{"id":3431,"date":"2017-07-20T20:15:09","date_gmt":"2017-07-20T12:15:09","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3431"},"modified":"2017-07-20T20:15:09","modified_gmt":"2017-07-20T12:15:09","slug":"linux%e4%b8%8bc%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e4%bf%a1%e5%8f%b7%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3431.html","title":{"rendered":"Linux\u4e0bC\u8bed\u8a00\u4e2d\u7684\u4fe1\u53f7\u5904\u7406"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u5728\u5b88\u62a4\u8fdb\u7a0b\u4e2d\u9700\u8981\u5b9e\u73b0\u6839\u636e\u6536\u5230\u7684\u7279\u5b9a\u4fe1\u53f7\u505a\u7279\u5b9a\u64cd\u4f5c\u7684\u529f\u80fd\uff0c\u6240\u4ee5\u5728\u6b64\u5b66\u4e60\u6574\u7406\u4e00\u4e0bLinux\u4e0b\u4fe1\u53f7\u5904\u7406\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u65b9\u4fbf\u4ee5\u540e\u67e5\u9605\u3002<\/p>\n

\u6b63\u6587\uff1a<\/h4>\n

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n

Linux\u4e0b\u7684\u4fe1\u53f7\u5904\u7406\u6709 signal() \u548c sigaction() \u51fd\u6570\u3002\u63a8\u8350\u4f7f\u7528\u7b26\u5408 POSIX \u6807\u51c6\u7684\u00a0sigaction() \u51fd\u6570\u3002<\/strong><\/span><\/p>\n

signal() \u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u7b80\u5355\uff0c\u4f46\u5e76\u4e0d\u5c5e\u4e8e POSIX \u6807\u51c6\uff0c\u5728\u5404\u7c7b UNIX \u5e73\u53f0\u4e0a\u7684\u5b9e\u73b0\u4e0d\u5c3d\u76f8\u540c\uff0c\u56e0\u6b64\u5176\u7528\u9014\u53d7\u5230\u4e86\u4e00\u5b9a\u7684\u9650\u5236\u3002\u800c POSIX \u6807\u51c6\u5b9a\u4e49\u7684\u4fe1\u53f7\u5904\u7406\u63a5\u53e3\u662f sigaction() \u51fd\u6570\uff0c\u5176\u63a5\u53e3\u5934\u6587\u4ef6\u53ca\u539f\u578b\u5982\u4e0b\uff1a<\/p>\n

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\n\n\n\n
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#include <signal.h><\/code><\/div>\n
int<\/code>\u00a0sigaction(<\/code>int<\/code>\u00a0signum,\u00a0<\/code>const<\/code>\u00a0struct sigaction *act, struct sigaction *oldact);<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u25c6 signum \uff1a\u8981\u64cd\u4f5c\u7684\u4fe1\u53f7\u3002
\n\u25c6 act \uff1a\u8981\u8bbe\u7f6e\u7684\u5bf9\u4fe1\u53f7\u7684\u65b0\u5904\u7406\u65b9\u5f0f\u3002
\n\u25c6 oldact \uff1a\u539f\u6765\u5bf9\u4fe1\u53f7\u7684\u5904\u7406\u65b9\u5f0f\u3002
\n\u25c6 \u8fd4\u56de\u503c \uff1a0 \u8868\u793a\u6210\u529f\uff0c-1 \u8868\u793a\u6709\u9519\u8bef\u53d1\u751f\u3002<\/p>\n

struct sigaction \u7c7b\u578b\u7528\u6765\u63cf\u8ff0\u5bf9\u4fe1\u53f7\u7684\u5904\u7406\uff0c\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n

