pid_t
__wait(int *istat)
{
#ifdef VARIANT_CANCELABLE
return (__wait4(WAIT_ANY, istat, 0, (struct rusage *)0));
#else /* !VARIANT_CANCELABLE */
return (__wait4_nocancel(WAIT_ANY, istat, 0, (struct rusage *)0));
#endif /* VARIANT_CANCELABLE */
}
int __libc_system(const char *command)
{
int wait_val, pid;
struct sigaction sa, save_quit, save_int;
sigset_t save_mask;
if (command == 0)
return 1;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
/* __sigemptyset(&sa.sa_mask); - done by memset() */
/* sa.sa_flags = 0; - done by memset() */
sigaction(SIGQUIT, &sa, &save_quit);
sigaction(SIGINT, &sa, &save_int);
__sigaddset(&sa.sa_mask, SIGCHLD);
sigprocmask(SIG_BLOCK, &sa.sa_mask, &save_mask);
if ((pid = vfork()) < 0) {
wait_val = -1;
goto out;
}
if (pid == 0) {
sigaction(SIGQUIT, &save_quit, NULL);
sigaction(SIGINT, &save_int, NULL);
sigprocmask(SIG_SETMASK, &save_mask, NULL);
execl("/bin/sh", "sh", "-c", command, (char *) 0);
_exit(127);
}
#if 0
__printf("Waiting for child %d\n", pid);
#endif
if (__wait4_nocancel(pid, &wait_val, 0, 0) == -1)
wait_val = -1;
out:
sigaction(SIGQUIT, &save_quit, NULL);
sigaction(SIGINT, &save_int, NULL);
sigprocmask(SIG_SETMASK, &save_mask, NULL);
return wait_val;
}