{"id":4356,"date":"2015-01-19T01:04:26","date_gmt":"2015-01-18T16:04:26","guid":{"rendered":"http:\/\/todayssp.universal.jp\/today\/?p=4356"},"modified":"2015-01-19T01:04:26","modified_gmt":"2015-01-18T16:04:26","slug":"%e3%80%90%e4%bb%8a%e6%97%a5%e3%81%ae%e6%ad%b4%e5%8f%b2%e3%80%912038%e5%b9%b41%e6%9c%8819%e6%97%a5%e3%81%ae%e4%ba%8b%e3%80%90%e3%82%84%e3%82%84%e5%b0%82%e9%96%80%e7%9a%84%e3%80%91","status":"publish","type":"post","link":"https:\/\/todayssp.universal.jp\/today\/?p=4356","title":{"rendered":"\u3010\u4eca\u65e5\u306e\u6b74\u53f2\u30112038\u5e741\u670819\u65e5\u306e\u4e8b\u3010\u3084\u3084\u5c02\u9580\u7684\u3011"},"content":{"rendered":"<figure id=\"attachment_4358\" aria-describedby=\"caption-attachment-4358\" style=\"width: 400px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/todayssp.universal.jp\/today\/wp-content\/uploads\/2015\/01\/a2f0020eb9915ec8d39f40187e621a83.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/todayssp.universal.jp\/today\/wp-content\/uploads\/2015\/01\/a2f0020eb9915ec8d39f40187e621a83.gif\" alt=\"\u4e0a\u304b\u3089\u30012\u9032\u30fb\u5341\u9032\u30fb\u554f\u984c\u306e\u3042\u308b\u6642\u523b\u30fb\u6b63\u3057\u3044\u6642\u523b\u3002\uff08GIF\u30a2\u30cb\u30e1\uff093\u664214\u52067\u79d2\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u3067\u8ca0\u306e\u5024\u3068\u306a\u308a\u3001\u6642\u523b\u306b\u72c2\u3044\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\" width=\"400\" height=\"130\" class=\"size-full wp-image-4358\" \/><\/a><figcaption id=\"caption-attachment-4358\" class=\"wp-caption-text\">\u4e0a\u304b\u3089\u30012\u9032\u30fb\u5341\u9032\u30fb\u554f\u984c\u306e\u3042\u308b\u6642\u523b\u30fb\u6b63\u3057\u3044\u6642\u523b\u3002\uff08GIF\u30a2\u30cb\u30e1\uff093\u664214\u52067\u79d2\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u3067\u8ca0\u306e\u5024\u3068\u306a\u308a\u3001\u6642\u523b\u306b\u72c2\u3044\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/figcaption><\/figure>\n<h1 style=\"text-align: center;\"><strong>2038\u5e74\u554f\u984c<\/strong><\/h1>\n<p>2038\u5e74\u554f\u984c\u306f\u3001<span style=\"color: #ff0000;\"><strong>2038\u5e741\u670819\u65e53\u664214\u52067\u79d2<\/strong><\/span>\uff08UTC\u3001\u4ee5\u4e0b\u540c\u69d8\uff09\u3092\u904e\u304e\u308b\u3068\u3001<span style=\"color: #008080;\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u8aa4\u52d5\u4f5c\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3055\u308c\u308b\u5e74\u554f\u984c<\/span>\u3002<\/p>\n<p><span style=\"font-size: 18pt;\"><strong>\u7d4c\u7def<br \/><\/strong><\/span>\u6642\u523b\u306e\u8868\u73fe\u3068\u3057\u3066<strong><span style=\"color: #008080;\">\u300cUNIX\u6642\u9593\u300d\u300a1970\u5e741\u67081\u65e50\u66420\u52060\u79d2\u304b\u3089\u306e\u7d4c\u904e\u79d2\u6570\u300b<\/span><\/strong>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u7b49\u306e\u30b7\u30b9\u30c6\u30e0\u304c\u3042\u308b\u3002<\/p>\n<p>\u3053\u306e\u8d77\u70b9\u306e\u6642\u523b\u306f\u3001\u6700\u521d\u306bUNIX\u306b\u305d\u306e\u3088\u3046\u306a\u6a5f\u80fd\u304c\u5b9f\u88c5\u3055\u308c\u305f\u6642\u306b\u30ad\u30ea\u304c\u3088\u304b\u3063\u305f\u904e\u53bb\u306e\u6642\u523b\u3067\u3042\u308a\u3001<span style=\"color: #008080;\">\u305f\u307e\u305f\u307e\u305d\u3046\u6c7a\u3081\u305f\u3068\u3044\u3046\u3060\u3051<\/span>\u306e\u3082\u306e\u306b\u904e\u304e\u306a\u3044\u3002<\/p>\n<p>\u3053\u306e\u7d4c\u904e\u79d2\u6570\u3092\u8868\u73fe\u3059\u308b\u578b\u306f\u3001<span style=\"color: #008080;\">\u73fe\u5728\u306e\u6a19\u6e96\u3067\u306f\u3001\u300ctime_t\u578b\u300d<\/span>\u3067\u3042\u308b\u3002<\/p>\n<p>C\u8a00\u8a9e\u306e\u6a19\u6e96\u3067\u3042\u308b\u300cISO\/IEC 9899:1999\u300d\u3067\u306f\u3001time_t\u578b\u306e\u7bc4\u56f2\u3084\u7cbe\u5ea6\u306f\u3044\u305a\u308c\u3082\u5b9f\u88c5\u5b9a\u7fa9\u3068\u3057\u3066\u3044\u308b\u3002UNIX\u306e\u6a19\u6e96\uff08POSIX\uff09\u306b\u306f\u300cshall be integer or real-floating types.\u300d\u3068\u306e\u307f\u8a18\u8ff0\u304c\u3042\u308a\u3001\u30d3\u30c3\u30c8\u5e45\u306a\u3044\u3057\u5024\u306e\u7bc4\u56f2\u306b\u3064\u3044\u3066\u306f\u4f55\u3089\u306e\u5b9a\u3081\u3082\u7121\u3044\u3002<\/p>\n<p><span style=\"color: #008080;\">\u4f1d\u7d71\u7684\u306a\u5b9f\u88c5<\/span>\u3067\u306ftime_t\u3092int\u3068\u3057\u3001\u305d\u306eint\u306f\u7b26\u53f7\u3064\u304d<span style=\"color: #008080;\">32\u30d3\u30c3\u30c8<\/span>\u3067\u3042\u3063\u305f\u3002<\/p>\n<p>\u3053\u306e\u305f\u3081<strong><span style=\"color: #008080;\">\u6700\u5927\u5024\u306f (231 \u2212 1) = 2,147,483,647<\/span> <\/strong>\u3068\u306a\u308a\u3001\u53d6\u308a\u6271\u3048\u308b\u306e\u306f<span style=\"color: #008080;\"><strong>2,147,483,647\u79d2\uff08\u2252 68\u5e74\uff09<\/strong><\/span>\u307e\u3067\u306b\u9650\u3089\u308c\u3066\u3044\u305f\u3002<\/p>\n<p>\u3053\u308c\u3092\u524d\u63d0\u3068\u3057\u3066\u4f5c\u6210\u3055\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u30011970\u5e741\u67081\u65e50\u66420\u52060\u79d2\u304b\u3089<span style=\"color: #008080;\">2,147,483,647\u79d2\u3092\u7d4c\u904e<\/span>\u3057\u305f\u3001<strong><span style=\"color: #ff0000;\">2038\u5e741\u670819\u65e53\u664214\u52067\u79d2<\/span><\/strong>\uff08\u958f\u79d2\u3092\u8003\u616e\u3057\u306a\u3044\u5834\u5408\uff09\u3092\u904e\u304e\u308b\u3068\u3001\u3053\u306e\u5024\u304c\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3057\u3001\u8ca0\u3068\u6271\u308f\u308c\u308b\u305f\u3081\u3001<span style=\"color: #008080;\">\u6642\u523b\u3092\u6b63\u3057\u304f\u6271\u3048\u3066\u3044\u308b\u3053\u3068\u3092\u524d\u63d0\u3068\u3057\u305f\u30b3\u30fc\u30c9\u304c\u3042\u308c\u3070\u3001\u8aa4\u4f5c\u52d5<\/span>\u3059\u308b\u3002<\/p>\n<figure id=\"attachment_4358\" aria-describedby=\"caption-attachment-4358\" style=\"width: 400px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/todayssp.universal.jp\/today\/wp-content\/uploads\/2015\/01\/a2f0020eb9915ec8d39f40187e621a83.