{"id":383,"date":"2016-08-15T21:31:28","date_gmt":"2016-08-15T13:31:28","guid":{"rendered":"http:\/\/www.5x44.cn\/?p=383"},"modified":"2016-08-15T21:36:41","modified_gmt":"2016-08-15T13:36:41","slug":"exit%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=383","title":{"rendered":"exit\u51fd\u6570"},"content":{"rendered":"

\u4e4b\u524d\u8bf4\u8fc7\u8fdb\u7a0b\u6b63\u5e38\u7ed3\u675f\u7684\u4e94\u79cd\u4e3b\u6cd5\uff1a<\/p>\n

    \n
  1. \u5728main<\/span>\u51fd\u6570\u4e2d\u6267\u884creturn<\/span>\u51fd\u6570\u3002<\/li>\n
  2. \u8c03\u7528exit<\/span>\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u88ab ISO C\u5b9a\u4e49\u5e76\u4e14\u4f1a\u8c03\u7528\u6240\u6709\u88abatexit<\/span>\u6ce8\u518c\u7684\u53e5\u67c4\uff0c\u4e4b\u540e\u518d\u5173\u95ed\u6240\u6709\u6807\u51c6I\/O\u6d41\u3002\u56e0\u4e3aISO C\u5e76\u4e0d\u64cd\u4f5c\u6587\u4ef6\u63cf\u8ff0\u7b26\u3001\u591a\u8fdb\u7a0b\u548c\u4efb\u52a1\u63a7\u5236\uff0c\u6240\u4ee5\u8fd9\u4e2a\u51fd\u6570\u5bf9\u4e8eUNIX\u7cfb\u7edf\u6765\u8bf4\u5b83\u7684\u5b9a\u4e49\u5e76\u4e0d\u5b8c\u6574\u3002<\/li>\n
  3. \u8c03\u7528_exit<\/span>\u6216_Exit<\/span>\u51fd\u6570\u3002ISO C\u5b9a\u4e49\u7684_Exit<\/span>\u51fd\u6570\u7528\u4e8e\u7ed3\u675f\u8fdb\u7a0b\u4f46\u5e76\u4e0d\u8fd0\u884c\u9000\u51fa\u53e5\u67c4\u6216\u4fe1\u53f7\u53e5\u67c4\uff08signa handlers\uff09\u3002\u6807\u51c6I\/O\u6d41\u662f\u5426\u88ab\u5237\u65b0\u8fd9\u4f9d\u8d56\u4e8e\u5177\u4f53\u5b9e\u73b0\u3002\u5728UNIX\u7cfb\u7edf\u4e0a\uff0c_Exit<\/span>\u548c_exit<\/span>\u662f\u76f8\u540c\u7684\uff0c\u90fd\u4e0d\u5237\u65b0\u6807\u51c6I\/O\u6d41\u3002_exit<\/span>\u51fd\u6570\u88abexit\u8c03\u7528\uff0c\u5e76\u5904\u7406unix\u7cfb\u7edf\u7279\u522b\u5b9a\u7684\u7ec6\u8282\u3002_exit<\/span>\u662f\u88abPOSIX.1\u5b9a\u4e49\u7684\u3002<\/li>\n
  4. \u5728\u8fdb\u7a0b\u7684\u6700\u540e\u4e00\u4e2a\u7ebf\u7a0b\u7684\u5f00\u59cb\u4f8b\u7a0b\uff08start routine\uff09\u4e2d\u6267\u884creturn<\/span>\u3002\u7ebf\u7a0b\u7684\u8fd4\u56de\u503c\u5e76\u4e0d\u505a\u4e3a\u8fdb\u7a0b\u7684\u8fd4\u56de\u503c\u3002\u5f53\u6700\u540e\u4e00\u4e2a\u7ebf\u7a0b\u4ece\u5f00\u59cb\u4f8b\u7a0b\u4e2d\u8fd4\u56de\u65f6\uff0c\u8fdb\u7a0b\u7684\u7ed3\u675f\u72b6\u6001\u662f0\u3002<\/li>\n
  5. \u5728\u8fdb\u7a0b\u7684\u6700\u540e\u4e00\u4e2a\u7ebf\u7a0b\u4e2d\u8c03\u7528pthread_exit<\/span>\u51fd\u6570\u3002\u65e0\u8bba\u4f20\u7ed9pthread_exit<\/span>\u7684\u53c2\u6570\u662f\u4ec0\u4e48\u8fdb\u7a0b\u7684\u7ed3\u901f\u72b6\u6001\u4e00\u76f4\u90fd\u662f0\u3002<\/li>\n<\/ol>\n

    \u4e0b\u9762\u662f\u4e09\u79cd\u975e\u6b63\u5e38\u7ed3\u675f\u7684\u60c5\u51b5\uff1a<\/p>\n

