stdlib/test-canon.c

   1 /* Test program for returning the canonical absolute name of a given file.
   2    Copyright (C) 1996,1997,2000,2002,2004,2005,2006
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by David Mosberger <davidm@azstarnet.com>.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 /* This file must be run from within a directory called "stdlib".  */
  23
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30 #include <sys/param.h>
  31
  32 /* Prototype for our test function.  */
  33 extern int do_test (int argc, char *argv[]);
  34 #include <test-skeleton.c>
  35
  36 #ifndef PATH_MAX
  37 # define PATH_MAX 4096
  38 #endif
  39 static char     cwd[PATH_MAX];
  40 static size_t   cwd_len;
  41
  42 struct {
  43   const char *  name;
  44   const char *  value;
  45 } symlinks[] = {
  46   {"SYMLINK_LOOP",      "SYMLINK_LOOP"},
  47   {"SYMLINK_1",         "."},
  48   {"SYMLINK_2",         "//////./../../etc"},
  49   {"SYMLINK_3",         "SYMLINK_1"},
  50   {"SYMLINK_4",         "SYMLINK_2"},
  51   {"SYMLINK_5",         "doesNotExist"},
  52 };
  53
  54 struct {
  55   const char * in, * out, * resolved;
  56   int error;
  57 } tests[] = {
  58   /*  0 */
  59   {"/",                                 "/"},
  60   {"/////////////////////////////////", "/"},
  61   {"/.././.././.././..///",             "/"},
  62   {"/etc",                              "/etc"},
  63   {"/etc/../etc",                       "/etc"},
  64   /*  5 */
  65   {"/doesNotExist/../etc",              0, "/doesNotExist", ENOENT},
  66   {"./././././././././.",               "."},
  67   {"/etc/.//doesNotExist",              0, "/etc/doesNotExist", ENOENT},
  68   {"./doesExist",                       "./doesExist"},
  69   {"./doesExist/",                      "./doesExist"},
  70   /* 10 */
  71   {"./doesExist/../doesExist",          "./doesExist"},
  72   {"foobar",                            0, "./foobar", ENOENT},
  73   {".",                                 "."},
  74   {"./foobar",                          0, "./foobar", ENOENT},
  75   {"SYMLINK_LOOP",                      0, "./SYMLINK_LOOP", ELOOP},
  76   /* 15 */
  77   {"./SYMLINK_LOOP",                    0, "./SYMLINK_LOOP", ELOOP},
  78   {"SYMLINK_1",                         "."},
  79   {"SYMLINK_1/foobar",                  0, "./foobar", ENOENT},
  80   {"SYMLINK_2",                         "/etc"},
  81   {"SYMLINK_3",                         "."},
  82   /* 20 */
  83   {"SYMLINK_4",                         "/etc"},
  84   {"../stdlib/SYMLINK_1",               "."},
  85   {"../stdlib/SYMLINK_2",               "/etc"},
  86   {"../stdlib/SYMLINK_3",               "."},
  87   {"../stdlib/SYMLINK_4",               "/etc"},
  88   /* 25 */
  89   {"./SYMLINK_5",                       0, "./doesNotExist", ENOENT},
  90   {"SYMLINK_5",                         0, "./doesNotExist", ENOENT},
  91   {"SYMLINK_5/foobar",                  0, "./doesNotExist", ENOENT},
  92   {"doesExist/../../stdlib/doesExist",  "./doesExist"},
  93   {"doesExist/.././../stdlib/.",        "."},
  94   /* 30 */
  95   {"./doesExist/someFile/",             0, "./doesExist/someFile", ENOTDIR},
  96   {"./doesExist/someFile/..",           0, "./doesExist/someFile", ENOTDIR},
  97 };
  98
  99
 100 static int
 101 check_path (const char * result, const char * expected)
 102 {
 103   int good;
 104
 105   if (!result)
 106     return (expected == NULL);
 107
 108   if (!expected)
 109     return 0;
 110
 111   if (expected[0] == '.' && (expected[1] == '/' || expected[1] == '\0'))
 112     good = (strncmp (result, cwd, cwd_len) == 0
 113             && strcmp (result + cwd_len, expected + 1) == 0);
