标签：mask log html detail rom arc erro 实时 argv
参考链接:
信号内容具体分析: http://www.cnblogs.com/hoys/archive/2012/08/19/2646377.html
信号的例子介绍: http://blog.csdn.net/jnu_simba/article/details/8947652
信号值位于SIGRTMIN和SIGRTMAX为可靠信号，也为实时信号，支持排队操作， 其余为非可靠信号。
信号的简单例子:
#include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <signal.h> void SigSendTestMail(int signo) { printf("get signal:%d\n", signo); } int main(int argc, char const *argv[]) { printf("SIGRTMIN val:%d\n", SIGRTMIN); struct sigaction act; act.sa_handler = SigSendTestMail; act.sa_flags = 0; sigemptyset(&act.sa_mask); sigaction(SIGRTMIN+10, &act, 0); act.sa_handler = SigSendTestMail; act.sa_flags = 0; sigemptyset(&act.sa_mask); sigaction(SIGRTMIN+11, &act, 0); act.sa_handler = SigSendTestMail; act.sa_flags = 0; sigemptyset(&act.sa_mask); sigaction(SIGRTMIN+12, &act, 0); while(1) { sleep(3); } return 0; }
sigqueue结构体的使用:
#include <stdio.h> #include <unistd.h> #include <signal.h> #include <stdlib.h> void sighandler(int signo, siginfo_t *info,void *ctx); //给自身传递信息 int main(void) { struct sigaction act; act.sa_sigaction = sighandler; sigemptyset(&act.sa_mask); act.sa_flags = SA_SIGINFO;//信息传递开关 if(sigaction(42,&act,NULL) == -1){ perror("sigaction error"); exit(EXIT_FAILURE); } sleep(2); union sigval mysigval; mysigval.sival_int = 100; if(sigqueue(getpid(),42,mysigval) == -1){ perror("sigqueue error"); exit(EXIT_FAILURE); } return 0; } void sighandler(int signo, siginfo_t *info,void *ctx) { //以下两种方式都能获得sigqueue发来的数据 printf("receive the data from siqueue by info->si_int is %d\n",info->si_int); printf("receive the data from siqueue by info->si_value.sival_int is %d\n",info->si_value.sival_int); }
标签：mask log html detail rom arc erro 实时 argv
原文地址：http://www.cnblogs.com/hzijone/p/7591191.html
