{"id":226,"date":"2025-07-31T19:53:17","date_gmt":"2025-07-31T11:53:17","guid":{"rendered":"http:\/\/www.tgwttt.xyz\/?p=226"},"modified":"2025-11-24T16:39:49","modified_gmt":"2025-11-24T08:39:49","slug":"%e8%bf%9b%e7%a8%8b%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.tgwttt.xyz\/?p=226","title":{"rendered":"\u8fdb\u7a0b\u63a7\u5236"},"content":{"rendered":"\n<p id=\"u96ceb589\"><strong>\u4e00\uff1a\u8fdb\u7a0b\u521b\u5efa<\/strong><\/p>\n\n\n\n<p id=\"u59a06519\">fork()\u51fd\u6570\uff1a<\/p>\n\n\n\n<p id=\"u9afee198\">#include<unistd.h><\/p>\n\n\n\n<p id=\"u144be9c0\">pid_t fork(void)<\/p>\n\n\n\n<p id=\"u71b7e115\">\u8fdb\u7a0b\u8c03\u7528fork,\u5c06\u63a7\u5236\u8f6c\u79fb\u5230\u5185\u6838\u7684fork\u4ee3\u7801\u540e\uff0c\u5185\u6838\u505a\uff1a<\/p>\n\n\n\n<p id=\"uc07df412\">1.\u5206\u914d\u65b0\u7684\u5185\u5b58\u5757\u548c\u5185\u6838\u6570\u636e\u5185\u5bb9\u62f7\u8d1d\u7ed9\u5b50\u8fdb\u7a0b<\/p>\n\n\n\n<p id=\"u6a8ddfb0\">2.\u5c06\u7236\u8fdb\u7a0b\u90e8\u5206\u6570\u636e\u5185\u5bb9\u62f7\u8d1d\u7ed9\u5b50\u8fdb\u7a0b<\/p>\n\n\n\n<p id=\"ua693ea7b\">3.\u6dfb\u52a0\u5b50\u8fdb\u7a0b\u5230\u7cfb\u7edf\u8fdb\u7a0b\u5217\u8868\u5f53\u4e2d<\/p>\n\n\n\n<p id=\"u0c82af07\">4.fork\u8fd4\u56de\uff0c\u5f00\u59cb\u8c03\u5ea6\u5668\u8c03\u5ea6<\/p>\n\n\n\n<p id=\"uedec0e74\"><strong>\u8fd4\u56de\u503c\uff1a<\/strong><\/p>\n\n\n\n<p id=\"uc3e76c74\">\u5b50\u8fdb\u7a0b\u8fd4\u56de0\uff0c\u7236\u8fdb\u7a0b\u8fd4\u56de\u5b50\u8fdb\u7a0bid\uff0c\u51fa\u9519\u8fd4\u56de1<\/p>\n\n\n\n<p id=\"ub1da600d\"><strong>\u5199\u65f6\u62f7\u8d1d\uff1a<\/strong><\/p>\n\n\n\n<p id=\"u3a50ebd0\">\u901a\u5e38\uff0c\u7236\u5b50\u4ee3\u7801\u5171\u4eab\uff0c\u7236\u5b50\u518d\u4e0d\u5199\u5165\u65f6\uff0c\u6570\u636e\u603b\u662f\u5171\u4eab\u7684\uff0c\u5f53\u4efb\u610f\u4e00\u65b9\u8bd5\u56fe\u5199\u5165\u65f6\uff0c\u4ee5\u5199\u65f6\u62f7\u8d1d\u7684\u65b9\u5f0f\u5404\u81ea\u4e00\u4efd\u526f\u672c<\/p>\n\n\n\n<p id=\"u02429764\">\u539f\u56e0\uff1a\u51cf\u5c11\u5b50\u8fdb\u7a0b\u6210\u672c\uff0c\u51cf\u5c11\u5185\u5b58\u6d6a\u8d39<\/p>\n\n\n\n<p id=\"u91ad0716\"><strong>fork\u8c03\u7528\u5931\u8d25\u7684\u539f\u56e0\uff1a<\/strong><\/p>\n\n\n\n<p id=\"u4e03b963\">\u7cfb\u7edf\u4e2d\u6709\u592a\u591a\u8fdb\u7a0b<\/p>\n\n\n\n<p id=\"u7044c060\">\u5b9e\u9645\u7528\u6237\u7684\u8fdb\u7a0b\u8d85\u8fc7\u4e86\u9650\u5236<\/p>\n\n\n\n<p id=\"u440dcd6d\"><strong>\u4e8c<\/strong><strong>.