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/* $OpenBSD: rfsharefd.c,v 1.3 2003/07/31 21:48:09 deraadt Exp $ */
/*
* Written by Artur Grabowski <art@openbsd.org>, 2002 Public Domain.
*/
#include <sys/param.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include <fcntl.h>
int
main(int argc, char *argv[])
{
int status;
int fd;
/* Make sure that at least fd 0 is allocated. */
if ((fd = open("/dev/null", O_RDONLY)) < 0)
err(1, "open(/dev/null)");
switch(rfork(RFPROC)) {
case -1:
err(1, "fork");
case 0:
if (close(fd) < 0)
_exit(1);
_exit(0);
}
if (wait(&status) < 0)
err(1, "wait");
if (!WIFEXITED(status))
err(1, "child error");
if (close(fd) == 0)
errx(1, "fd 0 not closed");
return WEXITSTATUS(status) != 0;
}
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