117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* Test for grantpt, unlockpt error corner cases.
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Copyright (C) 2001-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <support/check.h>
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#include <support/temp_file.h>
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#include <support/xunistd.h>
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/* Test grantpt, unlockpt with a closed descriptor. */
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static void
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test_ebadf (void)
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{
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int fd, ret, err;
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fd = posix_openpt (O_RDWR);
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if (fd == -1)
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FAIL_EXIT1 ("posix_openpt(O_RDWR) failed\nerrno %d (%m)\n", errno);
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TEST_COMPARE (unlockpt (fd), 0);
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xclose (fd);
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ret = grantpt (fd);
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err = errno;
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if (ret != -1 || err != EBADF)
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{
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support_record_failure ();
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printf ("grantpt(): expected: return = %d, errno = %d\n", -1, EBADF);
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printf (" got: return = %d, errno = %d\n", ret, err);
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}
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TEST_COMPARE (unlockpt (fd), -1);
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TEST_COMPARE (errno, EBADF);
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}
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/* Test grantpt, unlockpt on a regular file. */
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static void
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test_einval (void)
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{
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int fd, ret, err;
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fd = create_temp_file ("tst-grantpt-", NULL);
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TEST_VERIFY_EXIT (fd >= 0);
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ret = grantpt (fd);
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err = errno;
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if (ret != -1 || err != EINVAL)
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{
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support_record_failure ();
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printf ("grantpt(): expected: return = %d, errno = %d\n", -1, EINVAL);
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printf (" got: return = %d, errno = %d\n", ret, err);
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}
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TEST_COMPARE (unlockpt (fd), -1);
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TEST_COMPARE (errno, EINVAL);
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xclose (fd);
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}
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/* Test grantpt, unlockpt on a non-ptmx pseudo-terminal. */
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static void
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test_not_ptmx (void)
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{
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int ptmx = posix_openpt (O_RDWR);
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TEST_VERIFY_EXIT (ptmx >= 0);
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TEST_COMPARE (grantpt (ptmx), 0);
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TEST_COMPARE (unlockpt (ptmx), 0);
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/* A second unlock succeeds as well. */
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TEST_COMPARE (unlockpt (ptmx), 0);
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const char *name = ptsname (ptmx);
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TEST_VERIFY_EXIT (name != NULL);
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int pts = open (name, O_RDWR | O_NOCTTY);
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TEST_VERIFY_EXIT (pts >= 0);
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TEST_COMPARE (grantpt (pts), -1);
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TEST_COMPARE (errno, EINVAL);
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TEST_COMPARE (unlockpt (pts), -1);
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TEST_COMPARE (errno, EINVAL);
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xclose (pts);
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xclose (ptmx);
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}
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static int
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do_test (void)
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{
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test_ebadf ();
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test_einval ();
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test_not_ptmx ();
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return 0;
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}
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#include <support/test-driver.c>
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