jehanne/qa/lib/newlib/209-sigwaitinfo.c

55 lines
988 B
C

#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
void catcher(int sig) {
printf("Signal catcher called for signal %d\n", sig);
}
void timestamp(char *str) {
time_t t;
time(&t);
printf("The time %s is %s", str, ctime(&t));
}
int main(int argc, char *argv[]) {
int result = 0;
int err = 0;
struct sigaction sigact;
sigset_t waitset;
siginfo_t info;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigact.sa_handler = catcher;
sigaction(SIGALRM, &sigact, NULL);
sigemptyset(&waitset);
sigaddset(&waitset, SIGALRM);
sigprocmask(SIG_BLOCK, &waitset, NULL);
alarm(3);
timestamp("before sigwaitinfo()");
result = sigwaitinfo(&waitset, &info);
err = errno;
timestamp("after sigwaitinfo()");
if(result > 0){
printf("sigwaitinfo() returned for signal %d\n", info.si_signo);
return 0;
}
printf("sigwaitinfo() returned %d; errno = %d\n", result, err);
perror("sigwaitinfo() function failed");
return 1;
}