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/todayssp.universal.jp\/today\/wp-content\/uploads\/2015\/01\/a2f0020eb9915ec8d39f40187e621a83.gif\" alt=\"\u4e0a\u304b\u3089\u30012\u9032\u30fb\u5341\u9032\u30fb\u554f\u984c\u306e\u3042\u308b\u6642\u523b\u30fb\u6b63\u3057\u3044\u6642\u523b\u3002\uff08GIF\u30a2\u30cb\u30e1\uff093\u664214\u52067\u79d2\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u3067\u8ca0\u306e\u5024\u3068\u306a\u308a\u3001\u6642\u523b\u306b\u72c2\u3044\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\" width=\"400\" height=\"130\" class=\"size-full wp-image-4358\" \/><\/a><figcaption id=\"caption-attachment-4358\" class=\"wp-caption-text\"><span style=\"color: #008080; font-size: 10pt;\">\u4e0a\u304b\u3089\u30012\u9032\u30fb\u5341\u9032\u30fb\u554f\u984c\u306e\u3042\u308b\u6642\u523b\u30fb\u6b63\u3057\u3044\u6642\u523b\u3002\uff08GIF\u30a2\u30cb\u30e1\uff093\u664214\u52067\u79d2\u3092\u8d85\u3048\u305f\u3068\u3053\u308d\u3067\u8ca0\u306e\u5024\u3068\u306a\u308a\u3001\u6642\u523b\u306b\u72c2\u3044\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/span><\/figcaption><\/figure>\n<p>\u3042\u308b\u5b9f\u88c5\u306b\u304a\u3051\u308b time_t \u306e\u578b\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u3060\u3051\u3067\u3042\u308c\u3070\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u306e\u305f\u3063\u305f1\u7b87\u6240 (typedef) \u3092\u66f8\u304d\u63db\u3048\u308b\u3060\u3051\u3067\u3042\u308b\u304c\u3001\u5b9f\u969b\u306e\u904b\u7528\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u304a\u3051\u308b<span style=\"color: #008080;\">\u6642\u523b\u306e\u6271\u3044\u5168\u3066\u304c\u6b63\u3057\u304f\u3042\u308b\u5fc5\u8981<\/span>\u304c\u3042\u308b\u3002<br \/>\u307e\u305f\u3001\u3059\u3067\u306b\u3042\u308b<span style=\"color: #008080;\">\u30c7\u30fc\u30bf\u69cb\u9020\u4e2d\u306732\u30d3\u30c3\u30c8\u56fa\u5b9a\u9577\u3068\u3057\u3066\u5272\u308a\u5f53\u3066<\/span>\u3089\u308c\u3066\u3044\u308c\u3070\u3001\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001<span style=\"color: #008080;\">Linux\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0<\/span>\u3092\u4f8b\u306b\u6319\u3052\u308b\u3068\u3001ext2\u3001ext3\u3001ReiserFS\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306f<span style=\"color: #008080;\">\u540c\u65e5\u4ed8\u307e\u3067\u3057\u304b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044<\/span>\u3002<\/p>\n<p>\u3053\u306e\u671f\u65e5\u4ee5\u524d\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u5185\u90e8\u7684\u306b\u3053\u306e\u5236\u9650\u3092\u8d85\u3048\u305f\u6642\u523b\u30c7\u30fc\u30bf\u3092\u6271\u304a\u3046\u3068\u3059\u308c\u3070\u540c\u69d8\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u3001\u305f\u3068\u3048\u3070<span