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- #include <sys/syscall.h>
- #include <pthread.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <signal.h>
- volatile bool g_terminate = false;
- static void* signal_thread(void*)
- {
- //设置该子线程可以接收的信号:SIGINT SIGQUIT SIGTERM
- sigset_t mark;
- sigemptyset(&mark);
- sigaddset(&mark, SIGINT);
- sigaddset(&mark, SIGQUIT);
- sigaddset(&mark, SIGTERM);
-
- int signal;
- int rlt = sigwait(&mark, &signal);
- if (0 != rlt)
- {
- printf("sigwait error: %d", rlt);
- return (void*)0;
- }
- printf("[tid=%d] recv terminate signal: %d\n", (int)syscall(SYS_gettid), signal);
- if (!g_terminate)
- {
- g_terminate = true;
- }
- return (void*)0;
- }
- int main(int argc, char** argv)
- {
- printf("[tid=%d] main thread\n", (int)syscall(SYS_gettid));
- //所有线程都忽略这些信号:SIGHUP SIGPIPE
- signal(SIGHUP, SIG_IGN);
- signal(SIGPIPE, SIG_IGN);
- //主线程屏蔽这些信号:SIGINT SIGQUIT SIGTERM
- sigset_t mark;
- sigemptyset(&mark);
- sigaddset(&mark, SIGINT);
- sigaddset(&mark, SIGQUIT);
- sigaddset(&mark, SIGTERM);
- pthread_sigmask(SIG_SETMASK, &mark, NULL);
- //创建子线程,让它来接收这些信号:SIGINT SIGQUIT SIGTERM
- pthread_t thread;
- pthread_create(&thread, NULL, &signal_thread, NULL);
- sleep(10);
- if (g_terminate)
- {
- //处理一些不可重入的函数
复制代码 执行命令:
ps aux | grep 'test' | grep -v 'grep' | awk '{print $2}' | xargs kill -s 2
目的是不想让主线程收到信号2,而是子线程收到
因为收到信号后,我必须要处理一些不可重入的函数!
但实际情况,我这样写还是主线程收到,子线程收不到,不知道写错了,望指教!!!
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