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5554304f | 1 | /* Test glob danglin symlink match (BZ #866). |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
5554304f AZ |
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 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <stdio.h> | |
20 | #include <string.h> | |
21 | #include <stdlib.h> | |
22 | #include <errno.h> | |
23 | #include <unistd.h> | |
24 | #include <limits.h> | |
25 | #include <stddef.h> | |
26 | #include <glob.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/types.h> | |
29 | ||
30 | #include <support/check.h> | |
31 | #include <support/temp_file.h> | |
32 | ||
33 | static void do_prepare (int argc, char *argv[]); | |
34 | #define PREPARE do_prepare | |
35 | static int do_test (void); | |
36 | #include <support/test-driver.c> | |
37 | ||
38 | /* Maximum number of symlink calls for create_link function. */ | |
39 | #define MAX_CREATE_LINK_TRIES 10 | |
40 | ||
41 | static void | |
42 | create_link (const char *base, const char *fname, char *linkname, | |
43 | size_t linknamesize) | |
44 | { | |
45 | int ntries = 0; | |
46 | while (1) | |
47 | { | |
48 | snprintf (linkname, linknamesize, "%s/%s%02d", test_dir, base, | |
49 | ntries); | |
50 | if (symlink (fname, linkname) == 0) | |
51 | break; | |
52 | if (errno != EEXIST) | |
53 | FAIL_EXIT1 ("symlink failed: %m"); | |
54 | if (ntries++ == MAX_CREATE_LINK_TRIES) | |
55 | FAIL_EXIT1 ("symlink failed with EEXIST too many times"); | |
56 | } | |
57 | add_temp_file (linkname); | |
58 | } | |
59 | ||
01c7e549 ST |
60 | #ifndef PATH_MAX |
61 | # define PATH_MAX 1024 | |
62 | #endif | |
5554304f AZ |
63 | static char valid_link[PATH_MAX]; |
64 | static char dangling_link[PATH_MAX]; | |
65 | static char dangling_dir[PATH_MAX]; | |
66 | ||
67 | static void | |
68 | do_prepare (int argc, char *argv[]) | |
69 | { | |
70 | char *fname; | |
71 | ||
72 | create_temp_file ("tst-glob_symlinks.", &fname); | |
73 | ||
74 | /* Create an existing symlink. */ | |
75 | create_link ("valid-symlink-tst-glob_symlinks", fname, valid_link, | |
76 | sizeof valid_link); | |
77 | ||
78 | /* Create a dangling symlink to a file. */ | |
79 | int fd = create_temp_file ("dangling-tst-glob_file", &fname); | |
80 | TEST_VERIFY_EXIT (close (fd) == 0); | |
81 | /* It throws a warning at process end due 'add_temp_file' trying to | |
82 | unlink it again. */ | |
83 | TEST_VERIFY_EXIT (unlink (fname) == 0); | |
84 | create_link ("dangling-symlink-file-tst-glob", fname, dangling_link, | |
85 | sizeof dangling_link); | |
86 | ||
87 | /* Create a dangling symlink to a directory. */ | |
88 | char tmpdir[PATH_MAX]; | |
89 | snprintf (tmpdir, sizeof tmpdir, "%s/dangling-tst-glob_folder.XXXXXX", | |
90 | test_dir); | |
91 | TEST_VERIFY_EXIT (mkdtemp (tmpdir) != NULL); | |
92 | create_link ("dangling-symlink-dir-tst-glob", tmpdir, dangling_dir, | |
93 | sizeof dangling_dir); | |
94 | TEST_VERIFY_EXIT (rmdir (tmpdir) == 0); | |
95 | } | |
96 | ||
97 | static int | |
98 | do_test (void) | |
99 | { | |
5983df32 | 100 | char buf[PATH_MAX + 1]; |
5554304f AZ |
101 | glob_t gl; |
102 | ||
103 | TEST_VERIFY_EXIT (glob (valid_link, 0, NULL, &gl) == 0); | |
104 | TEST_VERIFY_EXIT (gl.gl_pathc == 1); | |
105 | TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], valid_link) == 0); | |
106 | globfree (&gl); | |
107 | ||
108 | TEST_VERIFY_EXIT (glob (dangling_link, 0, NULL, &gl) == 0); | |
109 | TEST_VERIFY_EXIT (gl.gl_pathc == 1); | |
110 | TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0); | |
111 | globfree (&gl); | |
112 | ||
113 | TEST_VERIFY_EXIT (glob (dangling_dir, 0, NULL, &gl) == 0); | |
114 | TEST_VERIFY_EXIT (gl.gl_pathc == 1); | |
115 | TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_dir) == 0); | |
116 | globfree (&gl); | |
117 | ||
118 | snprintf (buf, sizeof buf, "%s", dangling_link); | |
119 | buf[strlen(buf) - 1] = '?'; | |
120 | TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0); | |
121 | TEST_VERIFY_EXIT (gl.gl_pathc == 1); | |
122 | TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0); | |
123 | globfree (&gl); | |
124 | ||
125 | /* glob should handle dangling symbol as normal file, so <file>? should | |
126 | return an empty string. */ | |
127 | snprintf (buf, sizeof buf, "%s?", dangling_link); | |
128 | TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) != 0); | |
129 | globfree (&gl); | |
130 | ||
131 | snprintf (buf, sizeof buf, "%s*", dangling_link); | |
132 | TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0); | |
133 | TEST_VERIFY_EXIT (gl.gl_pathc == 1); | |
134 | TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0); | |
135 | globfree (&gl); | |
136 | ||
137 | return 0; | |
138 | } |