style=\"color: #008080;\">\u4e01\u5ea6\u534a\u5206\u3092\u7d4c\u904e\u3057\u305f2004\u5e741\u670811\u65e5<\/span>\u306b\u306f\u3059\u3067\u306b<span style=\"color: #008080;\">ATM\u306e\u8aa4\u4f5c\u52d5\u3068\u3044\u3063\u305f\u30c8\u30e9\u30d6\u30eb\u304c\u767a\u751f<\/span>\u3057\u305f\u3002<\/p>\n<p>\u3053\u306e\u4e8b\u4f8b\u3067\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u4e2d\u306e\u3042\u308b\u6642\u523b\u3068\u5225\u306e\u6642\u523b\u306e\u4e2d\u9593\u306e\u6642\u523b\u3092\u6c42\u3081\u308b\u3088\u3046\u306a\u51e6\u7406\u3067\u3001\u76f8\u52a0\u5e73\u5747\u3092\u5358\u7d14\u306b\u6c42\u3081\u308b (t_1 + t_2) \/ 2 \u306e\u3088\u3046\u306a\u5f0f\u3092\u5229\u7528\u3057\u3066\u3044\u305f\u3082\u306e\u3068\u307f\u3089\u308c\u308b\uff08\u8a08\u7b97\u6a5f\u306b\u3088\u308b\u8a08\u7b97\u306b\u304a\u3051\u308b\u3053\u306e\u3088\u3046\u306a\u5f0f\u306b\u3088\u308b\u3001<span style=\"color: #008080;\">\u9732\u5448\u3057\u306b\u304f\u3044\u30d0\u30b0\u306f\u3053\u306e\u554f\u984c\u306b\u9650\u3089\u305a\u666e\u904d\u7684<\/span>\u306a\u3082\u306e\u3067\u3042\u308a\u3001\u4e00\u822c\u306b\u6ce8\u610f\u3092\u8981\u3059\u308b\uff09\u3002<\/p>\n<p>\u4ed6\u306b\u3082<span style=\"color: #008080;\">\u9855\u5728\u5316\u3057\u3066\u3044\u306a\u3044\u30c8\u30e9\u30d6\u30eb\u304c\u4eca\u5f8c\u8868\u9762\u5316\u3059\u308b\u3068\u3044\u3046\u53ef\u80fd\u6027\u306f\u3042\u308a\u5f97\u308b\u3002<\/span><\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7406\u7531\u306b\u3088\u308a\u3001<strong><span style=\"color: #008080;\">2000\u5e74\u554f\u984c\u3088\u308a\u6df1\u523b<\/span><\/strong>\u3067\u3042\u308b\u3068\u3044\u3046\u6307\u6458\u3082\u3042\u308b\u3002<\/p>\n<p>2000\u5e74\u554f\u984c\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ec\u30d9\u30eb\u3067\u306e\u4fee\u6b63\u304c\u53ef\u80fd\u3067\u3042\u3063\u305f\u304c\u3001\u3053\u306e\u554f\u984c\u306f<span style=\"color: #008080;\">\u73fe\u5728\u666e\u53ca\u3057\u3066\u3044\u308bC\u8a00\u8a9e\u51e6\u7406\u7cfb\u3084OS\u306eAPI<\/span>\u3068\u3044\u3063\u305f\u30b7\u30b9\u30c6\u30e0\u306e<span style=\"color: #008080;\">\u6df1\u3044\u30ec\u30a4\u30e4<\/span>\u306b\u6f5c\u3080\u554f\u984c\u3067\u3042\u308b\u3002<\/p>\n<p>\u300c<strong>32\u30d3\u30c3\u30c8\u306e\u7b26\u53f7\u4ed82\u9032\u8868\u73fe\u306b\u304a\u3051\u308b\u30e9\u30c3\u30d7\u30a2\u30e9\u30a6\u30f3\u30c9<\/strong>\u300d\u3068\u3044\u3046\u7406\u7531\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u3042\u308b\u7a0b\u5ea6\u306e\u5c02\u9580\u77e5\u8b58\u3092\u5fc5\u8981\u3068\u3059\u308b\u306e\u3067\u3001<span style=\"color: #008080;\">\u4e00\u822c\u5927\u8846\u3001\u7d4c\u55b6\u8005\u3001\u653f\u6cbb\u5bb6\u306a\u3069\u306e\u7406\u89e3\u3068\u95a2\u5fc3\u3092\u5f97\u306b\u304f\u3044<\/span>\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<p>2000\u5e74\u554f\u984c\u306e\u3088\u3046\u306b\u66a6\u5e74\u306e\u5909\u308f\u308a\u76ee\u3068\u3044\u3046\u30ad\u30ea\u306e\u3088\u3044\u3068\u304d\u306b\u5730\u57df\u306e\u6a19\u6e96\u6642\u306b\u5fdc\u3058\u3066\u9806\u6b21\u306b\u554f\u984c\u306e\u6642\u523b\u304c\u4e16\u754c\u3092\u5de1\u308b\u306e\u3067\u306f\u306a\u304f\u3001<span style=\"color: #008080;\">\u3054\u304f\u4e2d\u9014\u534a\u7aef\u306a\u6642\u523b\u306b\u4e16\u754c\u540c\u6642\u306b\u4e00\u6589\u306b\u554f\u984c\u306e\u6642\u523b\u304c\u8a2a\u308c\u308b<\/span>\u306e\u3067\u3001\u3082\u3057\u554f\u984c\u304c\u751f\u3058\u305f\u5834\u5408\u306f<span style=\"color: #008080;\">\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306e\u4eba\u7684\u8cc7\u6e90\u306e\u78ba\u4fdd\u304c\u3088\u308a\u56f0\u96e3<\/span>\u3068\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<p><span style=\"font-size: 18pt;\"><strong>\u5bfe\u7b56<br \/><\/strong><\/span>\u5bfe\u7b56\u3068\u3057\u3066\u306f\u3001time_t\u578b\u3092<span style=\"color: #008080;\">\u7b26\u53f7\u3064\u304d64\u30d3\u30c3\u30c8\u6574\u6570\u578b\uff08\u4e00\u822c\u306b\u306flong long int\u578b\uff09<\/span>\u306b\u3059\u308b\u3068\u3044\u3046\u65b9\u6cd5\u304c\u3042\u308b\u3002<\/p>\n<p>\u7b26\u53f7\u3064\u304d64\u30d3\u30c3\u30c8\u6574\u6570\u578b\u306e\u5834\u5408\u3001<span style=\"color: #008080;\">\u4e0a\u9650\u306f9,223,372,036,854,775,807 (263 \u2212 1)<\/span> \u3067\u3042\u308b\u3002<\/p>\n<p>\u3053\u308c\u3092\u79d2\u6570\u306b\u7528\u3044\u308b\u3068\u304a\u3088\u305d<span style=\"color: #008080;\">\u897f\u66a63000\u5104\u5e74\u307e\u3067\u4f7f\u7528\u3067\u304d\u308b\u306e<\/span>\u3067\u3001\u4e8b\u5b9f\u4e0a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u306f\u306a\u3044\u3002<\/p>\n<p><span style=\"color: #008080;\">\u6700\u8fd1\u306e\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u3084\u51e6\u7406\u7cfb<\/span>\u3067\u306f\u3001time_t\u578b\u306f\u7b26\u53f7\u3064\u304d64\u30d3\u30c3\u30c8\u6574\u6570\u578b\u3067\u8868\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u304d\u3066\u3044\u308b\u3002<\/p>\n<p>\u307e\u305f\u3001\u4f55\u3089\u304b\u306e\u4e8b\u60c5\u306b\u3088\u308atime_t\u3092<span style=\"color: #008080;\">64\u30d3\u30c3\u30c8\u5316\u3067\u304d\u306a\u3044\u74b0\u5883\u306b\u5bfe\u3057\u3066\u306f<\/span>\u3001time_t\u3092\u7b26\u53f7\u306a\u3057<span style=\"color: #008080;\">32\u30d3\u30c3\u30c8\u6574\u6570\u578b\uff08\u4e00\u822c\u7684\u306b\u306funsigned long int\u578b\uff09<\/span>\u306b\u3059\u308b\u3068\u3044\u3046\u56de\u907f\u7b56\u304c\u4f7f\u308f\u308c\u308b\u3053\u3068\u3082\u3042\u308b\u3002<\/p>\n<p>\u3053\u306e\u5834\u5408\u3001<span style=\"color: #008080;\">\u4e0a\u9650\u306f4,294,967,295 (232 \u2212 1)<\/span> \u3068\u306a\u308a\u3001<span style=\"color: #008080;\">2106\u5e742\u67087\u65e56\u664228\u520615\u79d2\uff08\u958f\u79d2\u3092\u8003\u616e\u3057\u306a\u3044\u5834\u5408\uff09\u307e\u3067\u8868\u73fe\u53ef\u80fd<\/span>\u306b\u306a\u308b\u3002<br \/>\u5f93\u3063\u3066<span style=\"color: #008080;\">2038\u5e74\u554f\u984c\u306f\u56de\u907f<\/span>\u3067\u304d\u308b\u304c\u3001\u7d50\u5c40<span style=\"color: #008080;\">2106\u5e74\u306b\u306f\u554f\u984c\u304c\u767a\u751f<\/span>\u3059\u308b\u305f\u3081\u3001\u3042\u304f\u307e\u306764\u30d3\u30c3\u30c8\u5316\u304c\u56f0\u96e3\u306a\u74b0\u5883\u306b\u9650\u3063\u3066\u9069\u7528\u3059\u3079\u304d\u65b9\u6cd5\u3068\u3055\u308c\u308b\u3002<\/p>\n<p><strong><span style=\"font-size: 18pt;\">\u95a2\u9023\u3057\u305f\u554f\u984c<\/span><\/strong><\/p>\n<p>\u6642\u523ba\u3068\u6642\u523bb\u306e\u4e01\u5ea6\u4e2d\u9593\u306e\u6642\u523b\u3092\u6c42\u3081\u305f\u3044\u6642\u3001\u305d\u308c\u305e\u308c\u306eUnix\u30bf\u30a4\u30e0\u3092Ta\u3068Tb\u3068\u3057\u3066\u3001(Ta+Tb)\/2 \u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308b\u3068\u3001<span style=\"color: #008080;\">2038\u5e74\u554f\u984c\u306e\u534a\u5206\u4ee5\u964d\u304c\u7d4c\u904e<\/span>\u3057\u3066\u3044\u308c\u3070Ta+Tb\u306e\u8a08\u7b97\u3067<span style=\"color: #008080;\">\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3057\u3001\u9593\u9055\u3063\u305f\u7d50\u679c<\/span>\u306b\u306a\u308b\u3002<br \/>\u3053\u308c\u306f1,073,741,824\u79d2\u76ee\u3067\u3042\u308a\u30012004\u5e741\u670810\u65e513\u664237\u52064\u79d2\u4ee5\u964d\u304c\u3053\u306e\u5834\u5408\u306b\u76f8\u5f53\u3059\u308b\uff08<strong>\u5b9f\u969b\u306b2004\u5e741\u670810\u65e5\u4e43\u81f311\u65e5\u306b\u3001\u305d\u306e\u3088\u3046\u306b\u3057\u3066\u8d77\u304d\u305f\u3082\u306e\u3068\u601d\u308f\u308c\u308b\u30c8\u30e9\u30d6\u30eb\u306e\u5831\u544a\u304c\u3042\u3063\u305f<\/strong>\uff09\u3002<\/p>\n<p><span style=\"color: #008080;\"><strong>2001\u5e749\u67089\u65e5\u554f\u984c<\/strong><\/span>\u306f\u30012001\u5e749\u67089\u65e5\u306btime_t\u578b\u306e\u5024\u304c999,999,999\u79d2\u304b\u30891,000,000,000\u79d2\u3068\u6841\u304c\u5897\u3048\u308b\u3053\u3068\u306b\u4f34\u3046\u554f\u984c\u3002<br \/>time_t\u578b\u306e\u5024\u3092\u6587\u5b57\u5217\uff08\u8f9e\u66f8\u9806\uff09\u3067\u30bd\u30fc\u30c8\u3057\u3066\u3044\u305f\u3053\u3068\u3067\u3001\u300c999,999,999 &gt; 1,000,000,000\u300d\u3068\u5224\u65ad\u3055\u308c\u3001\u9805\u76ee\u306e\u65b0\u65e7\u304c\u6b63\u3057\u304f\u5224\u65ad\u3055\u308c\u306a\u3044\u554f\u984c\uff08<span style=\"color: #008080;\">\u65b0\u3057\u304f\u4f5c\u3089\u308c\u305f\u9805\u76ee\u304c\u8868\u793a\u3055\u308c\u306a\u3044\u3001\u53e4\u3044\u3082\u306e\u3068\u307f\u306a\u3055\u308c\u524a\u9664\u3055\u308c\u308b\u306a\u3069<\/span>\uff09\u304c\u767a\u751f\u3057\u305f\u3002<\/p>\n<p><strong><span style=\"color: #008080;\">NTP\u3084Microsoft