\n
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\n\n\n\n
\n
\n
struct sigaction<\/code><\/div>\n
{<\/code><\/div>\n
void<\/code>\u00a0(*sa_handler)(<\/code>int<\/code>);<\/code><\/div>\n
void<\/code>\u00a0(*sa_sigaction)(<\/code>int<\/code>, siginfo_t *,\u00a0<\/code>void<\/code>\u00a0*);<\/code><\/div>\n
sigset_t sa_mask;<\/code><\/div>\n
int<\/code>\u00a0sa_flags;<\/code><\/div>\n
void<\/code>\u00a0(*sa_restorer)(<\/code>void<\/code>);<\/code><\/div>\n
};<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u5728\u8fd9\u4e2a\u7ed3\u6784\u4f53\u4e2d\uff1a
\n\u6210\u5458 sa_handler \u662f\u4e00\u4e2a\u51fd\u6570\u6307\u9488<\/strong>\uff0c\u5176\u542b\u4e49\u4e0e signal \u51fd\u6570\u4e2d\u7684\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u7c7b\u4f3c\u3002<\/span>
\n\u6210\u5458 sa_sigaction \u5219\u662f\u53e6\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u51fd\u6570<\/strong>\uff0c\u5b83\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u53ef\u4ee5\u83b7\u5f97\u5173\u4e8e\u4fe1\u53f7\u7684\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f\u3002\u5f53 sa_flags \u6210\u5458\u7684\u503c\u5305\u542b\u4e86 SA_SIGINFO \u6807\u5fd7\u65f6\uff0c\u7cfb\u7edf\u5c06\u4f7f\u7528 sa_sigaction \u51fd\u6570\u4f5c\u4e3a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\uff0c\u5426\u5219\u4f7f\u7528 sa_handler \u4f5c\u4e3a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002\u5728\u67d0\u4e9b\u7cfb\u7edf\u4e2d\uff0c\u6210\u5458 sa_handler \u4e0e sa_sigaction \u88ab\u653e\u5728\u8054\u5408\u4f53\u4e2d\uff0c\u56e0\u6b64\u4f7f\u7528\u65f6\u4e0d\u8981\u540c\u65f6\u8bbe\u7f6e\u3002<\/strong>
\n\u6210\u5458 sa_mask \u7528\u6765\u6307\u5b9a\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u6267\u884c\u671f\u95f4\u9700\u8981\u88ab\u5c4f\u853d\u7684\u4fe1\u53f7<\/strong><\/span>\uff0c\u7279\u522b\u662f\u5f53\u67d0\u4e2a\u4fe1\u53f7\u88ab\u5904\u7406\u65f6\uff0c\u5b83\u81ea\u8eab\u4f1a\u88ab\u81ea\u52a8\u653e\u5165\u8fdb\u7a0b\u7684\u4fe1\u53f7\u63a9\u7801\uff0c\u56e0\u6b64\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u6267\u884c\u671f\u95f4\u8fd9\u4e2a\u4fe1\u53f7\u4e0d\u4f1a\u518d\u5ea6\u53d1\u751f\u3002
\n\u6210\u5458 sa_flags \u7528\u4e8e\u6307\u5b9a\u4fe1\u53f7\u5904\u7406\u7684\u884c\u4e3a<\/strong><\/span>\uff0c\u5b83\u53ef\u4ee5\u662f\u4e00\u4e0b\u503c\u7684\u201c\u6309\u4f4d\u6216\u201d\u7ec4\u5408\uff1a
\n\u25c6 SA_RESTART\uff1a\u4f7f\u88ab\u4fe1\u53f7\u6253\u65ad\u7684\u7cfb\u7edf\u8c03\u7528\u81ea\u52a8\u91cd\u65b0\u53d1\u8d77\u3002
\n\u25c6 SA_NOCLDSTOP\uff1a\u4f7f\u7236\u8fdb\u7a0b\u5728\u5b83\u7684\u5b50\u8fdb\u7a0b\u6682\u505c\u6216\u7ee7\u7eed\u8fd0\u884c\u65f6\u4e0d\u4f1a\u6536\u5230 SIGCHLD \u4fe1\u53f7\u3002
\n\u25c6 SA_NOCLDWAIT\uff1a\u4f7f\u7236\u8fdb\u7a0b\u5728\u5b83\u7684\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6\u4e0d\u4f1a\u6536\u5230 SIGCHLD \u4fe1\u53f7\uff0c\u8fd9\u65f6\u5b50\u8fdb\u7a0b\u5982\u679c\u9000\u51fa\u4e5f\u4e0d\u4f1a\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b\u3002
\n\u25c6 SA_NODEFER\uff1a\u4f7f\u5bf9\u4fe1\u53f7\u7684\u5c4f\u853d\u65e0\u6548\uff0c\u5373\u5728\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u6267\u884c\u671f\u95f4\u4ecd\u80fd\u53d1\u51fa\u8fd9\u4e2a\u4fe1\u53f7\u3002
\n\u25c6 SA_RESETHAND\uff1a\u4fe1\u53f7\u5904\u7406\u4e4b\u540e\u91cd\u65b0\u8bbe\u7f6e\u4e3a\u9ed8\u8ba4\u7684\u5904\u7406\u65b9\u5f0f\u3002
\n\u25c6 SA_SIGINFO\uff1a\u4f7f\u7528 sa_sigaction \u6210\u5458\u800c\u4e0d\u662f sa_handler \u4f5c\u4e3a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002
\n\u6210\u5458 re_restorer \u5219\u662f\u4e00\u4e2a\u5df2\u7ecf\u5e9f\u5f03\u7684\u6570\u636e\u57df<\/strong>\uff0c\u4e0d\u8981\u4f7f\u7528\u3002<\/p>\n

