{"id":1215,"date":"2026-10-24T02:00:00","date_gmt":"2026-10-23T17:00:00","guid":{"rendered":"https:\/\/quantumsea.net\/?p=1215"},"modified":"2026-10-22T20:42:07","modified_gmt":"2026-10-22T11:42:07","slug":"qs-linux-close-error-fd-reuse-20261022","status":"publish","type":"post","link":"https:\/\/quantumsea.net\/?p=1215","title":{"rendered":"Linux\u306eclose\u3001\u30a8\u30e9\u30fc\u5f8c\u306e\u518d\u8a66\u884c\u304c\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308b\u7406\u7531"},"content":{"rendered":"<p>\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308bclose\u304c\u30a8\u30e9\u30fc\u3092\u8fd4\u3057\u305f\u3089\u3001\u6210\u529f\u3059\u308b\u307e\u3067\u7e70\u308a\u8fd4\u305b\u3070\u3088\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002Linux\u3067\u306f\u3001\u305d\u306e\u518d\u8a66\u884c\u304c\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u521d\u306e\u547c\u3073\u51fa\u3057\u304c\u3001\u30a8\u30e9\u30fc\u3092\u5831\u544a\u3059\u308b\u3088\u308a\u524d\u306b\u3001\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u306e\u756a\u53f7\u3092\u89e3\u653e\u3057\u3066\u3044\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u5206\u3051\u305f\u3044\u306e\u306f\u3001<strong>\u756a\u53f7\u304c\u5229\u7528\u53ef\u80fd\u306b\u306a\u3063\u305f\u3053\u3068<\/strong>\u3068\u3001<strong>\u66f8\u304d\u8fbc\u307f\u306a\u3069\u306e\u5f8c\u51e6\u7406\u304c\u554f\u984c\u306a\u304f\u7d42\u308f\u3063\u305f\u3053\u3068<\/strong>\u3067\u3059\u3002\u540c\u3058\u6574\u6570\u304c\u624b\u5143\u306b\u6b8b\u3063\u3066\u3044\u3066\u3082\u3001\u6b21\u306b\u540c\u3058\u5bfe\u8c61\u3092\u6307\u3059\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002Linux man-pages 6.19\u306eclose(2)\u3092\u57fa\u306b\u3001\u30a8\u30e9\u30fc\u306e\u610f\u5473\u3068\u518d\u8a66\u884c\u306e\u5371\u967a\u3092\u8ffd\u3044\u307e\u3059\u3002[1]<\/p>\n<section class=\"influvetor-quick-summary\" aria-label=\"\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f\">\n<p><strong>\u7c21\u5358\u306b\u307e\u3068\u3081\u308b\u3068\uff1f<\/strong><\/p>\n<ul>\n<li>Linux\u306eclose\u306f\u3001\u51e6\u7406\u306e\u65e9\u3044\u6bb5\u968e\u3067\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u3092\u89e3\u653e\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u306b\u30a8\u30e9\u30fc\u3092\u8fd4\u3057\u3066\u3082\u3001\u540c\u3058\u756a\u53f7\u306f\u3059\u3067\u306b\u5225\u306e\u7528\u9014\u3078\u518d\u5229\u7528\u3055\u308c\u5f97\u307e\u3059\u3002<\/li>\n<li>\u30a8\u30e9\u30fc\u3092\u7121\u8996\u3057\u3066\u3088\u3044\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u66f8\u304d\u8fbc\u307f\u5931\u6557\u304cclose\u3067\u521d\u3081\u3066\u5206\u304b\u308b\u5834\u5408\u304c\u3042\u308b\u305f\u3081\u3001\u8a3a\u65ad\u3068\u30c7\u30fc\u30bf\u4fdd\u5168\u306e\u5bfe\u5fdc\u3092\u884c\u3044\u3001\u540c\u3058\u756a\u53f7\u3078\u306eclose\u306e\u518d\u9001\