\u8fdb\u7a0b\u7ec8\u6b62<\/strong><\/p>\n\n\n\n<p id=\"u9542a783\"><strong>\u672c\u8d28<\/strong>\uff1a\u91ca\u653e\u7cfb\u7edf\u8d44\u6e90\uff0c\u5c31\u662f\u91ca\u653e\u8fdb\u7a0b\u7533\u8bf7\u7684\u76f8\u5173\u5185\u6838\u6570\u636e\u7ed3\u6784\u548c\u5bf9\u5e94\u6570\u636e\u548c\u4ee3\u7801<\/p>\n\n\n\n<p id=\"u01fdf9f4\"><strong>\u8fdb\u7a0b\u9000\u51fa\u573a\u666f\uff1a<\/strong><\/p>\n\n\n\n<p id=\"uf06f9a2a\">1.\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5\uff0c\u7ed3\u679c\u6b63\u786e<\/p>\n\n\n\n<p id=\"u2f87220e\">2.\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5\uff0c\u7ed3\u679c\u4e0d\u6b63\u786e<\/p>\n\n\n\n<p id=\"u78eb952d\">3.\u4ee3\u7801\u5f02\u5e38\u7ec8\u6b62<\/p>\n\n\n\n<p id=\"u8b0ba6bf\"><strong>\u9000\u51fa\u7801\uff1a<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753928689665-59f06de6-e046-406b-bdf6-a77dde99ecd8.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753929918291-6b2e13ab-4d89-4386-9a6f-fe7e12379447.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<p id=\"u273a66ba\">\u4e00\u53ef\u4ee5\u4f7f\u7528strerror\uff08i\uff09\u53d6\u6253\u5370<\/p>\n\n\n\n<p id=\"u3e314fe7\">\u8fdb\u7a0b\u4e00\u6bb5\u51fa\u73b0\u5f02\u5e38\uff0c\u9000\u51fa\u7801\u5c31\u6ca1\u6709\u610f\u4e49\u4e86<\/p>\n\n\n\n<p id=\"u5f0c0b3d\">exit(int status)\uff1a\u8868\u793a\u8fdb\u7a0b\u7ed3\u675f\uff0c\u8fdb\u7a0b\u7ec8\u6b62 status\uff1a\u9000\u51fa\u7801<\/p>\n\n\n\n<p id=\"u2f40d0ae\"><strong>\u4e09.\u8fdb\u7a0b\u7b49\u5f85\uff1a<\/strong><\/p>\n\n\n\n<p id=\"u126424cf\"><strong>\u8fdb\u7a0b\u7b49\u5f85\u7684\u5fc5\u8981\u6027\uff1a<\/strong><\/p>\n\n\n\n<p id=\"uef5d9321\">1.\u5b50\u8fdb\u7a0b\u9000\u51fa\uff0c\u7236\u8fdb\u7a0b\u4e0d\u7ba1\u4e0d\u987e\uff0c\u4f1a\u9020\u6210\u50f5\u5c38\u8fdb\u7a0b\u7684\u95ee\u9898\uff0c\u4ece\u800c\u9020\u6210\u5185\u5b58\u6cc4\u9732<\/p>\n\n\n\n<p id=\"u55354fc5\">2.\u6211\u4eec\u9700\u8981\u77e5\u9053\u5b50\u8fdb\u7a0b\u7684\u5b8c\u6210\u7684\u60c5\u51b5<\/p>\n\n\n\n<p id=\"uc7aac8ec\">3.