1 | /* Test for grantpt, unlockpt error corner cases. |
2 | Copyright (C) 2001-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sys/types.h> |
20 | #include <sys/stat.h> |
21 | #include <fcntl.h> |
22 | #include <stdio.h> |
23 | #include <stdlib.h> |
24 | #include <errno.h> |
25 | #include <string.h> |
26 | #include <unistd.h> |
27 | #include <support/check.h> |
28 | #include <support/temp_file.h> |
29 | #include <support/xunistd.h> |
30 | |
31 | /* Test grantpt, unlockpt with a closed descriptor. */ |
32 | static void |
33 | test_ebadf (void) |
34 | { |
35 | int fd, ret, err; |
36 | |
37 | fd = posix_openpt (O_RDWR); |
38 | if (fd == -1) |
39 | FAIL_EXIT1 ("posix_openpt(O_RDWR) failed\nerrno %d (%m)\n" , errno); |
40 | TEST_COMPARE (unlockpt (fd), 0); |
41 | |
42 | xclose (fd); |
43 | ret = grantpt (fd); |
44 | err = errno; |
45 | if (ret != -1 || err != EBADF) |
46 | { |
47 | support_record_failure (); |
48 | printf (format: "grantpt(): expected: return = %d, errno = %d\n" , -1, EBADF); |
49 | printf (format: " got: return = %d, errno = %d\n" , ret, err); |
50 | } |
51 | |
52 | TEST_COMPARE (unlockpt (fd), -1); |
53 | TEST_COMPARE (errno, EBADF); |
54 | } |
55 | |
56 | /* Test grantpt, unlockpt on a regular file. */ |
57 | static void |
58 | test_einval (void) |
59 | { |
60 | int fd, ret, err; |
61 | |
62 | fd = create_temp_file (base: "tst-grantpt-" , NULL); |
63 | TEST_VERIFY_EXIT (fd >= 0); |
64 | |
65 | ret = grantpt (fd); |
66 | err = errno; |
67 | if (ret != -1 || err != EINVAL) |
68 | { |
69 | support_record_failure (); |
70 | printf (format: "grantpt(): expected: return = %d, errno = %d\n" , -1, EINVAL); |
71 | printf (format: " got: return = %d, errno = %d\n" , ret, err); |
72 | } |
73 | |
74 | TEST_COMPARE (unlockpt (fd), -1); |
75 | TEST_COMPARE (errno, EINVAL); |
76 | |
77 | xclose (fd); |
78 | } |
79 | |
80 | /* Test grantpt, unlockpt on a non-ptmx pseudo-terminal. */ |
81 | static void |
82 | test_not_ptmx (void) |
83 | { |
84 | int ptmx = posix_openpt (O_RDWR); |
85 | TEST_VERIFY_EXIT (ptmx >= 0); |
86 | TEST_COMPARE (grantpt (ptmx), 0); |
87 | TEST_COMPARE (unlockpt (ptmx), 0); |
88 | |
89 | /* A second unlock succeeds as well. */ |
90 | TEST_COMPARE (unlockpt (ptmx), 0); |
91 | |
92 | const char *name = ptsname (fd: ptmx); |
93 | TEST_VERIFY_EXIT (name != NULL); |
94 | int pts = open (file: name, O_RDWR | O_NOCTTY); |
95 | TEST_VERIFY_EXIT (pts >= 0); |
96 | |
97 | TEST_COMPARE (grantpt (pts), -1); |
98 | TEST_COMPARE (errno, EINVAL); |
99 | |
100 | TEST_COMPARE (unlockpt (pts), -1); |
101 | TEST_COMPARE (errno, EINVAL); |
102 | |
103 | xclose (pts); |
104 | xclose (ptmx); |
105 | } |
106 | |
107 | static int |
108 | do_test (void) |
109 | { |
110 | test_ebadf (); |
111 | test_einval (); |
112 | test_not_ptmx (); |
113 | return 0; |
114 | } |
115 | |
116 | #include <support/test-driver.c> |
117 | |