summaryrefslogtreecommitdiff
path: root/posix/tst-glob_symlinks.c
blob: df3baa87571d3a77f89f3a24b756bf8d47d15220 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/* Test glob danglin symlink match (BZ #866).
   Copyright (C) 2017-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <limits.h>
#include <stddef.h>
#include <glob.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <support/check.h>
#include <support/temp_file.h>

static void do_prepare (int argc, char *argv[]);
#define PREPARE do_prepare
static int do_test (void);
#include <support/test-driver.c>

/* Maximum number of symlink calls for create_link function.  */
#define MAX_CREATE_LINK_TRIES 10

static void
create_link (const char *base, const char *fname, char *linkname,
	     size_t linknamesize)
{
  int ntries = 0;
  while (1)
    {
      snprintf (linkname, linknamesize, "%s/%s%02d", test_dir, base,
		ntries);
      if (symlink (fname, linkname) == 0)
	break;
      if (errno != EEXIST)
	FAIL_EXIT1 ("symlink failed: %m");
      if (ntries++ == MAX_CREATE_LINK_TRIES)
	FAIL_EXIT1 ("symlink failed with EEXIST too many times");
    }
  add_temp_file (linkname);
}

#ifndef PATH_MAX
# define PATH_MAX 1024
#endif
static char valid_link[PATH_MAX];
static char dangling_link[PATH_MAX];
static char dangling_dir[PATH_MAX];

static void
do_prepare (int argc, char *argv[])
{
  char *fname;

  create_temp_file ("tst-glob_symlinks.", &fname);

  /* Create an existing symlink.  */
  create_link ("valid-symlink-tst-glob_symlinks", fname, valid_link,
	       sizeof valid_link);

  /* Create a dangling symlink to a file.  */
  int fd = create_temp_file ("dangling-tst-glob_file", &fname);
  TEST_VERIFY_EXIT (close (fd) == 0);
  /* It throws a warning at process end due 'add_temp_file' trying to
     unlink it again.  */
  TEST_VERIFY_EXIT (unlink (fname) == 0);
  create_link ("dangling-symlink-file-tst-glob", fname, dangling_link,
	       sizeof dangling_link);

  /* Create a dangling symlink to a directory.  */
  char tmpdir[PATH_MAX];
  snprintf (tmpdir, sizeof tmpdir, "%s/dangling-tst-glob_folder.XXXXXX",
	    test_dir);
  TEST_VERIFY_EXIT (mkdtemp (tmpdir) != NULL);
  create_link ("dangling-symlink-dir-tst-glob", tmpdir, dangling_dir,
	       sizeof dangling_dir);
  TEST_VERIFY_EXIT (rmdir (tmpdir) == 0);
}

static int
do_test (void)
{
  char buf[PATH_MAX + 1];
  glob_t gl;

  TEST_VERIFY_EXIT (glob (valid_link, 0, NULL, &gl) == 0);
  TEST_VERIFY_EXIT (gl.gl_pathc == 1);
  TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], valid_link) == 0);
  globfree (&gl);

  TEST_VERIFY_EXIT (glob (dangling_link, 0, NULL, &gl) == 0);
  TEST_VERIFY_EXIT (gl.gl_pathc == 1);
  TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
  globfree (&gl);

  TEST_VERIFY_EXIT (glob (dangling_dir, 0, NULL, &gl) == 0);
  TEST_VERIFY_EXIT (gl.gl_pathc == 1);
  TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_dir) == 0);
  globfree (&gl);

  snprintf (buf, sizeof buf, "%s", dangling_link);
  buf[strlen(buf) - 1] = '?';
  TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0);
  TEST_VERIFY_EXIT (gl.gl_pathc == 1);
  TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
  globfree (&gl);

  /* glob should handle dangling symbol as normal file, so <file>? should
     return an empty string.  */
  snprintf (buf, sizeof buf, "%s?", dangling_link);
  TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) != 0);
  globfree (&gl);

  snprintf (buf, sizeof buf, "%s*", dangling_link);
  TEST_VERIFY_EXIT (glob (buf, 0, NULL, &gl) == 0);
  TEST_VERIFY_EXIT (gl.gl_pathc == 1);
  TEST_VERIFY_EXIT (strcmp (gl.gl_pathv[0], dangling_link) == 0);
  globfree (&gl);

  return 0;
}