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/* Test of ttyname_r(3).
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>
#include <unistd.h>
#include "signature.h"
SIGNATURE_CHECK (ttyname_r, int, (int, char *, size_t));
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include "macros.h"
int
main (void)
{
int fd;
char buf[100];
/* Open the controlling tty of the current process. */
fd = open ("/dev/tty", O_RDONLY);
if (fd < 0)
{
fprintf (stderr, "Skipping test: cannot open controlling tty\n");
return 77;
}
ASSERT (ttyname_r (fd, buf, 1) == ERANGE);
ASSERT (ttyname_r (fd, buf, sizeof (buf)) == 0);
ASSERT (memcmp (buf, "/dev/", 5) == 0);
/* Test behaviour for invalid file descriptors. */
{
int err = ttyname_r (-1, buf, sizeof (buf));
ASSERT (err == EBADF
|| err == ENOTTY /* seen on FreeBSD 6.4 */
);
}
{
int err;
close (99);
err = ttyname_r (99, buf, sizeof (buf));
ASSERT (err == EBADF
|| err == ENOTTY /* seen on FreeBSD 6.4 */
);
}
return 0;
}
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