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/* $OpenBSD: ptmget.c,v 1.2 2004/12/22 00:54:39 david Exp $ */
/*
* Written by Bob Beck <beck@openbsd.org> 2004 Public Domain.
* Basic test to ensure /dev/ptm works, and what it returns
* can be used via tty(4);
*/
#include <err.h>
#include <fcntl.h>
#include <grp.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/types.h>
#include <sys/stat.h>
int
main(int argc, char *argv[])
{
int fd;
struct ptmget ptm;
struct termios ti;
struct stat sb;
struct group *gr;
gid_t ttygid;
if ((gr = getgrnam("tty")) != NULL)
ttygid = gr->gr_gid;
else
ttygid = 4;
fd = open("/dev/ptm", O_RDWR, 0);
if (fd == -1)
err(1, "Can't open /dev/ptm");
if ((ioctl(fd, PTMGET, &ptm) == -1))
err(1, "ioctl PTMGET failed");
if ((tcgetattr(ptm.sfd, &ti) == -1))
err(1, "tcgetattr failed on slave");
if ((tcgetattr(ptm.cfd, &ti) == -1))
err(1, "tcgetattr failed on master");
if ((ioctl(ptm.sfd, TIOCSTOP) == -1))
err(1, "ioctl TIOCSTOP failed on slave");
if ((ioctl(ptm.cfd, TIOCSTOP) == -1))
err(1, "ioctl TIOCSTOP failed on master");
bzero(&sb, sizeof(sb));
if ((stat(ptm.sn, &sb) == -1))
err(1, "can't stat slave %s", ptm.sn);
if (sb.st_mode != (S_IFCHR | S_IWUSR | S_IRUSR | S_IWGRP))
errx(1, "Bad mode %o on %s, should be %o", sb.st_mode,
ptm.sn, (S_IFCHR | S_IWUSR | S_IRUSR | S_IWGRP));
if (sb.st_gid != ttygid)
errx(1, "%s gid is %d not the tty group(%d)", ptm.sn,
sb.st_gid, ttygid);
if (sb.st_uid != geteuid())
errx(1, "%s owned by %d, not the current user (%d)", ptm.sn,
sb.st_uid, geteuid());
return(0);
}
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