u3088\u3046\u306a\u623b\u308a\u5024\u306e\u898f\u7d04\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p> <ul> <li>\u6210\u529f\u6642\uff1a0 \u4ee5\u4e0a\u306e\u5024\uff08\u8aad\u307f\u53d6\u3063\u305f\u30d0\u30a4\u30c8\u6570\u306a\u3069\uff09<\/li> <li>\u5931\u6557\u6642\uff1a<code>-1<\/code> \u3092\u8fd4\u3057\u3001<code>errno<\/code> \u306b\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a<\/li> <\/ul> <p><code>EBADF<\/code> \u306f\u3001\u305d\u306e <code>errno<\/code> \u306e\u4e00\u7a2e\u3067\u3042\u308a\u3001\u5178\u578b\u7684\u306b\u306f\u30d8\u30c3\u30c0 <code>&lt;errno.h&gt;<\/code> \u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u591a\u304f\u306e Linux \u74b0\u5883\u3067\u306f\u6570\u5024\u3068\u3057\u3066 9 \u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u306f\u540d\u524d\uff08<code>EBADF<\/code>\uff09\u3067\u6271\u3046\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p> <p>\u30de\u30cb\u30e5\u30a2\u30eb\u30da\u30fc\u30b8\uff08\u4f8b\uff1a<code>man 2 read<\/code> \u3084 <code>man 2 write<\/code>\uff09\u3092\u898b\u308b\u3068\u3001<code>read(2)<\/code> \/ <code>write(2)<\/code> \/ <code>close(2)<\/code> \/ <code>dup(2)<\/code> \u306a\u3069\u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u306b\u5bfe\u3057\u3066\u3001<code>EBADF<\/code> \u306e\u8aac\u660e\u306f\u6982\u306d\u6b21\u306e\u3088\u3046\u306b\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p> <ul> <li>\u6307\u5b9a\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u304c\u958b\u304b\u308c\u3066\u3044\u306a\u3044<\/li> <li>\u8981\u6c42\u3057\u305f\u64cd\u4f5c\u306b\u5bfe\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u30e2\u30fc\u30c9\u304c\u4e0d\u9069\u5207\uff08\u4f8b\uff1a\u8aad\u307f\u8fbc\u307f\u5c02\u7528 FD \u306b\u5bfe\u3059\u308b write\uff09<\/li> <\/ul> <p>\u3064\u307e\u308a\u3001<strong>\u30d7\u30ed\u30bb\u30b9\u5074\u304c\u300c\u6709\u52b9\u3067\u3042\u308b\u306f\u305a\u300d\u3068\u601d\u3044\u8fbc\u3093\u3067\u6e21\u3057\u305f FD \u304c\u3001\u30ab\u30fc\u30cd\u30eb\u5074\u304b\u3089\u898b\u308b\u3068\u300c\u3059\u3067\u306b\u9589\u3058\u3089\u308c\u3066\u3044\u308b\u300d\u304b\u300c\u305d\u3082\u305d\u3082\u305d\u3093\u306a FD \u306f\u77e5\u3089\u306a\u3044\u300d\u72b6\u614b<\/strong>\u3060\u3068\u304d\u306b EBADF \u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u3053\u306b\u306f\u660e\u78ba\u306b\u3001\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306e\u72b6\u614b\u30e2\u30c7\u30eb\u3068\u30ab\u30fc\u30cd\u30eb\u5074\u306e\u73fe\u5b9f\u304c\u98df\u3044\u9055\u3063\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p> <p>\u73fe\u5834\u3067\u3088\u304f\u805e\u304f\u672c\u97f3\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u3057\u3087\u3046\u3002<\/p> <p>\u300c\u3044\u3084\u3044\u3084\u3001\u305d\u3093\u306a\u306b FD \u3092\u89e6\u3063\u3066\u3044\u308b\u308f\u3051\u3058\u3083\u306a\u3044\u3057\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u4efb\u305b\u3066\u3044\u308b\u90e8\u5206\u3082\u591a\u3044\u304b\u3089\u3001\u6b63\u76f4\u3069\u3053\u3067\u9589\u3058\u305f\u304b\u306a\u3093\u3066\u8ffd\u3048\u306a\u3044\u3088\u300d<\/p> <p>\u3053\u306e\u611f\u899a\u3082\u3001\u3084\u306f\u308a\u81ea\u7136\u3067\u3059\u3002\u6700\u8fd1\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306b\u591a\u5c64\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u304f\u3001<code>close(2)<\/code> \u3092\u76f4\u63a5\u547c\u3093\u3067\u3044\u308b\u306e\u306f\u3054\u304f\u4e00\u90e8\u306e\u30b3\u30fc\u30c9\u306b\u904e\u304e\u307e\u305b\u3093\u3002<\/p> <ul> <li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\uff08\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\uff09<\/li> <li>\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3084 ORM\u3001HTTP \u30e9\u30a4\u30d6\u30e9\u30ea<\/li> <li>\u30e9\u30f3\u30bf\u30a4\u30e0\uff08\u4f8b\uff1aJVM\u3001Python \u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u3001Ruby VM \u306a\u3069\uff09<\/li> <li>\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\uff08glibc \u306a\u3069\uff09<\/li> <li>\u30ab\u30fc\u30cd\u30eb<\/li> <\/ul> <p>\u3069\u3053\u304b1\u304b\u6240\u3067\u3082\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u304c\u7834\u7dbb\u3059\u308b\u3068\u3001\u7d50\u679c\u3068\u3057\u3066\u6700\u4e0a\u4f4d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u300c\u610f\u56f3\u3057\u306a\u3044 EBADF\u300d\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b CentOS \u306e\u3088\u3046\u306a\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3084 systemd \u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3082\u542b\u3081\u305f\u300c\u7d44\u307f\u5408\u308f\u305b\u300d\u304c\u672c\u756a\u74b0\u5883\u3054\u3068\u306b\u7570\u306a\u308a\u3001\u300c\u30c6\u30b9\u30c8\u3067\u306f\u51fa\u306a\u3044\u304c\u672c\u756a\u3060\u3051 EBADF\u300d\u3068\u3044\u3046\u3053\u3068\u3082\u73cd\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p> <p>\u3053\u3053\u307e\u3067\u3092\u307e\u3068\u3081\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u6574\u7406\u3067\u304d\u307e\u3059\u3002<\/p> <table border=\"1\" cellspacing=\"0\" cellpadding=\"4\" style=\"border-collapse:collapse;\"> <tr style=\"background-color:#eeeeee;\"> <th>\u89b3\u70b9<\/th> <th>\u610f\u5473<\/th> <\/tr> <tr> <td>\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9<\/td> <td><code>EBADF<\/code>\uff08\u591a\u304f\u306e Linux \u3067\u306f 9\uff09<\/td> <\/tr> <tr> <td>\u5178\u578b\u7684\u306a\u30e1\u30c3\u30bb\u30fc\u30b8<\/td> <td><code>Bad file descriptor<\/code><\/td> <\/tr> <tr> <td>\u30ab\u30fc\u30cd\u30eb\u306e\u4e3b\u5f35<\/td> <td>\u300c\u305d\u306e FD \u306f\u3001\u4eca\u306e\u30d7\u30ed\u30bb\u30b9\u304b\u3089\u898b\u308b\u3068\u6709\u52b9\u3067\u306f\u306a\u3044\u300d<\/td> <\/tr> <tr> <td>\u30a2\u30d7\u30ea\u5074\u306e\u72b6\u614b<\/td> <td>\u300c\u6709\u52b9\u3060\u3068\u601d\u3044\u8fbc\u3093\u3067\u4f7f\u3063\u3066\u3044\u308b\u300d\u53ef\u80fd\u6027\u304c\u9ad8\u3044<\/td> <\/tr> <tr> <td>\u672c\u8cea\u7684\u306a\u554f\u984c<\/td> <td>\u30ea\u30bd\u30fc\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\uff08\u751f\u6210\u30fb\u5171\u6709\u30fb\u7834\u68c4\uff09\u306e\u7834\u7dbb<\/td> <\/tr> <\/table> <p>\u7b2c2\u7ae0\u3067\u306f\u3001\u3042\u304f\u307e\u3067\u4ed5\u69d8\u30ec\u30d9\u30eb\u306e\u8a71\u306b\u3068\u3069\u3081\u307e\u3057\u305f\u3002\u6b21\u7ae0\u304b\u3089\u306f\u3001\u3053\u306e\u62bd\u8c61\u7684\u306a\u5b9a\u7fa9\u304c\u3001\u73fe\u5b9f\u306e\u30b3\u30fc\u30c9\u3084\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u74b0\u5883\u3067\u3069\u306e\u3088\u3046\u306a\u5f62\u306e\u30d0\u30b0\u3068\u3057\u3066\u73fe\u308c\u308b\u306e\u304b\u3092\u3001\u5178\u578b\u30d1\u30bf\u30fc\u30f3\u3054\u3068\u306b\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u3053\u3092\u62bc\u3055\u3048\u308b\u3053\u3068\u3067\u3001\u81ea\u5206\u306e\u74b0\u5883\u3067\u8d77\u304d\u3066\u3044\u308b EBADF \u304c\u300c\u3069\u306e\u30ab\u30c6\u30b4\u30ea\u306b\u5c5e\u3059\u308b\u306e\u304b\u300d\u3092\u5207\u308a\u5206\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p> \n\n<a id=\"sec03\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u4e8c\u91cdclose\u30fb\u5bff\u547d\u5207\u308cFD\u30fb\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u3067\u8d77\u3053\u308b\u5178\u578b\u7684\u306a\u7834\u7dbb\u30d1\u30bf\u30fc\u30f3<\/h2> <p>EBADF \u306e\u5b9a\u7fa9\u304c\u5206\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001\u300c\u5b9f\u969b\u306e\u73fe\u5834\u3067\u3069\u3046\u3044\u3046\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3068 EBADF \u3092\u8e0f\u3080\u306e\u304b\u300d\u3092\u30d1\u30bf\u30fc\u30f3\u3068\u3057\u3066\u6574\u7406\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Linux \/ CentOS \u74b0\u5883\u3067\u4e00\u822c\u7684\u306b\u77e5\u3089\u308c\u3066\u3044\u308b\u5178\u578b\u30d1\u30bf\u30fc\u30f3\u306e\u307f\u3092\u6271\u3044\u3001\u60f3\u50cf\u4e0a\u306e\u7279\u6b8a\u4e8b\u4f8b\u306f\u53d6\u308a\u4e0a\u3052\u307e\u305b\u3093\u3002<\/p> <h3>1. \u4e8c\u91cd close\uff08same FD \u30922\u56de\u4ee5\u4e0a\u9589\u3058\u308b\uff09<\/h3> <p>\u3082\u3063\u3068\u3082\u53e4\u5178\u7684\u3067\u5206\u304b\u308a\u3084\u3059\u3044\u306e\u304c\u300c\u4e8c\u91cd close\u300d\u3067\u3059\u3002C \u306e\u4e16\u754c\u3067\u306f\u6b21\u306e\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p> <pre><code>int fd = open(\"file.log\", O_WRONLY | O_CREAT | O_APPEND, 0644); if (fd == -1) { \/* \u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0 *\/ }\n\n\/* \u4f55\u3089\u304b\u306e\u51e6\u7406 *\/\n\nclose(fd); \/* 1\u56de\u76ee\u306e close \u306f OK \/\nclose(fd); \/ \u3053\u3053\u3067 EBADF \u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b *\/\n<\/code><\/pre>\n\n<p>\u3082\u3061\u308d\u3093\u3001\u591a\u304f\u306e\u5834\u5408\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u3084\u30ec\u30d3\u30e5\u30fc\u3067\u6c17\u4ed8\u3051\u308b\u30ec\u30d9\u30eb\u306e\u30df\u30b9\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306e\u5927\u898f\u6a21\u30b3\u30fc\u30c9\u3067\u306f\u6b21\u306e\u3088\u3046\u306a\u5f62\u3067\u7d1b\u308c\u8fbc\u307f\u307e\u3059\u3002<\/p> <ul> <li>\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u6b63\u5e38\u51e6\u7406\u306e\u4e21\u65b9\u3067\u540c\u3058 <code>close()<\/code> \u3092\u547c\u3093\u3067\u3057\u307e\u3046<\/li> <li>\u30e9\u30c3\u30d1\u95a2\u6570\u5185\u3068\u547c\u3073\u51fa\u3057\u5143\u306e\u4e21\u65b9\u3067 <code>close()<\/code> \u3057\u3066\u3044\u308b<\/li> <li>\u30b9\u30ec\u30c3\u30c9\u9593\u3067 FD \u3092\u5171\u6709\u3057\u3001\u4e00\u65b9\u304c close \u3057\u305f\u3053\u3068\u3092\u4ed6\u65b9\u304c\u77e5\u3089\u306a\u3044<\/li> <\/ul> <p>\u300c\u81ea\u5206\u306f <code>close()<\/code> \u3092\u76f4\u63a5\u66f8\u3044\u3066\u3044\u306a\u3044\u300d\u3068\u3044\u3046\u5834\u5408\u3067\u3082\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u5185\u90e8\u3084\u30ac\u30fc\u30d9\u30b8\u30b3\u30ec\u30af\u30bf\u304c FD \u3092\u9589\u3058\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u3067\u300c\u5ff5\u306e\u305f\u3081 <code>close()<\/code> \u3057\u3066\u304a\u304f\u300d\u3068\u3044\u3063\u305f\u51e6\u7406\u3092\u8ffd\u52a0\u3059\u308b\u3068\u3001\u7d50\u679c\u7684\u306b\u4e8c\u91cd close \u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>2. \u5bff\u547d\u5207\u308c FD\uff08\u69cb\u9020\u4f53\u3084\u30af\u30e9\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u30df\u30b9\uff09<\/h3> <p>\u6b21\u306b\u591a\u3044\u306e\u304c\u300c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5bff\u547d\u306f\u7d42\u308f\u3063\u3066\u3044\u308b\u306e\u306b\u3001FD \u306e\u756a\u53f7\u3060\u3051\u304c\u3069\u3053\u304b\u306b\u6b8b\u3063\u3066\u3044\u308b\u300d\u30b1\u30fc\u30b9\u3067\u3059\u3002\u5178\u578b\u7684\u306b\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306a\u5f62\u3067\u3059\u3002<\/p> <ul> <li>\u4e00\u6642\u7684\u306a\u63a5\u7d9a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30bd\u30b1\u30c3\u30c8\u3001\u30d1\u30a4\u30d7\u306a\u3069\uff09\u3092\u69cb\u9020\u4f53\u306b\u4fdd\u6301\u3057\u3066\u3044\u305f<\/li> <li>\u305d\u306e\u69cb\u9020\u4f53\u304c\u7834\u68c4\u3055\u308c\u308b\u969b\u306b FD \u3092\u9589\u3058\u308b<\/li> <li>\u3057\u304b\u3057\u3001\u5225\u306e\u5834\u6240\u306b\u305d\u306e FD \u756a\u53f7\u3060\u3051\u304c\u30b3\u30d4\u30fc\u3055\u308c\u3066\u304a\u308a\u3001\u5f8c\u304b\u3089\u4f7f\u308f\u308c\u308b<\/li> <\/ul> <p>\u3053\u306e\u5834\u5408\u3001FD \u756a\u53f7\u81ea\u4f53\u306f\u5358\u306a\u308b\u6574\u6570\u3067\u3059\u306e\u3067\u3001\u30e1\u30e2\u30ea\u4e0a\u306b\u6b8b\u308a\u7d9a\u3051\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30ab\u30fc\u30cd\u30eb\u5074\u3067\u306f\u3059\u3067\u306b\u305d\u306e FD \u304c\u518d\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u3001\u300c\u307e\u3063\u305f\u304f\u5225\u306e\u8cc7\u6e90\u300d\u3092\u6307\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u3059\u3089\u3042\u308a\u307e\u3059\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u6b21\u306e\u3088\u3046\u306a\u73fe\u8c61\u304c\u8d77\u304d\u5f97\u307e\u3059\u3002<\/p> <ul> <li>EBADF \u304c\u767a\u751f\u3059\u308b\uff08FD \u304c\u3059\u3067\u306b\u9589\u3058\u3089\u308c\u3066\u3044\u308b\uff09<\/li> <li>\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3084\u30bd\u30b1\u30c3\u30c8\u306b\u5bfe\u3057\u3066\u66f8\u304d\u8fbc\u3093\u3067\u3057\u307e\u3046\uff08\u8ad6\u7406\u7684\u306a\u4e8b\u6545\uff09<\/li> <\/ul> <p>\u5f8c\u8005\u306f\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3068\u3057\u3066\u306f\u8868\u9762\u5316\u3057\u306a\u3044\u305f\u3081\u3001\u30ed\u30b0\u306e\u6b20\u640d\u3084\u30c7\u30fc\u30bf\u4e0d\u6574\u5408\u3068\u3044\u3063\u305f\u5f62\u3067\u9577\u671f\u7684\u306b\u30b7\u30b9\u30c6\u30e0\u3092\u8755\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002EBADF \u304c\u51fa\u3066\u3044\u308b\u3046\u3061\u306f\u307e\u3060\u300c\u691c\u77e5\u53ef\u80fd\u306a\u30d0\u30b0\u300d\u3067\u3042\u308b\u3068\u3082\u8a00\u3048\u307e\u3059\u3002<\/p> <hr> <h3>3. \u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u30fb\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u5171\u6709\u30df\u30b9<\/h3> <p>CentOS \u3067\u3088\u304f\u4f7f\u308f\u308c\u308b Web \u30b5\u30fc\u30d0\u30fc\u30fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u30fb\u30ef\u30fc\u30ab\u30fc\u578b\u306e\u5e38\u99d0\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u3001<code>fork()<\/code> \u3084\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u7528\u3044\u3066\u51e6\u7406\u3092\u4e26\u5217\u5316\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u591a\u304f\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u74b0\u5883\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\u3067 EBADF \u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p> <ul> <li>\u89aa\u30d7\u30ed\u30bb\u30b9\u304c\u5b50\u30d7\u30ed\u30bb\u30b9\u7528\u306e FD \u3092\u3042\u3089\u304b\u3058\u3081\u958b\u304d\u3001<code>fork()<\/code> \u3067\u30b3\u30d4\u30fc<\/li> <li>\u5b50\u30d7\u30ed\u30bb\u30b9\u5074\u306f\u300c\u81ea\u5206\u306b\u306f\u4e0d\u8981\u306a FD \u300d\u3092 <code>close()<\/code> \u3067\u7a4d\u6975\u7684\u306b\u9589\u3058\u308b<\/li> <li>\u4e00\u65b9\u3067\u3001\u89aa\u30d7\u30ed\u30bb\u30b9\u5074\u3082\u30ea\u30bd\u30fc\u30b9\u89e3\u653e\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u540c\u3058 FD \u3092\u9589\u3058\u308b<\/li> <\/ul> <p>\u300c\u3069\u306e\u30d7\u30ed\u30bb\u30b9\uff0f\u30b9\u30ec\u30c3\u30c9\u304c\u3069\u306e FD \u3092\u6240\u6709\u3057\u3066\u3044\u308b\u304b\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u304c\u66d6\u6627\u306a\u307e\u307e\u5b9f\u88c5\u3055\u308c\u308b\u3068\u3001\u4e8c\u91cd close \u3084\u5bff\u547d\u5207\u308c FD \u306e\u6e29\u5e8a\u306b\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u30fbUNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u30fb\u540d\u524d\u4ed8\u304d\u30d1\u30a4\u30d7\u306a\u3069\u306f\u30d7\u30ed\u30bb\u30b9\u9593\u3067\u5171\u6709\u3055\u308c\u3084\u3059\u304f\u3001EBADF \u306e\u539f\u56e0\u306b\u306a\u308a\u304c\u3061\u3067\u3059\u3002<\/p> <p>\u3053\u3053\u3067\u3088\u304f\u3042\u308b\u672c\u97f3\u306f\u3001<\/p> <p>\u300c\u3053\u306e FD\u3001\u672c\u5f53\u306f\u8ab0\u304c\u8cac\u4efb\u6301\u3063\u3066\u9589\u3058\u308b\u3079\u304d\u306a\u3093\u3060\u3063\u3051\uff1f \u3082\u3046\u5206\u304b\u3089\u306a\u304f\u306a\u3063\u3066\u304d\u305f\u2026\u300d<\/p> <p>\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u6240\u6709\u6a29\u306e\u30eb\u30fc\u30eb\u3092\u8a2d\u8a08\u6642\u306b\u304d\u3061\u3093\u3068\u6c7a\u3081\u3066\u304a\u304b\u306a\u3044\u3068\u3001\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3084\u30c6\u30b9\u30c8\u3060\u3051\u3067\u306f\u629c\u3051\u6f0f\u308c\u3092\u9632\u304e\u5207\u308c\u307e\u305b\u3093\u3002<\/p> <hr> <h3>4. \u6a19\u6e96\u5165\u51fa\u529b\u3084 systemd \u7d4c\u7531\u306e FD \u3092\u8aa4\u3063\u3066\u9589\u3058\u308b<\/h3> <p>CentOS 7 \u4ee5\u964d\u3067\u306f\u3001systemd \u306b\u3088\u3063\u3066\u30b5\u30fc\u30d3\u30b9\u304c\u8d77\u52d5\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u4e00\u822c\u7684\u3067\u3059\u3002systemd \u306f\u3001\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30bb\u30b9\u306b\u5bfe\u3057\u3066\u6a19\u6e96\u5165\u529b\u30fb\u6a19\u6e96\u51fa\u529b\u30fb\u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\uff08FD 0, 1, 2\uff09\u306b\u52a0\u3048\u3001<code>socket<\/code> \u30e6\u30cb\u30c3\u30c8\u7d4c\u7531\u3067\u6e21\u3055\u308c\u308b\u30ea\u30c3\u30b9\u30f3\u30bd\u30b1\u30c3\u30c8\u306a\u3069\u3001\u3044\u304f\u3064\u304b\u306e FD \u3092\u4e8b\u524d\u306b\u958b\u3044\u3066\u6e21\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u30b5\u30fc\u30d3\u30b9\u5b9f\u88c5\u5074\u304c\u3053\u308c\u3089\u306e FD \u3092\u300c\u81ea\u524d\u3067\u958b\u3044\u305f\u3082\u306e\u300d\u3068\u8aa4\u89e3\u3057\u3066 <code>close()<\/code> \u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u306a\u304f\u306a\u3063\u305f\u308a\u3001systemd \u5074\u306e\u76e3\u8996\u304c\u3046\u307e\u304f\u52d5\u304b\u306a\u304f\u306a\u3063\u305f\u308a\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3053\u3068\u3067 FD 0,1,2 \u304c\u518d\u5229\u7528\u3055\u308c\u3001\u7d50\u679c\u7684\u306b\u300c\u4e88\u60f3\u5916\u306e\u5834\u6240\u306b\u30ed\u30b0\u304c\u66f8\u304b\u308c\u308b\u300d\u3068\u3044\u3063\u305f\u73fe\u8c61\u3082\u8d77\u3053\u308a\u5f97\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u72b6\u6cc1\u3067 <code>write(2)<\/code> \u3084\u30e9\u30a4\u30d6\u30e9\u30ea\u7d4c\u7531\u306e I\/O \u3092\u884c\u3046\u3068\u3001<code>EBADF<\/code> \u3084\u305d\u306e\u4ed6\u306e I\/O \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3001\u672c\u6765\u306e\u969c\u5bb3\u3068\u306f\u5225\u306e\u30ce\u30a4\u30ba\u3068\u3057\u3066\u30ed\u30b0\u306b\u6df7\u3056\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p> <hr> <p>\u3053\u3053\u307e\u3067\u3067\u3001EBADF \u306e\u4ee3\u8868\u7684\u306a\u300c\u7834\u7dbb\u30d1\u30bf\u30fc\u30f3\u300d\u304c\u898b\u3048\u3066\u304d\u307e\u3057\u305f\u3002<\/p> <ul> <li>\u4e8c\u91cd close<\/li> <li>\u5bff\u547d\u5207\u308c FD \u306e\u518d\u5229\u7528<\/li> <li>\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\uff0f\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u6240\u6709\u6a29\u30df\u30b9<\/li> <li>systemd \u306a\u3069\u5916\u90e8\u304b\u3089\u6e21\u3055\u308c\u305f FD \u306e\u6271\u3044\u30df\u30b9<\/li> <\/ul> <p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u969b\u306b\u81ea\u5206\u306e\u74b0\u5883\u3067\u5207\u308a\u5206\u3051\u308b\u305f\u3081\u306b\u3001<code>strace<\/code> \/ <code>lsof<\/code> \/ <code>\/proc<\/code> \u3092\u4f7f\u3063\u3066\u300cEBADF \u306b\u81f3\u308b\u307e\u3067\u306e\u30b7\u30ca\u30ea\u30aa\u300d\u3092\u4e8b\u5b9f\u30d9\u30fc\u30b9\u3067\u518d\u73fe\u3057\u3001\u3069\u3053\u3067 FD \u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u7834\u7dbb\u3057\u3066\u3044\u308b\u306e\u304b\u3092\u8ffd\u3044\u8fbc\u3080\u624b\u9806\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> \n\n<a id=\"sec04\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">strace \/ lsof \/ \/proc\u3067EBADF\u767a\u751f\u307e\u3067\u306e\u30b7\u30ca\u30ea\u30aa\u3092\u518d\u73fe\u3057\u3066\u8ffd\u3044\u8fbc\u3080<\/h2> <p>EBADF \u306e\u5178\u578b\u30d1\u30bf\u30fc\u30f3\u3092\u628a\u63e1\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u300c\u81ea\u5206\u306e CentOS \u74b0\u5883\u3067\u8d77\u304d\u3066\u3044\u308b EBADF \u304c\u3069\u308c\u306b\u5f53\u305f\u308b\u306e\u304b\u300d\u3092\u3001\u5ba2\u89b3\u7684\u306a\u8a3c\u62e0\u3092\u3082\u3068\u306b\u5207\u308a\u5206\u3051\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Linux \u3067\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u6a19\u6e96\u7684\u306a\u30c4\u30fc\u30eb\u306b\u9650\u5b9a\u3057\u3066\u624b\u9806\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> <h3>1. strace \u3067\u300c\u3069\u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u304c EBADF \u3092\u8fd4\u3057\u3066\u3044\u308b\u304b\u300d\u3092\u7279\u5b9a\u3059\u308b<\/h3> <p><code>strace<\/code> \u306f\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u5b9f\u884c\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3068\u3001\u305d\u306e\u623b\u308a\u5024\u30fb<code>errno<\/code> \u3092\u89b3\u5bdf\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002CentOS \u3067\u3042\u308c\u3070 <code>yum<\/code> \u3084 <code>dnf<\/code> \u7d4c\u7531\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3067\u304d\u307e\u3059\u3002<\/p> <p>\u3059\u3067\u306b\u52d5\u3044\u3066\u3044\u308b\u30d7\u30ed\u30bb\u30b9\u306b\u30a2\u30bf\u30c3\u30c1\u3059\u308b\u5834\u5408\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u304c\u5178\u578b\u3067\u3059\u3002<\/p> <pre><code>strace -f -p &lt;PID&gt; -o \/tmp\/ebadf_trace.log <\/code><\/pre> <ul> <li><code>-f<\/code>\uff1a\u5b50\u30d7\u30ed\u30bb\u30b9\u3082\u8ffd\u8de1\u3059\u308b<\/li> <li><code>-p &lt;PID&gt;<\/code>\uff1a\u5bfe\u8c61\u30d7\u30ed\u30bb\u30b9\u306b\u30a2\u30bf\u30c3\u30c1\u3059\u308b<\/li> <li><code>-o<\/code>\uff1a\u51fa\u529b\u5148\u30d5\u30a1\u30a4\u30eb\u3092\u6307\u5b9a\u3059\u308b<\/li> <\/ul> <p>\u53d6\u5f97\u3057\u305f\u30ed\u30b0\u3092\u691c\u7d22\u3059\u308b\u3068\u3001\u4f8b\u3048\u3070\u6b21\u306e\u3088\u3046\u306a\u884c\u304c\u898b\u3064\u304b\u308b\u306f\u305a\u3067\u3059\u3002<\/p> <pre><code>write(5, \"....\", 123) = -1 EBADF (Bad file descriptor) <\/code><\/pre> <p>\u3053\u306e1\u884c\u304b\u3089\u5206\u304b\u308b\u4e8b\u5b9f\u306f\u3001<\/p> <ul> <li>\u30d7\u30ed\u30bb\u30b9\u306f FD 5 \u306b\u5bfe\u3057\u3066 <code>write()<\/code> \u3057\u3088\u3046\u3068\u3057\u305f<\/li> <li>\u30ab\u30fc\u30cd\u30eb\u306f\u300cFD 5 \u306f\u7121\u52b9\u300d\u3068\u5224\u65ad\u3057\u3001<code>EBADF<\/code> \u3092\u8fd4\u3057\u305f<\/li> <\/ul> <p>\u3053\u3053\u307e\u3067\u7279\u5b9a\u3067\u304d\u308c\u3070\u3001\u300cFD 5 \u304c\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u958b\u304b\u308c\u3001\u3069\u3053\u3067\u9589\u3058\u3089\u308c\u305f\u306e\u304b\u300d\u3092\u6642\u7cfb\u5217\u3067\u8ffd\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u540c\u3058 <code>strace<\/code> \u30ed\u30b0\u5185\u3067 <code>open(...)=5<\/code> \u3084 <code>accept(...)=5<\/code> \u3092\u63a2\u3057\u3001\u305d\u3053\u304b\u3089\u5148\u306e <code>close(5)<\/code> \u307e\u3067\u8ffd\u8de1\u3057\u307e\u3059\u3002\u3053\u306e\u904e\u7a0b\u3067\u3001\u4e8c\u91cd close \u3084\u4e88\u671f\u3057\u306a\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e close \u304c\u898b\u3048\u3066\u304f\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>2. lsof \/proc\/&lt;PID&gt;\/fd \u3067\u300c\u4eca\u958b\u3044\u3066\u3044\u308b FD \u306e\u4e00\u89a7\u300d\u3092\u898b\u308b<\/h3> <p><code>lsof<\/code> \u306f\u3001\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306e\u30aa\u30fc\u30d7\u30f3\u30d5\u30a1\u30a4\u30eb\u4e00\u89a7\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5bfe\u8c61\u30d7\u30ed\u30bb\u30b9\u306e PID \u304c 1234 \u306e\u5834\u5408\u3001\u6b21\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u304c\u4f7f\u3048\u307e\u3059\u3002<\/p> <pre><code>lsof -p 1234 <\/code><\/pre> <p>\u51fa\u529b\u306b\u306f FD \u756a\u53f7\u30fb\u7a2e\u5225\uff08\u30d5\u30a1\u30a4\u30eb\u3001\u30bd\u30b1\u30c3\u30c8\u306a\u3069\uff09\u30fb\u30d1\u30b9\u306a\u3069\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002strace \u3067 EBADF \u3092\u78ba\u8a8d\u3057\u305f FD \u756a\u53f7\uff08\u4f8b\uff1a5\uff09\u306b\u3064\u3044\u3066\u3001<\/p> <ul> <li>\u73fe\u6642\u70b9\u3067 <code>lsof<\/code> \u306b\u51fa\u3066\u3044\u308b\u304b\uff1f<\/li> <li>\u51fa\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u306e FD \u306f\u4f55\u3092\u6307\u3057\u3066\u3044\u308b\u304b\uff1f\uff08\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3001\u30bd\u30b1\u30c3\u30c8\u306a\u3069\uff09<\/li> <\/ul> <p>\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001<\/p> <ul> <li>\u300c\u3059\u3067\u306b\u9589\u3058\u3089\u308c\u3066\u304a\u308a\u3001<code>lsof<\/code> \u306b\u3082\u51fa\u3066\u3044\u306a\u3044\u300d \u2192 \u5b8c\u5168\u306a\u5bff\u547d\u5207\u308c<\/li> <li>\u300c\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u958b\u304d\u76f4\u3055\u308c\u3066\u3044\u308b\u300d \u2192 FD \u518d\u5229\u7528\u306b\u3088\u308b\u8ad6\u7406\u7684\u4e8b\u6545\u306e\u53ef\u80fd\u6027<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u5207\u308a\u5206\u3051\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p> <p>\u540c\u69d8\u306e\u60c5\u5831\u306f\u3001\/proc \u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u3082\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p> <pre><code>ls -l \/proc\/1234\/fd <\/code><\/pre> <p>\u3053\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306e\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u306f\u3001FD \u756a\u53f7\u304b\u3089\u5b9f\u4f53\uff08\u30d5\u30a1\u30a4\u30eb\u30fb\u30bd\u30b1\u30c3\u30c8\u306a\u3069\uff09\u3078\u306e\u5bfe\u5fdc\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5b9a\u671f\u7684\u306b\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u308b\u3053\u3068\u3067\u3001\u300c\u3042\u308b\u6642\u70b9\u3067\u306f FD 5 \u304c file.log \u3092\u6307\u3057\u3066\u3044\u305f\u304c\u3001\u5f8c\u306e\u6642\u70b9\u3067\u306f\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u306a\u3063\u3066\u3044\u308b\u300d\u3068\u3044\u3063\u305f\u5909\u5316\u3082\u89b3\u5bdf\u3067\u304d\u307e\u3059\u3002<\/p> <hr> <h3>3. \u518d\u73fe\u6027\u306e\u3042\u308b\u300c\u30df\u30cb\u30de\u30e0\u306a\u624b\u9806\u300d\u3092\u8a00\u8a9e\u5316\u3059\u308b<\/h3> <p>EBADF \u3092\u6839\u672c\u7684\u306b\u89e3\u6c7a\u3059\u308b\u306b\u306f\u3001\u300c\u3053\u3046\u3044\u3046\u64cd\u4f5c\u3092\u3059\u308b\u3068\u3001\u307b\u307c\u78ba\u5b9f\u306b EBADF \u304c\u51fa\u308b\u300d\u3068\u3044\u3046\u518d\u73fe\u624b\u9806\u3092\u30c6\u30ad\u30b9\u30c8\u5316\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u6709\u52b9\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u5f62\u3067\u3059\u3002<\/p> <ol> <li>\u30b5\u30fc\u30d3\u30b9 A \u3092\u8d77\u52d5\u3059\u308b\uff08systemd \u30e6\u30cb\u30c3\u30c8 foo.service\uff09<\/li> <li>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3092\u624b\u52d5\u5b9f\u884c\u3059\u308b\uff08<code>logrotate -f<\/code>\uff09<\/li> <li>\u305d\u306e\u76f4\u5f8c\u306b\u3001\u30b5\u30fc\u30d3\u30b9 A \u306e\u30ed\u30b0\u306b <code>EBADF<\/code> \u304c\u51fa\u308b<\/li> <\/ol> <p>\u3053\u306e\u624b\u9806\u3068\u3001<code>strace<\/code> \/ <code>lsof<\/code> \/ <code>\/proc<\/code> \u304b\u3089\u5f97\u3089\u308c\u305f\u4e8b\u5b9f\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u6b21\u306e\u3088\u3046\u306a\u4eee\u8aac\u691c\u8a3c\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p> <ul> <li>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u5f8c\u306b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u53e4\u3044 FD \u3092\u4f7f\u3044\u7d9a\u3051\u3066\u3044\u308b\u306e\u304b\uff1f<\/li> <li>systemd \u306e <code>ExecReload<\/code> \u3084 <code>SIGHUP<\/code> \u30cf\u30f3\u30c9\u30e9\u306e\u4e2d\u3067\u3001FD \u306e\u958b\u304d\u76f4\u3057\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u3066\u3044\u308b\u304b\uff1f<\/li> <li>\u8907\u6570\u30d7\u30ed\u30bb\u30b9\u9593\u3067 FD \u306e\u6240\u6709\u6a29\u304c\u3042\u3044\u307e\u3044\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u304b\uff1f<\/li> <\/ul> <p>\u3053\u3053\u307e\u3067\u6765\u308b\u3068\u3001\u5358\u306b\u300cEBADF \u304c\u51fa\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u6f20\u7136\u3068\u3057\u305f\u72b6\u614b\u304b\u3089\u3001<\/p> <ul> <li>\u3069\u306e FD \u304c\u3001<\/li> <li>\u3069\u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3067\u3001<\/li> <li>\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067 EBADF \u3092\u8fd4\u3057\u3066\u3044\u308b\u304b<\/li> <\/ul> <p>\u3092\u3001\u4e8b\u5b9f\u30d9\u30fc\u30b9\u3067\u628a\u63e1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5916\u90e8\u306e\u5c02\u9580\u5bb6\uff08\u4f8b\uff1a\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\uff09\u306b\u76f8\u8ac7\u3059\u308b\u969b\u306b\u3082\u975e\u5e38\u306b\u91cd\u8981\u306a\u60c5\u5831\u3067\u3059\u3002\u518d\u73fe\u624b\u9806\u3068\u6700\u5c0f\u9650\u306e\u30c8\u30ec\u30fc\u30b9\u304c\u3042\u308c\u3070\u3001\u539f\u56e0\u7279\u5b9a\u3084\u6052\u4e45\u5bfe\u7b56\u306e\u8a2d\u8a08\u304c\u683c\u6bb5\u306b\u9032\u3081\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u3046\u3057\u3066\u5207\u308a\u5206\u3051\u305f\u60c5\u5831\u3092\u8e0f\u307e\u3048\u3001CentOS \u306e\u30b5\u30fc\u30d3\u30b9\u7ba1\u7406\uff08systemd\uff09\u3068\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u7ba1\u7406\u306e\u95a2\u4fc2\u3092\u6574\u7406\u3057\u3001\u300c\u518d\u8d77\u52d5\u306b\u983c\u3089\u305a\u306b\u518d\u8a2d\u5b9a\u30fb\u518d\u63a5\u7d9a\u3067\u7acb\u3066\u76f4\u3059\u300d\u305f\u3081\u306e\u8a2d\u8a08\u306e\u571f\u53f0\u3092\u4f5c\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p> \n\n<a id=\"sec05\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">CentOS\u306e\u30b5\u30fc\u30d3\u30b9\u7ba1\u7406\uff08systemd\uff09\u3068\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u95a2\u4fc2\u3092\u6574\u7406\u3059\u308b<\/h2> <p>CentOS 7 \u4ee5\u964d\u306e\u591a\u304f\u306e\u74b0\u5883\u3067\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u8d77\u52d5\u3068\u30d7\u30ed\u30bb\u30b9\u7ba1\u7406\u306f systemd \u306b\u3088\u3063\u3066\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002EBADF \u3092\u672c\u6c17\u3067\u3064\u3076\u3057\u306b\u3044\u304f\u306a\u3089\u3001\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u306e\u4e2d\u3060\u3051\u300d\u3092\u898b\u3066\u3082\u4e0d\u5341\u5206\u3067\u3001<strong>systemd \u3068\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u95a2\u4fc2<\/strong>\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u73fe\u5834\u3067\u3088\u304f\u3042\u308b\u672c\u97f3\u3068\u3057\u3066\u3001<\/p> <p>\u300c\u6b63\u76f4\u3001\u30e6\u30cb\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u30c6\u30f3\u30d7\u30ec\u3092\u30b3\u30d4\u30da\u3057\u3066\u308b\u3060\u3051\u3067\u3001FD \u5468\u308a\u306f\u3088\u304f\u5206\u304b\u3063\u3066\u3044\u306a\u3044\u300d<\/p> <p>\u3068\u3044\u3046\u58f0\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u6c7a\u3057\u3066\u73cd\u3057\u3044\u8a71\u3067\u306f\u306a\u304f\u3001CentOS \u306e\u5c0e\u5165\u6642\u306b\u30d9\u30f3\u30c0\u30fc\u3084\u4ed6\u793e\u306e\u8a2d\u5b9a\u3092\u305d\u306e\u307e\u307e\u6d41\u7528\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3067\u306f\u3080\u3057\u308d\u4e00\u822c\u7684\u3067\u3059\u3002\u305f\u3060\u3001\u3053\u306e\u300c\u3088\u304f\u5206\u304b\u3089\u306a\u3044\u3082\u306e\u306b\u89e6\u308a\u305f\u304f\u306a\u3044\u300d\u611f\u899a\u304c\u3001EBADF \u306e\u4f0f\u7dda\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>1. systemd \u304c\u30b5\u30fc\u30d3\u30b9\u306b\u6e21\u3059\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf<\/h3> <p>systemd \u306f\u3001\u30b5\u30fc\u30d3\u30b9\u30d7\u30ed\u30bb\u30b9\u3092\u8d77\u52d5\u3059\u308b\u969b\u306b\u3001\u5c11\u306a\u304f\u3068\u3082\u6b21\u306e FD \u3092\u958b\u3044\u305f\u72b6\u614b\u3067 <code>execve(2)<\/code> \u3057\u307e\u3059\u3002<\/p> <ul> <li>0\uff1a\u6a19\u6e96\u5165\u529b\uff08\u901a\u5e38\u306f <code>\/dev\/null<\/code> \u304b\u3001\u5225\u30e6\u30cb\u30c3\u30c8\u304c\u6e21\u3057\u305f\u30d1\u30a4\u30d7\uff09<\/li> <li>1\uff1a\u6a19\u6e96\u51fa\u529b\uff08journald \u3078\u306e\u30d1\u30a4\u30d7\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u306a\u3069\uff09<\/li> <li>2\uff1a\u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\uff08\u540c\u4e0a\uff09<\/li> <\/ul> <p>\u3055\u3089\u306b\u3001<code>socket<\/code> \u30e6\u30cb\u30c3\u30c8\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u300c\u30bd\u30b1\u30c3\u30c8\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30b7\u30e7\u30f3\u300d\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u30ea\u30c3\u30b9\u30f3\u30bd\u30b1\u30c3\u30c8\u304c 3 \u4ee5\u964d\u306e FD \u3068\u3057\u3066\u4e8b\u524d\u306b\u958b\u304b\u308c\u3001\u74b0\u5883\u5909\u6570\uff08\u4f8b\uff1a<code>LISTEN_FDS<\/code>\uff09\u3068\u3068\u3082\u306b\u30b5\u30fc\u30d3\u30b9\u306b\u6e21\u3055\u308c\u307e\u3059\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306f\u3001\u3053\u306e FD \u3092\u300c\u81ea\u5206\u3067 <code>socket()<\/code> \u3057\u3066 <code>bind()<\/code> \u3057\u305f\u3082\u306e\u300d\u3068\u540c\u3058\u3088\u3046\u306b\u6271\u3046\u8a2d\u8a08\u306b\u3057\u307e\u3059\u3002<\/p> <p>\u3053\u3053\u3067\u306e\u91cd\u8981\u30dd\u30a4\u30f3\u30c8\u306f\u3001<strong>\u300c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u610f\u56f3\u3057\u3066\u3044\u306a\u3044 FD \u304c\u3001\u30d7\u30ed\u30bb\u30b9\u8d77\u52d5\u6642\u70b9\u3067\u3059\u3067\u306b\u958b\u3044\u3066\u3044\u308b\u300d<\/strong>\u3068\u3044\u3046\u4e8b\u5b9f\u3067\u3059\u3002EBADF \u3092\u907f\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u3053\u308c\u3089\u306e FD \u3092\u4e0d\u7528\u610f\u306b <code>close()<\/code> \u3057\u306a\u3044\u3060\u3051\u3067\u306a\u304f\u3001\u3069\u306e FD \u304c\u8ab0\u306e\u6240\u6709\u7269\u306a\u306e\u304b\u3092\u660e\u78ba\u306b\u5207\u308a\u5206\u3051\u3066\u6271\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>2. \u30e6\u30cb\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u8a2d\u5b9a\u3068 FD \u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb<\/h3> <p>systemd \u306e\u30b5\u30fc\u30d3\u30b9\u30e6\u30cb\u30c3\u30c8\u306b\u306f\u3001\u30ed\u30b0\u3084 FD \u306b\u95a2\u4fc2\u3059\u308b\u3044\u304f\u3064\u304b\u306e\u4ee3\u8868\u7684\u306a\u8a2d\u5b9a\u9805\u76ee\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <ul> <li><code>StandardOutput=<\/code> \/ <code>StandardError=<\/code>\uff08journal, syslog, file \u306a\u3069\uff09<\/li> <li><code>LimitNOFILE=<\/code>\uff08\u30d7\u30ed\u30bb\u30b9\u304c\u958b\u3051\u308b FD \u306e\u4e0a\u9650\uff09<\/li> <li><code>ExecStart=<\/code> \/ <code>ExecReload=<\/code> \/ <code>ExecStop=<\/code>\uff08\u518d\u8a2d\u5b9a\u6642\u306e\u6319\u52d5\uff09<\/li> <li><code>Restart=<\/code>\uff08\u7570\u5e38\u7d42\u4e86\u6642\u306e\u518d\u8d77\u52d5\u30dd\u30ea\u30b7\u30fc\uff09<\/li> <\/ul> <p>\u4f8b\u3048\u3070\u3001<code>StandardOutput=file:\/var\/log\/foo.log<\/code> \u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3059\u308b\u3068\u3001systemd \u306f\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304d\u3001\u305d\u306e FD \u3092\u6a19\u6e96\u51fa\u529b\u3068\u3057\u3066\u30b5\u30fc\u30d3\u30b9\u306b\u6e21\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u540c\u3058\u30d5\u30a1\u30a4\u30eb\u3092\u5225\u9014\u958b\u3044\u3066\u30ed\u30b0\u3092\u66f8\u304d\u8fbc\u3080\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u9006\u306b\u8a00\u3046\u3068\u300csystemd \u304c\u6240\u6709\u3057\u3066\u3044\u308b\u30ed\u30b0 FD \u3092\u3001\u30a2\u30d7\u30ea\u304c\u52dd\u624b\u306b\u9589\u3058\u308b\u3079\u304d\u3067\u306f\u306a\u3044\u300d\u3068\u3044\u3046\u5236\u7d04\u304c\u751f\u307e\u308c\u307e\u3059\u3002<\/p> <p>\u4e00\u65b9\u3001<code>LimitNOFILE<\/code> \u306f\u30d7\u30ed\u30bb\u30b9\u306e FD \u4e0a\u9650\u3092\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u8a2d\u5b9a\u3067\u3059\u3002\u672c\u756a\u74b0\u5883\u3060\u3051\u3053\u306e\u5024\u304c\u9ad8\u304f\uff08\u3042\u308b\u3044\u306f\u4f4e\u304f\uff09\u8a2d\u5b9a\u3055\u308c\u3066\u304a\u308a\u3001\u30c6\u30b9\u30c8\u74b0\u5883\u3068\u6319\u52d5\u304c\u7570\u306a\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002FD \u4e0a\u9650\u306b\u8fd1\u3065\u3044\u305f\u72b6\u614b\u3067\u306f\u3001\u610f\u56f3\u3057\u306a\u3044 FD \u518d\u5229\u7528\u3084\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3084\u3059\u304f\u306a\u308a\u3001EBADF \u3060\u3051\u3067\u306a\u304f <code>EMFILE<\/code>\uff08Too many open files\uff09\u3068\u4f75\u767a\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>3. systemd \u518d\u8aad\u307f\u8fbc\u307f\u3068 FD \u306e\u518d\u8a2d\u5b9a<\/h3> <p>\u8a2d\u5b9a\u5909\u66f4\u3084\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u6642\u306b\u3001systemd \u7d4c\u7531\u3067\u30b5\u30fc\u30d3\u30b9\u3092\u518d\u8aad\u307f\u8fbc\u307f\u3059\u308b\u5834\u5408\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30de\u30f3\u30c9\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p> <pre><code>systemctl reload foo.service <\/code><\/pre> <p>\u3053\u306e\u3068\u304d\u3001\u30e6\u30cb\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u5074\u3067 <code>ExecReload=<\/code> \u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u30b3\u30de\u30f3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u591a\u304f\u306e\u30c7\u30fc\u30e2\u30f3\u3084 Web \u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u3053\u306e\u30cf\u30f3\u30c9\u30e9\u306e\u4e2d\u3067\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3084\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u958b\u304d\u76f4\u3057\u3092\u884c\u3044\u307e\u3059\u304c\u3001\u305d\u306e\u5b9f\u88c5\u304c\u4e0d\u5341\u5206\u3060\u3068\u3001<\/p> <ul> <li>\u53e4\u3044 FD \u3092\u9589\u3058\u3066\u3057\u307e\u3063\u305f\u304c\u3001\u65b0\u3057\u3044 FD \u306e\u958b\u304d\u76f4\u3057\u306b\u5931\u6557\u3057\u3066\u3044\u308b<\/li> <li>\u4e00\u90e8\u306e\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u3060\u3051\u304c\u65b0\u3057\u3044 FD \u3092\u53c2\u7167\u3057\u3001\u6b8b\u308a\u304c\u53e4\u3044 FD \u3092\u4f7f\u3044\u7d9a\u3051\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u72b6\u614b\u306b\u306a\u308a\u5f97\u307e\u3059\u3002\u7d50\u679c\u3068\u3057\u3066\u3001\u4e00\u90e8\u306e\u30d7\u30ed\u30bb\u30b9\u3067 EBADF \u304c\u767a\u751f\u3057\u3001\u30ed\u30b0\u3084\u63a5\u7d9a\u306e\u4e0d\u81ea\u7136\u306a\u6b20\u640d\u3068\u3057\u3066\u73fe\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u300creload \u3057\u305f\u3089\u4e00\u77ac\u3060\u3051 EBADF \u304c\u51fa\u308b\u3051\u308c\u3069\u3001\u3059\u3050\u843d\u3061\u7740\u304f\u304b\u3089\u6c17\u306b\u3057\u3066\u3044\u306a\u3044\u300d\u3068\u3044\u3046\u74b0\u5883\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u306f\u88cf\u5074\u3067 FD \u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u7db1\u6e21\u308a\u306b\u306a\u3063\u3066\u3044\u308b\u30b5\u30a4\u30f3\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p> <hr> <h3>4. \u518d\u8d77\u52d5 vs \u518d\u8a2d\u5b9a\u306e\u8a2d\u8a08\u65b9\u91dd<\/h3> <p>systemd \u306f <code>Restart=on-failure<\/code> \u306a\u3069\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u5e38\u7d42\u4e86\u6642\u306b\u81ea\u52d5\u518d\u8d77\u52d5\u3092\u884c\u3048\u307e\u3059\u3002\u3053\u308c\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001EBADF \u306e\u3088\u3046\u306a\u8ad6\u7406\u30d0\u30b0\u3092\u300c\u518d\u8d77\u52d5\u3067\u30ea\u30bb\u30c3\u30c8\u3059\u308b\u6587\u5316\u300d\u3092\u5f37\u5316\u3057\u3066\u3057\u307e\u3046\u9762\u3082\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u672c\u8a18\u4e8b\u3067\u76ee\u6307\u3057\u305f\u3044\u306e\u306f\u3001<\/p> <ul> <li>\u300c\u81f4\u547d\u7684\u306a\u72b6\u614b\u306a\u3089\u5b89\u5168\u306b\u843d\u3068\u3059\u300d<\/li> <li>\u300c\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u3001FD \u306e\u958b\u304d\u76f4\u3057\u306a\u3069\u518d\u8a2d\u5b9a\u3067\u7acb\u3066\u76f4\u3059\u300d<\/li> <\/ul> <p>\u3068\u3044\u30462\u6bb5\u69cb\u3048\u306e\u8a2d\u8a08\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001systemd \u30e6\u30cb\u30c3\u30c8\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e21\u65b9\u3067\u3001\u518d\u8a2d\u5b9a\u7528\u306e\u30d5\u30c3\u30af\uff08ExecReload \u3084 SIGHUP \u30cf\u30f3\u30c9\u30e9\u306a\u3069\uff09\u3092\u8a2d\u8a08\u6bb5\u968e\u304b\u3089\u7d44\u307f\u8fbc\u3093\u3067\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u6b21\u7ae0\u3067\u306f\u3001\u5b9f\u969b\u306b\u30ed\u30b0\u30fb\u30bd\u30b1\u30c3\u30c8\u30fb\u30d1\u30a4\u30d7\u3068\u3044\u3063\u305f FD \u3092\u300c\u5b89\u5168\u306b\u958b\u304d\u76f4\u3059\u300d\u305f\u3081\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3092\u6574\u7406\u3057\u3001EBADF \u3092\u300c\u5358\u306a\u308b\u30a8\u30e9\u30fc\u300d\u304b\u3089\u300c\u81ea\u5df1\u4fee\u5fa9\u306e\u30c8\u30ea\u30ac\u30fc\u300d\u306b\u5909\u3048\u3066\u3044\u304f\u65b9\u6cd5\u3092\u8003\u3048\u3066\u3044\u304d\u307e\u3059\u3002<\/p> \n\n<a id=\"sec06\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u30ed\u30b0\u30fb\u30bd\u30b1\u30c3\u30c8\u30fb\u30d1\u30a4\u30d7\u3092\u5b89\u5168\u306b\u300c\u958b\u304d\u76f4\u3059\u300d\u305f\u3081\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3<\/h2> <p>\u3053\u3053\u304b\u3089\u306f\u3001\u5177\u4f53\u7684\u306b\u300c\u3069\u306e\u3088\u3046\u306b FD \u3092\u958b\u304d\u76f4\u305b\u3070 EBADF \u3092\u56de\u907f\u3057\u3064\u3064\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u843d\u3068\u3055\u305a\u306b\u6e08\u307e\u305b\u3089\u308c\u308b\u304b\u300d\u3068\u3044\u3046\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3092\u6574\u7406\u3057\u307e\u3059\u3002\u5bfe\u8c61\u306f\u4e3b\u306b\u6b21\u306e3\u7a2e\u985e\u3067\u3059\u3002<\/p> <ul> <li>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb<\/li> <li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bd\u30b1\u30c3\u30c8<\/li> <li>\u30d1\u30a4\u30d7\u30fbFIFO\u30fbUNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8<\/li> <\/ul> <p>\u3069\u308c\u3082 CentOS \u4e0a\u306e\u5e38\u99d0\u30d7\u30ed\u30bb\u30b9\u3067\u591a\u7528\u3055\u308c\u308b\u30ea\u30bd\u30fc\u30b9\u3067\u3059\u3002<\/p> <hr> <h3>1. \u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u958b\u304d\u76f4\u3057\u30d1\u30bf\u30fc\u30f3<\/h3> <p>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u5f8c\u306b EBADF \u304c\u51fa\u308b\u30d1\u30bf\u30fc\u30f3\u306f\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u5178\u578b\u7684\u306a\u5bfe\u7b56\u3068\u3057\u3066\u306f\u3001\u30ed\u30b0\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3067\u300c\u518d\u30aa\u30fc\u30d7\u30f3\u51e6\u7406\u300d\u3092\u5b9f\u88c5\u3057\u3001<code>SIGUSR1<\/code> \u3084 <code>SIGHUP<\/code> \u3092\u53d7\u3051\u53d6\u3063\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u6b21\u306e\u3088\u3046\u306a\u624b\u9806\u3092\u8e0f\u307f\u307e\u3059\u3002<\/p> <ol> <li>\u73fe\u5728\u306e\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3078\u306e FD \u3092 <strong>\u9589\u3058\u305a\u306b<\/strong>\u3001\u307e\u305a <code>fflush()<\/code> \u7b49\u3067\u30d0\u30c3\u30d5\u30a1\u3092\u30d5\u30e9\u30c3\u30b7\u30e5\u3059\u308b<\/li> <li>\u30ed\u30fc\u30c6\u30fc\u30c8\u6e08\u307f\u30d5\u30a1\u30a4\u30eb\u3068\u306f\u5225\u306b\u3001\u65b0\u3057\u3044\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3092 <code>open()<\/code> \u3059\u308b<\/li> <li>\u65b0\u3057\u3044 FD \u304c\u53d6\u5f97\u3067\u304d\u3066\u304b\u3089\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u53e4\u3044 FD \u3092\u9589\u3058\u308b<\/li> <\/ol> <p>\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001\u300c\u65b0\u3057\u3044 FD \u304c\u78ba\u4fdd\u3067\u304d\u308b\u307e\u3067\u306f\u3001\u53e4\u3044 FD \u3092\u624b\u653e\u3055\u306a\u3044\u300d\u3068\u3044\u3046\u9806\u756a\u3067\u3059\u3002\u4e07\u4e00 <code>open()<\/code> \u306b\u5931\u6557\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u53e4\u3044 FD \u3067\u30ed\u30b0\u3092\u7d99\u7d9a\u3067\u304d\u308b\u4f59\u5730\u3092\u6b8b\u305b\u307e\u3059\u3002<\/p> <p>\u307e\u305f\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306f\u3001\u30ed\u30b0\u3078\u306e\u66f8\u304d\u8fbc\u307f\u30921\u304b\u6240\u306b\u96c6\u7d04\u3057\u3001\u4ed6\u306e\u30b9\u30ec\u30c3\u30c9\u306f\u30ad\u30e5\u30fc\u7d4c\u7531\u3067\u30ed\u30b0\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u6e21\u3059\u8a2d\u8a08\u304c\u3088\u304f\u7528\u3044\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u300c\u30ed\u30b0\u30ef\u30fc\u30ab\u30fc\u30b9\u30ec\u30c3\u30c9\u65b9\u5f0f\u300d\u306b\u3057\u3066\u304a\u304f\u3068\u3001FD \u306e\u958b\u304d\u76f4\u3057\u51e6\u7406\u3082\u305d\u306e\u30b9\u30ec\u30c3\u30c9\u5185\u306b\u9589\u3058\u8fbc\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u4ed6\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u53e4\u3044 FD \u3092\u63e1\u308a\u7d9a\u3051\u308b\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u305b\u307e\u3059\u3002<\/p> <hr> <h3>2. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bd\u30b1\u30c3\u30c8\u306e\u518d\u63a5\u7d9a\u30d1\u30bf\u30fc\u30f3<\/h3> <p>\u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u3078\u306e TCP \u63a5\u7d9a\u306a\u3069\u3067 EBADF \u3084\u305d\u306e\u4ed6\u306e I\/O \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u4e00\u822c\u7684\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u51e6\u7406\u30d1\u30bf\u30fc\u30f3\u3092\u53d6\u308a\u307e\u3059\u3002<\/p> <ul> <li>\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306b\u3001\u305d\u306e FD \u3092\u9589\u3058\u308b<\/li> <li>\u4e00\u5b9a\u306e\u30d0\u30c3\u30af\u30aa\u30d5\uff08\u518d\u8a66\u884c\u9593\u9694\uff09\u3092\u7f6e\u3044\u3066\u3001\u65b0\u3057\u3044\u30bd\u30b1\u30c3\u30c8\u3092 <code>socket()<\/code> \u304b\u3089\u4f5c\u308a\u76f4\u3059<\/li> <li>\u518d\u63a5\u7d9a\u304c\u6210\u529f\u3057\u305f\u3089\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u72b6\u614b\u3092\u300c\u63a5\u7d9a\u6e08\u307f\u300d\u306b\u623b\u3059<\/li> <\/ul> <p>\u3053\u3053\u3067\u306e\u6ce8\u610f\u70b9\u306f\u3001<strong>\u300c\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3089\u3068\u306b\u304b\u304f close\u300d\u3060\u3051\u3067\u306f\u5341\u5206\u3067\u306a\u3044<\/strong>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u524d\u7ae0\u307e\u3067\u3067\u898b\u305f\u3068\u304a\u308a\u3001FD \u756a\u53f7\u81ea\u4f53\u306f\u518d\u5229\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u300c\u30a8\u30e9\u30fc\u304c\u51fa\u305f FD \u756a\u53f7\u300d\u3092\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3084\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u6b8b\u3057\u305f\u307e\u307e\u306b\u3059\u308b\u3068\u3001\u5f8c\u7d9a\u51e6\u7406\u3067\u8aa4\u3063\u3066\u4f7f\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <p>\u305d\u306e\u305f\u3081\u3001\u518d\u63a5\u7d9a\u30ed\u30b8\u30c3\u30af\u3067\u306f\u3001<\/p> <ul> <li>FD \u756a\u53f7\u3092\u4fdd\u6301\u3059\u308b\u5909\u6570\u3092\u300c\u7121\u52b9\u5024\u300d\uff08\u4f8b\uff1a-1\uff09\u306b\u30af\u30ea\u30a2\u3059\u308b<\/li> <li>FD \u3092\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u6301\u3064\u69cb\u9020\u4f53\u3084\u30af\u30e9\u30b9\u306e\u5834\u5408\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u81ea\u4f53\u3092\u518d\u751f\u6210\u3059\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u300c\u8ad6\u7406\u7684\u306a\u7834\u68c4\u300d\u3082\u5408\u308f\u305b\u3066\u884c\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u5358\u306b <code>close()<\/code> \u3059\u308b\u3060\u3051\u3067\u306f\u3001\u30b3\u30fc\u30c9\u4e0a\u306e\u72b6\u614b\u30e2\u30c7\u30eb\u304c\u66f4\u65b0\u3055\u308c\u305a\u3001EBADF \u306e\u518d\u767a\u3092\u62db\u304d\u307e\u3059\u3002<\/p> <hr> <h3>3. \u30d1\u30a4\u30d7\u30fbFIFO\u30fbUNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u306e\u518d\u751f\u6210<\/h3> <p>\u30d7\u30ed\u30bb\u30b9\u9593\u901a\u4fe1\u3067\u4f7f\u308f\u308c\u308b\u30d1\u30a4\u30d7\u30fbFIFO\u30fbUNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3084 TCP \u30bd\u30b1\u30c3\u30c8\u306b\u6bd4\u3079\u3066\u300c\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3069\u306e FD \u3092\u8cac\u4efb\u3092\u6301\u3063\u3066\u9589\u3058\u308b\u304b\u300d\u304c\u66d6\u6627\u306b\u306a\u308a\u3084\u3059\u3044\u30ea\u30bd\u30fc\u30b9\u3067\u3059\u3002<\/p> <p>\u4f8b\u3048\u3070\u3001systemd \u306e <code>socket<\/code> \u30e6\u30cb\u30c3\u30c8\u3067 UNIX \u30c9\u30e1\u30a4\u30f3\u30bd\u30b1\u30c3\u30c8\u3092\u4f5c\u6210\u3057\u3001\u8907\u6570\u306e\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u304c\u63a5\u7d9a\u3059\u308b\u69cb\u6210\u3092\u8003\u3048\u3066\u307f\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u30bd\u30b1\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u751f\u6210\u30fb\u524a\u9664\u306f systemd \u304c\u884c\u3044\u3001\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u3057\u3066\u63a5\u7d9a\u3057\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u69cb\u6210\u3067 EBADF \u304c\u751f\u3058\u305f\u5834\u5408\u3001<\/p> <ul> <li>systemd \u5074\u306e\u30bd\u30b1\u30c3\u30c8\u30e6\u30cb\u30c3\u30c8\u304c\u9069\u5207\u306b\u52d5\u3044\u3066\u3044\u308b\u304b<\/li> <li>\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u5074\u304c\u53e4\u3044\u63a5\u7d9a\u3092\u9069\u5207\u306b\u9589\u3058\u3066\u3044\u308b\u304b<\/li> <\/ul> <p>\u3092\u5207\u308a\u5206\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30ef\u30fc\u30ab\u30fc\u30d7\u30ed\u30bb\u30b9\u5074\u3067\u306f\u3001TCP \u3068\u540c\u69d8\u306b\u3001<\/p> <ul> <li>\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306b\u63a5\u7d9a FD \u3092\u9589\u3058\u3001\u5909\u6570\u3092\u7121\u52b9\u5024\u306b\u3059\u308b<\/li> <li>\u4e00\u5b9a\u306e\u30dd\u30ea\u30b7\u30fc\u306b\u57fa\u3065\u304d\u3001\u518d\u63a5\u7d9a\u3092\u8a66\u307f\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u30d1\u30bf\u30fc\u30f3\u3092\u53d6\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u300c\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u30bd\u30b1\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u305d\u306e\u3082\u306e\u3092\u4f5c\u6210\u30fb\u524a\u9664\u3059\u308b\u304b\u300d\u3068\u3001\u300c\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u63a5\u7d9a FD \u3092\u7ba1\u7406\u3059\u308b\u304b\u300d\u3092\u6df7\u540c\u3057\u306a\u3044\u3053\u3068\u3067\u3059\u3002<\/p> <hr> <h3>4. \u300c\u958b\u304d\u76f4\u3057\u300d\u3092\u524d\u63d0\u306b\u3057\u305f\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/h3> <p>\u3053\u3053\u307e\u3067\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u307e\u3068\u3081\u308b\u3068\u3001EBADF \u3092\u6016\u304c\u3089\u305a\u306b\u6271\u3046\u305f\u3081\u306b\u306f\u3001<\/p> <ul> <li>\u30ed\u30b0\u30fb\u30bd\u30b1\u30c3\u30c8\u30fb\u30d1\u30a4\u30d7\u306a\u3069\u3092\u300c\u958b\u304d\u3063\u3071\u306a\u3057\u306e\u524d\u63d0\u300d\u3067\u8a2d\u8a08\u3057\u306a\u3044<\/li> <li>\u4e00\u5b9a\u306e\u30c8\u30ea\u30ac\u30fc\uff08\u30b7\u30b0\u30ca\u30eb\u3084\u8a2d\u5b9a\u5909\u66f4\u3001\u30a8\u30e9\u30fc\u306a\u3069\uff09\u3067 FD \u3092\u958b\u304d\u76f4\u3059\u524d\u63d0\u3067\u8a2d\u8a08\u3059\u308b<\/li> <\/ul> <p>\u3053\u3068\u304c\u30dd\u30a4\u30f3\u30c8\u306b\u306a\u308a\u307e\u3059\u3002\u73fe\u5834\u306e\u672c\u97f3\u3068\u3057\u3066\u306f\u3001<\/p> <p>\u300c\u6b63\u76f4\u3001\u958b\u304d\u76f4\u3057\u524d\u63d0\u306e\u8a2d\u8a08\u306b\u3059\u308b\u3068\u30b3\u30fc\u30c9\u91cf\u3082\u5897\u3048\u308b\u3057\u3001\u30c6\u30b9\u30c8\u3082\u5927\u5909\u306b\u306a\u308b\u300d<\/p> <p>\u3068\u3044\u3046\u611f\u899a\u3082\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u78ba\u304b\u306b\u4e00\u9762\u306e\u771f\u5b9f\u3067\u3059\u304c\u3001FD \u3092\u958b\u304d\u76f4\u3059\u3053\u3068\u3092\u524d\u63d0\u306b\u3057\u3066\u304a\u304f\u3068\u3001<\/p> <ul> <li>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u69cb\u6210\u5909\u66f4\u306b\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u308b<\/li> <li>\u969c\u5bb3\u767a\u751f\u6642\u306b\u300cFD \u3092\u958b\u304d\u76f4\u3057\u3066\u7acb\u3066\u76f4\u3059\u300d\u3068\u3044\u3046\u9078\u629e\u80a2\u3092\u6301\u3066\u308b<\/li> <\/ul> <p>\u3068\u3044\u3046\u9577\u671f\u7684\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u7ae0\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u8a2d\u8a08\u3092\u652f\u3048\u308b\u300c\u904b\u7528\u5074\u306e\u5de5\u592b\u300d\u3068\u3057\u3066\u3001\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u8a2d\u5b9a\u5909\u66f4\u6642\u306b EBADF \u3092\u51fa\u3055\u306a\u3044\u305f\u3081\u306e\u904b\u7528\u8a2d\u8a08\u3092\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p> \n\n<a id=\"sec07\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u8a2d\u5b9a\u5909\u66f4\u6642\u306bEBADF\u3092\u51fa\u3055\u306a\u3044\u305f\u3081\u306e\u904b\u7528\u8a2d\u8a08<\/h2> <p>\u3053\u3053\u307e\u3067\u3067\u3001FD \u3092\u5b89\u5168\u306b\u958b\u304d\u76f4\u3059\u305f\u3081\u306e\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u30b3\u30fc\u30c9\u306e\u4f5c\u308a\u8fbc\u307f\u3060\u3051\u3067\u306f\u30ab\u30d0\u30fc\u3057\u304d\u308c\u306a\u3044\u306e\u304c\u300c\u904b\u7528\u306e\u73fe\u5b9f\u300d\u3067\u3059\u3002\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u3084\u8a2d\u5b9a\u5909\u66f4\u306f\u3001\u73fe\u5834\u306e\u4e8b\u60c5\uff08\u76e3\u67fb\u8981\u4ef6\u3001\u5bb9\u91cf\u5236\u9650\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6642\u9593\u306a\u3069\uff09\u306b\u5f37\u304f\u7e1b\u3089\u308c\u308b\u305f\u3081\u3001\u904b\u7528\u8a2d\u8a08\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u565b\u307f\u5408\u3063\u3066\u3044\u306a\u3044\u3068\u3001\u3069\u3046\u3057\u3066\u3082 EBADF \u3092\u542b\u3080 I\/O \u30a8\u30e9\u30fc\u304c\u51fa\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u3053\u3053\u3067\u306f\u3001CentOS \u74b0\u5883\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u30fb\u8a2d\u5b9a\u5909\u66f4\u306e\u30d1\u30bf\u30fc\u30f3\u3068\u3001\u305d\u308c\u306b\u5bfe\u5fdc\u3057\u305f\u904b\u7528\u8a2d\u8a08\u306e\u8003\u3048\u65b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> <hr> <h3>1. logrotate \u3068\u30c7\u30fc\u30e2\u30f3\u5074\u306e\u9023\u643a<\/h3> <p>CentOS \u3067\u306f <code>\/etc\/logrotate.d\/<\/code> \u4ee5\u4e0b\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u901a\u3058\u3066\u3001\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u304c\u5b9a\u671f\u5b9f\u884c\u3055\u308c\u308b\u69cb\u6210\u304c\u4e00\u822c\u7684\u3067\u3059\u3002\u4ee3\u8868\u7684\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u306f\u3001<\/p> <ul> <li><code>copytruncate<\/code>\uff1a\u5143\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3057\u305f\u3042\u3068\u3001\u5143\u30d5\u30a1\u30a4\u30eb\u3092\u7a7a\u306b\u3059\u308b<\/li> <li><code>create<\/code>\uff1a\u30ed\u30fc\u30c6\u30fc\u30c8\u5f8c\u306b\u7a7a\u306e\u65b0\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3059\u308b<\/li> <li><code>postrotate ... endscript<\/code>\uff1a\u30ed\u30fc\u30c6\u30fc\u30c8\u5f8c\u306b\u4efb\u610f\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b<\/li> <\/ul> <p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u30ed\u30b0\u306e\u958b\u304d\u76f4\u3057\u3092\u884c\u3046\u5834\u5408\u306f\u3001<code>postrotate<\/code> \u30d6\u30ed\u30c3\u30af\u3067\u30c7\u30fc\u30e2\u30f3\u306b\u30b7\u30b0\u30ca\u30eb\u3092\u9001\u308b\u69cb\u6210\u304c\u3088\u304f\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p> <pre><code>\/var\/log\/foo\/app.log { daily rotate 7 missingok notifempty compress delaycompress create 0640 appuser appgroup postrotate \/bin\/systemctl kill -s HUP foo.service || true endscript } <\/code><\/pre> <p>\u3053\u306e\u5834\u5408\u3001<\/p> <ul> <li>logrotate \u304c\u30d5\u30a1\u30a4\u30eb\u3092\u30ed\u30fc\u30c6\u30fc\u30c8\u3057\u3001\u65b0\u3057\u3044\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/li> <li>\u305d\u306e\u5f8c\u3001<code>SIGHUP<\/code> \u304c foo.service \u306e\u30e1\u30a4\u30f3\u30d7\u30ed\u30bb\u30b9\u306b\u9001\u3089\u308c\u308b<\/li> <li>\u30c7\u30fc\u30e2\u30f3\u5074\u306f\u3001<code>SIGHUP<\/code> \u3092\u30c8\u30ea\u30ac\u30fc\u306b\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u958b\u304d\u76f4\u3057\u3092\u884c\u3046<\/li> <\/ul> <p>\u3068\u3044\u3046\u6d41\u308c\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u5927\u4e8b\u306a\u306e\u306f\u3001<strong>\u300c\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067 FD \u3092\u9589\u3058\u3001\u65b0\u305f\u306b\u958b\u304f\u304b\u300d\u306e\u8cac\u4efb\u3092\u660e\u78ba\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306b\u5bc4\u305b\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002logrotate \u306e <code>copytruncate<\/code> \u3092\u4f7f\u3063\u3066\u7121\u7406\u3084\u308a\u30d5\u30a1\u30a4\u30eb\u5185\u5bb9\u3060\u3051\u3092\u3059\u308a\u66ff\u3048\u308b\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306e FD \u7ba1\u7406\u3068\u565b\u307f\u5408\u308f\u305a\u3001\u7d50\u679c\u3068\u3057\u3066 EBADF \u3084\u30ed\u30b0\u6b20\u640d\u306e\u8981\u56e0\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p> <hr> <h3>2. \u8a2d\u5b9a\u5909\u66f4\u306e\u624b\u9806\u3092\u300c\u4eba\u9593\u306e\u4f5c\u696d\u624b\u9806\u300d\u3068\u3057\u3066\u8a2d\u8a08\u3059\u308b<\/h3> <p>\u8a2d\u5b9a\u5909\u66f4\u6642\u306b EBADF \u304c\u51fa\u308b\u30b1\u30fc\u30b9\u3067\u306f\u3001\u300c\u3084\u308a\u65b9\u304c\u6bce\u56de\u30d0\u30e9\u30d0\u30e9\u300d\u3068\u3044\u3046\u904b\u7528\u3082\u898b\u53d7\u3051\u3089\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001<\/p> <ul> <li>\u3042\u308b\u62c5\u5f53\u8005\u306f <code>systemctl reload<\/code> \u3092\u4f7f\u3046<\/li> <li>\u5225\u306e\u62c5\u5f53\u8005\u306f <code>systemctl restart<\/code> \u3092\u4f7f\u3046<\/li> <li>\u591c\u9593\u62c5\u5f53\u306f <code>kill -HUP<\/code> \u3092\u76f4\u63a5\u6253\u3064<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u72b6\u6cc1\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u904b\u7528\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u3067\u3044\u304f\u3089\u4e01\u5be7\u306b\u518d\u8a2d\u5b9a\u30ed\u30b8\u30c3\u30af\u3092\u66f8\u3044\u3066\u3082\u3001\u300c\u305f\u307e\u305f\u307e\u60f3\u5b9a\u5916\u306e\u64cd\u4f5c\u304c\u884c\u308f\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067 EBADF\u300d\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p> <p>\u305d\u3053\u3067\u91cd\u8981\u306b\u306a\u308b\u306e\u304c\u3001<strong>\u300c\u8a2d\u5b9a\u5909\u66f4\u306e\u6a19\u6e96\u624b\u9806\u66f8\u300d\u3092\u5177\u4f53\u7684\u306b\u6587\u7ae0\u306b\u843d\u3068\u3059<\/strong>\u3053\u3068\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<\/p> <ol> <li>\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3059\u308b<\/li> <li>\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\uff08\u4f8b\uff1a\u5c02\u7528\u30b3\u30de\u30f3\u30c9\u3084\u30c6\u30b9\u30c8\u74b0\u5883\uff09<\/li> <li><code>systemctl reload foo.service<\/code> \u3092\u5b9f\u884c\u3059\u308b<\/li> <li>\u30b8\u30e3\u30fc\u30ca\u30eb\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ed\u30b0\u306e\u4e21\u65b9\u3092\u78ba\u8a8d\u3057\u3001\u30a8\u30e9\u30fc\u304c\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b<\/li> <\/ol> <p>\u3068\u3044\u3063\u305f\u5f62\u3067\u3001\u300c\u4f55\u3092\u300d\u300c\u3069\u306e\u9806\u756a\u3067\u300d\u884c\u3046\u304b\u3092\u6c7a\u3081\u3066\u304a\u304f\u3053\u3068\u3067\u3001EBADF \u3092\u542b\u3080 I\/O \u30a8\u30e9\u30fc\u306e\u767a\u751f\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u9650\u5b9a\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5f8c\u304b\u3089\u539f\u56e0\u8abf\u67fb\u3092\u3059\u308b\u969b\u306b\u3082\u975e\u5e38\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p> <hr> <h3>3. \u76e3\u8996\u3068\u30a2\u30e9\u30fc\u30c8\u8a2d\u8a08\uff1aEBADF \u3092\u5358\u306a\u308b\u30ce\u30a4\u30ba\u306b\u3057\u306a\u3044<\/h3> <p>EBADF \u3092\u672c\u6c17\u3067\u3064\u3076\u3057\u306b\u3044\u304f\u306a\u3089\u3001\u300c\u30ed\u30b0\u306b\u51fa\u305f\u3089 grep \u3067\u306a\u3093\u3068\u306a\u304f\u773a\u3081\u308b\u300d\u3068\u3044\u3046\u904b\u7528\u304b\u3089\u4e00\u6b69\u9032\u3081\u3066\u3001\u76e3\u8996\u8a2d\u8a08\u306e\u4e2d\u306b\u53d6\u308a\u8fbc\u3080\u3053\u3068\u3082\u52b9\u679c\u7684\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<\/p> <ul> <li>journald \u3084\u30ed\u30b0\u53ce\u96c6\u57fa\u76e4\u3067 <code>\"Bad file descriptor\"<\/code> \u3092\u96c6\u8a08\u3059\u308b<\/li> <li>\u5358\u767a\u306e EBADF \u306f\u60c5\u5831\u30ec\u30d9\u30eb\u3001\u4e00\u5b9a\u671f\u9593\u306b\u8907\u6570\u56de\u51fa\u305f\u3089\u8b66\u544a\u30ec\u30d9\u30eb\u3001\u9023\u7d9a\u767a\u751f\u3057\u305f\u3089\u91cd\u8981\u30a2\u30e9\u30fc\u30c8\u2026\u3068\u3044\u3063\u305f\u3057\u304d\u3044\u5024\u3092\u6c7a\u3081\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u65b9\u6cd5\u3067\u3059\u3002\u3053\u3053\u3067\u3082\u3001\u73fe\u5834\u306e\u672c\u97f3\u3068\u3057\u3066\u306f\u3001<\/p> <p>\u300c\u6b63\u76f4\u3001\u30a2\u30e9\u30fc\u30c8\u3092\u5897\u3084\u3059\u3068\u904b\u7528\u304c\u56de\u3089\u306a\u304f\u306a\u308b\u3093\u3058\u3083\u306a\u3044\u304b\u2026\u300d<\/p> <p>\u3068\u3044\u3046\u61f8\u5ff5\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u6700\u521d\u306f\u300c\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u50be\u5411\u3092\u898b\u308b\u3060\u3051\u300d\u300c\u9031\u6b21\u30ec\u30dd\u30fc\u30c8\u3067\u4ef6\u6570\u3092\u78ba\u8a8d\u3059\u308b\u3060\u3051\u300d\u3068\u3044\u3063\u305f\u8efd\u3044\u5c0e\u5165\u304b\u3089\u59cb\u3081\u3001\u5f90\u3005\u306b\u3057\u304d\u3044\u5024\u3084\u904b\u7528\u30eb\u30fc\u30eb\u3092\u6574\u3048\u3066\u3044\u304f\u65b9\u6cd5\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p> <hr> <h3>4. \u904b\u7528\u8a2d\u8a08\u3068\u30b3\u30fc\u30c9\u8a2d\u8a08\u306e\u300c\u3059\u308a\u5408\u308f\u305b\u300d\u3092\u3069\u3053\u3067\u3084\u308b\u304b<\/h3> <p>\u3053\u3053\u307e\u3067\u898b\u3066\u304d\u305f\u3088\u3046\u306b\u3001EBADF \u3092\u6291\u3048\u8fbc\u3080\u306b\u306f\u3001<\/p> <ul> <li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b3\u30fc\u30c9\u5074\u306e\u8a2d\u8a08<\/li> <li>systemd \u30e6\u30cb\u30c3\u30c8\u5b9a\u7fa9<\/li> <li>logrotate \u306a\u3069\u306e\u88dc\u52a9\u30c4\u30fc\u30eb\u8a2d\u5b9a<\/li> <li>\u73fe\u5834\u306e\u904b\u7528\u624b\u9806<\/li> <\/ul> <p>\u304c\u300c\u3072\u3068\u3064\u306e\u30b9\u30c8\u30fc\u30ea\u30fc\u300d\u3068\u3057\u3066\u3064\u306a\u304c\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u3053\u304b1\u304b\u6240\u3060\u3051\u3092\u6700\u9069\u5316\u3057\u3066\u3082\u3001\u4ed6\u306e\u90e8\u5206\u3068\u306e\u6574\u5408\u6027\u304c\u53d6\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u3001\u7d50\u5c40 EBADF \u306f\u518d\u767a\u3057\u307e\u3059\u3002<\/p> <p>\u3068\u306f\u3044\u3048\u3001\u73fe\u5834\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u30c1\u30fc\u30e0\u30fb\u30a4\u30f3\u30d5\u30e9\u30c1\u30fc\u30e0\u30fb\u904b\u7528\u30c1\u30fc\u30e0\u304c\u5206\u304b\u308c\u3066\u3044\u308b\u3053\u3068\u3082\u591a\u304f\u3001\u300c\u8ab0\u304c\u5168\u4f53\u3092\u898b\u3066\u8a2d\u8a08\u3092\u88c1\u304f\u306e\u304b\u300d\u304c\u66d6\u6627\u306b\u306a\u308a\u304c\u3061\u3067\u3059\u3002\u3053\u3053\u304c\u307e\u3055\u306b\u3001\u5916\u90e8\u306e\u5c02\u9580\u5bb6\uff08\u4f8b\uff1a\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\uff09\u304c\u4fa1\u5024\u3092\u51fa\u305b\u308b\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p> <p>\u7b2c\u4e09\u8005\u3068\u3057\u3066\u5168\u4f53\u306e\u69cb\u6210\u3068\u904b\u7528\u3092\u4fef\u77b0\u3057\u3001<\/p> <ul> <li>\u3069\u3053\u307e\u3067\u3092\u30a2\u30d7\u30ea\u6539\u4fee\u3067\u30ab\u30d0\u30fc\u3057\u3001<\/li> <li>\u3069\u3053\u304b\u3089\u3092\u904b\u7528\u8a2d\u8a08\u306e\u898b\u76f4\u3057\u3067\u30ab\u30d0\u30fc\u3059\u308b\u304b<\/li> <\/ul> <p>\u3092\u6574\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u300c\u518d\u8d77\u52d5\u3067\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u3059\u308b\u300d\u6587\u5316\u304b\u3089\u4e00\u6b69\u9032\u3093\u3060\u8a2d\u8a08\u30fb\u904b\u7528\u3078\u3068\u8235\u3092\u5207\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p> <p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u904b\u7528\u3068\u8a2d\u8a08\u3092\u524d\u63d0\u306b\u3001\u300c\u843d\u3068\u3055\u305a\u7acb\u3066\u76f4\u3059\u300d\u305f\u3081\u306e\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u3084\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u306e\u5177\u4f53\u7684\u306a\u8003\u3048\u65b9\u3092\u6574\u7406\u3057\u3001EBADF \u3092\u30c8\u30ea\u30ac\u30fc\u306b\u3057\u305f\u81ea\u5df1\u4fee\u5fa9\u306e\u9053\u7b4b\u3092\u63cf\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/p> \n\n<a id=\"sec08\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u300c\u843d\u3068\u3055\u305a\u7acb\u3066\u76f4\u3059\u300d\u305f\u3081\u306e\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u3068\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u306e\u66f8\u304d\u65b9<\/h2> <p>\u3053\u3053\u304b\u3089\u306f\u3001\u300cEBADF \u304c\u51fa\u305f\u3089\u5373\u30b5\u30fc\u30d3\u30b9\u518d\u8d77\u52d5\u300d\u3067\u306f\u306a\u304f\u3001<strong>\u3067\u304d\u308b\u9650\u308a\u30d7\u30ed\u30bb\u30b9\u3092\u843d\u3068\u3055\u305a\u306b\u7acb\u3066\u76f4\u3059<\/strong>\u305f\u3081\u306e\u8a2d\u8a08\u3092\u5177\u4f53\u7684\u306b\u8003\u3048\u307e\u3059\u3002\u73fe\u5834\u306e\u672c\u97f3\u3068\u3057\u3066\u306f\u3001<\/p> <p>\u300c\u591c\u4e2d\u306b\u843d\u3061\u308b\u304f\u3089\u3044\u306a\u3089\u3001\u591a\u5c11\u306e\u30ed\u30b0\u6b20\u640d\u306f\u98f2\u307f\u8fbc\u3093\u3067\u3067\u3082\u52d5\u304d\u7d9a\u3051\u3066\u307b\u3057\u3044\u300d<\/p> <p>\u3068\u3044\u3046\u30cb\u30fc\u30ba\u304c\u5f37\u304f\u3042\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\u3001\u7121\u7406\u306b\u52d5\u304b\u3057\u7d9a\u3051\u308b\u3068\u3001\u30c7\u30fc\u30bf\u7834\u58ca\u3084\u6574\u5408\u6027\u5d29\u58ca\u306b\u3064\u306a\u304c\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u91cd\u8981\u306b\u306a\u308b\u306e\u304c\u3001<strong>\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u3068\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u306e\u5883\u754c\u7dda\u3092\u3069\u3053\u306b\u5f15\u304f\u304b<\/strong>\u3067\u3059\u3002<\/p> <h3>1. \u300c\u518d\u8a2d\u5b9a\u3067\u6e08\u307e\u305b\u3066\u3088\u3044\u300d\u30b1\u30fc\u30b9\u3068\u300c\u5b89\u5168\u306b\u843d\u3068\u3059\u3079\u304d\u300d\u30b1\u30fc\u30b9<\/h3> <p>\u307e\u305a\u306f\u3001EBADF \u304c\u51fa\u305f\u3068\u304d\u306e\u6271\u3044\u65b9\u3092\u5927\u304d\u304f2\u3064\u306b\u5206\u3051\u3066\u8003\u3048\u307e\u3059\u3002<\/p> <ul> <li><strong>\u518d\u8a2d\u5b9a\u3067\u56de\u5fa9\u3092\u8a66\u307f\u308b\u30b1\u30fc\u30b9<\/strong><br> \u4f8b\uff1a\u30ed\u30b0\u51fa\u529b\u7528 FD\u3001\u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u4e00\u6642\u7684\u306a TCP \u63a5\u7d9a\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u7528\u9014\u306e\u88dc\u52a9\u30d7\u30ed\u30bb\u30b9\u3068\u306e\u901a\u4fe1\u306a\u3069\u3002<\/li> <li><strong>\u5b89\u5168\u306e\u305f\u3081\u306b\u30d7\u30ed\u30bb\u30b9\u3092\u7d42\u4e86\u3059\u3079\u304d\u30b1\u30fc\u30b9<\/strong><br> \u4f8b\uff1a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u3078\u306e\u66f8\u304d\u8fbc\u307f FD \u306a\u3069\u3001\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u306b\u76f4\u63a5\u95a2\u308f\u308b FD\u3002<\/li> <\/ul> <p>EBADF \u304c\u300c\u5358\u306a\u308b\u30ed\u30b0\u306e\u66f8\u304d\u640d\u306d\u300d\u306a\u306e\u304b\u3001\u300c\u30b3\u30a2\u3068\u306a\u308b\u30c7\u30fc\u30bf\u66f8\u304d\u8fbc\u307f\u306e\u7834\u7dbb\u306a\u306e\u304b\u300d\u3092\u533a\u5225\u3059\u308b\u305f\u3081\u306b\u3001\u30b3\u30fc\u30c9\u4e0a\u3067 FD \u306e\u5f79\u5272\u3092\u660e\u793a\u7684\u306b\u5206\u985e\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ed\u30b0 FD \u306b\u306f <code>fd_class = LOG<\/code>\u3001\u91cd\u8981\u306a\u30b9\u30c8\u30ec\u30fc\u30b8 FD \u306b\u306f <code>fd_class = STORAGE_CRITICAL<\/code> \u3068\u3044\u3063\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u6301\u305f\u305b\u308b\u8a2d\u8a08\u3067\u3059\u3002<\/p> <h3>2. \u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u306e\u57fa\u672c\u30d1\u30bf\u30fc\u30f3<\/h3> <p>EBADF \u3092\u53d7\u3051\u53d6\u3063\u305f\u95a2\u6570\u3067\u3001\u3059\u3050\u306b <code>exit()<\/code> \u306b\u884c\u304f\u306e\u3067\u306f\u306a\u304f\u3001\u6b21\u306e\u3088\u3046\u306a\u30b9\u30c6\u30c3\u30d7\u3067\u300c\u7acb\u3066\u76f4\u3057\u300d\u3092\u8a66\u307f\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p> <ol> <li>\u30a8\u30e9\u30fc\u767a\u751f\u7b87\u6240\u3067\u3001\u5bfe\u8c61 FD \u306e\u5f79\u5272\uff08\u30ed\u30b0\uff0f\u88dc\u52a9\u7684\u306a\u30bd\u30b1\u30c3\u30c8\u306a\u3069\uff09\u3092\u5224\u5b9a\u3059\u308b<\/li> <li>\u518d\u8a2d\u5b9a\u5bfe\u8c61\u3067\u3042\u308c\u3070\u3001\u5c02\u7528\u306e\u300c\u30ea\u30ab\u30d0\u30ea\u30cf\u30f3\u30c9\u30e9\u300d\u3092\u547c\u3073\u51fa\u3059<\/li> <li>\u30ea\u30ab\u30d0\u30ea\u30cf\u30f3\u30c9\u30e9\u5185\u3067 FD \u3092\u9589\u3058\u3001\u95a2\u9023\u3059\u308b\u72b6\u614b\u3092\u300c\u672a\u521d\u671f\u5316\u300d\u306b\u623b\u3059<\/li> <li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30d0\u30c3\u30af\u30aa\u30d5\u3092\u631f\u307f\u306a\u304c\u3089\u3001\u518d\u521d\u671f\u5316\u95a2\u6570\u3092\u547c\u3076<\/li> <li>\u518d\u521d\u671f\u5316\u306b\u6210\u529f\u3057\u305f\u3089\u3001\u51e6\u7406\u3092\u7d99\u7d9a\u3059\u308b\uff0f\u5931\u6557\u304c\u7d9a\u304f\u5834\u5408\u306f\u4e0a\u4f4d\u306b\u30a8\u30e9\u30fc\u3092\u4f1d\u642c\u3059\u308b<\/li> <\/ol> <p>\u7591\u4f3c\u30b3\u30fc\u30c9\u3067\u8868\u73fe\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p> <pre><code>ssize_t safe_write(struct fd_wrapper *w, const void *buf, size_t len) { ssize_t n = write(w-&gt;fd, buf, len); if (n &lt; 0 &amp;&amp; errno == EBADF) { if (w-&gt;class == FD_CLASS_LOG) { if (try_reopen_log(w) == 0) { return write(w-&gt;fd, buf, len); \/* \u518d\u8a66\u884c *\/ } else { \/* \u30ed\u30b0\u3060\u3051\u8ae6\u3081\u3066\u51e6\u7406\u7d99\u7d9a\u3001\u306a\u3069\u30dd\u30ea\u30b7\u30fc\u3092\u6c7a\u3081\u308b *\/ return 0; } } else if (w-&gt;class == FD_CLASS_STORAGE_CRITICAL) { \/* \u30c7\u30fc\u30bf\u6574\u5408\u6027\u306b\u95a2\u308f\u308b FD \u306f\u3001\u30d7\u30ed\u30bb\u30b9\u7d42\u4e86\u306a\u3069\u5f37\u3044\u5bfe\u5fdc *\/ abort(); } } return n; } <\/code><\/pre> <p>\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001\u300c\u3069\u306e\u30af\u30e9\u30b9\u306e FD \u306b\u5bfe\u3057\u3066\u3069\u3053\u307e\u3067\u30ea\u30ab\u30d0\u30ea\u3092\u8a66\u307f\u308b\u304b\u300d\u3092\u660e\u6587\u5316\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3059\u3002<\/p> <h3>3. \u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u3068\u3057\u3066\u306e\u300c\u5207\u308a\u96e2\u3057\u300d\u3068\u300c\u7e2e\u9000\u904b\u8ee2\u300d<\/h3> <p>\u518d\u8a2d\u5b9a\u3067\u7acb\u3066\u76f4\u3057\u304d\u308c\u306a\u3044\u5834\u5408\u3067\u3082\u3001\u300c\u3044\u304d\u306a\u308a\u5168\u4f53\u3092\u843d\u3068\u3059\u300d\u306e\u3067\u306f\u306a\u304f\u3001\u90e8\u5206\u7684\u306b\u6a5f\u80fd\u3092\u505c\u6b62\u3057\u3066\u7e2e\u9000\u904b\u8ee2\u306b\u5165\u308b\u9078\u629e\u80a2\u3082\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<\/p> <ul> <li>\u96c6\u8a08\u30fb\u5206\u6790\u7cfb\u306e\u30ed\u30b0\u51fa\u529b\u3060\u3051\u3092\u505c\u6b62\u3057\u3001\u4e3b\u8981\u6a5f\u80fd\u306f\u7d99\u7d9a\u3059\u308b<\/li> <li>\u4e00\u90e8\u306e\u88dc\u52a9\u30b5\u30fc\u30d3\u30b9\u3078\u306e\u63a5\u7d9a\u3092\u8ae6\u3081\u3066\u3001\u30b3\u30a2\u6a5f\u80fd\u3060\u3051\u3092\u63d0\u4f9b\u3059\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u5f62\u3067\u3059\u3002\u3082\u3061\u308d\u3093\u3001\u3053\u3046\u3057\u305f\u7e2e\u9000\u904b\u8ee2\u3092\u884c\u3046\u5834\u5408\u306f\u3001\u76e3\u8996\u3084\u30c0\u30c3\u30b7\u30e5\u30dc\u30fc\u30c9\u3067\u300c\u73fe\u5728\u306f\u7e2e\u9000\u4e2d\u300d\u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3082\u307e\u305f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8a2d\u8a08\u3060\u3051\u3067\u306a\u304f\u3001\u904b\u7528\u8a2d\u8a08\u3068\u306e\u3059\u308a\u5408\u308f\u305b\u304c\u5fc5\u8981\u306a\u90e8\u5206\u3067\u3059\u3002<\/p> <h3>4. \u30c1\u30fc\u30e0\u3068\u3057\u3066\u306e\u5408\u610f\u5f62\u6210<\/h3> <p>\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u3068\u30d5\u30a7\u30a4\u30eb\u30bb\u30fc\u30d5\u306e\u8a2d\u8a08\u306f\u3001\u500b\u4eba\u306e\u7f8e\u5b66\u3060\u3051\u3067\u6c7a\u3081\u3066\u3057\u307e\u3046\u3068\u5371\u967a\u3067\u3059\u3002\u300c\u3053\u306e\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3089\u3069\u3046\u632f\u308b\u821e\u3046\u304b\u300d\u306f\u3001\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u30fbSLA\u30fb\u6cd5\u4ee4\u30fb\u76e3\u67fb\u8981\u4ef6\u306a\u3069\u3068\u3082\u5bc6\u63a5\u306b\u95a2\u4fc2\u3057\u307e\u3059\u3002<\/p> <p>\u305d\u306e\u305f\u3081\u3001<\/p> <ul> <li>\u3069\u306e\u7a2e\u985e\u306e FD \u3067 EBADF \u304c\u51fa\u305f\u3089\u3001\u3069\u306e\u30ec\u30d9\u30eb\u306e\u5bfe\u5fdc\u3092\u53d6\u308b\u304b<\/li> <li>\u3069\u306e\u7bc4\u56f2\u307e\u3067\u304c\u518d\u8a2d\u5b9a\u3067\u3001\u305d\u308c\u4ee5\u964d\u306f\u30d7\u30ed\u30bb\u30b9\u3092\u6b62\u3081\u308b\u304b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u3001\u30c1\u30fc\u30e0\u3068\u3057\u3066\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u843d\u3068\u3059\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u6574\u7406\u304c\u3067\u304d\u3066\u3044\u308c\u3070\u3001\u5916\u90e8\u306e\u5c02\u9580\u5bb6\uff08\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\u306a\u3069\uff09\u306b\u76f8\u8ac7\u3059\u308b\u3068\u304d\u3082\u3001\u300c\u3069\u3053\u307e\u3067\u3092\u793e\u5185\u30dd\u30ea\u30b7\u30fc\u3068\u3057\u3066\u6c7a\u3081\u3066\u304a\u304d\u305f\u3044\u304b\u300d\u300c\u3069\u3053\u304b\u3089\u3092\u6280\u8853\u7684\u306b\u8a70\u3081\u3066\u307b\u3057\u3044\u304b\u300d\u3092\u660e\u78ba\u306b\u4f1d\u3048\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p> <p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u3046\u3057\u305f\u300c\u843d\u3068\u3055\u305a\u7acb\u3066\u76f4\u3059\u300d\u8a2d\u8a08\u3092\u524d\u63d0\u306b\u3001\u518d\u8d77\u52d5\u524d\u63d0\u306e\u904b\u7528\u304b\u3089\u4e00\u6b69\u9032\u307f\u3001EBADF \u3092\u81ea\u5df1\u4fee\u5fa9\u306e\u30c8\u30ea\u30ac\u30fc\u3068\u3057\u3066\u6d3b\u7528\u3057\u3066\u3044\u304f\u8003\u3048\u65b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> \n\n<a id=\"sec09\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u518d\u8d77\u52d5\u524d\u63d0\u306e\u904b\u7528\u304b\u3089\u300cEBADF\u3092\u30c8\u30ea\u30ac\u30fc\u306b\u3057\u305f\u81ea\u5df1\u4fee\u5fa9\u300d\u3078\u306e\u8003\u3048\u65b9<\/h2> <p>\u591a\u304f\u306e\u73fe\u5834\u3067\u306f\u3001\u9577\u5e74\u306e\u7d4c\u9a13\u304b\u3089\u300c\u5b9a\u671f\u518d\u8d77\u52d5\u3057\u3066\u304a\u3051\u3070\u306a\u3093\u3068\u306a\u304f\u5b89\u5b9a\u3059\u308b\u300d\u3068\u3044\u3046\u904b\u7528\u304c\u6839\u4ed8\u3044\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3042\u308b\u7a2e\u306e\u73fe\u5b9f\u89e3\u3067\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u8907\u96d1\u3055\u3084\u53ef\u7528\u6027\u8981\u6c42\u304c\u4e0a\u304c\u308b\u306b\u3064\u308c\u3066\u3001<strong>\u518d\u8d77\u52d5\u524d\u63d0\u306e\u904b\u7528\u306b\u306f\u9650\u754c<\/strong>\u304c\u898b\u3048\u59cb\u3081\u307e\u3059\u3002<\/p> <p>\u3053\u3053\u3067\u306f\u3001EBADF \u3092\u300c\u969c\u5bb3\u306e\u6700\u7d42\u5f62\u300d\u3067\u306f\u306a\u304f\u3001\u300c\u81ea\u5df1\u4fee\u5fa9\u306e\u30c8\u30ea\u30ac\u30fc\u300d\u3068\u3057\u3066\u6271\u3046\u8003\u3048\u65b9\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p> <h3>1. \u300c\u30bc\u30ed\u969c\u5bb3\u300d\u5e7b\u60f3\u304b\u3089\u306e\u8ddd\u96e2\u306e\u53d6\u308a\u65b9<\/h3> <p>\u307e\u305a\u62bc\u3055\u3048\u3066\u304a\u304d\u305f\u3044\u306e\u306f\u3001\u3069\u308c\u3060\u3051\u4e01\u5be7\u306b\u8a2d\u8a08\u30fb\u5b9f\u88c5\u3057\u3066\u3082\u3001<\/p> <ul> <li>\u4e88\u671f\u3057\u306a\u3044\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u30d1\u30bf\u30fc\u30f3<\/li> <li>\u5916\u90e8\u30b5\u30fc\u30d3\u30b9\u306e\u4ed5\u69d8\u5909\u66f4<\/li> <li>\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d0\u30b0<\/li> <\/ul> <p>\u306a\u3069\u306b\u3088\u308a\u3001EBADF \u3092\u542b\u3080 I\/O \u30a8\u30e9\u30fc\u304c\u5b8c\u5168\u306b\u30bc\u30ed\u306b\u306a\u308b\u4fdd\u8a3c\u306f\u306a\u3044\u3001\u3068\u3044\u3046\u4e8b\u5b9f\u3067\u3059\u3002\u300c\u30bc\u30ed\u969c\u5bb3\u300d\u3092\u76ee\u6a19\u306b\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u73fe\u5834\u306f\u300c\u30a8\u30e9\u30fc\u304c\u51fa\u305f\uff1d\u5931\u6557\u300d\u3068\u3044\u3046\u30d7\u30ec\u30c3\u30b7\u30e3\u30fc\u3092\u611f\u3058\u3001\u30ed\u30b0\u3092\u6291\u5236\u3057\u305f\u308a\u3001\u969c\u5bb3\u3092\u96a0\u3057\u305f\u308a\u3059\u308b\u65b9\u5411\u306b\u50be\u304d\u304b\u306d\u307e\u305b\u3093\u3002<\/p> <p>\u3080\u3057\u308d\u3001<\/p> <p>\u300c\u30a8\u30e9\u30fc\u306f\u4e00\u5b9a\u306e\u78ba\u7387\u3067\u8d77\u304d\u308b\u3082\u306e\u3002\u305d\u306e\u3068\u304d\u306b\u3069\u3046\u691c\u77e5\u3057\u3001\u3069\u3046\u53ce\u675f\u3055\u305b\u308b\u304b\u304c\u8a2d\u8a08\u306e\u52dd\u8ca0\u3069\u3053\u308d\u300d<\/p> <p>\u3068\u6349\u3048\u308b\u65b9\u304c\u3001\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p> <h3>2. EBADF \u3092\u691c\u77e5\u3059\u308b\u4ed5\u7d44\u307f\u3092\u30a2\u30d7\u30ea\u5074\u306b\u7d44\u307f\u8fbc\u3080<\/h3> <p>EBADF \u3092\u81ea\u5df1\u4fee\u5fa9\u306e\u30c8\u30ea\u30ac\u30fc\u306b\u3059\u308b\u306b\u306f\u3001\u300c\u3069\u306e\u5c64\u3067 EBADF \u3092\u691c\u77e5\u3059\u308b\u304b\u300d\u3092\u6c7a\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001<\/p> <ul> <li>\u30e9\u30a4\u30d6\u30e9\u30ea\u5c64\u3067\u306e\u30ea\u30c8\u30e9\u30a4\u306b\u4efb\u305b\u308b<\/li> <li>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3067 EBADF \u3092\u691c\u77e5\u3057\u3001\u5c02\u7528\u30cf\u30f3\u30c9\u30e9\u306b\u6e21\u3059<\/li> <li>OS \u30ec\u30a4\u30e4\u306e\u30ed\u30b0\u3060\u3051\u306b\u983c\u308b\uff08\u63a8\u5968\u3055\u308c\u306a\u3044\uff09<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u9078\u629e\u80a2\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u306f\u3001<strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3067 EBADF \u3092\u691c\u77e5\u3057\u3001\u610f\u5473\u306e\u3042\u308b\u30ed\u30b0\u3068\u3068\u3082\u306b\u30ea\u30ab\u30d0\u30ea\u30cf\u30f3\u30c9\u30e9\u306b\u6e21\u3059<\/strong>\u30d1\u30bf\u30fc\u30f3\u304c\u6271\u3044\u3084\u3059\u3044\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p> <p>\u4f8b\u3048\u3070\u3001\u5148\u307b\u3069\u306e <code>safe_write()<\/code> \u306e\u3088\u3046\u306a\u30e9\u30c3\u30d1\u3092\u7d4c\u7531\u3055\u305b\u308c\u3070\u3001\u300c\u3044\u3064\u30fb\u3069\u306e FD \u3067 EBADF \u304c\u51fa\u305f\u304b\u300d\u3092\u4e00\u5143\u7684\u306b\u8a18\u9332\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u60c5\u5831\u306f\u3001\u81ea\u5df1\u4fee\u5fa9\u306e\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u3082\u3001\u5916\u90e8\u306e\u5c02\u9580\u5bb6\u306b\u89e3\u6790\u3092\u4f9d\u983c\u3059\u308b\u969b\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p> <h3>3. \u81ea\u5df1\u4fee\u5fa9\u306e\u4e0a\u9650\u3068\u300c\u89b3\u6e2c\u53ef\u80fd\u6027\u300d<\/h3> <p>\u81ea\u5df1\u4fee\u5fa9\u3092\u8a2d\u8a08\u3059\u308b\u969b\u306b\u5fd8\u308c\u3066\u306f\u3044\u3051\u306a\u3044\u306e\u304c\u3001\u300c\u3069\u3053\u307e\u3067\u81ea\u52d5\u3067\u9811\u5f35\u308a\u3001\u3069\u3053\u304b\u3089\u306f\u4eba\u9593\u306b\u77e5\u3089\u305b\u308b\u304b\u300d\u3068\u3044\u3046\u4e0a\u9650\u306e\u8a2d\u5b9a\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001<\/p> <ul> <li>\u4e00\u5b9a\u671f\u9593\u5185\u306b EBADF \u304c N \u56de\u3092\u8d85\u3048\u305f\u3089\u3001\u81ea\u5df1\u4fee\u5fa9\u3092\u6b62\u3081\u3066\u30a2\u30e9\u30fc\u30c8\u3092\u4e0a\u3052\u308b<\/li> <li>\u81ea\u5df1\u4fee\u5fa9\u306e\u7d50\u679c\u3082\u30ed\u30b0\u306b\u6b8b\u3057\u3001\u300c\u3069\u308c\u3060\u3051\u30ea\u30ab\u30d0\u30ea\u304c\u8d70\u3063\u305f\u304b\u300d\u3092\u5f8c\u304b\u3089\u78ba\u8a8d\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u8a2d\u3051\u308b\u3053\u3068\u3067\u3001\u300c\u81ea\u52d5\u3067\u7acb\u3061\u76f4\u3063\u305f\u3051\u308c\u3069\u3001\u5b9f\u306f\u88cf\u3067 FD \u5468\u308a\u306e\u30c8\u30e9\u30d6\u30eb\u304c\u591a\u767a\u3057\u3066\u3044\u305f\u300d\u3068\u3044\u3063\u305f\u72b6\u614b\u3092\u907f\u3051\u3089\u308c\u307e\u3059\u3002<\/p> <p>\u3053\u306e\u300c\u89b3\u6e2c\u53ef\u80fd\u6027\u300d\u3092\u78ba\u4fdd\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3001\u81ea\u5df1\u4fee\u5fa9\u306f\u300c\u969c\u5bb3\u3092\u96a0\u3059\u4ed5\u7d44\u307f\u300d\u306b\u898b\u3048\u3066\u3057\u307e\u3044\u3001\u30c1\u30fc\u30e0\u306e\u4fe1\u983c\u3092\u5931\u3044\u307e\u3059\u3002\u9006\u306b\u8a00\u3048\u3070\u3001\u81ea\u5df1\u4fee\u5fa9\u306e\u52d5\u304d\u304c\u304d\u3061\u3093\u3068\u898b\u3048\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3057\u3066\u304a\u3051\u3070\u3001<\/p> <p>\u300c\u3053\u306e3\u304b\u6708\u3001EBADF \u306f\u6708\u306b\u6570\u56de\u767a\u751f\u3057\u3066\u3044\u308b\u304c\u3001\u3059\u3079\u3066\u81ea\u52d5\u30ea\u30ab\u30d0\u30ea\u3067\u304d\u3066\u3044\u308b\u300d<\/p> <p>\u3068\u3044\u3063\u305f\u4e8b\u5b9f\u30d9\u30fc\u30b9\u306e\u5bfe\u8a71\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p> <h3>4. \u5916\u90e8\u5c02\u9580\u5bb6\u306e\u6d3b\u7528\u30dd\u30a4\u30f3\u30c8<\/h3> <p>\u81ea\u5df1\u4fee\u5fa9\u306e\u67a0\u7d44\u307f\u3092\u4f5c\u308b\u3068\u3053\u308d\u307e\u3067\u306f\u793e\u5185\u3067\u9032\u3081\u3089\u308c\u3066\u3082\u3001<\/p> <ul> <li>\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u7ba1\u7406\u306e\u7d30\u90e8<\/li> <li>systemd\u30fblogrotate\u30fb\u30a2\u30d7\u30ea\u30b3\u30fc\u30c9\u306e\u7d44\u307f\u5408\u308f\u305b<\/li> <li>\u9ad8\u53ef\u7528\u6027\u69cb\u6210\u3084\u30af\u30e9\u30b9\u30bf\u5316\u3068\u306e\u6574\u5408\u6027<\/li> <\/ul> <p>\u306a\u3069\u306f\u3001\u3069\u3046\u3057\u3066\u3082\u5224\u65ad\u304c\u96e3\u3057\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5c40\u9762\u3067\u306f\u3001Linux \u30b5\u30fc\u30d0\u30fc\u969c\u5bb3\u30fb\u30c7\u30fc\u30bf\u5fa9\u65e7\u30fb\u30ed\u30b0\u89e3\u6790\u3092\u5c02\u9580\u3068\u3057\u3066\u3044\u308b\u5916\u90e8\u306e\u6280\u8853\u8005\u306b\u76f8\u8ac7\u3059\u308b\u3053\u3068\u3067\u3001<\/p> <ul> <li>\u300c\u3044\u307e\u306e\u81ea\u5df1\u4fee\u5fa9\u8a2d\u8a08\u304c\u3001\u3069\u306e\u7a0b\u5ea6\u59a5\u5f53\u306a\u306e\u304b\u300d<\/li> <li>\u300c\u3069\u306e\u90e8\u5206\u306b\u4e2d\u9577\u671f\u7684\u306a\u30ea\u30b9\u30af\u304c\u6b8b\u3063\u3066\u3044\u308b\u306e\u304b\u300d<\/li> <\/ul> <p>\u3092\u5ba2\u89b3\u7684\u306b\u8a55\u4fa1\u3057\u3066\u3082\u3089\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\u306e\u3088\u3046\u306b\u3001<strong>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ec\u30d9\u30eb\u306e\u969c\u5bb3\u8abf\u67fb\u3084\u30ed\u30b0\u30d5\u30a9\u30ec\u30f3\u30b8\u30c3\u30af\u3082\u6271\u3063\u3066\u3044\u308b\u4e8b\u696d\u8005<\/strong>\u3067\u3042\u308c\u3070\u3001EBADF \u3092\u304d\u3063\u304b\u3051\u306b\u3057\u305f\u300c\u3088\u308a\u5e83\u3044\u30ea\u30b9\u30af\u8a55\u4fa1\u300d\u307e\u3067\u542b\u3081\u3066\u76f8\u8ac7\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p> <p>\u6b21\u306e\u7ae0\u3067\u306f\u3001\u3053\u3053\u307e\u3067\u306e\u5185\u5bb9\u3092\u8e0f\u307e\u3048\u3001\u300cEBADF \u3092\u6016\u304c\u3089\u306a\u3044\u30c1\u30fc\u30e0\u300d\u306b\u306a\u308b\u305f\u3081\u306b\u4eca\u65e5\u304b\u3089\u898b\u76f4\u305b\u308b\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\u3092\u6574\u7406\u3057\u3064\u3064\u3001\u4e00\u822c\u8ad6\u306e\u9650\u754c\u3068\u3001\u500b\u5225\u6848\u4ef6\u3067\u306f\u5c02\u9580\u5bb6\u306b\u76f8\u8ac7\u3059\u3079\u304d\u7406\u7531\u3092\u307e\u3068\u3081\u307e\u3059\u3002<\/p> \n\n<a id=\"sec10\"><\/a>\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">EBADF\u3092\u6016\u304c\u3089\u306a\u3044\u30c1\u30fc\u30e0\u306b\u306a\u308b\u305f\u3081\u306b\u4eca\u65e5\u304b\u3089\u898b\u76f4\u305b\u308b\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h2> <p>\u6700\u5f8c\u306b\u3001\u3053\u3053\u307e\u3067\u306e\u5185\u5bb9\u3092\u73fe\u5834\u3067\u4f7f\u3048\u308b\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3068\u3044\u3046\u5f62\u306b\u6574\u7406\u3057\u307e\u3059\u3002\u76ee\u7684\u306f\u3001<strong>\u300cEBADF \u304c\u51fa\u305f\u3089\u7d42\u308f\u308a\u300d\u3067\u306f\u306a\u304f\u3001\u300cEBADF \u3092\u304d\u3063\u304b\u3051\u306b\u8a2d\u8a08\u3068\u904b\u7528\u3092\u4e00\u6b69\u524d\u9032\u3055\u305b\u308b\u300d\u30c1\u30fc\u30e0<\/strong>\u306b\u306a\u308b\u3053\u3068\u3067\u3059\u3002<\/p> <h3>1. \u8a2d\u8a08\u3068\u30b3\u30fc\u30c9\u306b\u95a2\u3059\u308b\u30c1\u30a7\u30c3\u30af<\/h3> <ul> <li>\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3092\u6271\u3046\u90e8\u5206\uff08open\/close\u3001\u30bd\u30b1\u30c3\u30c8\u63a5\u7d9a\u306a\u3069\uff09\u304c\u3001\u30e9\u30c3\u30d1\u95a2\u6570\u3084\u30af\u30e9\u30b9\u3067\u62bd\u8c61\u5316\u3055\u308c\u3066\u3044\u308b\u304b<\/li> <li>FD \u3054\u3068\u306b\u300c\u5f79\u5272\uff08\u30ed\u30b0\uff0f\u30b9\u30c8\u30ec\u30fc\u30b8\uff0f\u88dc\u52a9\u901a\u4fe1\u306a\u3069\uff09\u300d\u3092\u8b58\u5225\u3067\u304d\u308b\u60c5\u5831\u3092\u6301\u3063\u3066\u3044\u308b\u304b<\/li> <li>\u4e8c\u91cd close \u3092\u9632\u3050\u305f\u3081\u306b\u3001<code>close()<\/code> \u5f8c\u306f FD \u3092 -1 \u306a\u3069\u306e\u7121\u52b9\u5024\u306b\u30af\u30ea\u30a2\u3057\u3066\u3044\u308b\u304b<\/li> <li>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30fb\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u74b0\u5883\u3067\u3001\u3069\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u304c\u3069\u306e FD \u3092\u6240\u6709\u3057\u3066\u3044\u308b\u304b\u304c\u660e\u6587\u5316\u3055\u308c\u3066\u3044\u308b\u304b<\/li> <li>EBADF \u767a\u751f\u6642\u306b\u547c\u3073\u51fa\u3059\u300c\u518d\u8a2d\u5b9a\u30cf\u30f3\u30c9\u30e9\u300d\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u304b<\/li> <\/ul> <h3>2. systemd\u30fblogrotate\u30fb\u904b\u7528\u306b\u95a2\u3059\u308b\u30c1\u30a7\u30c3\u30af<\/h3> <ul> <li>systemd \u30e6\u30cb\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e <code>StandardOutput<\/code> \/ <code>StandardError<\/code> \u306e\u8a2d\u5b9a\u3092\u628a\u63e1\u3057\u3066\u3044\u308b\u304b<\/li> <li><code>LimitNOFILE<\/code> \u306e\u5024\u3092\u628a\u63e1\u3057\u3001\u30c6\u30b9\u30c8\u74b0\u5883\u3068\u672c\u756a\u74b0\u5883\u3067\u5927\u304d\u306a\u5dee\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3066\u3044\u308b\u304b<\/li> <li>logrotate \u306e\u8a2d\u5b9a\u304c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5074\u306e\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8\u8a2d\u8a08\uff08\u30b7\u30b0\u30ca\u30eb\u30cf\u30f3\u30c9\u30e9\u306a\u3069\uff09\u3068\u6574\u5408\u3057\u3066\u3044\u308b\u304b<\/li> <li>\u8a2d\u5b9a\u5909\u66f4\u3084\u518d\u8aad\u307f\u8fbc\u307f\u306e\u6a19\u6e96\u624b\u9806\u304c\u6587\u66f8\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u62c5\u5f53\u8005\u306b\u3088\u3063\u3066\u30d0\u30e9\u30d0\u30e9\u306a\u64cd\u4f5c\u3092\u3057\u3066\u3044\u306a\u3044\u304b<\/li> <li>EBADF \u3092\u542b\u3080 I\/O \u30a8\u30e9\u30fc\u306e\u767a\u751f\u72b6\u6cc1\u3092\u3001\u76e3\u8996\u3084\u30ec\u30dd\u30fc\u30c8\u3067\u5b9a\u671f\u7684\u306b\u78ba\u8a8d\u3057\u3066\u3044\u308b\u304b<\/li> <\/ul> <h3>3. \u5fc3\u7406\u7684\u30fb\u7d44\u7e54\u7684\u306a\u30c1\u30a7\u30c3\u30af<\/h3> <ul> <li>\u300c\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u3053\u3068\u81ea\u4f53\u300d\u3092\u904e\u5ea6\u306b\u6050\u308c\u305a\u3001\u300c\u3069\u3046\u6271\u3046\u304b\u300d\u306b\u610f\u8b58\u3092\u5411\u3051\u3089\u308c\u3066\u3044\u308b\u304b<\/li> <li>\u969c\u5bb3\u5831\u544a\u306e\u6587\u5316\u304c\u300c\u8cac\u4efb\u8ffd\u53ca\u300d\u3067\u306f\u306a\u304f\u3001\u300c\u518d\u767a\u9632\u6b62\u3068\u6539\u5584\u300d\u306e\u65b9\u5411\u3092\u5411\u3044\u3066\u3044\u308b\u304b<\/li> <li>\u30a2\u30d7\u30ea\u958b\u767a\u30fb\u30a4\u30f3\u30d5\u30e9\u30fb\u904b\u7528\u306e\u9593\u3067\u3001FD \u3084\u30ed\u30b0\u306b\u95a2\u3059\u308b\u60c5\u5831\u5171\u6709\u304c\u884c\u308f\u308c\u3066\u3044\u308b\u304b<\/li> <li>\u300c\u518d\u8d77\u52d5\u3067\u4e00\u6642\u7684\u306b\u76f4\u3063\u305f\u300d\u30b1\u30fc\u30b9\u3067\u3082\u3001\u5f8c\u65e5\u304d\u3061\u3093\u3068\u539f\u56e0\u5206\u6790\u306e\u5834\u3092\u6301\u3064\u7fd2\u6163\u304c\u3042\u308b\u304b<\/li> <\/ul> <h3>4. \u4e00\u822c\u8ad6\u306e\u9650\u754c\u3068\u3001\u5c02\u9580\u5bb6\u306b\u76f8\u8ac7\u3059\u3079\u304d\u30dd\u30a4\u30f3\u30c8<\/h3> <p>\u3053\u3053\u307e\u3067\u306e\u8a18\u4e8b\u306f\u3001Linux \/ CentOS \u4e0a\u3067\u4e00\u822c\u7684\u306b\u901a\u7528\u3059\u308b\u7bc4\u56f2\u306e\u6280\u8853\u7684\u306a\u4e00\u822c\u8ad6\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306e\u6848\u4ef6\u3067\u306f\u3001<\/p> <ul> <li>\u30b9\u30c8\u30ec\u30fc\u30b8\u69cb\u6210\uff08RAID \/ LVM \/ iSCSI \/ \u5206\u6563\u30b9\u30c8\u30ec\u30fc\u30b8\u306a\u3069\uff09<\/li> <li>\u30af\u30e9\u30b9\u30bf\u69cb\u6210\u3084\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u306e\u4ed5\u7d44\u307f<\/li> <li>\u533b\u7642\u30fb\u91d1\u878d\u30fb\u516c\u5171\u30a4\u30f3\u30d5\u30e9\u306a\u3069\u696d\u7a2e\u3054\u3068\u306e\u6cd5\u4ee4\u30fb\u76e3\u67fb\u8981\u4ef6<\/li> <li>\u65e2\u5b58\u30d9\u30f3\u30c0\u30fc\u3068\u306e\u5951\u7d04\u6761\u4ef6\u3084\u4fdd\u5b88\u7bc4\u56f2<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u8981\u7d20\u304c\u7d61\u307f\u5408\u3044\u3001\u300c\u6559\u79d1\u66f8\u3069\u304a\u308a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u300d\u3092\u305d\u306e\u307e\u307e\u5f53\u3066\u306f\u3081\u3089\u308c\u306a\u3044\u5834\u9762\u304c\u5c11\u306a\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p> <p>\u4f8b\u3048\u3070\u3001<\/p> <ul> <li>EBADF \u304c\u51fa\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u4e00\u90e8\u30ed\u30b0\u304c\u6b20\u640d\u3057\u3066\u3044\u308b\u304c\u3001\u76e3\u67fb\u4e0a\u3069\u3053\u307e\u3067\u8aac\u660e\u304c\u5fc5\u8981\u304b<\/li> <li>FD \u5468\u308a\u306e\u4e0d\u5177\u5408\u304c\u3001\u4eca\u5f8c\u306e\u30c7\u30fc\u30bf\u5fa9\u65e7\u3084\u8a3c\u62e0\u4fdd\u5168\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u304b<\/li> <li>\u30af\u30e9\u30a6\u30c9\u3084\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u3092\u307e\u305f\u3044\u3060\u69cb\u6210\u3067\u3001\u3069\u306e\u30ec\u30a4\u30e4\u307e\u3067\u3092\u793e\u5185\u3067\u8cac\u4efb\u3092\u6301\u3066\u308b\u304b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u8ad6\u70b9\u306f\u3001\u6280\u8853\u3060\u3051\u3067\u306a\u304f\u3001\u5951\u7d04\u30fb\u30ac\u30d0\u30ca\u30f3\u30b9\u30fb\u4e8b\u696d\u7d99\u7d9a\u8a08\u753b\uff08BCP\uff09\u3068\u3082\u95a2\u4fc2\u3057\u307e\u3059\u3002\u3053\u3053\u306f\u3001\u8a18\u4e8b\u30ec\u30d9\u30eb\u306e\u4e00\u822c\u8ad6\u3060\u3051\u3067\u306f\u5224\u65ad\u3057\u304d\u308c\u306a\u3044\u90e8\u5206\u3067\u3059\u3002<\/p> <h3>5. \u5177\u4f53\u7684\u306a\u6b21\u306e\u4e00\u6b69\uff1a\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\u3078\u306e\u76f8\u8ac7<\/h3> <p>\u3082\u3057\u3001<\/p> <ul> <li>CentOS \u3084\u305d\u306e\u4ed6 Linux \u30b5\u30fc\u30d0\u30fc\u3067 EBADF \u304c\u6563\u767a\u3057\u3066\u304a\u308a\u3001\u6839\u672c\u539f\u56e0\u3092\u6574\u7406\u3057\u305f\u3044<\/li> <li>\u30ed\u30b0\u6b20\u640d\u3084\u30b9\u30c8\u30ec\u30fc\u30b8\u969c\u5bb3\u3082\u542b\u3081\u3066\u3001\u30c7\u30fc\u30bf\u5fa9\u65e7\u3084\u5c06\u6765\u306e\u30c8\u30e9\u30d6\u30eb\u6642\u306e\u30ea\u30b9\u30af\u3092\u8a55\u4fa1\u3057\u305f\u3044<\/li> <li>\u533b\u7642\u6a5f\u95a2\u30fb\u4f01\u696d\u30fb\u5b98\u516c\u5e81\u5411\u3051\u30b7\u30b9\u30c6\u30e0\u3067\u3001FD \u5468\u308a\u3092\u542b\u3080\u30a4\u30f3\u30d5\u30e9\u8a2d\u8a08\u3068 BCP \u3092\u898b\u76f4\u3057\u305f\u3044<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u8ab2\u984c\u3092\u304a\u6301\u3061\u3067\u3042\u308c\u3070\u3001<strong>\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240<\/strong>\u306e\u3088\u3046\u306a\u3001\u30c7\u30fc\u30bf\u5fa9\u65e7\u30fb\u30b5\u30fc\u30d0\u969c\u5bb3\u89e3\u6790\u306e\u5c02\u9580\u4e8b\u696d\u8005\u306b\u4e00\u5ea6\u3054\u76f8\u8ac7\u3044\u305f\u3060\u304f\u306e\u304c\u73fe\u5b9f\u7684\u3067\u3059\u3002<\/p> <p>\u672c\u8a18\u4e8b\u3067\u6574\u7406\u3057\u305f\u3088\u3046\u306a\u300cstrace \u30ed\u30b0\u300d\u300clsof \u51fa\u529b\u300d\u300c\u518d\u73fe\u624b\u9806\u30e1\u30e2\u300d\u306a\u3069\u3092\u4f75\u305b\u3066\u3054\u63d0\u4f9b\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u5358\u306b\u300cEBADF \u3092\u6d88\u3059\u300d\u3060\u3051\u3067\u306a\u304f\u3001<\/p> <ul> <li>\u4eca\u5f8c\u8d77\u3053\u308a\u5f97\u308b\u30ea\u30b9\u30af\u306e\u6d17\u3044\u51fa\u3057<\/li> <li>\u8a2d\u8a08\u30fb\u904b\u7528\u30fb\u76e3\u8996\u306e\u3069\u3053\u3092\u3069\u3046\u5909\u3048\u308b\u3068\u5b89\u5b9a\u6027\u304c\u4e0a\u304c\u308b\u304b<\/li> <\/ul> <p>\u3068\u3044\u3063\u305f\u89b3\u70b9\u307e\u3067\u542b\u3081\u3066\u3001\u3088\u308a\u5177\u4f53\u7684\u306a\u63d0\u6848\u306b\u3064\u306a\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p> <p>EBADF \u3092\u300c\u6016\u3044\u8b0e\u306e\u30a8\u30e9\u30fc\u300d\u3068\u3057\u3066\u907f\u3051\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u8a2d\u8a08\u3068\u904b\u7528\u3092\u4e00\u6bb5\u4e0a\u3052\u308b\u305f\u3081\u306e\u304d\u3063\u304b\u3051\u300d\u3068\u3057\u3066\u6349\u3048\u76f4\u3059\u3002\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u5916\u90e8\u306e\u5c02\u9580\u5bb6\u3068\u4e00\u7dd2\u306b\u9032\u3081\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3068\u601d\u3044\u307e\u3059\u3002<\/p> \n\n\n<p>\u3000<\/p> <h2 style=\"font-size:1.2em; font-weight:bold; text-decoration:underline;\">\u88dc\u907a\uff1a\u4e3b\u8981\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u8a00\u8a9e\u3054\u3068\u306eEBADF\u30fbFD\u5468\u308a\u306e\u6ce8\u610f\u70b9<\/h2> <p>\u6700\u5f8c\u306b\u3001\u73fe\u5728\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u4ee3\u8868\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u8a00\u8a9e\u3054\u3068\u306b\u3001EBADF \u3084\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u53d6\u308a\u6271\u3044\u306e\u89b3\u70b9\u3067\u6ce8\u610f\u3057\u3066\u304a\u304d\u305f\u3044\u30dd\u30a4\u30f3\u30c8\u3092\u7c21\u6f54\u306b\u6574\u7406\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u6319\u3052\u308b\u5185\u5bb9\u306f\u4e00\u822c\u7684\u306a\u50be\u5411\u3067\u3042\u308a\u3001\u5b9f\u969b\u306e\u6319\u52d5\u306f\u5404\u8a00\u8a9e\u30e9\u30f3\u30bf\u30a4\u30e0\u3084\u30d0\u30fc\u30b8\u30e7\u30f3\u3001\u5229\u7528\u3057\u3066\u3044\u308b\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p> <h3>C \/ C++<\/h3> <ul> <li>\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3084 <code>open()\/close()<\/code> \u3092\u76f4\u63a5\u6271\u3046\u3053\u3068\u304c\u591a\u304f\u3001\u4e8c\u91cd close\u30fb\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u6f0f\u308c\u304c EBADF \u306e\u4e3b\u56e0\u306b\u306a\u308a\u3084\u3059\u3044\u3002<\/li> <li><code>FILE*<\/code>\uff08\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30b9\u30c8\u30ea\u30fc\u30e0\uff09\u3068\u751f FD\uff08int\uff09\u3092\u6df7\u5728\u3055\u305b\u308b\u5834\u5408\u3001\u305d\u308c\u305e\u308c\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u3092\u5206\u3051\u3066\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li> <li>\u4f8b\u5916\u6a5f\u69cb\u304c\u306a\u3044 C \u3067\u306f\u3001\u623b\u308a\u5024\u3068 <code>errno<\/code> \u3092\u6bce\u56de\u78ba\u8a8d\u3059\u308b\u5b9f\u88c5\u30b9\u30bf\u30a4\u30eb\u304c\u91cd\u8981\u306b\u306a\u308b\u3002<\/li> <\/ul> <h3>Java \/ JVM \u8a00\u8a9e<\/h3> <ul> <li>\u901a\u5e38\u306f <code>InputStream<\/code> \/ <code>OutputStream<\/code>\u3001<code>Channel<\/code> \u7b49\u306e\u62bd\u8c61\u5316\u3092\u901a\u3058\u3066 FD \u3092\u6271\u3046\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b3\u30fc\u30c9\u3067 EBADF \u3092\u76f4\u63a5\u898b\u308b\u3053\u3068\u306f\u591a\u304f\u306a\u3044\u3002<\/li> <li>\u305f\u3060\u3057\u3001<code>close()<\/code> \u306e\u547c\u3073\u5fd8\u308c\u3084\u3001\u660e\u793a\u7684\u306b <code>close()<\/code> \u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u518d\u5229\u7528\u3059\u308b\u3068\u3001\u5185\u90e8\u7684\u306b EBADF \u304c\u767a\u751f\u3057\u3001\u4f8b\u5916\u3068\u3057\u3066\u8868\u9762\u5316\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li> <li>\u30b9\u30ec\u30c3\u30c9\u3084 Executor \u30b5\u30fc\u30d3\u30b9\u5185\u3067\u306e I\/O \u51e6\u7406\u3067\u306f\u3001\u4f8b\u5916\u304c\u63e1\u308a\u3064\u3076\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u30ed\u30ae\u30f3\u30b0\u3068\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u8a2d\u8a08\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li> <\/ul> <h3>Python<\/h3> <ul> <li><code>with<\/code> \u6587\uff08\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u30de\u30cd\u30fc\u30b8\u30e3\uff09\u3092\u4f7f\u3046\u3053\u3068\u3067 FD \u306e\u81ea\u52d5\u30af\u30ed\u30fc\u30ba\u304c\u884c\u308f\u308c\u308b\u304c\u3001\u624b\u52d5\u3067 <code>close()<\/code> \u3092\u547c\u3076\u30b3\u30fc\u30c9\u3068\u6df7\u5728\u3059\u308b\u3068\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u5206\u304b\u308a\u306b\u304f\u304f\u306a\u308b\u3002<\/li> <li>\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3084\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea\u5185\u90e8\u3067 FD \u3092\u958b\u9589\u3057\u3066\u3044\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u3001\u300c\u3061\u3087\u3063\u3068\u3057\u305f\u30e9\u30c3\u30d1\u300d\u3092\u72ec\u81ea\u306b\u631f\u3093\u3060\u7d50\u679c\u3001\u4e8c\u91cd close \u306e\u539f\u56e0\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li> <li>\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\uff08<code>multiprocessing<\/code>\uff09\u3084 uWSGI\/Gunicorn \u306a\u3069\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u5834\u5408\u3001<code>fork()<\/code> \u5f8c\u306e FD \u5171\u6709\u3092\u610f\u8b58\u3057\u305f\u8a2d\u8a08\u304c\u5fc5\u8981\u3002<\/li> <\/ul> <h3>Ruby<\/h3> <ul> <li>IO \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068 FD \u306e\u5bfe\u5fdc\u306f\u62bd\u8c61\u5316\u3055\u308c\u3066\u3044\u308b\u304c\u3001<code>IO.for_fd<\/code> \u306a\u3069\u3092\u4f7f\u3063\u3066\u76f4\u63a5 FD \u3092\u6271\u3046\u5834\u5408\u306f C \u3068\u540c\u69d8\u306e\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/li> <li>Web \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\uff08Rails \u7b49\uff09\u3067\u306f\u3001\u30a2\u30d7\u30ea\u672c\u4f53\u3088\u308a\u3082\u30a2\u30d7\u30ea\u30b5\u30fc\u30d0\uff08Puma, Unicorn \u306a\u3069\uff09\u306e FD \u7ba1\u7406\u304c EBADF \u306e\u7126\u70b9\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3002<\/li> <\/ul> <h3>Go<\/h3> <ul> <li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u3084\u30d5\u30a1\u30a4\u30eb I\/O \u306f\u62bd\u8c61\u5316\u3055\u308c\u3066\u3044\u308b\u304c\u3001<code>net.Listener<\/code> \u3084 <code>os.File<\/code> \u3092\u8de8\u3044\u3060\u30b4\u30eb\u30fc\u30c1\u30f3\u9593\u306e\u5171\u6709\u3067\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u304c\u8907\u96d1\u5316\u3059\u308b\u3053\u3068\u304c\u3042\u308b\u3002<\/li> <li>defer \u306b\u3088\u308b <code>Close()<\/code> \u3067\u300c\u3068\u308a\u3042\u3048\u305a\u9589\u3058\u3066\u304a\u304f\u300d\u30d1\u30bf\u30fc\u30f3\u3092\u591a\u7528\u3059\u308b\u3068\u3001\u4e88\u671f\u3057\u306a\u3044\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u306e close \u304c\u767a\u751f\u3057\u3001\u5225\u306e\u30b4\u30eb\u30fc\u30c1\u30f3\u304b\u3089 EBADF \u76f8\u5f53\u306e\u30a8\u30e9\u30fc\u304c\u8fd4\u308b\u5834\u5408\u304c\u3042\u308b\u3002<\/li> <\/ul> <h3>Rust<\/h3> <ul> <li>\u6240\u6709\u6a29\u30fb\u501f\u7528\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001FD \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306f\u6bd4\u8f03\u7684\u5b89\u5168\u306b\u7ba1\u7406\u3055\u308c\u308b\u304c\u3001<code>std::os::unix::io::RawFd<\/code> \u3092\u76f4\u63a5\u6271\u3046\u30b3\u30fc\u30c9\u3067\u306f C \u3068\u540c\u69d8\u306e\u6ce8\u610f\u304c\u5fc5\u8981\u3002<\/li> <li>unsafe \u30d6\u30ed\u30c3\u30af\u5185\u3067\u306e\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u547c\u3073\u51fa\u3057\u306f\u3001\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u3068 <code>Result<\/code> \u306e\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u5fb9\u5e95\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/li> <\/ul> <h3>Node.js\uff08JavaScript \u30e9\u30f3\u30bf\u30a4\u30e0\uff09<\/h3> <ul> <li>\u975e\u540c\u671f I\/O \u3068\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\uff0fPromise \u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u305f\u3081\u3001\u30a8\u30e9\u30fc\u306e\u4f1d\u642c\u7d4c\u8def\u304c\u9577\u304f\u306a\u308a\u304c\u3061\u3067\u3001EBADF \u76f8\u5f53\u306e\u30a8\u30e9\u30fc\u304c\u3069\u3053\u3067\u767a\u751f\u3057\u305f\u304b\u8ffd\u3044\u306b\u304f\u3044\u3002<\/li> <li>HTTP \u30b5\u30fc\u30d0\u30fb\u30b9\u30c8\u30ea\u30fc\u30e0\u30fb\u30d5\u30a1\u30a4\u30eb I\/O \u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u51e6\u7406\u3067\u306f\u3001\u300c\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067 <code>.end()<\/code> \/ <code>.destroy()<\/code> \u3057\u305f\u304b\u300d\u3092\u30c8\u30ec\u30fc\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u30ed\u30ae\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3002<\/li> <\/ul> <h3>PHP<\/h3> <ul> <li>\u5178\u578b\u7684\u306a Web \u5b9f\u884c\u74b0\u5883\uff08\u30ea\u30af\u30a8\u30b9\u30c8\u3054\u3068\u306b\u30d7\u30ed\u30bb\u30b9\uff0f\u30ef\u30fc\u30ab\u30fc\u304c\u5206\u96e2\u3055\u308c\u308b\uff09\u3067\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u5185\u3067\u958b\u3044\u305f FD \u306f\u30ea\u30af\u30a8\u30b9\u30c8\u7d42\u4e86\u3068\u3068\u3082\u306b\u7834\u68c4\u3055\u308c\u308b\u305f\u3081\u3001\u9577\u5bff\u547d FD \u306b\u8d77\u56e0\u3059\u308b EBADF \u306f\u51fa\u306b\u304f\u3044\u3002<\/li> <li>\u5e38\u99d0\u30d7\u30ed\u30bb\u30b9\u578b\uff08\u5e38\u99d0\u30ef\u30fc\u30ab\u30fc\u3084 CLI \u30c7\u30fc\u30e2\u30f3\uff09\u3068\u3057\u3066 PHP \u3092\u4f7f\u3046\u5834\u5408\u306f\u3001\u4ed6\u8a00\u8a9e\u3068\u540c\u69d8\u306b FD \u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u7ba1\u7406\u304c\u5fc5\u8981\u306b\u306a\u308b\u3002<\/li> <\/ul> <h3>\u307e\u3068\u3081\uff1a\u8a00\u8a9e\u304c\u9055\u3063\u3066\u3082 OS \u306e\u30eb\u30fc\u30eb\u306f\u540c\u3058<\/h3> <p>\u3069\u306e\u8a00\u8a9e\u3067\u3082\u3001\u6700\u7d42\u7684\u306b\u306f Linux \u30ab\u30fc\u30cd\u30eb\u306e FD \u7ba1\u7406\u30eb\u30fc\u30eb\u306e\u4e0a\u3067\u52d5\u3044\u3066\u3044\u307e\u3059\u3002\u62bd\u8c61\u5316\u306e\u30ec\u30a4\u30e4\u306f\u9055\u3063\u3066\u3082\u3001<\/p> <ul> <li>\u300c\u958b\u3044\u305f FD \u306f\u3069\u3053\u3067\u3001\u8ab0\u304c\u9589\u3058\u308b\u306e\u304b\u300d<\/li> <li>\u300c\u9589\u3058\u305f\u3042\u3068\u306b\u53c2\u7167\u3057\u3066\u3044\u306a\u3044\u304b\u300d<\/li> <li>\u300c\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30fb\u30de\u30eb\u30c1\u30d7\u30ed\u30bb\u30b9\u3067\u6240\u6709\u6a29\u304c\u66d6\u6627\u306b\u306a\u3063\u3066\u3044\u306a\u3044\u304b\u300d<\/li> <\/ul> <p>\u3068\u3044\u3046\u554f\u3044\u306f\u5171\u901a\u3067\u3059\u3002\u3082\u3057\u8907\u6570\u8a00\u8a9e\u304c\u6df7\u5728\u3059\u308b\u30b7\u30b9\u30c6\u30e0\uff08\u4f8b\uff1aC \u3067\u66f8\u304b\u308c\u305f\u30c7\u30fc\u30e2\u30f3\uff0bJava \u306e\u696d\u52d9\u30a2\u30d7\u30ea\uff0bPython \u306e\u904b\u7528\u30b9\u30af\u30ea\u30d7\u30c8\uff09\u304c\u540c\u3058\u30b5\u30fc\u30d0\u30fc\u3067\u52d5\u3044\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u8a00\u8a9e\u3054\u3068\u306e\u7fd2\u6163\u306e\u9055\u3044\u304c FD \u5468\u308a\u306e\u30d0\u30b0\u3092\u751f\u307f\u3084\u3059\u304f\u3057\u307e\u3059\u3002<\/p> <p>\u3053\u3046\u3057\u305f\u6df7\u5728\u74b0\u5883\u3067\u306f\u3001\u5358\u4e00\u306e\u8a00\u8a9e\u306b\u7cbe\u901a\u3057\u305f\u30a8\u30f3\u30b8\u30cb\u30a2\u3060\u3051\u3067\u5224\u65ad\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001OS \u30ec\u30d9\u30eb\u30fb\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u30ec\u30d9\u30eb\u3092\u542b\u3081\u3066\u4fef\u77b0\u3067\u304d\u308b\u5c02\u9580\u5bb6\u3068\u4e00\u7dd2\u306b\u8a2d\u8a08\u30fb\u30ec\u30d3\u30e5\u30fc\u3092\u884c\u3046\u3053\u3068\u304c\u3001\u5b89\u5168\u5074\u306b\u5012\u3059\u3046\u3048\u3067\u6709\u52b9\u3067\u3059\u3002\u682a\u5f0f\u4f1a\u793e\u60c5\u5831\u5de5\u5b66\u7814\u7a76\u6240\u3067\u306f\u3001\u30c7\u30fc\u30bf\u5fa9\u65e7\u3084\u30b5\u30fc\u30d0\u969c\u5bb3\u5bfe\u5fdc\u306e\u73fe\u5834\u7d4c\u9a13\u3092\u8e0f\u307e\u3048\u3066\u3001\u300c\u3069\u306e\u30ec\u30a4\u30e4\u304b\u3089\u8abf\u67fb\u30fb\u6539\u5584\u306b\u7740\u624b\u3059\u308b\u306e\u304c\u3082\u3063\u3068\u3082\u5408\u7406\u7684\u304b\u300d\u3068\u3044\u3063\u305f\u89b3\u70b9\u3067\u306e\u76f8\u8ac7\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p> <p>EBADF \u3084 FD \u5468\u308a\u306e\u554f\u984c\u304c\u6c17\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u307e\u305a\u306f\u5c0f\u3055\u306a\u7bc4\u56f2\uff081\u30b5\u30fc\u30d3\u30b9\u30841\u30b7\u30b9\u30c6\u30e0\uff09\u304b\u3089\u3067\u3082\u69cb\u3044\u307e\u305b\u3093\u3002\u5177\u4f53\u7684\u306a\u30ed\u30b0\u3084\u69cb\u6210\u60c5\u5831\u3092\u30d9\u30fc\u30b9\u306b\u3001\u4e00\u7dd2\u306b\u6574\u7406\u3092\u9032\u3081\u3066\u3044\u304f\u3053\u3068\u3067\u3001\u518d\u8d77\u52d5\u983c\u307f\u3067\u306f\u306a\u3044\u5b89\u5b9a\u904b\u7528\u3078\u306e\u4e00\u6b69\u3092\u8e0f\u307f\u51fa\u305b\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n\n\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-90f0380 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"90f0380\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-800d1c2\" data-id=\"800d1c2\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-20781e91 elementor-widget elementor-widget-text-editor\" data-id=\"20781e91\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<style>h1.dai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin-top: 25px; \/* \u4e0a\u306e\u7a7a\u767d\u30922\u500d *\/    margin-bottom: 5px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}h2.