{"id":403,"date":"2016-08-19T14:56:35","date_gmt":"2016-08-19T06:56:35","guid":{"rendered":"http:\/\/www.5x44.cn\/?p=403"},"modified":"2016-08-21T21:02:44","modified_gmt":"2016-08-21T13:02:44","slug":"waitid%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=403","title":{"rendered":"waitid\u51fd\u6570"},"content":{"rendered":"

Single Unix Specification\u7684XSI\u6269\u5c55\u5305\u542b\u4e86\u9644\u52a0\u51fd\u6570\uff0c\u7528\u4e8e\u63a5\u6536\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002waitid<\/span>\u51fd\u6570\u7c7b\u4f3c\u4e8ewaitpid<\/span>\uff0c\u4f46\u662f\u63d0\u4f9b\u989d\u5916\u7684\u7075\u6d3b\u6027\u3002<\/p>\n\n\n\n\n
\n
#include <sys\/wait.h>\r\n\r\nint waitid(idtype_t idtype<\/span>, id_t id<\/span>, siginfo_t *infop<\/span>, int options<\/span>);\r\n<\/span><\/pre>\n<\/td>\n<\/tr>\n
\n

Returns: 0 if OK, 1 on error<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u50cfwaitpid<\/span>\uff0cwaitid<\/span>\u5141\u8bb8\u8fdb\u7a0b\u4e13\u95e8\u63a5\u6536\u67d0\u4e00\u5b50\u8fdb\u7a0b\u7684\u7ec8\u6b62\u72b6\u6001\u3002\u53d6\u66ff\u4e86\u5c06PID\uff08\u8fdb\u7a0bID\uff09\u548cPGID\uff08\u8fdb\u7a0b\u7ec4ID\uff09\u6346\u7ed1\u6210\u5355\u72ec\u7684\u4e00\u4e2a\u53c2\u6570\uff0c\u7528\u4e24\u4e2a\u5206\u5f00\u7684\u53c2\u6570\u4ee3\u66ff\u3002<\/p>\n

id<\/em>\u7684\u503c\u662f\u6839\u636eidtype<\/em>\u7684\u503c\u800c\u5b9a\u7684\uff0c\u4e0b\u9762\u662f\u5b83\u53ef\u9009\u7684\u503c\uff1a<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
\n
Figure 8.9. The idtype<\/span> constants for waitid<\/tt><\/span><\/h5>\n<\/caption>\n
\n

Constant<\/span><\/p>\n<\/th>\n

\n

Description<\/span><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

P_PID<\/tt><\/span><\/p>\n<\/td>\n

\n

\u5b50\u8fdb\u7a0b\u7684PID\uff08\u8fdb\u7a0bID\uff09<\/p>\n<\/td>\n<\/tr>\n

\n

P_PGID<\/tt><\/span><\/p>\n<\/td>\n

\u5b50\u8fdb\u7a0b\u7684PGID\uff08\u7ec4ID\uff09<\/td>\n<\/tr>\n
\n

P_ALL<\/tt><\/span><\/p>\n<\/td>\n

\n

\u6240\u6709\u5b50\u8fdb\u7a0b\uff0cID\u53c2\u6570\u88ab\u5ffd\u7565\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

options\u53c2\u6570\u662f\u4e00\u4e2a\u63a9\u7801\u4f4d\uff0c\u7528\u6807\u8bb0\u7684OR\u64cd\u4f5c\u51b3\u5b9a\u6700\u540e\u7684\u503c\u3002\u8fd9\u4e2a\u6807\u8bb0\u6307\u793a\u4e86\uff0c\u54ea\u4e9b\u72b6\u6001\u6539\u53d8\u662f\u8c03\u7528\u8005\u611f\u5174\u8da3\u7684\u3002<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n
\n
Figure 8.10. The options<\/span> constants for waitid<\/tt><\/h5>\n<\/caption>\n
\n

Constant<\/span><\/p>\n<\/th>\n

\n

Description<\/span><\/p>\n<\/th>\n<\/tr>\n<\/thead>\n

\n

WCONTINUED<\/tt><\/span><\/p>\n<\/td>\n

\n

\u4e4b\u524d\u5df2\u7ecf\u505c\u6b62\u7684\u8fdb\u7a0b\uff0c\u4f46\u5b83\u6ca1\u6709\u91ca\u653e\u8d44\u6e90 \uff0c\u5e76\u4e14\u6ca1\u6709\u62a5\u544a\u5b83\u7684\u8fd0\u884c\u72b6\u6001\u3002<\/p>\n<\/td>\n<\/tr>\n

\n

WEXITED<\/tt><\/span><\/p>\n<\/td>\n

\n

\u5df2\u7ecf\u9000\u51fa\u7684\u8fdb\u7a0b\u3002<\/p>\n<\/td>\n<\/tr>\n

\n

WNOHANG<\/tt><\/span><\/p>\n<\/td>\n

\n

\u5982\u679c\u6ca1\u6709\u53ef\u7528\u7684\u5b50\u8fdb\u7a0b\u9000\u51fa\u72b6\u6001\uff0c\u90a3\u4e48\u7acb\u5373\u8fd4\u56de\uff0c\u800c\u4e0d\u662f\u963b\u585e\u8fdb\u7a0b\u3002<\/p>\n<\/td>\n<\/tr>\n

\n

WNOWAIT<\/tt><\/span><\/p>\n<\/td>\n

\n

\u4e0d\u5220\u9664\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u53ef\u4ee5\u88ab\u540e\u7eed\u8c03\u7528\u7684wait<\/span>, waitid<\/span>\u6216waitpid<\/span>\u63a5\u6536\u3002<\/p>\n<\/td>\n<\/tr>\n

\n

WSTOPPED<\/tt><\/span><\/p>\n<\/td>\n

\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u505c\u6b62\uff0c\u4f46\u8fd8\u6ca1\u6709\u62a5\u544a\u5b83\u7684\u72b6\u6001\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

infop<\/em>\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u5411siginfo<\/span>\u7ed3\u6784\u7684\u6307\u9488\u3002\u8fd9\u4e2a\u7ed3\u6784\u5305\u542b\u4e86\u5173\u4e8e\u5728\u5b50\u8fdb\u7a0b\u4e2d\u5df2\u4ea7\u751f\u7684\u4fe1\u53f7\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Single Unix Specification\u7684XSI\u6269\u5c55\u5305\u542b\u4e86\u9644\u52a0\u51fd\u6570\uff0c\u7528\u4e8e\u63a5\u6536\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002waitid\u51fd\u6570\u7c7b\u4f3c\u4e8ewaitpid\uff0c\u4f46\u662f\u63d0\u4f9b\u989d\u5916\u7684\u7075\u6d3b\u6027…<\/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-403","post","type-post","status-publish","format-standard","hentry","category-apue"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/403","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=403"}],"version-history":[{"count":7,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/403\/revisions"}],"predecessor-version":[{"id":412,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/403\/revisions\/412"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}