#include <sys/types.h>
#include <sys/wait.h>

#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv)
{
	int master, slave;
	char *slavename;

	// revoke(2) only works on character devices, so open a tty
	master = posix_openpt(O_NOCTTY | O_RDWR);
	assert(master >= 0);
	assert(0 == grantpt(master));
	slavename = ptsname(master);
	assert(NULL != slavename);

	//close stdout so we can reuse its filedesc
	assert(0 == close(STDIN_FILENO));
	slave = open(slavename, O_RDWR);
	if (slave < 0)
		err(1, "open slave");
	assert(STDIN_FILENO == slave);	//should reuse stdin

	// Revoke the slave device.
	// Now all open file descriptors referring to it will be invalid
	assert(0 == revoke(slavename));

	// Issue 649: Monit will assert with an error like this:
	// Standard filedescriptor open failed -- expected fd 0, got 3
	execlp("monit", "monit", "restart", "pubsubd", NULL);
	err(1, "execl returned");

	return(0);
}