u3068\u306f\u5206\u3051\u307e\u3059\u3002<\/li>\n<li>\u30b7\u30b0\u30ca\u30eb\u5272\u8fbc\u307fEINTR\u306e\u6271\u3044\u306f\u3001Linux\u306e\u5b9f\u88c5\u3068POSIX.1-2024\u306e\u898f\u5b9a\u3092\u533a\u5225\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u300cEINTR\u306a\u3089\u518d\u8a66\u884c\u300d\u3092close\u3078\u7121\u6761\u4ef6\u306b\u9069\u7528\u3057\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/section>\n<h2>\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u306f\u3001\u5bfe\u8c61\u305d\u306e\u3082\u306e\u3067\u306f\u306a\u304f\u756a\u53f7<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u3001file descriptor\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u958b\u3044\u305f\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u3092\u53c2\u7167\u3059\u308b\u3068\u304d\u306b\u4f7f\u3046\u5c0f\u3055\u306a\u6574\u6570\u3067\u3059\u3002\u4f8b\u3048\u30703\u756a\u304c\u3042\u308b\u30d5\u30a1\u30a4\u30ebA\u3092\u6307\u3057\u3066\u3044\u3066\u3082\u30013\u3068\u3044\u3046\u5024\u304c\u6c38\u4e45\u306bA\u3078\u7d50\u3073\u4ed8\u3044\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002close\u3067\u89e3\u653e\u3057\u305f\u5f8c\u306f\u3001\u5225\u306e\u30d5\u30a1\u30a4\u30ebB\u3092\u958b\u304f\u64cd\u4f5c\u304c\u540c\u30583\u756a\u3092\u4f7f\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002[1\u3001DESCRIPTION]<\/p>\n<p>\u307e\u305f\u3001\u8a18\u8ff0\u5b50\u3068\u3001\u305d\u306e\u4e0b\u3067\u4fdd\u6301\u3055\u308c\u308b\u300c\u958b\u304b\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306e\u72b6\u614b\u300d\u306f\u5225\u3067\u3059\u3002\u8907\u88fd\u3055\u308c\u305f\u8a18\u8ff0\u5b50\u306a\u3069\u304c\u540c\u3058\u72b6\u614b\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u4e00\u3064\u306e\u756a\u53f7\u3092\u9589\u3058\u3066\u3082\u3001\u305d\u306e\u72b6\u614b\u3078\u306e\u53c2\u7167\u304c\u3059\u3079\u3066\u306a\u304f\u306a\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002close\u306e\u623b\u308a\u5024\u304b\u3089\u3001\u307b\u304b\u306e\u53c2\u7167\u3084\u9032\u884c\u4e2d\u306e\u51e6\u7406\u307e\u3067\u4e00\u62ec\u3057\u3066\u6d88\u3048\u305f\u3068\u89e3\u91c8\u3057\u306a\u3044\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h2>\u756a\u53f7\u3092\u89e3\u653e\u3057\u3066\u304b\u3089\u3001\u30a8\u30e9\u30fc\u304c\u5206\u304b\u308b\u3053\u3068\u304c\u3042\u308b<\/h2>\n<p>Linux\u306e\u8aac\u660e\u3067\u91cd\u8981\u306a\u306e\u306f\u3001close\u306e\u5185\u90e8\u306e\u9806\u5e8f\u3067\u3059\u3002\u30ab\u30fc\u30cd\u30eb\u306f\u65e9\u3044\u6bb5\u968e\u3067\u8a18\u8ff0\u5b50\u3092\u89e3\u653e\u3057\u3001\u518d\u5229\u7528\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3084\u88c5\u7f6e\u3078\u306e\u66f8\u304d\u51fa\u3057\u306a\u3069\u3001\u30a8\u30e9\u30fc\u3092\u751f\u3058\u5f97\u308b\u51e6\u7406\u304c\u7d9a\u304d\u307e\u3059\u3002[1\u3001Dealing with error returns from