      \n
    1. \u8c03\u7528abort<\/span>\u3002\u5b83\u4ea7\u751fSIGABRT<\/span>\u4fe1\u53f7\u3002<\/li>\n
    2. \u5f53\u8fdb\u7a0b\u6536\u5230\u67d0\u4e9b\u4fe1\u53f7\u3002\u4fe1\u53f7\u80fd\u88ab\u8fdb\u7a0b\u81ea\u5df1\u4ea7\u751f\uff0c\u5982\u8c03\u7528abort\uff0c\u6216\u7531\u5185\u6838\u4ea7\u751f\u3002\u7531\u5185\u6838\u4ea7\u751f\u5305\u542b\u5f15\u7528\u4e86\u4e0d\u662f\u81ea\u5df1\u5730\u5740\u7a7a\u95f4\u7684\u5185\u5b58\u6216\u9664\u6570\u4e3a\u96f6\u3002<\/li>\n
    3. \u6700\u540e\u4e00\u4e2a\u7ebf\u7a0b\u54cd\u5e94\u4e2d\u6b62\u8bf7\u6c42\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u4e2d\u6b62\u53d1\u751f\u5728\u63a8\u8fdf\u65b9\u5f0f\u4e2d\uff1a\u4e00\u4e2a\u7ebf\u7a0b\u8bf7\u6c42\u4e86\u4e00\u4e2a\u7a0d\u540e\u88ab\u5176\u5b83\u7ebf\u7a0b\u7ed3\u675f\u7684\u76ee\u6807\u3002<\/li>\n<\/ol>\n

      \u65e0\u8bba\u8fdb\u7a0b\u5982\u4f55\u7ed3\u675f\uff0c\u5185\u6838\u6700\u7ec8\u90fd\u4f1a\u6267\u884c\u76f8\u540c\u7684\u4ee3\u7801\u3002\u5185\u6838\u5173\u95ed\u6240\u6709\u6253\u5f00\u7684\u63cf\u8ff0\u7b26\u3001\u91ca\u653e\u5360\u7528\u7684\u5185\u5b58\u3002<\/p>\n

      \u7ed3\u675f\u7684\u8fdb\u7a0b\u90fd\u53ef\u4ee5\u901a\u77e5\u5b83\u7684\u7236\u8fdb\u7a0b\uff0c\u5b83\u81ea\u5df1\u662f\u5982\u4f55\u7ed3\u675f\u7684\u3002\u5bf9\u4e8e\u4e09\u4e2aexit\u51fd\u6570\uff08exit\uff0c _exit , _Exit\uff09\u662f\u901a\u8fc7\u5b83\u4eec\u7684\u53c2\u6570\u4f20\u9012\u9000\u51fa\u72b6\u6001\u7684\u3002\u5728\u4e00\u4e9b\u975e\u6b63\u5e38\u7ec8\u6b62\u7684\u60c5\u51b5\u4e0b\uff0c\u7531\u5185\u6838\u800c\u4e0d\u662f\u8fdb\u7a0b\u4ea7\u751f\u7ec8\u6b62\u72b6\u6001\uff0c\u6765\u6307\u51fa\u975e\u6b63\u5e38\u7ed3\u675f\u7684\u539f\u56e0\u3002\u5728\u4efb\u610f\u60c5\u51b5\u4e0b\u7236\u8fdb\u7a0b\u90fd\u53ef\u4ee5\u901a\u8fc7wait<\/span>\u6216waitpid<\/span>\u51fd\u6570\u83b7\u5f97\u9000\u51fa\u72b6\u6001\u3002<\/p>\n

      \u6ce8\u610f\uff0c\u6211\u4eec\u8981\u533a\u5206\u9000\u51fa\u72b6\u6001\uff08\u6765\u81ea\u4e09\u4e2aexit\u51fd\u6570\u4e2d\u7684\u53c2\u6570\uff0c\u8fd8\u662f\u4ecemain<\/span>\u51fd\u6570\u4e2d\u7684\u8fd4\u56de\u503c\uff09\u548c\u7ec8\u6b62\u72b6\u6001\u3002\u5f53\u5185\u6838\u6700\u540e\u8c03\u7528_exit<\/span>\u65f6\uff0c\u4f1a\u5c06\u201c\u9000\u51fa\u72b6\u6001\u201d\u8f6c\u6362\u6210\u201c\u7ec8\u6b62\u72b6\u6001\u201d\u3002<\/p>\n

      \u5982\u679c\u7236\u8fdb\u7a0b\u5728\u5b50\u8fdb\u7a0b\u4e4b\u524d\u7ed3\u675f\uff0c\u90a3\u4e48init\u8fdb\u7a0b\u4f1a\u53d8\u6210\u8be5\u8fdb\u7a0b\u7684\u7236\u8fdb\u7a0b\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4fdd\u8bc1\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u7236\u8fdb\u7a0b\u3002<\/p>\n