\u7236\u8fdb\u7a0b\u901a\u8fc7\u8fdb\u7a0b\u7b49\u5f85\u7684\u65b9\u5f0f\u56de\u6536\u5b50\u8fdb\u7a0b\u8d44\u6e90<\/p>\n\n\n\n<p id=\"u548c5d30\">wait\u7684\u4f7f\u7528\uff1a<\/p>\n\n\n\n<pre id=\"SqnUq\" class=\"wp-block-code\"><code>#include<unistd.h>                                                                                                                                                                                           \n#include<iostream>\n#include<stdlib.h>\n#include<sys\/wait.h>\nusing namespace std;\nint main(){\n    pid_t id=fork();\n    if(id==0)\n    {\n        int cnt=5;\n        while(cnt){\n            cout<<\"\u5b50\u8fdb\u7a0b\"<<\" \"<<getpid()<<\" \"<<getppid();\n            cnt--;\n            sleep(1);\n        }\n        exit(0);\n\n    }\n    pid_t rid=wait(NULL);\n    \/\/pid_t rid=waitpid(id,&#038;status,0);\n    if(rid>0){\n        cout<<\"sucessful\"<<\" \"<<rid<<endl;\n        cout<<\"exit code:\"<<WEXITSTATUS(status)<<endl;\n        \/\/\u83b7\u53d6\u9000\u51fa\u7801\n    }\n\n    return 0;\n}\n~              <\/code><\/pre>\n\n\n\n<p id=\"u5ab9c9c6\">\u7b49\u5f85\u6210\u529f\u8fd4\u56de\u5b50\u8fdb\u7a0bid \u5931\u8d25-1<\/p>\n\n\n\n<p id=\"u38d6d488\">WEXISTATUS(status)&status\uff1a\u8fd4\u56de\u9000\u51fa\u7801<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753945378326-17ed7a4d-7b27-4514-9c5b-cdca59c04755.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<p id=\"u67262e06\">options:WNOHANG(\u975e\u963b\u585e\u8c03\u7528)<\/p>\n\n\n\n<p id=\"ueff2ab9e\">\u6b64\u65f6\u8fd4\u56de\u503c\u6709\u4e09\u79cd\uff1apid>0:\u7b49\u5f85\u7ed3\u675f<\/p>\n\n\n\n<p id=\"ue3274e7e\">pid=0:\u8c03\u7528\u7ed3\u675f\uff0c\u4f46\u5b50\u8fdb\u7a0b\u6ca1\u6709\u9000\u51fa<\/p>\n\n\n\n<p id=\"u1340f16c\">pid\uff1a\u5931\u8d25<\/p>\n\n\n\n<p id=\"ub9714274\"><strong>\u56db.\u8fdb\u7a0b\u7684\u7a0b\u5e8f\u66ff\u6362<\/strong><\/p>\n\n\n\n<p id=\"u3592e476\"><strong>1.\u66ff\u6362\u539f\u7406\uff1a<\/strong><\/p>\n\n\n\n<p id=\"u81531619\">\u2f64fork\u521b\u5efa\u2f26\u8fdb\u7a0b\u540e\u6267\u2f8f\u7684\u662f\u548c\u2f57\u8fdb\u7a0b\u76f8\u540c\u7684\u7a0b\u5e8f(\u4f46\u6709\u53ef\u80fd\u6267\u2f8f\u4e0d\u540c\u7684\u4ee3\u7801\u5206\u2f40),\u2f26\u8fdb\u7a0b\u5f80\u5f80\u8981\u8c03\u2f64\u2f00\u79cd exec \u51fd\u6570\u4ee5\u6267\u2f8f\u53e6\u2f00\u4e2a\u7a0b\u5e8f\u3002\u5f53\u8fdb\u7a0b\u8c03\u2f64\u2f00\u79cd exec\u51fd\u6570\u65f6,\u8be5\u8fdb\u7a0b\u7684\u2f64\u2f3e\u7a7a\u95f4\u4ee3\u7801\u548c\u6570\u636e\u5b8c\u5168\u88ab\u65b0\u7a0b\u5e8f\u4ee3\u66ff,\u4ece\u65b0\u7a0b\u5e8f\u7684\u542f\u52a8\u4f8b\u7a0b\u5f00\u59cb\u6267\u884c\u3002\u8c03\u2f64exec\u5e76\u4e0d\u521b\u5efa\u65b0\u8fdb\u7a0b,\u6240\u4ee5\u8c03\u2f64exec\u524d\u540e\u8be5\u8fdb\u7a0b\u7684 id \u5e76\u672a\u6539\u53d8\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753948162126-2ffe5223-78dc-4ada-9448-ef70eafeacb8.