close()]<\/p>\n<p>\u3064\u307e\u308a\u3001\u623b\u308a\u5024\u304c\u22121\u3060\u3063\u305f\u3053\u3068\u3060\u3051\u3067\u306f\u3001\u300c\u307e\u3060\u305d\u306e\u756a\u53f7\u304c\u5143\u306e\u5bfe\u8c61\u3092\u6307\u3057\u3066\u3044\u308b\u300d\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002\u6700\u521d\u304b\u3089\u756a\u53f7\u304c\u7121\u52b9\u3060\u3063\u305fEBADF\u3068\u3001\u6709\u52b9\u306a\u756a\u53f7\u3092\u89e3\u653e\u3057\u305f\u5f8c\u3067\u5831\u544a\u3055\u308c\u305f\u30a8\u30e9\u30fc\u306f\u3001\u540c\u3058\u72b6\u614b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30a8\u30e9\u30fc\u756a\u53f7\u3092\u6b8b\u3057\u3001\u3069\u306e\u6bb5\u968e\u306e\u554f\u984c\u304b\u3092\u8abf\u3079\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u7279\u306b\u3001\u4ee5\u524d\u306ewrite\u3067\u53d7\u3051\u4ed8\u3051\u305f\u30c7\u30fc\u30bf\u306b\u3064\u3044\u3066\u3001\u5f8c\u306eclose\u3067\u66f8\u304d\u8fbc\u307f\u5931\u6557\u304c\u5831\u544a\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u8cc7\u6599\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3084\u5bb9\u91cf\u5236\u9650\u306e\u4f8b\u3092\u6319\u3052\u3066\u3044\u307e\u3059\u3002[1] write\u304c\u4e00\u5ea6\u6210\u529f\u3057\u305f\u304b\u3089\u3001\u6700\u5f8c\u306eclose\u306e\u7d50\u679c\u306f\u898b\u306a\u304f\u3066\u3088\u3044\u3001\u3068\u3044\u3046\u3053\u3068\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>\u540c\u30583\u756a\u3078\u306e\u518d\u8a66\u884c\u304c\u3001B\u3092\u9589\u3058\u308b\u6d41\u308c<\/h2>\n<p>\u4e8c\u3064\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u540c\u3058\u30d7\u30ed\u30bb\u30b9\u5185\u3067\u52d5\u304f\u3001\u6b21\u306e\u9806\u5e8f\u3092\u8003\u3048\u307e\u3059\u3002\u6700\u521d\u3001\u8a18\u8ff0\u5b503\u306fA\u3092\u6307\u3057\u3066\u3044\u307e\u3059\u3002\u30b9\u30ec\u30c3\u30c91\u304cclose(3)\u3092\u547c\u3073\u3001\u30ab\u30fc\u30cd\u30eb\u306f3\u756a\u3092\u89e3\u653e\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u30b9\u30ec\u30c3\u30c92\u304cB\u3092\u958b\u304d\u3001\u7a7a\u3044\u305f3\u756a\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002\u7d9a\u3044\u3066\u30b9\u30ec\u30c3\u30c91\u3078\u3001\u6700\u521d\u306eclose\u306e\u30a8\u30e9\u30fc\u304c\u8fd4\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u30b9\u30ec\u30c3\u30c91\u304c\u300c\u5931\u6557\u3057\u305f\u306e\u3067\u518d\u8a66\u884c\u300d\u3068close(3)\u3092\u3082\u3046\u4e00\u5ea6\u547c\u3076\u3068\u3001\u73fe\u57283\u756a\u3092\u4f7f\u3063\u3066\u3044\u308bB\u3092\u9589\u3058\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u306e\u4e8c\u56de\u76ee\u306f\u3001A\u306b\u5bfe\u3059\u308b\u6700\u521d\u306e\u51e6\u7406\u3092\u518d\u958b\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6574\u65703\u3092\u305d\u306e\u6642\u70b9\u3067\u89e3\u91c8\u3059\u308b\u3001\u65b0\u3057\u3044\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