Windows<\/span><\/strong>\u306a\u3069\u30011900\u5e741\u67081\u65e5\u304b\u3089\u306e\u7a4d\u7b97\u79d2\u6570\u3067\u6642\u9593\u3092\u8868\u73fe\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u3082\u3042\u308a\u3001\u7b26\u53f7\u306a\u305732\u30d3\u30c3\u30c8\u306e\u5024\u304c<span style=\"color: #008080;\">2036\u5e742\u67087\u65e56\u664228\u520615\u79d2 (UTC) \u3092\u8d85\u3048\u308b\u3068\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u554f\u984c\u304c\u767a\u751f<\/span>\u3059\u308b\u3002<br \/><span style=\"color: #008080;\">NTP\u3092\u898f\u5b9a\u3059\u308bRFC 4330<\/span>\u306b\u306f\u3001<span style=\"color: #008080;\">\u6700\u4e0a\u4f4d\u30d3\u30c3\u30c8\u304c0\u306e\u5834\u5408\u306f\u6642\u523b\u304c2036\u5e74\u304b\u30892104\u5e74\u306e\u9593\u3067\u3042\u308b<\/span>\u3068\u307f\u306a\u3057\u3066\u3001<strong>2036\u5e742\u67087\u65e56\u664228\u520616\u79d2 (UTC) \u3092\u8d77\u70b9\u3068\u3057\u3066\u8a08\u7b97\u3059\u308b\u3053\u3068\u30672036\u5e74\u554f\u984c\u3092\u56de\u907f<\/strong>\u3059\u308b\u65b9\u6cd5\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u3002<\/p>\n<p>\u629c\u7c8b\uff1ahttp:\/\/ul.lc\/5awm\uff08wikipedia\uff09\u3088\u308a<\/p>\n<p><span style=\"color: #0000ff; font-size: 14pt;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.amazon.co.jp\/s\/?_encoding=UTF8&amp;camp=247&amp;creative=7399&amp;field-keywords=os&amp;linkCode=ur2&amp;tag=holmes777-22&amp;url=search-alias%3Daps\" target=\"_blank\">PC\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u30fb\u30b7\u30b9\u30c6\u30e0\u3010OS\u3011<\/a><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=holmes777-22&amp;l=ur2&amp;o=9\" border=\"0\" alt=\"\" width=\"1\" height=\"1\" style=\"border: none !important; margin: 0px !important;\" \/><\/span><br \/><span style=\"color: #0000ff; font-size: 14pt;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.amazon.co.jp\/PC%E3%82%B2%E3%83%BC%E3%83%A0-%E3%82%BD%E3%83%95%E3%83%88%E3%82%A6%E3%82%A7%E3%82%A2\/b\/?_encoding=UTF8&amp;camp=247&amp;creative=7399&amp;linkCode=ur2&amp;node=689132&amp;tag=holmes777-22\" target=\"_blank\">\u4eba\u6c17\u306ePC\u30b2\u30fc\u30e0\u3010amazon\u3011<\/a><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=holmes777-22&amp;l=ur2&amp;o=9\" border=\"0\" alt=\"\" width=\"1\" height=\"1\" style=\"border: none !important; margin: 0px !important;\" \/><\/span><br \/><span style=\"color: #0000ff; font-size: 14pt;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.amazon.co.jp\/s\/?_encoding=UTF8&amp;camp=247&amp;creative=7399&amp;fst=as%3Aoff&amp;keywords=%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0&amp;linkCode=ur2&amp;qid=1421596244&amp;rh=n%3A2250738051%2Ck%3A%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0&amp;rnid=2321267051&amp;tag=holmes777-22\" target=\"_blank\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u66f8\u7c4d\u3010Kindle\u3011<\/a><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=holmes777-22&amp;l=ur2&amp;o=9\" border=\"0\" alt=\"\" width=\"1\" height=\"1\" style=\"border: none !important; margin: 0px !important;\" \/><\/span><br \/><span style=\"color: #0000ff; font-size: 14pt;\"><a style=\"color: #0000ff;\" href=\"http:\/\/www.amazon.co.jp\/gp\/search\/?ie=UTF8&amp;camp=247&amp;creative=7399&amp;keywords=%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0&amp;linkCode=ur2&amp;qid=1421596167&amp;rh=i%3Astripbooks%2Ck%3A%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0&amp;tag=holmes777-22\" target=\"_blank\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u66f8\u7c4d\u3010\u666e\u901a\u66f8\u7c4d\u3011<\/a><\/span><br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=holmes777-22&amp;l=ur2&amp;o=9\" border=\"0\" alt=\"\" width=\"1\" height=\"1\" style=\"border: none !important; margin: 0px !important;\" \/><br \/> <iframe loading=\"lazy\" width=\"234\" height=\"60\" marginwidth=\"0\" src=\"http:\/\/ad.jp.ap.valuecommerce.com\/servlet\/htmlbanner?sid=3139282&amp;pid=883233912\" scrolling=\"no\" marginheight=\"0\" allowtransparency=\"true\" frameborder=\"0\"><\/p>\n<p><a href=\"http:\/\/ck.jp.ap.valuecommerce.com\/servlet\/referral?sid=3139282&#038;pid=883233912\" target=\"_blank\" ><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ad.jp.ap.valuecommerce.com\/servlet\/gifbanner?sid=3139282&#038;pid=883233912\" height=\"60\" width=\"234\" border=\"0\"><\/a><\/iframe><iframe loading=\"lazy\" width=\"234\" height=\"60\" marginwidth=\"0\" src=\"http:\/\/ad.jp.ap.valuecommerce.com\/servlet\/htmlbanner?sid=3139282&amp;pid=883233911\" scrolling=\"no\" marginheight=\"0\" allowtransparency=\"true\" frameborder=\"0\"><\/p>\n<p><a href=\"http:\/\/ck.jp.ap.valuecommerce.com\/servlet\/referral?sid=3139282&#038;pid=883233911\" target=\"_blank\" ><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ad.jp.ap.valuecommerce.com\/servlet\/gifbanner?sid=3139282&#038;pid=883233911\" height=\"60\" width=\"234\" border=\"0\"><\/a><\/p>\n<p><\/iframe><\/p>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>2038\u5e74\u554f\u984c 2038\u5e74\u554f\u984c\u306f\u30012038\u5e741\u670819\u65e53\u664214\u52067\u79d2\uff08UTC\u3001\u4ee5\u4e0b\u540c\u69d8\uff09\u3092\u904e\u304e\u308b\u3068\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u8aa4\u52d5\u4f5c\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3055\u308c\u308b\u5e74\u554f\u984c\u3002 \u7d4c\u7def\u6642\u523b\u306e\u8868\u73fe\u3068\u3057\u3066\u300cUNIX\u6642\u9593\u300d\u300a1970\u5e741\u67081\u65e50\u66420\u52060&#8230;<\/p>\n","protected":false},"author":1,"featured_media":4360,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[40,41,42,44,47,65,70,8],"class_list":["post-4356","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1","tag-40","tag-41","tag-42","tag-44","tag-47","tag-65","tag-70","tag-8","wpcat-1-id"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" 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