计时器和信号出现问题

这对您有用吗？（修改了

timer_create

#include <stdlib.h>#include <unistd.h>#include <stdio.h>#include <signal.h>#include <time.h>#define CLOCKID CLOCK_REALTIME#define SIG SIGUSR1timer_t timerid;static void handler(int sig, siginfo_t *si, void *uc){    if(si->si_value.sival_ptr != &timerid){        printf("Stray signaln");    } else {        printf("Caught signal %d from timern", sig);    }}int main(int argc, char *argv[]){    struct sigevent sev;    struct itimerspec its;    long long freq_nanosecs;    sigset_t mask;    struct sigaction sa;    printf("Establishing handler for signal %dn", SIG);    sa.sa_flags = SA_SIGINFO;    sa.sa_sigaction = handler;    sigemptyset(&sa.sa_mask);    sigaction(SIG, &sa, NULL);    sev.sigev_notify = SIGEV_SIGNAL;    sev.sigev_signo = SIG;    sev.sigev_value.sival_ptr = &timerid;    timer_create(CLOCKID, &sev, &timerid);        its.it_value.tv_sec = 10;    its.it_value.tv_nsec = 0;    its.it_interval.tv_sec = its.it_value.tv_sec;    its.it_interval.tv_nsec = its.it_value.tv_nsec;    timer_settime(timerid, 0, &its, NULL);    sleep(100);    exit(EXIT_SUCCESS);}

当捕捉到来自定时器的信号时，

Caught signal 10 from timer

Stray signal