      \u53e6\u4e00\u79cd\u60c5\u51b5\u662f\u5b50\u8fdb\u7a0b\u5148\u7ed3\u675f\u3002\u5982\u679c\u5b50\u8fdb\u7a0b\u5b8c\u5168\u9690\u85cf\uff0c\u7236\u8fdb\u7a0b\u65e0\u6cd5\u5f97\u5230\u5b83\u7684\u7ed3\u675f\u72b6\u6001\uff0c\u4f46\u662f\u7236\u8fdb\u7a0b\u6700\u7ec8\u5fc5\u987b\u68c0\u67e5\u5b50\u8fdb\u7a0b\u662f\u5426\u7ed3\u675f\u3002\u5185\u6838\u4e3a\u6bcf\u4e2a\u6b63\u5728\u7ed3\u675f\u7684\u8fdb\u7a0b\u4fdd\u5b58\u5c11\u91cf\u4fe1\u606f\uff0c\u6240\u4ee5\u5f53\u8fd9\u4e2a\u6b63\u5728\u7ed3\u675f\u7684\u8fdb\u7a0b\u7684\u7236\u8fdb\u7a0b\u8c03\u7528wait<\/span>\u6216waitpid<\/span>\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u4fe1\u606f\u3002\u8fd9\u4e9b\u4fe1\u606f\u7684\u6700\u5c0f\u7ec4\u6210\u662f\u7531\uff1a\u8fdb\u7a0bID\u3001\u8fdb\u7a0b\u7ed3\u901f\u72b6\u6001\u548c\u8fdb\u7a0b\u7684CPU\u65f6\u95f4\u603b\u91cf\u3002\u5185\u6838\u53ef\u4ee5\u9500\u6bc1\u8fdb\u7a0b\u4f7f\u7528\u7684\u6240\u6709\u5185\u5b58\u5e76\u4e14\u5173\u95ed\u6240\u6709\u6253\u5f00\u7684\u6587\u4ef6\u3002\u5728UNIX\u7cfb\u7edf\u7684\u672f\u8bed\u4e2d\uff0c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u5df2\u7ecf\u7ed3\u675f\uff0c\u4f46\u662f\u5b83\u7684\u7236\u8fdb\u7a0b\u6ca1\u6709\u5bf9\u5b83\u8fdb\u884c\u5584\u540e\u5904\u7406\uff08\u83b7\u5f97\u5b50\u8fdb\u7a0b\u7684\u6709\u5173\u4fe1\u606f\uff0c\u91ca\u653e\u5b83\u5360\u7528\u7684\u8d44\u6e90\u7b49\uff09\uff08but whose parent has not yet waited for it, is called a zombie\uff09\uff0c\u8fd9\u88ab\u79f0\u4f5czombie<\/em>\u3002ps<\/span>\u547d\u4ee4\u8f93\u51fazombie\u8fdb\u7a0b\u7684\u53c2\u6570\u662fZ\u3002\u5982\u679c\u5199\u4e86\u4e00\u4e2a\u4e00\u76f4\u8fd0\u884c\u7684\u7a0b\u5e8f\uff0c\u5b83fork<\/span>\u4e86\u5f88\u591a\u7684\u5b50\u8fdb\u7a0b\uff0c\u9664\u975e\u7236\u8fdb\u7a0b\u7b49\u5f85\u5b83\u7684\u5b50\u8fdb\u7a0b\u5e76\u5f97\u5230\u5b83\u4eec\u7684\u7ed3\u675f\u72b6\u6001\uff0c\u5426\u5219\u5b83\u4eec\u4f1a\u53d8\u6210zombie\u8fdb\u7a0b\u3002<\/p>\n

      \u6700\u540e\u4e00\u79cd\u60c5\u51b5\u662f\uff1a\u5f53\u4e00\u4e2a\u88abinit\u8fdb\u7a0b\u9886\u517b\u7684\u8fdb\u7a0b\u7ed3\u675f\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f\u4f1a\u53d8\u6210zombie\u8fdb\u7a0b\u4e48\uff1f\u5f53\u7136\u4e0d\u4f1a\uff01\u56e0\u4e3a\u5f53init\u7684\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u7ec8\u6b62\u65f6\uff0c\u5b83\u4f1a\u8c03\u7528wait<\/span>\u51fd\u6570\u4e2d\u4e00\u4e2a\u53bb\u83b7\u5f97\u7ec8\u6b62\u72b6\u6001\u3002\u8fd9\u4e48\u505a\u662f\u9632\u6b62\u7cfb\u7edf\u88abzombie\u5835\u585e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u4e4b\u524d\u8bf4\u8fc7\u8fdb\u7a0b\u6b63\u5e38\u7ed3\u675f\u7684\u4e94\u79cd\u4e3b\u6cd5\uff1a \u5728main\u51fd\u6570\u4e2d\u6267\u884creturn\u51fd\u6570\u3002 \u8c03\u7528exit\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u88ab ISO C\u5b9a\u4e49\u5e76\u4e14\u4f1a\u8c03\u7528\u6240\u6709\u88abatexit\u6ce8\u518c\u7684\u53e5\u67c4\uff0c\u4e4b…<\/p>\n

      Read More Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-383","post","type-post","status-publish","format-standard","hentry","category-apue"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/383","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=383"}],"version-history":[{"count":11,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/383\/revisions"}],"predecessor-version":[{"id":394,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/383\/revisions\/394"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}