-linux-close-error-fd-reuse-20261022-figure-b9da70127f99.png\" style=\"max-width:100%;height:auto\" alt=\"\u8a18\u8ff0\u5b503\u306f\u6700\u521dA\u3092\u6307\u3059\u3002\u6700\u521d\u306eclose\u3067\u756a\u53f7\u304c\u7a7a\u304d\u3001\u5225\u306e\u30b9\u30ec\u30c3\u30c9\u304cB\u30783\u3092\u5272\u308a\u5f53\u3066\u308b\u3002\u53e4\u3044\u51e6\u7406\u304cclose\u306e\u30a8\u30e9\u30fc\u3092\u898b\u3066\u540c\u30583\u3092\u518d\u5ea6\u9589\u3058\u308b\u3068B\u304c\u9589\u3058\u3089\u308c\u308b\u3002\"><figcaption>Linux\u306e\u8aac\u660e\u306b\u6cbf\u3063\u3066\u3001\u518d\u5229\u7528\u304c\u8d77\u304d\u308b\u4e00\u3064\u306e\u9806\u5e8f\u3092\u8868\u3057\u305f\u72ec\u81ea\u30e2\u30c7\u30eb\u3002\u5b9f\u6a5f\u3067\u30a8\u30e9\u30fc\u3092\u6ce8\u5165\u3057\u305f\u6e2c\u5b9a\u3067\u306f\u306a\u304f\u3001\u3059\u3079\u3066\u306eclose\u3067\u3053\u306e\u9806\u5e8f\u306b\u306a\u308b\u3068\u3044\u3046\u56f3\u3067\u3082\u3042\u308a\u307e\u305b\u3093\u3002<\/figcaption><\/figure>\n<p>\u4eca\u56de\u306e\u72ec\u81ea\u30e2\u30c7\u30eb\u3067\u306f\u3001\u756a\u53f7\u8868\u3092A\u2192\u7a7a\u304d\u2192B\u3068\u66f4\u65b0\u3057\u3001\u53e4\u3044\u51e6\u7406\u304c\u6301\u3064\u300c3\u300d\u3068\u3044\u3046\u5024\u304b\u3089\u4e8c\u56de\u76ee\u306e\u5bfe\u8c61\u3092\u89e3\u6c7a\u3059\u308b\u3068B\u306b\u306a\u308b\u3053\u3068\u3092\u78ba\u304b\u3081\u307e\u3057\u305f\u3002\u30e2\u30c7\u30eb\u304c\u793a\u3059\u306e\u306f\u3001\u756a\u53f7\u306e\u518d\u5229\u7528\u3092\u8a31\u3059\u6761\u4ef6\u4e0b\u3067\u306e\u53cd\u4f8b\u3067\u3059\u3002\u518d\u5229\u7528\u306e\u983b\u5ea6\u3084\u3001\u7af6\u5408\u304c\u767a\u751f\u3059\u308b\u6642\u9593\u5e45\u3092\u6e2c\u3063\u305f\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u554f\u984c\u3092\u9632\u3050\u306b\u306f\u3001\u3069\u306e\u51e6\u7406\u304c\u8a18\u8ff0\u5b50\u306e\u7d42\u4e86\u3092\u62c5\u5f53\u3059\u308b\u304b\u3001\u3044\u3064\u307b\u304b\u306e\u51e6\u7406\u304b\u3089\u4f7f\u3048\u306a\u304f\u3059\u308b\u304b\u3092\u6c7a\u3081\u307e\u3059\u3002\u4e00\u3064\u306e\u5909\u6570\u3078\u7121\u52b9\u5024\u3092\u4ee3\u5165\u3059\u308b\u3060\u3051\u3067\u306f\u3001\u5225\u306e\u5909\u6570\u3084\u5225\u306e\u30b9\u30ec\u30c3\u30c9\u304c\u4fdd\u6301\u3059\u308b\u53e4\u3044\u30b3\u30d4\u30fc\u307e\u3067\u66f4\u65b0\u3055\u308c\u307e\u305b\u3093\u3002\u6240\u6709\u6a29\u3068\u5bff\u547d\u306e\u7ba1\u7406\u304c\u5fc5\u8981\u3067\u3001\u5358\u306a\u308b\u518d\u8a66\u884c\u56de\u6570\u306e\u5236\u9650\u3067\u306f\u89e3\u6c7a\u3057\u307e\u305b\u3093\u3002<\/p>\n<h2>EINTR\u3068\u3044\u3046\u540d\u524d\u3060\u3051\u3067\u3001\u51e6\u7406\u3092\u5171\u901a\u5316\u3057\u306a\u3044<\/h2>\n<p>EINTR\u306f\u30b7\u30b0\u30ca\u30eb\u306b\u3088\u308b\u5272\u8fbc\u307f\u3092\u793a\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u300c\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u304cEINTR\u3092\u8fd4\u3057\u305f\u3089\u540c\u3058\u5f15\u6570\u3067\u518d\u8a66\u884c\u3059\u308b\u300d\u3068\u3044\u3046\u5171\u901a\u51e6\u7406\u3092\u3001Linux\u306eclose\u3078\u7121\u6761\u4ef6\u306b\u4f7f\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002Linux