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/* $OpenBSD: closefrom.c,v 1.1 2004/01/15 22:22:52 marc Exp $ */
/* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
#include <errno.h>
#include <pthread.h>
#include <unistd.h>
#include "test.h"
static void *
dummy_thread(void* arg)
{
/* just exit */
return NULL;
}
/*
* Test that closefrom does the right thing in a threaded programs,
* specifically that it doesn't kill the thread kernel signal pipe.
*/
int
main(int argc, char *argv[])
{
pthread_t thread;
void *status;
int fd;
int result;
/* close files above stderr. The kernel pipes shouldn't be touched */
fd = STDERR_FILENO + 1;
result = closefrom(fd);
printf("closefrom(%d) == %d/%d\n", fd, result, errno);
/* do it again: make sure that the result is -1/EBADF */
result = closefrom(fd);
printf("closefrom(%d) == %d/%d\n", fd, result, errno);
ASSERT(result == -1 && errno == EBADF);
/* start a thread to verify the thread kernel is working */
CHECKr(pthread_create(&thread, NULL, dummy_thread, NULL));
CHECKr(pthread_join(thread, &status));
printf("dummy thread exited with status %p\n", status);
SUCCEED;
return 0;
}
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