 114   else
 115     good = (strcmp (expected, result) == 0);
 116
 117   return good;
 118 }
 119
 120
 121 int
 122 do_test (int argc, char ** argv)
 123 {
 124   char * result;
 125   int i, errors = 0;
 126   char buf[PATH_MAX];
 127
 128   getcwd (cwd, sizeof(buf));
 129   cwd_len = strlen (cwd);
 130
 131   errno = 0;
 132   if (realpath (NULL, buf) != NULL || errno != EINVAL)
 133     {
 134       printf ("%s: expected return value NULL and errno set to EINVAL"
 135               " for realpath(NULL,...)\n", argv[0]);
 136       ++errors;
 137     }
 138
 139 #if 0
 140   /* This is now allowed.  The test is invalid.  */
 141   errno = 0;
 142   if (realpath ("/", NULL) != NULL || errno != EINVAL)
 143     {
 144       printf ("%s: expected return value NULL and errno set to EINVAL"
 145               " for realpath(...,NULL)\n", argv[0]);
 146       ++errors;
 147     }
 148 #endif
 149
 150   errno = 0;
 151   if (realpath ("", buf) != NULL || errno != ENOENT)
 152     {
 153       printf ("%s: expected return value NULL and set errno to ENOENT"
 154               " for realpath(\"\",...)\n", argv[0]);
 155       ++errors;
 156     }
 157
 158   for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
 159     symlink (symlinks[i].value, symlinks[i].name);
 160
 161   int has_dir = mkdir ("doesExist", 0777) == 0;
 162
 163   int fd = has_dir ? creat ("doesExist/someFile", 0777) : -1;
 164
 165   for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i)
 166     {
 167       buf[0] = '\0';
 168       result = realpath (tests[i].in, buf);
 169
 170       if (!check_path (result, tests[i].out))
 171         {
 172           printf ("%s: flunked test %d (expected `%s', got `%s')\n",
 173                   argv[0], i, tests[i].out ? tests[i].out : "NULL",
 174                   result ? result : "NULL");
 175           ++errors;
 176           continue;
 177         }
 178
 179       if (!check_path (buf, tests[i].out ? tests[i].out : tests[i].resolved))
 180         {
 181           printf ("%s: flunked test %d (expected resolved `%s', got `%s')\n",
 182                   argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved,
 183                   buf);
 184           ++errors;
 185           continue;
 186         }
 187
 188       if (!tests[i].out && errno != tests[i].error)
 189         {
 190           printf ("%s: flunked test %d (expected errno %d, got %d)\n",
 191                   argv[0], i, tests[i].error, errno);
 192           ++errors;
 193           continue;
 194         }
 195
 196       char *result2 = realpath (tests[i].in, NULL);
 197       if ((result2 == NULL && result != NULL)
 198           || (result2 != NULL && strcmp (result, result2) != 0))
 199         {
 200           printf ("\
 201 %s: realpath(..., NULL) produced different result than realpath(..., buf): '%s' vs '%s'\n",
 202                   argv[0], result2, result);
 203           ++errors;
 204         }
 205       free (result2);
 206     }
 207
 208   getcwd (buf, sizeof(buf));
 209   if (strcmp (buf, cwd))
 210     {
 211       printf ("%s: current working directory changed from %s to %s\n",
 212               argv[0], cwd, buf);
 213       ++errors;
 214     }
 215
 216   if (fd >= 0)
 217     {
 218       close (fd);
 219       unlink ("doesExist/someFile");
 220     }
 221
 222   if (has_dir)
 223     rmdir ("doesExist");
 224
 225   for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
 226     unlink (symlinks[i].name);
 227
 228   if (errors != 0)
 229     {
 230       printf ("%d errors.\n", errors);
 231       return EXIT_FAILURE;
 232     }
 233
 234   puts ("No errors.");
 235   return EXIT_SUCCESS;
 236 }