man-pages\u306f\u3001\u3053\u306e\u5834\u5408\u3082\u8a18\u8ff0\u5b50\u306f\u9589\u3058\u3089\u308c\u308b\u3068\u8aac\u660e\u3057\u3001\u30a8\u30e9\u30fc\u5f8c\u306eclose\u518d\u8a66\u884c\u3092\u907f\u3051\u308b\u3088\u3046\u6ce8\u610f\u3057\u3066\u3044\u307e\u3059\u3002[1]<\/p>\n<p>\u4e00\u65b9\u3001POSIX.1-2024\u306eclose\u306e\u898f\u5b9a\u3067\u306f\u3001EINTR\u3092\u8fd4\u3059\u5834\u5408\u306f\u8a18\u8ff0\u5b50\u304c\u958b\u3044\u305f\u307e\u307e\u3067\u3059\u3002\u9589\u3058\u305f\u5f8c\u3067\u51e6\u7406\u304c\u672a\u5b8c\u4e86\u306a\u3089EINPROGRESS\u3092\u8fd4\u3059\u5834\u5408\u3068\u533a\u5225\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001POSIX_CLOSE_RESTART\u306e\u5b9a\u7fa9\u306b\u3088\u308b\u6761\u4ef6\u3082\u3042\u308a\u307e\u3059\u3002[2\u3001DESCRIPTION] \u3053\u306e\u898f\u5b9a\u3092\u8aad\u3080\u3053\u3068\u3068\u3001Linux\u306e\u73fe\u884c\u8aac\u660e\u306b\u3042\u308b\u6319\u52d5\u3092\u8aad\u3080\u3053\u3068\u3092\u6df7\u305c\u308b\u3068\u3001\u518d\u8a66\u884c\u306e\u5224\u65ad\u304c\u9006\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u7a3f\u306e\u518d\u5229\u7528\u306e\u6ce8\u610f\u306fLinux\u3092\u5bfe\u8c61\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u4ed6\u306eOS\u3078\u79fb\u3059\u30b3\u30fc\u30c9\u3067\u306f\u3001\u5bfe\u8c61\u306e\u5b9f\u88c5\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306e\u5951\u7d04\u3001\u63a1\u7528\u3059\u308b\u898f\u683c\u306e\u7248\u3092\u78ba\u8a8d\u3057\u3066\u7d42\u4e86\u51e6\u7406\u3092\u5206\u3051\u307e\u3059\u3002\u898f\u683c\u306b\u95a2\u6570\u3084\u6761\u4ef6\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u3053\u3068\u3060\u3051\u3067\u3001\u305d\u306e\u95a2\u6570\u304c\u624b\u5143\u306eLinux\u74b0\u5883\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u3068\u306f\u6271\u3044\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u306f\u4e92\u63db\u30e9\u30c3\u30d1\u30fc\u306e\u5b9f\u88c5\u3084\u3001\u500b\u3005\u306e\u74b0\u5883\u3067\u306e\u9069\u5408\u8a66\u9a13\u307e\u3067\u306f\u884c\u3063\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<h2>\u30a8\u30e9\u30fc\u306e\u78ba\u8a8d\u3068\u3001\u7d42\u4e86\u306e\u518d\u5b9f\u884c\u3092\u5206\u3051\u308b<\/h2>\n<p>\u518d\u8a66\u884c\u3092\u907f\u3051\u308b\u3053\u3068\u306f\u3001\u30a8\u30e9\u30fc\u3092\u6368\u3066\u308b\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3069\u306e\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u3069\u306e\u66f8\u304d\u8fbc\u307f\u3067\u554f\u984c\u304c\u8d77\u304d\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3092\u3001\u8a18\u9332\u3068\u7167\u5408\u3057\