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/* $OpenBSD: signal.c,v 1.3 2001/11/11 23:26:35 deraadt Exp $ */
/* David Leonard <d@openbsd.org>, 2001. Public Domain. */
/*
* This program tests signal handler re-entrancy.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include "test.h"
volatile int alarmed;
void *
sleeper(arg)
void *arg;
{
sigset_t mask;
/* Ignore all signals in this thread */
sigfillset(&mask);
CHECKe(sigprocmask(SIG_SETMASK, &mask, NULL));
ASSERT(sleep(3) == 0);
SUCCEED;
}
void
handler(sig)
int sig;
{
int save_errno = errno;
alarmed = 1;
alarm(1);
signal(SIGALRM, handler);
errno = save_errno;
}
int
main()
{
pthread_t slpr;
ASSERT(signal(SIGALRM, handler) != SIG_ERR);
CHECKe(alarm(1));
CHECKr(pthread_create(&slpr, NULL, sleeper, NULL));
/* ASSERT(sleep(1) == 0); */
for (;;) {
if (alarmed) {
alarmed = 0;
CHECKe(write(STDOUT_FILENO, "!", 1));
}
}
}
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