{"id":280,"date":"2025-08-26T18:08:29","date_gmt":"2025-08-26T10:08:29","guid":{"rendered":"http:\/\/www.tgwttt.xyz\/?p=280"},"modified":"2025-11-24T16:37:57","modified_gmt":"2025-11-24T08:37:57","slug":"linux%e8%bf%9b%e7%a8%8b%e4%bf%a1%e5%8f%b7%ef%bc%882%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.tgwttt.xyz\/?p=280","title":{"rendered":"linux\u8fdb\u7a0b\u4fe1\u53f7\uff082\uff09"},"content":{"rendered":"\n<p>\u672c\u6587\u63a5\u4e0a\u7bc7\u6587\u7ae0\uff1a<a href=\"http:\/\/www.tgwttt.xyz\/?p=271\">http:\/\/www.tgwttt.xyz\/?p=271<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u4fdd\u5b58\u4fe1\u53f7<\/strong><\/h2>\n\n\n\n<p><strong>\u4fe1\u53f7\u5176\u4ed6\u76f8\u5173\u5e38\u2ec5\u6982\u5ff5 <\/strong><\/p>\n\n\n\n<p>\u2022 \u5b9e\u9645\u6267\u2f8f\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u79f0\u4e3a\u4fe1\u53f7\u9012\u8fbe(Delivery) <\/p>\n\n\n\n<p>\u2022 \u4fe1\u53f7\u4ece\u4ea7\u2f63\u5230\u9012\u8fbe\u4e4b\u95f4\u7684\u72b6\u6001,\u79f0\u4e3a\u4fe1\u53f7\u672a\u51b3(Pending)\u3002 <\/p>\n\n\n\n<p>\u2022 \u8fdb\u7a0b\u53ef\u4ee5\u9009\u62e9\u963b\u585e (Block )\u67d0\u4e2a\u4fe1\u53f7\u3002 <\/p>\n\n\n\n<p>\u2022 \u88ab\u963b\u585e\u7684\u4fe1\u53f7\u4ea7\u2f63\u65f6\u5c06\u4fdd\u6301\u5728\u672a\u51b3\u72b6\u6001,\u76f4\u5230\u8fdb\u7a0b\u89e3\u9664\u5bf9\u6b64\u4fe1\u53f7\u7684\u963b\u585e,\u624d\u6267\u2f8f\u9012\u8fbe\u7684\u52a8\u4f5c. <\/p>\n\n\n\n<p>\u2022 \u963b\u585e\u548c\u5ffd\u7565\u662f\u4e0d\u540c\u7684,\u53ea\u8981\u4fe1\u53f7\u88ab\u963b\u585e\u5c31\u4e0d\u4f1a\u9012\u8fbe,\u2f7d\u5ffd\u7565\u662f\u5728\u9012\u8fbe\u4e4b\u540e\u53ef\u9009\u7684\u2f00\u79cd\u5904\u7406\u52a8\u4f5c\u3002<\/p>\n\n\n\n<p><strong>\u4fe1\u53f7\u5728\u5185\u6838\u4e2d\u7684\u8868\u2f70\u2f70\u610f\u56fe<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"875\" height=\"206\" src=\"http:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-23.png\" alt=\"\" class=\"wp-image-281\" srcset=\"https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-23.png 875w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-23-300x71.png 300w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-23-768x181.png 768w\" sizes=\"auto, (max-width: 875px) 100vw, 875px\" \/><\/figure>\n\n\n\n<p>\u6bcf\u4e2a\u4fe1\u53f7\u90fd\u6709\u4e24\u4e2a\u6807\u5fd7\u4f4d\u5206\u522b\u8868\u2f70\u963b\u585e(block)\u548c\u672a\u51b3(pending),\u8fd8\u6709\u2f00\u4e2a\u51fd\u6570\u6307\u9488\u8868\u2f70\u5904\u7406\u52a8\u4f5c\u3002\u4fe1\u53f7\u4ea7\u2f63\u65f6,\u5185\u6838\u5728\u8fdb\u7a0b\u63a7\u5236\u5757\u4e2d\u8bbe\u7f6e\u8be5\u4fe1\u53f7\u7684\u672a\u51b3\u6807\u5fd7,\u76f4\u5230\u4fe1\u53f7\u9012\u8fbe\u624d\u6e05\u9664\u8be5\u6807\u5fd7\u3002\u5728\u4e0a\u56fe\u7684\u4f8b\u2f26\u4e2d,SIGHUP\u4fe1\u53f7\u672a\u963b\u585e\u4e5f\u672a\u4ea7\u2f63\u8fc7,\u5f53\u5b83\u9012\u8fbe\u65f6\u6267\u2f8f\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u3002 <\/p>\n\n\n\n<p>\u2022 SIGINT\u4fe1\u53f7\u4ea7\u2f63\u8fc7,\u4f46\u6b63\u5728\u88ab\u963b\u585e,\u6240\u4ee5\u6682\u65f6\u4e0d\u80fd\u9012\u8fbe\u3002\u867d\u7136\u5b83\u7684\u5904\u7406\u52a8\u4f5c\u662f\u5ffd\u7565,\u4f46\u5728\u6ca1\u6709\u89e3\u9664\u963b\u585e\u4e4b\u524d\u4e0d\u80fd\u5ffd\u7565\u8fd9\u4e2a\u4fe1\u53f7,\u56e0\u4e3a\u8fdb\u7a0b\u4ecd\u6709\u673a\u4f1a\u6539\u53d8\u5904\u7406\u52a8\u4f5c\u4e4b\u540e\u518d\u89e3\u9664\u963b\u585e\u3002 <\/p>\n\n\n\n<p>\u2022 SIGQUIT\u4fe1\u53f7\u672a\u4ea7\u2f63\u8fc7,\u2f00\u65e6\u4ea7\u2f63SIGQUIT\u4fe1\u53f7\u5c06\u88ab\u963b\u585e,\u5b83\u7684\u5904\u7406\u52a8\u4f5c\u662f\u2f64\u2f3e\u2f83\u5b9a\u4e49\u51fd\u6570sighandler\u3002 \u5982\u679c\u5728\u8fdb\u7a0b\u89e3\u9664\u5bf9\u67d0\u4fe1\u53f7\u7684\u963b\u585e\u4e4b\u524d\u8fd9\u79cd\u4fe1\u53f7\u4ea7\u2f63\u8fc7\u591a\u6b21,\u5c06\u5982\u4f55\u5904\u7406?POSIX.1\u5141\u8bb8\u7cfb\u7edf\u9012\u9001\u8be5\u4fe1\u53f7\u2f00\u6b21\u6216\u591a\u6b21\u3002Linux\u662f\u8fd9\u6837\u5b9e\u73b0\u7684:\u5e38\u89c4\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u2f63\u591a\u6b21\u53ea\u8ba1\u2f00\u6b21,\u2f7d\u5b9e\u65f6\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u2f63\u591a\u6b21\u53ef\u4ee5\u4f9d\u6b21\u653e\u5728\u2f00\u4e2a\u961f\u5217\u2fa5\u3002<\/p>\n\n\n\n<p><strong>sigset_t<\/strong><br>\u6bcf\u4e2a\u4fe1\u53f7\u53ea\u6709\u2f00\u4e2abit\u7684\u672a\u51b3\u6807\u5fd7, \u2fae0\u53731, \u4e0d\u8bb0\u5f55\u8be5\u4fe1\u53f7\u4ea7\u2f63\u4e86\u591a\u5c11\u6b21,\u963b\u585e\u6807\u5fd7\u4e5f\u662f\u8fd9\u6837\u8868\u2f70\u7684\u3002\u56e0\u6b64, \u672a\u51b3\u548c\u963b\u585e\u6807\u5fd7\u53ef\u4ee5\u2f64\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578bsigset_t\u6765\u5b58\u50a8, , \u8fd9\u4e2a\u7c7b\u578b\u53ef\u4ee5\u8868\u2f70\u6bcf\u4e2a\u4fe1\u53f7\u7684\u201c\u6709\u6548\u201d\u6216\u201c\u2f46\u6548\u201d\u72b6\u6001, \u5728\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709\u6548\u201d\u548c\u201c\u2f46\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u88ab\u963b\u585e, \u2f7d\u5728\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709 \u6548\u201d\u548c\u201c\u2f46\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u5904\u4e8e\u672a\u51b3\u72b6\u6001\u3002\u963b\u585e\u4fe1\u53f7\u96c6\u4e5f\u53eb\u505a\u5f53\u524d\u8fdb\u7a0b\u7684 \u8fd9\u2fa5\u7684\u201c\u5c4f\u853d\u201d\u5e94\u8be5\u7406\u89e3\u4e3a\u963b\u585e\u2f7d\u4e0d\u662f\u5ffd\u7565\u3002<\/p>\n\n\n\n<p><strong>\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/strong><br>#i nclude <signal.h><\/p>\n\n\n\n<p>int sigemptyset(sigset_t *set);\u5c06\u4fe1\u53f7\u96c6 <code>set<\/code> \u6e05\u7a7a\uff0c\u5373\u4e0d\u5305\u542b\u4efb\u4f55\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p> int sigfillset(sigset_t *set); \u5c06\u4fe1\u53f7\u96c6 <code>set<\/code> \u586b\u6ee1\uff0c\u5373\u5305\u542b\u6240\u6709\u53ef\u80fd\u7684\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p>int sigaddset(sigset_t *set, int signo); \u5c06\u4fe1\u53f7 <code>signo<\/code> \u6dfb\u52a0\u5230\u4fe1\u53f7\u96c6 <code>set<\/code> \u4e2d<\/p>\n\n\n\n<p>int sigdelset(sigset_t *set, int signo);\u5c06\u4fe1\u53f7 <code>signo<\/code> \u4ece\u4fe1\u53f7\u96c6 <code>set<\/code> \u4e2d\u5220\u9664<\/p>\n\n\n\n<p>int sigismember(const sigset_t *set, int signo);\u5224\u65ad\u4fe1\u53f7 <code>signo<\/code> \u662f\u5426\u5728\u4fe1\u53f7\u96c6 <code>set<\/code> \u4e2d\u3002<\/p>\n\n\n\n<p><strong>sigprocmask<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include <signal.h>\nint sigprocmask(int how, const sigset_t *set, sigset_t *oset);<\/code><\/pre>\n\n\n\n<p>\u5982\u679coset\u662f\u2fae\u7a7a\u6307\u9488,\u5219\u8bfb\u53d6\u8fdb\u7a0b\u7684\u5f53\u524d\u4fe1\u53f7\u5c4f\u853d\u5b57\u901a\u8fc7oset\u53c2\u6570\u4f20\u51fa\u3002\u5982\u679cset\u662f\u2fae\u7a7a\u6307\u9488,\u5219 \u66f4\u6539\u8fdb\u7a0b\u7684\u4fe1 \u53f7\u5c4f\u853d\u5b57,\u53c2\u6570how\u6307\u2f70\u5982\u4f55\u66f4\u6539\u3002\u5982\u679coset\u548cset\u90fd\u662f\u2fae\u7a7a\u6307\u9488,\u5219\u5148\u5c06\u539f\u6765\u7684\u4fe1\u53f7 \u5c4f\u853d\u5b57\u5907\u4efd\u5230oset\u2fa5,\u7136\u540e \u6839\u636eset\u548chow\u53c2\u6570\u66f4\u6539\u4fe1\u53f7\u5c4f\u853d\u5b57\u3002\u5047\u8bbe\u5f53\u524d\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u4e3amask,\u4e0b\u8868\u8bf4\u660e\u4e86how\u53c2\u6570\u7684\u53ef\u9009\u503c\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"871\" height=\"180\" src=\"http:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-24.png\" alt=\"\" class=\"wp-image-282\" srcset=\"https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-24.png 871w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-24-300x62.png 300w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-24-768x159.png 768w\" sizes=\"auto, (max-width: 871px) 100vw, 871px\" \/><\/figure>\n\n\n\n<p><strong>sigpending<\/strong><\/p>\n\n\n\n<p>#include <signal.h> <\/p>\n\n\n\n<p>int sigpending(sigset_t *set);<\/p>\n\n\n\n<p>\u8bfb\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6,\u901a\u8fc7set\u53c2\u6570\u4f20\u51fa\u3002\u8c03\u2f64\u6210\u529f\u5219\u8fd4\u56de0,\u51fa\u9519\u5219\u8fd4\u56de-1<\/p>\n\n\n\n<p>\u4ee3\u7801\u4e3e\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main(){\n\/\/ 0. \u6355\u63492\u53f7\u4fe1\u53f7\nsignal(2, handler); \/\/ \u2f83\u5b9a\u4e49\u6355\u6349\/\/signal(2, SIG_IGN); \/\/ \u5ffd\u7565\u2f00\u4e2a\u4fe1\u53f7\/\/signal(2, SIG_DFL); \/\/ \u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\n\/\/ 1. \u5c4f\u853d2\u53f7\u4fe1\u53f7\nsigset_t block_set, old_set;sigemptyset(&block_set);\nsigemptyset(&old_set);\nsigaddset(&block_set, SIGINT); \nsigprocmask(SIG_BLOCK, &block_set, &old_set); \/\/ \u771f\u6b63\u7684\u4fee\u6539\u5f53\u524d\u8fdb\u2f8f\u7684\u5185\u6838block\u8868\uff0c\u5b8c\u6210\u4e86\u5bf92\u53f7\u4fe1\u53f7\u7684\u5c4f\u853d\uff01\nint cnt = 15;while (true){\n\/\/ 2. \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684pending\u4fe1\u53f7\u96c6\nsigset_t pending;sigpending(&pending);\n\/\/ 3. \u6253\u5370pending\u4fe1\u53f7\u96c6\nPrintPending(pending);cnt--;\n\/\/ 4. \u89e3\u9664\u5bf92\u53f7\u4fe1\u53f7\u7684\u5c4f\u853d\nif (cnt == 0){\nstd::cout << \"\u89e3\u9664\u5bf92\u53f7\u4fe1\u53f7\u7684\u5c4f\u853d!!!\" << std::endl;sigprocmask(SIG_SETMASK, &#038;old_set, &#038;block_set);\n} \nsleep(1);\n}<\/code><\/pre>\n\n\n\n<p>\u5f53\u88ab\u5c4f\u853d\u540e\u4f1a\u4e00\u76f4\u6253\u5370curr process[448336]pending: 0000000000000000000000000000010<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6355\u6349\u4fe1\u53f7<br><\/h2>\n\n\n\n<p>\u6355\u6349\u4fe1\u53f7\u6d41\u7a0b\u793a\u610f\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"943\" height=\"748\" src=\"http:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-25.png\" alt=\"\" class=\"wp-image-283\" srcset=\"https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-25.png 943w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-25-300x238.png 300w, https:\/\/www.tgwttt.xyz\/wp-content\/uploads\/2025\/08\/image-25-768x609.png 768w\" sizes=\"auto, (max-width: 943px) 100vw, 943px\" \/><\/figure>\n\n\n\n<p><strong>sigaction<\/strong><\/p>\n\n\n\n<p>#include <signal.h> int sigaction(int signo, const struct sigaction *act, struct sigaction *oact);<\/p>\n\n\n\n<p>\u4eca\u5929\u7684\u535a\u5ba2\u5c31\u5199\u5230\u8fd9\u91cc\uff0c\u5982\u6709\u9519\u8bef\u6b22\u8fce\u6307\u51fa\uff01\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u63a5\u4e0a\u7bc7\u6587\u7ae0\uff1ahttp:\/\/www.tgwttt.xyz\/?p=271 \u4fdd\u5b58\u4fe1\u53f7 \u4fe1\u53f7\u5176\u4ed6\u76f8\u5173\u5e38\u2ec5\u6982\u5ff5 \u2022 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":281,"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-280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/280","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=280"}],"version-history":[{"count":4,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/280\/revisions"}],"predecessor-version":[{"id":846,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/280\/revisions\/846"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/media\/281"}],"wp:attachment":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}