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30c7\u30fc\u30bf\u3092\u5225\u306b\u4fdd\u5168\u3057\u76f4\u3059\u3001\u4e0a\u4f4d\u306e\u51e6\u7406\u3092\u5931\u6557\u3068\u3057\u3066\u8fd4\u3059\u306a\u3069\u306e\u5bfe\u5fdc\u3092\u691c\u8a0e\u3057\u307e\u3059\u3002\u30a8\u30e9\u30fc\u3092\u898b\u305f\u5f8c\u306e\u300c\u4f55\u3092\u56de\u5fa9\u3059\u308b\u304b\u300d\u306f\u3001\u5143\u306e\u756a\u53f7\u3092\u3082\u3046\u4e00\u5ea6\u9589\u3058\u308b\u8981\u6c42\u3068\u306f\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u3001close\u304c\u6210\u529f\u3057\u305f\u3053\u3068\u3082\u3001\u30c7\u30fc\u30bf\u304c\u6c38\u7d9a\u8a18\u61b6\u3078\u4fdd\u5b58\u3055\u308c\u305f\u8a3c\u660e\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u8cc7\u6599\u306f\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066close\u306e\u524d\u306bfsync\u3067\u66f8\u304d\u8fbc\u307f\u30a8\u30e9\u30fc\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3092\u6319\u3052\u3066\u3044\u307e\u3059\u3002[1] \u305f\u3060\u3057\u3001fsync\u306e\u6210\u529f\u6761\u4ef6\u3001\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u542b\u3080\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30fc\u306e\u4fdd\u5b58\u3001\u88c5\u7f6e\u306e\u6319\u52d5\u306f\u305d\u308c\u305e\u308c\u5225\u306b\u691c\u8a0e\u3059\u3079\u304d\u7bc4\u56f2\u3067\u3042\u308a\u3001\u672c\u7a3f\u3067\u306f\u5b8c\u5168\u306a\u969c\u5bb3\u5fa9\u65e7\u624b\u9806\u3092\u63d0\u793a\u3057\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u5225\u306e\u30b9\u30ec\u30c3\u30c9\u306e\u5165\u51fa\u529b\u3092\u6b62\u3081\u305f\u3044\u5834\u5408\u306b\u3082\u3001close\u3060\u3051\u3092\u4e2d\u65ad\u306e\u5408\u56f3\u3068\u8003\u3048\u308b\u3068\u898b\u843d\u3068\u3057\u304c\u3042\u308a\u307e\u3059\u3002Linux\u3067\u306f\u3001\u9032\u884c\u4e2d\u306e\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u5165\u51fa\u529b\u304c\u4e0b\u4f4d\u306e\u958b\u304b\u308c\u305f\u72b6\u614b\u3078\u306e\u53c2\u7167\u3092\u4fdd\u6301\u3057\u3001\u5225\u30b9\u30ec\u30c3\u30c9\u306eclose\u306e\u5f8c\u306b\u6210\u529f\u3057\u3066\u5b8c\u4e86\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002[1\u3001Multithreaded processes and close()] \u505c\u6b62\u306e\u901a\u77e5\u3001\u51e6\u7406\u306e\u5b8c\u4e86\u5f85\u3061\u3001\u6700\u5f8c\u306e\u89e3\u653e\u3092\u5354\u8abf\u3055\u305b\u308b\u8a2d\u8a08\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u7d42\u4e86\u51e6\u7406\u3092\u70b9\u691c\u3059\u308b\u3068\u304d\u306f\u3001\u623b\u308a\u5024\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u304b\u3060\u3051\u3067\u306a\u304f\u3001\u756a\u53f7\u3092\u8ab0\u304c\u6240\u6709\u3057\u3001\u518d\u5229\u7528\u5f8c\u306b\u53e4\u3044\u5024\u3092\u4f7f\u308f\u306a\u3044\u4ed5\u7d44\u307f\u304c\u3042\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u300c\u756a\u53f7\u306f\u89e3\u653e\u3055\u308c\u305f\u304b\u300d\u3068\u300c\u4fdd\u5b58\u3084\u5165\u51fa\u529b\u306f\u6210\u529f\u3057\u305f\u304b\u300d\u3092\u5225\u3005\u306b\u8ffd\u3046\u3053\u3068\u3067\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u5225\u306e\u5bfe\u8c61\u3092\u58ca\u3059\u4e8b\u614b\u3092\u907f\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u51fa\u5178<\/h2>\n<ul>\n<li>[1] <a