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/* Test of login_tty() function.
Copyright (C) 2010-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <utmp.h>
#include <errno.h>
#include <pty.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
int
main ()
{
int master;
int slave;
/* Open a pseudo-terminal, as a master-slave pair. */
{
int res = openpty (&master, &slave, NULL, NULL, NULL);
if (res != 0)
{
fprintf (stderr, "openpty returned %d\n", res);
return 1;
}
}
/* Create a new session and make it the controlling tty of this session. */
{
int res = login_tty (slave);
if (res < 0)
{
fprintf (stderr, "login_tty failed\n");
return 1;
}
}
/* From here on, we cannot use stderr for error messages any more.
If a test fails, write error information into a file named 'err',
then abort. */
/* Check that fd = 0, 1, 2 are now open to the controlling terminal for the
current process and that it is a session of its own. */
{
int fd;
for (fd = 0; fd < 3; fd++)
if (!(tcgetpgrp (fd) == getpid ()))
{
freopen ("err", "w+", stderr);
fprintf (stderr, "tcgetpgrp(%d) = %ld whereas getpid() = %ld\n",
fd, (long) tcgetpgrp (fd), (long) getpid ());
fflush (stderr);
abort ();
}
for (fd = 0; fd < 3; fd++)
{
pid_t sid = tcgetsid (fd);
if (sid == -1)
{
if (!(errno == ENOSYS))
{
freopen ("err", "w+", stderr);
fprintf (stderr, "tcgetsid(%d) = -1 and errno = %d\n",
fd, errno);
fflush (stderr);
abort ();
}
}
else
{
if (!(sid == getpid ()))
{
freopen ("err", "w+", stderr);
fprintf (stderr, "tcgetsid(%d) = %ld whereas getpid() = %ld\n",
fd, (long) tcgetsid (fd), (long) getpid ());
fflush (stderr);
abort ();
}
}
}
}
return 0;
}
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