\u4e0b\u9762\u4ee5\u4e00\u4e2a\u5b9e\u9645\u6837\u4f8b\u6765\u8bf4\u660esigaction()\u51fd\u6570\u7684\u4f7f\u7528\uff1a<\/p>\n

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#include <stdio.h><\/code><\/div>\n
#include <unistd.h><\/code><\/div>\n
#include <signal.h><\/code><\/div>\n
#include <errno.h><\/code><\/div>\n
<\/div>\n
static<\/code>\u00a0void<\/code>\u00a0sig_usr(<\/code>int<\/code>\u00a0signum)<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>(signum == SIGUSR1)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"SIGUSR1 received\\n\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>else<\/code>\u00a0if<\/code>(signum == SIGUSR2)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"SIGUSR2 received\\n\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>else<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"signal %d received\\n\"<\/code>, signum);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
}<\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0main(<\/code>void<\/code>)<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0buf[<\/code>512<\/code>];<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0\u00a0n;<\/code><\/div>\n
\/*<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigset_t mask;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigfillset(&mask); \/\/\u5c06\u53c2\u6570 mask \u4fe1\u53f7\u96c6\u521d\u59cb\u5316\uff0c\u7136\u540e\u628a\u6240\u6709\u7684\u4fe1\u53f7\u52a0\u5165\u5230\u6b64\u4fe1\u53f7\u96c6\u91cc\uff0c\u5728\u8fd9\u91cc\u8868\u793a\u5c4f\u853d\u6240\u6709\u4fe1\u53f7<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigdelset(&mask, SIGUSR1); \/\/\u5220\u9664set\u4e2d\u7684SIGUSR1\u4fe1\u53f7\uff0c\u5373\u2014\u2014\u4e0d\u5c4f\u853dSIGUSR1\u4fe1\u53f7<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigdelset(&mask, SIGUSR2); \/\/\u4e0d\u5c4f\u853dSIGUSR2\u4fe1\u53f7<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigprocmask(SIG_SETMASK, &mask, NULL); \/\/\u53c2\u6570SIG_SETMASK\u6307\u5b9a\u5c4f\u853dmask\u4e2d\u5305\u542b\u7684\u4fe1\u53f7\u96c6<\/code><\/div>\n
*\/<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>struct sigaction sa_usr;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sa_usr.sa_flags =\u00a0<\/code>0<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sa_usr.sa_handler = sig_usr;\u00a0\u00a0\u00a0<\/code>\/\/\u4fe1\u53f7\u5904\u7406\u51fd\u6570<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigaction(SIGUSR1, &sa_usr, NULL);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>sigaction(SIGUSR2, &sa_usr, NULL);<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"My PID is %d\\n\"<\/code>, getpid());<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>while<\/code>(<\/code>1<\/code>)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>((n = read(STDIN_FILENO, buf,\u00a0<\/code>511<\/code>)) == -<\/code>1<\/code>)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>(errno == EINTR)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"read is interrupted by signal\\n\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>else<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>buf[n] =\u00a0<\/code>'\\0'<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"%d bytes read: %s\\n\"<\/code>, n, buf);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a00<\/code>;<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u4f7f\u7528 sigaction \u51fd\u6570\u4e3a SIGUSR1 \u548c SIGUSR2 \u4fe1\u53f7\u6ce8\u518c\u4e86\u5904\u7406\u51fd\u6570\uff0c\u7136\u540e\u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u5165\u5b57\u7b26\u3002\u7a0b\u5e8f\u8fd0\u884c\u540e\u9996\u5148\u8f93\u51fa\u81ea\u5df1\u7684 PID\uff0c\u5982\uff1a
\nMy PID is 5904<\/p>\n

