1 /* Test of lstat() function.
2 Copyright (C) 2008-2020 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Simon Josefsson, 2008; and Eric Blake, 2009. */
18
19 /* This file is designed to test both lstat(n,buf) and
20 fstatat(AT_FDCWD,n,buf,AT_SYMLINK_NOFOLLOW). FUNC is the function
21 to test. Assumes that BASE and ASSERT are already defined, and
22 that appropriate headers are already included. If PRINT, warn
23 before skipping symlink tests with status 77. */
24
25 static int
test_lstat_func(int (* func)(char const *,struct stat *),bool print)26 test_lstat_func (int (*func) (char const *, struct stat *), bool print)
27 {
28 struct stat st1;
29 struct stat st2;
30
31 /* Test for common directories. */
32 ASSERT (func (".", &st1) == 0);
33 ASSERT (func ("./", &st2) == 0);
34 #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
35 ASSERT (SAME_INODE (st1, st2));
36 #endif
37 ASSERT (S_ISDIR (st1.st_mode));
38 ASSERT (S_ISDIR (st2.st_mode));
39 ASSERT (func ("/", &st1) == 0);
40 ASSERT (func ("///", &st2) == 0);
41 #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
42 ASSERT (SAME_INODE (st1, st2));
43 #endif
44 ASSERT (S_ISDIR (st1.st_mode));
45 ASSERT (S_ISDIR (st2.st_mode));
46 ASSERT (func ("..", &st1) == 0);
47 ASSERT (S_ISDIR (st1.st_mode));
48
49 /* Test for error conditions. */
50 errno = 0;
51 ASSERT (func ("", &st1) == -1);
52 ASSERT (errno == ENOENT);
53 errno = 0;
54 ASSERT (func ("nosuch", &st1) == -1);
55 ASSERT (errno == ENOENT);
56 errno = 0;
57 ASSERT (func ("nosuch/", &st1) == -1);
58 ASSERT (errno == ENOENT);
59
60 ASSERT (close (creat (BASE "file", 0600)) == 0);
61 ASSERT (func (BASE "file", &st1) == 0);
62 ASSERT (S_ISREG (st1.st_mode));
63 errno = 0;
64 ASSERT (func (BASE "file/", &st1) == -1);
65 ASSERT (errno == ENOTDIR);
66
67 /* Now for some symlink tests, where supported. We set up:
68 link1 -> directory
69 link2 -> file
70 link3 -> dangling
71 link4 -> loop
72 then test behavior both with and without trailing slash.
73 */
74 if (symlink (".", BASE "link1") != 0)
75 {
76 ASSERT (unlink (BASE "file") == 0);
77 if (print)
78 fputs ("skipping test: symlinks not supported on this file system\n",
79 stderr);
80 return 77;
81 }
82 ASSERT (symlink (BASE "file", BASE "link2") == 0);
83 ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
84 ASSERT (symlink (BASE "link4", BASE "link4") == 0);
85
86 ASSERT (func (BASE "link1", &st1) == 0);
87 ASSERT (S_ISLNK (st1.st_mode));
88 ASSERT (func (BASE "link1/", &st1) == 0);
89 ASSERT (stat (BASE "link1", &st2) == 0);
90 ASSERT (S_ISDIR (st1.st_mode));
91 ASSERT (S_ISDIR (st2.st_mode));
92 #if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)
93 ASSERT (SAME_INODE (st1, st2));
94 #endif
95
96 ASSERT (func (BASE "link2", &st1) == 0);
97 ASSERT (S_ISLNK (st1.st_mode));
98 errno = 0;
99 ASSERT (func (BASE "link2/", &st1) == -1);
100 ASSERT (errno == ENOTDIR);
101
102 ASSERT (func (BASE "link3", &st1) == 0);
103 ASSERT (S_ISLNK (st1.st_mode));
104 errno = 0;
105 ASSERT (func (BASE "link3/", &st1) == -1);
106 ASSERT (errno == ENOENT);
107
108 ASSERT (func (BASE "link4", &st1) == 0);
109 ASSERT (S_ISLNK (st1.st_mode));
110 errno = 0;
111 ASSERT (func (BASE "link4/", &st1) == -1);
112 ASSERT (errno == ELOOP);
113
114 /* Cleanup. */
115 ASSERT (unlink (BASE "file") == 0);
116 ASSERT (unlink (BASE "link1") == 0);
117 ASSERT (unlink (BASE "link2") == 0);
118 ASSERT (unlink (BASE "link3") == 0);
119 ASSERT (unlink (BASE "link4") == 0);
120
121 return 0;
122 }
123