href=\"https:\/\/man7.org\/linux\/man-pages\/man2\/close.2.html\">Linux man-pages 6.19 \u2014 close(2)<\/a>\uff08\u672c\u6587\u65e5\u4ed82026\u5e742\u67088\u65e5\u30012026\u5e7410\u670822\u65e5\u4fdd\u5b58\uff09\u3002DESCRIPTION\u3001CAVEATS\u306eMultithreaded processes and close()\u3001Dealing with error returns from close()\u3092\u53c2\u7167\u3002\u56f3\u3068\u756a\u53f7\u8868\u306e\u9077\u79fb\u306f\u72ec\u81ea\u30e2\u30c7\u30eb\u3067\u3059\u3002<\/li>\n<li>[2] <a href=\"https:\/\/pubs.opengroup.org\/onlinepubs\/9799919799\/functions\/close.html\">The Open Group Base Specifications Issue 8 \/ IEEE Std 1003.1-2024 \u2014 close, posix_close<\/a>\u3001DESCRIPTION\u3002EINTR\u3001EINPROGRESS\u3001POSIX_CLOSE_RESTART\u306e\u6761\u4ef6\u3092\u78ba\u8a8d\u3002\u898f\u683c\u306e\u8a18\u8ff0\u3068Linux\u306e\u5b9f\u88c5\u8aac\u660e\u3092\u533a\u5225\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u308bclose\u304c\u30a8\u30e9\u30fc\u3092\u8fd4\u3057\u305f\u3089\u3001\u6210\u529f\u3059\u308b\u307e\u3067\u7e70\u308a\u8fd4\u305b\u3070\u3088\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002Linux\u3067\u306f\u3001\u305d\u306e\u518d\u8a66\u884c\u304c\u5225\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u9589\u3058\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u521d\u306e\u547c\u3073\u51fa\u3057\u304c\u3001\u30a8\u30e9\u30fc\u3092\u5831\u544a\u3059\u308b\u3088\u308a\u524d\u306b\u3001\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u306e\u756a\u53f7 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1213,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":true,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":false,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[30],"tags":[244],"class_list":["post-1215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-computing","tag-linux"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/quantumsea.net\/wp-content\/uploads\/2026\/10\/qs-linux-close-error-fd-reuse-20261022-featured-18d0baafc695.png","_links":{"self":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1215"}],"version-history":[{"count":1,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1215\/revisions"}],"predecessor-version":[{"id":1216,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/posts\/1215\/revisions\/1216"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=\/wp\/v2\/media\/1213"}],"wp:attachment":[{"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantumsea.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}