\u8fd9\u65f6\u5982\u679c\u4ece\u53e6\u5916\u4e00\u4e2a\u7ec8\u7aef\u5411\u8fdb\u7a0b\u53d1\u9001 SIGUSR1 \u6216 SIGUSR2 \u4fe1\u53f7\uff0c\u7528\u7c7b\u4f3c\u5982\u4e0b\u7684\u547d\u4ee4\uff1a
\nkill -USR1 5904<\/p>\n

\u5219\u7a0b\u5e8f\u5c06\u7ee7\u7eed\u8f93\u51fa\u5982\u4e0b\u5185\u5bb9\uff1a
\nSIGUSR1 received
\nread is interrupted by signal<\/p>\n

\u8fd9\u8bf4\u660e\u7528 sigaction \u6ce8\u518c\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u65f6\uff0c\u4e0d\u4f1a\u81ea\u52a8\u91cd\u65b0\u53d1\u8d77\u88ab\u4fe1\u53f7\u6253\u65ad\u7684\u7cfb\u7edf\u8c03\u7528\u3002\u5982\u679c\u9700\u8981\u81ea\u52a8\u91cd\u65b0\u53d1\u8d77\uff0c\u5219\u8981\u8bbe\u7f6e SA_RESTART \u6807\u5fd7\uff0c\u6bd4\u5982\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\u53ef\u4ee5\u8fdb\u884c\u7c7b\u4f3c\u4e00\u4e0b\u7684\u8bbe\u7f6e\uff1a
\nsa_usr.sa_flags = SA_RESTART;<\/p>\n

\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n

Linux \u8fdb\u7a0b\u5b66\u4e60\uff08\u56db\uff09—— sigaction \u51fd\u6570<\/strong>\u00a0#\u7b80\u5355\u660e\u4e86
\nhttp:\/\/www.cnblogs.com\/wblyuyang\/archive\/2012\/11\/13\/2768923.html<\/a><\/p>\n

Linux\u4e0b\u7684\u4fe1\u53f7\u8be6\u89e3\u53ca\u6355\u6349\u4fe1\u53f7<\/strong>\u00a0#\u5168\u9762
\nhttp:\/\/www.jb51.net\/article\/90695.htm<\/a><\/p>\n

\u5982\u4f55\u5ffd\u7565(\u9664\u4e86 SIGKILL \u548c SIGSTOP \u4e4b\u5916\u7684)\u6240\u6709\u4fe1\u53f7
\nhttps:\/\/stackoverflow.com\/questions\/10046916\/is-it-possible-to-ignore-all-signals<\/a><\/p>\n

linux\u7cfb\u7edf\u7f16\u7a0b\u4e4b\u4fe1\u53f7\uff08\u4e94\uff09\uff1a\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570\uff0c\u4fe1\u53f7\u963b\u585e\u4e0e\u672a\u51b3<\/strong>
\nhttp:\/\/www.cnblogs.com\/mickole\/p\/3191281.html<\/a><\/p>\n