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin-top: 25px; \/* \u4e0a\u306e\u7a7a\u767d\u30922\u500d *\/    margin-bottom: 5px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin: 0 auto 50px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}.fukudai {    display: inline-block;    font-weight: bold;    border-left: solid 5px #38b3f2;    border-bottom: solid 1px #38b3f2;    margin: 0 auto 50px;    padding: 5px 5px 5px 5px;    font-size: 18px; \/* \u6587\u5b57\u306e\u5927\u304d\u3055\u309218px\u306b\u8a2d\u5b9a *\/}<\/style><h2 class='fukudai'>\u306f\u3058\u3081\u306b<\/h2><br><p>     CentOS\u3092\u306f\u3058\u3081\u3068\u3059\u308bLinux\u7cfbOS\u306e\u904b\u7528\u7ba1\u7406\u306b\u304a\u3044\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u30a8\u30e9\u30fc\u306f\u907f\u3051\u3066\u901a\u308c\u306a\u3044\u8ab2\u984c\u306e\u4e00\u3064\u3067\u3059\u3002\u7279\u306b\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u6b63\u5e38\u306a\u52d5\u4f5c\u3092\u59a8\u3052\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u505c\u6b62\u3084\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9\u306e\u9045\u5ef6\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30a8\u30e9\u30fc\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u4f7f\u7528\u53ef\u80fd\u306a\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u6570\u3092\u8d85\u3048\u305f\u5834\u5408\u3084\u3001\u9069\u5207\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u3066\u3044\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u304c\u6b8b\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u3084IT\u90e8\u9580\u306e\u65b9\u3005\u306f\u3001\u3053\u306e\u554f\u984c\u306b\u5bfe\u3057\u3066\u8fc5\u901f\u304b\u3064\u6b63\u78ba\u306a\u5bfe\u5fdc\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u73fe\u72b6\u306e\u7406\u89e3\u3068\u3068\u3082\u306b\u3001\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3001\u5177\u4f53\u7684\u306a\u4e8b\u4f8b\u3001\u305d\u3057\u3066\u5b9f\u8df5\u7684\u306a\u518d\u8a2d\u5b9a\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002\u5b89\u5fc3\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u904b\u7528\u3092\u7d9a\u3051\u308b\u305f\u3081\u306b\u3001\u6b63\u3057\u3044\u5bfe\u7b56\u3092\u8eab\u306b\u3064\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u30c7\u30fc\u30bf\u5fa9\u65e7\u306e\u5c02\u9580\u5bb6\u3068\u3057\u3066\u3001\u591a\u304f\u306e\u969c\u5bb3\u4e8b\u4f8b\u306b\u5bfe\u5fdc\u3057\u3066\u304d\u305f\u7d4c\u9a13\u304b\u3089\u3001\u78ba\u5b9f\u306a\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u904b\u7528\u306b\u5bc4\u4e0e\u3067\u304d\u308b\u60c5\u5831\u3092\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/p><br><br><p>\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3084\u30b7\u30b9\u30c6\u30e0\u304c\u30d5\u30a1\u30a4\u30eb\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bd\u30b1\u30c3\u30c8\u306a\u3069\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u8b58\u5225\u5b50\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u306e\u7bc4\u56f2\u5185\u3067\u4f7f\u7528\u3055\u308c\u3001\u9069\u5207\u306b\u7ba1\u7406\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u7279\u306b\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u65e2\u306b\u30af\u30ed\u30fc\u30ba\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u3084\u7121\u52b9\u306a\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u904e\u5270\u306a\u6d88\u8cbb\u3084\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d0\u30b0\u3001\u307e\u305f\u306f\u8a2d\u5b9a\u306e\u4e0d\u5099\u306b\u3088\u308b\u3082\u306e\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u9577\u6642\u9593\u7a3c\u50cd\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\u3084\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u306e\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306b\u554f\u984c\u306e\u3042\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u306e\u30a8\u30e9\u30fc\u304c\u983b\u7e41\u306b\u898b\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u539f\u56e0\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u9069\u5207\u306a\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u7279\u306b\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30ea\u30bd\u30fc\u30b9\u5236\u9650\u3092\u8d85\u3048\u3066\u3057\u307e\u3046\u3068\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306e\u5b89\u5b9a\u6027\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u305f\u3081\u3001\u7ba1\u7406\u8005\u306f\u5b9a\u671f\u7684\u306a\u30ea\u30bd\u30fc\u30b9\u76e3\u8996\u3068\u9069\u5207\u306a\u8a2d\u5b9a\u8abf\u6574\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u57fa\u672c\u7684\u306a\u5f79\u5272\u3068\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u6839\u672c\u7684\u306a\u539f\u56e0\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p><br><br><p>\u8a73\u7d30\u306a\u4e8b\u4f8b\u3084\u5bfe\u5fdc\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u306e\u73fe\u5834\u3067\u306f\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306b\u3001\u539f\u56e0\u306e\u7279\u5b9a\u3068\u8fc5\u901f\u306a\u5bfe\u5fdc\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u9577\u6642\u9593\u7a3c\u50cd\u3057\u3066\u3044\u308bWeb\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3084\u30bd\u30b1\u30c3\u30c8\u306e\u9069\u5207\u306a\u30af\u30ed\u30fc\u30ba\u51e6\u7406\u304c\u884c\u308f\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u67af\u6e07\u3084\u7121\u52b9\u306a\u30cf\u30f3\u30c9\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u539f\u56e0\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001\u307e\u305a\u30b7\u30b9\u30c6\u30e0\u306e\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u3084\u30b5\u30fc\u30d3\u30b9\u304c\u904e\u5270\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u6d88\u8cbb\u3057\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u8a72\u5f53\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u306e\u518d\u8d77\u52d5\u3084\u3001\u4e0d\u8981\u306a\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u306e\u89e3\u653e\u3092\u884c\u3046\u3053\u3068\u304c\u4e00\u822c\u7684\u306a\u5bfe\u5fdc\u3067\u3059\u3002\u307e\u305f\u3001\u8a2d\u5b9a\u306e\u898b\u76f4\u3057\u3082\u91cd\u8981\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u4e0a\u9650\u3092\u5f15\u304d\u4e0a\u3052\u308b\u3053\u3068\u3067\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u67af\u6e07\u3092\u9632\u3050\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u4e0a\u9650\u3092\u5897\u3084\u3059\u3060\u3051\u3067\u306f\u6839\u672c\u7684\u306a\u89e3\u6c7a\u306b\u306a\u3089\u306a\u3044\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u6839\u672c\u539f\u56e0\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30ed\u30b0\u306e\u5206\u6790\u3084\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3082\u6709\u52b9\u3067\u3059\u3002\u7279\u306b\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u306e\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u304c\u9069\u5207\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4fee\u6b63\u3092\u884c\u3046\u3053\u3068\u304c\u3001\u9577\u671f\u7684\u306a\u5b89\u5b9a\u904b\u7528\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u5b9a\u671f\u7684\u306a\u76e3\u8996\u3068\u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u5fb9\u5e95\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u3053\u308c\u3089\u306e\u5bfe\u5fdc\u7b56\u3092\u5b9f\u8df5\u3057\u3001\u30a8\u30e9\u30fc\u306e\u518d\u767a\u3092\u9632\u3050\u3053\u3068\u304c\u3001\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u306e\u91cd\u8981\u306a\u5f79\u5272\u3068\u306a\u308a\u307e\u3059\u3002<\/p><br><br><p>\u30b7\u30b9\u30c6\u30e0\u306e\u73fe\u5834\u3067\u306f\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u304c\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u30b1\u30fc\u30b9\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306b\u3001\u3088\u308a\u8a73\u7d30\u306a\u8a3a\u65ad\u3068\u5bfe\u7b56\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u307e\u305a\u30b7\u30b9\u30c6\u30e0\u30ed\u30b0\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30ed\u30b0\u3092\u8a73\u7d30\u306b\u89e3\u6790\u3057\u3001\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3084\u72b6\u6cc1\u3092\u628a\u63e1\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u3069\u306e\u30ea\u30bd\u30fc\u30b9\u3084\u30d7\u30ed\u30bb\u30b9\u304c\u554f\u984c\u306e\u6839\u6e90\u3068\u306a\u3063\u3066\u3044\u308b\u304b\u3092\u7279\u5b9a\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002  \u6b21\u306b\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u76e3\u8996\u30c4\u30fc\u30eb\u3084\u30b7\u30b9\u30c6\u30e0\u30b3\u30de\u30f3\u30c9\u3092\u6d3b\u7528\u3057\u3066\u3001\u73fe\u5728\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001`lsof`\u30b3\u30de\u30f3\u30c9\u3084`ulimit`\u8a2d\u5b9a\u3092\u7528\u3044\u3066\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u591a\u304f\u306e\u30cf\u30f3\u30c9\u30eb\u3092\u5360\u6709\u3057\u3066\u3044\u308b\u304b\u3092\u628a\u63e1\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u60c5\u5831\u3092\u3082\u3068\u306b\u3001\u4e0d\u8981\u306a\u30d7\u30ed\u30bb\u30b9\u306e\u505c\u6b62\u3084\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u904e\u5270\u306a\u6d88\u8cbb\u3092\u6291\u5236\u3059\u308b\u305f\u3081\u306e\u8a2d\u5b9a\u5909\u66f4\u3092\u884c\u3044\u307e\u3059\u3002  \u307e\u305f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u4e0a\u9650\u5024\u3092\u9069\u5207\u306b\u8abf\u6574\u3059\u308b\u3053\u3068\u3082\u52b9\u679c\u7684\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u4e0a\u9650\u5024\u306e\u5f15\u304d\u4e0a\u3052\u306f\u6839\u672c\u7684\u306a\u89e3\u6c7a\u7b56\u3067\u306f\u306a\u304f\u3001\u4e00\u6642\u7684\u306a\u5bfe\u7b56\u306b\u3068\u3069\u3081\u308b\u3079\u304d\u3067\u3059\u3002\u6839\u672c\u7684\u306a\u89e3\u6c7a\u306b\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3068\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u6539\u5584\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u3084\u30bd\u30b1\u30c3\u30c8\u3092\u4f7f\u7528\u5f8c\u306b\u5fc5\u305a\u30af\u30ed\u30fc\u30ba\u3059\u308b\u3053\u3068\u3001\u4f8b\u5916\u51e6\u7406\u3092\u9069\u5207\u306b\u884c\u3046\u3053\u3068\u3001\u305d\u3057\u3066\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u3092\u9632\u3050\u8a2d\u8a08\u306b\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002  \u3055\u3089\u306b\u3001\u5b9a\u671f\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3084\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3082\u3001\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u6700\u9069\u5316\u306b\u5bc4\u4e0e\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u53d6\u308a\u7d44\u307f\u3092\u7d99\u7d9a\u7684\u306b\u884c\u3046\u3053\u3068\u3067\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u767a\u751f\u983b\u5ea6\u3092\u6291\u3048\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u6027\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u3084\u904b\u7528\u62c5\u5f53\u8005\u306f\u3001\u3053\u308c\u3089\u306e\u8a73\u7d30\u306a\u5bfe\u7b56\u3092\u5b9f\u8df5\u3057\u3001\u30a8\u30e9\u30fc\u306e\u6839\u7d76\u3068\u30b7\u30b9\u30c6\u30e0\u306e\u4fe1\u983c\u6027\u5411\u4e0a\u306b\u52aa\u3081\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002   \u203b\u5f53\u793e\u306f\u3001\u7d30\u5fc3\u306e\u6ce8\u610f\u3092\u6255\u3063\u3066\u5f53\u793e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u60c5\u5831\u3092\u63b2\u8f09\u3057\u3066\u304a\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u60c5\u5831\u306e\u6b63\u78ba\u6027\u304a\u3088\u3073\u5b8c\u5168\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u5f53\u793e\u306f\u4e88\u544a\u306a\u3057\u306b\u3001\u5f53\u793e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u63b2\u8f09\u3055\u308c\u3066\u3044\u308b\u60c5\u5831\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5f53\u793e\u304a\u3088\u3073\u305d\u306e\u95a2\u9023\u4f1a\u793e\u306f\u3001\u304a\u5ba2\u3055\u307e\u304c\u5f53\u793e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u542b\u307e\u308c\u308b\u60c5\u5831\u3082\u3057\u304f\u306f\u5185\u5bb9\u3092\u3054\u5229\u7528\u3055\u308c\u305f\u3053\u3068\u3067\u76f4\u63a5\u30fb\u9593\u63a5\u7684\u306b\u751f\u3058\u305f\u640d\u5931\u306b\u95a2\u3057\u4e00\u5207\u8cac\u4efb\u3092\u8ca0\u3046\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p><br><br><p>\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u904b\u7528\u306b\u304a\u3044\u3066\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u6839\u672c\u7684\u306a\u89e3\u6c7a\u306b\u306f\u3001\u7d99\u7d9a\u7684\u306a\u76e3\u8996\u3068\u9069\u5207\u306a\u8a2d\u5b9a\u306e\u898b\u76f4\u3057\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u307e\u305a\u3001\u5b9a\u671f\u7684\u306a\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u72b6\u6cc1\u306e\u628a\u63e1\u304c\u91cd\u8981\u3067\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u30b3\u30de\u30f3\u30c9\u3084\u76e3\u8996\u30c4\u30fc\u30eb\u3092\u6d3b\u7528\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u6d88\u8cbb\u72b6\u6cc1\u3084\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u904e\u5270\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u6d88\u8cbb\u3057\u3066\u3044\u308b\u304b\u3092\u628a\u63e1\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u7570\u5e38\u306a\u30ea\u30bd\u30fc\u30b9\u6d88\u8cbb\u3092\u65e9\u671f\u306b\u767a\u898b\u3057\u3001\u9069\u5207\u306a\u5bfe\u5fdc\u3092\u53d6\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002 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\u307e\u305f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u5b9a\u8abf\u6574\u3082\u52b9\u679c\u7684\u3067\u3059\u3002`ulimit`\u30b3\u30de\u30f3\u30c9\u3084\u30b7\u30b9\u30c6\u30e0\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u5229\u7528\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf\u306e\u4e0a\u9650\u5024\u3092\u9069\u5207\u306b\u5f15\u304d\u4e0a\u3052\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u3060\u3051\u3067\u306f\u6839\u672c\u7684\u306a\u89e3\u6c7a\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u6839\u672c\u89e3\u6c7a\u306b\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u8a08\u6539\u5584\u3084\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u7ba1\u7406\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002  \u3055\u3089\u306b\u3001\u5b9a\u671f\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3068\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3082\u91cd\u8981\u3067\u3059\u3002\u6700\u65b0\u306e\u30d1\u30c3\u30c1\u3084\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u9069\u7528\u3057\u3001\u65e2\u77e5\u306e\u30d0\u30b0\u3084\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u306e\u4fee\u6b63\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u306e\u518d\u767a\u9632\u6b62\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u53d6\u308a\u7d44\u307f\u3092\u7d99\u7d9a\u7684\u306b\u5b9f\u65bd\u3059\u308b\u3053\u3068\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4fe1\u983c\u6027\u3068\u5b89\u5b9a\u6027\u3092\u9ad8\u3081\u3001\u300cBad file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u767a\u751f\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u3084\u904b\u7528\u62c5\u5f53\u8005\u306f\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u3068\u7d99\u7d9a\u7684\u306a\u6539\u5584\u3092\u5fc3\u304c\u3051\u308b\u3053\u3068\u304c\u3001\u9577\u671f\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u306e\u5065\u5168\u6027\u7dad\u6301\u306b\u5bc4\u4e0e\u3057\u307e\u3059\u3002   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file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u767a\u751f\u983b\u5ea6\u3092\u6291\u3048\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4fe1\u983c\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u3084\u904b\u7528\u62c5\u5f53\u8005\u306f\u3001\u65e5\u3005\u306e\u76e3\u8996\u3068\u6539\u5584\u3092\u7d99\u7d9a\u3057\u3001\u5b89\u5b9a\u3057\u305f\u30b7\u30b9\u30c6\u30e0\u904b\u7528\u3092\u652f\u3048\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p><br><br><p>\u672c\u8a18\u4e8b\u3067\u306f\u3001CentOS\u3092\u306f\u3058\u3081\u3068\u3059\u308bLinux\u7cfb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u983b\u7e41\u306b\u767a\u751f\u3059\u308b\u300cBad file 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file descriptor\u300d\u30a8\u30e9\u30fc\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u5065\u5168\u306a\u904b\u7528\u3092\u7dad\u6301\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p><br><br><p>\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u904b\u7528\u3092\u7d99\u7d9a\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u5b9a\u671f\u7684\u306a\u76e3\u8996\u3068\u9069\u5207\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u304c\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u4eca\u56de\u3054\u7d39\u4ecb\u3057\u305f\u5bfe\u7b56\u3084\u624b\u6cd5\u306f\u3001\u3059\u3050\u306b\u5b9f\u8df5\u3067\u304d\u308b\u5185\u5bb9\u3082\u591a\u304f\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3082\u3057\u3001\u3054\u81ea\u8eab\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u300cBad file 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