用sigaction( )处理信号

sigaction函数的功能是检查或(/并)修改与指定信号相关联的处理动作.建议使用sigaction, 而不是signal函数, 后者较老,不可靠.

#include <signal.h>int sigaction( int signo, const struct sigaction *restrict act, struct sigaction *restrict oact);返回值：若成功则返回0，若出错则返回-1act指针非空, 则修改信号的动作;oact指针非空, 则返回该信号的上一个动作.

结构体介绍:struct sigaction {    void    (*sa_handler)(int);    /* addr of signal handler, or SIG_IGN, or SIG_DFL */    sigset_t    sa_mask;           /* additional signals to block */    int    sa_flags;               /* signal options */    /* alternate handler */    void    (*sa_sigaction)(int, siginfo_t *, void *);};

代码实例:

static int g_quit;static void handle_signal(int sig){if (SIGINT == sig || SIGTERM == sig)g_quit = 1;}static struct sigaction sigact = {.sa_handler = handle_signal,};int main(void) {int ret = 0;ret = sigaction(SIGINT, &sigact, NULL);ret |= sigaction(SIGTERM, &sigact, NULL);if (ret) {printf("%s line%d: %s\n",__FILE__, __LINE__, strerror(errno));return -1;}do {if (g_quit == 1)break;} while(1);return 0;}

参考: 信号之sigaction函数  http://www.cnblogs.com/nufangrensheng/p/3515945.html