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753950041784-b0ca9bee-b32a-4ade-9301-6f4896c7c6d6.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<p id=\"u3b8924c5\"><strong><br><\/strong><strong><\/strong><\/p>\n\n\n\n<p id=\"u67b5e423\">\u5982\u4ee5\u4e0a\u4ee3\u7801\u5f53\u6267\u884c\u5230execl\u65f6\u4e0b\u9762\u4ee3\u7801\u4f1a\u76f4\u63a5\u88abexecl\u76f4\u63a5\u66ff\u6362\u3002<\/p>\n\n\n\n<p id=\"u0b3278bf\">\u53ea\u6709\u53d1\u751f\u5931\u8d25\u65f6\u4f1a\u51fa\u73b0\u8fd4\u56de\u503c-1\uff0c\u5176\u4f59\u90fd\u4e0d\u4f1a\u6709\u8fd4\u56de\u503c<\/p>\n\n\n\n<p id=\"u7acebb27\">\u4e0b\u9762\u662fexec\u51fd\u6570\u603b\u7ed3\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1753950321046-a7e1b585-7f38-4d05-b1cf-2ce9d45d1115.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<p id=\"u06fe91dd\">1.int execl(const char*path,const char*arg,...)\uff1a\u8def\u5f84+\u7a0b\u5e8f\u540d+\u53c2\u6570<\/p>\n\n\n\n<p id=\"u1107c2bb\">\u6ce8\u610f\uff1a\u5fc5\u987b\u8981\u4ee5NULL\u7ed3\u5c3e\u8868\u793a\u4f20\u53c2\u7ed3\u675f<\/p>\n\n\n\n<p id=\"u3f7eb732\">2.int execlp(const char*file,const char*arg,...):\u7a0b\u5e8f\u540d+\u53c2\u6570<\/p>\n\n\n\n<p id=\"uf3ac2135\">\u6ce8\u610f\uff1a\u662f\u5728\u73af\u5883\u53d8\u91cf\u91cc\u9762\u67e5\u627e<\/p>\n\n\n\n<p id=\"u69fe2c52\">3.int execlp(const char<em>path,char*<\/em>const argv[]):\u8def\u5f84+\u52a0\u53c2\u6570\u6570\u7ec4<\/p>\n\n\n\n<p id=\"u0961ed95\">\u6ce8\u610f\uff1a\u4e5f\u5fc5\u987b\u4ee5NULL\u7ed3\u5c3e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\uff1a\u8fdb\u7a0b\u521b\u5efa fork()\u51fd\u6570\uff1a #include pid_t fork(void) \u8fdb\u7a0b\u8c03\u7528fork,\u5c06\u63a7\u5236&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-226","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/226","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=226"}],"version-history":[{"count":4,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/226\/revisions"}],"predecessor-version":[{"id":859,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/226\/revisions\/859"}],"wp:attachment":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}