\u5173\u4e8eLinux\u4fe1\u53f7\u7684\u4e00\u5207(All about Linux signals)<\/strong>\u00a0#\u5168\u9762\u7ec6\u81f4
\nhttp:\/\/www.linuxprogrammingblog.com\/all-about-linux-signals?page=show<\/a><\/p>\n

Linux \u4fe1\u53f7\u5904\u7406
\nhttps:\/\/fixatom.com\/deal-with-linux-signals\/<\/a><\/p>\n

http:\/\/man7.org\/linux\/man-pages\/man2\/sigaction.2.html<\/a>
\nhttp:\/\/man7.org\/linux\/man-pages\/man3\/sigfillset.3.html<\/a>
\nhttp:\/\/man7.org\/linux\/man-pages\/man2\/sigprocmask.2.html<\/a>
\nhttps:\/\/stackoverflow.com\/questions\/27227585\/what-is-sigaddset-used-for<\/a><\/p>\n

linux c\u5b66\u4e60\u7b14\u8bb0—-\u4fe1\u53f7(sigaction,sigaddset,sigprocmask)
\nhttp:\/\/lobert.iteye.com\/blog\/1739021<\/a><\/p>\n

C\u8bed\u8a00\u4fe1\u53f7\u5904\u7406\u51fd\u6570
\nhttp:\/\/c.biancheng.net\/cpp\/u\/hs9\/<\/a><\/p>\n

Unix signal handling example in C, SIGINT, SIGALRM, SIGHUP…
\nhttps:\/\/gist.githubusercontent.com\/aspyct\/3462238\/raw\/3498fff4351518d8d40592015a9d3b5b9c22f7d5\/signal.c<\/a><\/p>\n

Signal Handling in C
\nhttps:\/\/stackoverflow.com\/questions\/2485028\/signal-handling-in-c<\/a><\/p>\n

24 Signal Handling
\nhttps:\/\/www.gnu.org\/software\/libc\/manual\/html_node\/Signal-Handling.html<\/a><\/p>\n

Linux C\u5b9e\u8df5(1)\uff1a\u4e0d\u53ef\u5ffd\u7565\u6216\u6355\u6349\u7684\u4fe1\u53f7\u2014SIGSTOP\u548cSIGKILL
\nhttp:\/\/blog.csdn.net\/madpointer\/article\/details\/13091705<\/a><\/p>\n

Linux\u8fdb\u7a0b\u95f4\u901a\u4fe1(\u56db)—\u4fe1\u53f7\u901a\u4fe1\u4e4b\u4fe1\u53f7\u53d1\u9001\u6355\u6349kill()\u3001raise()\u3001alarm()\u3001pause()\u53ca\u5176\u57fa\u7840\u5b9e\u9a8c
\nhttp:\/\/www.cnblogs.com\/dyllove98\/archive\/2013\/06\/12\/3132798.html<\/a>
\nhttp:\/\/blog.csdn.net\/mybelief321\/article\/details\/9078193<\/a><\/p>\n

Can signal be ignored (lost)?
\nhttps:\/\/unix.stackexchange.com\/questions\/181433\/can-signal-be-ignored-lost<\/a><\/p>\n

=END=<\/p>\n","protected":false},"excerpt":{"rendered":"

=Start= \u7f18\u7531\uff1a \u5728\u5b88\u62a4\u8fdb\u7a0b\u4e2d\u9700\u8981\u5b9e\u73b0\u6839\u636e\u6536\u5230\u7684\u7279\u5b9a\u4fe1\u53f7\u505a\u7279\u5b9a\u64cd\u4f5c\u7684\u529f\u80fd\uff0c\u6240\u4ee5\u5728\u6b64\u5b66\u4e60\u6574\u7406\u4e00\u4e0bLinux […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11,7],"tags":[100,30,863,862],"class_list":["post-3431","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-programing","tag-c","tag-linux","tag-sigaction","tag-signal"],"views":3865,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3431","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=3431"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3431\/revisions"}],"predecessor-version":[{"id":3432,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3431\/revisions\/3432"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=3431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=3431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=3431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}