Linux下信号处理函数sigaction

//sigprof.c

/*************************************************************          FileName : sigprof.c      FileFunc : 2秒产生一次信号处理         Version  : V0.1          Author   : Sunrier          Date     : 2012-05-25      Descp    : Linux下信号处理      *************************************************************/#include <stdio.h>#include <sys/time.h>#include <signal.h>#include <stdlib.h>void sig_prof(int signo){printf("Signal is caught ! Signal number is %d !\n",signo);//system("./sig");}void init_sigaction( void ){struct sigaction act;act.sa_handler=sig_prof;act.sa_flags=0;sigemptyset(&act.sa_mask);//初始化信号集sigaction(SIGPROF,&act,NULL);//SIGPROF表示使用setitimer指定的Profiling Interval Timer所产生 }void init_time( void ){struct itimerval value;value.it_value.tv_sec=2;//秒value.it_value.tv_usec=0;//微秒value.it_interval=value.it_value;//间隔时间,如果不指定就只实现一次定时,如果it_value和it_interval两者都清零,则会清除定时器。 setitimer(ITIMER_PROF,&value,NULL);//ITIMER_PROF送出SIGPROF信号}int main(int argc,char *argv[]){init_sigaction();//初始化设置信号处理init_time();//精确定时while(1);return 0;//exit(0);}

[Sunrier@localhost Sig]$ gcc -o sig sigprof.c[Sunrier@localhost Sig]$ ./sigSignal is caught ! Signal number is 27 !Signal is caught ! Signal number is 27 !Signal is caught ! Signal number is 27 !Signal is caught ! Signal number is 27 !Signal is caught ! Signal number is 27 !Signal is caught ! Signal number is 27 !

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//sigalrm.c

/*************************************************************          FileName : sigalrm.c      FileFunc : 2秒产生一次信号处理         Version  : V0.1          Author   : Sunrier          Date     : 2012-05-25      Descp    : Linux下信号处理      *************************************************************/#include <stdio.h>#include <sys/time.h>#include <signal.h>#include <stdlib.h>void sig_prof(int signo){printf("Signal is caught ! Signal number is %d !\n",signo);//system("./sig");}void init_sigaction( void ){struct sigaction act;act.sa_handler=sig_prof;act.sa_flags=0;sigemptyset(&act.sa_mask);//初始化信号集//sigaction(SIGPROF,&act,NULL);//SIGPROF表示使用setitimer指定的Profiling Interval Timer所产生 sigaction(SIGALRM,&act,NULL);//用alarm函数设置的timer超时或setitimer函数设置的interval timer超时}void init_time( void ){struct itimerval value;value.it_value.tv_sec=2;//秒value.it_value.tv_usec=0;//微秒value.it_interval=value.it_value;//间隔时间,如果不指定就只实现一次定时,如果it_value和it_interval两者都清零,则会清除定时器。 //setitimer(ITIMER_PROF,&value,NULL);//ITIMER_PROF送出SIGPROF信号setitimer(ITIMER_REAL,&value,NULL);//ITIMER_REAL送出SIGALRM信号}int main(int argc,char *argv[]){init_sigaction();//初始化设置信号处理init_time();//精确定时while(1);return 0;//exit(0);}

[Sunrier@localhost Sig]$ gcc -o sig sigalrm.c[Sunrier@localhost Sig]$ ./sigSignal is caught ! Signal number is14 !Signal is caught ! Signal number is14 !Signal is caught ! Signal number is14 !Signal is caught ! Signal number is14 !Signal is caught ! Signal number is14 !Signal is caught ! Signal number is14 !

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可你仍然感谢天地和人世所带来的这些变化和发生。