stdlib/test-canon.c

   1 /* Test program for returning the canonical absolute name of a given file.
   2    Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by David Mosberger <davidm@azstarnet.com>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 /* This file must be run from within a directory called "stdlib".  */
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29 #include <sys/param.h>
  30
  31 static char     cwd[PATH_MAX];
  32 static size_t   cwd_len;
  33
  34 struct {
  35   const char *  name;
  36   const char *  value;
  37 } symlinks[] = {
  38   {"SYMLINK_LOOP",      "SYMLINK_LOOP"},
  39   {"SYMLINK_1",         "."},
  40   {"SYMLINK_2",         "//////./../../etc"},
  41   {"SYMLINK_3",         "SYMLINK_1"},
  42   {"SYMLINK_4",         "SYMLINK_2"},
  43   {"SYMLINK_5",         "doesNotExist"},
  44 };
  45
  46 struct {
  47   const char * in, * out, * resolved;
  48   int error;
  49 } tests[] = {
  50   /*  0 */
  51   {"/",                                 "/"},
  52   {"/////////////////////////////////", "/"},
  53   {"/.././.././.././..///",             "/"},
  54   {"/etc",                              "/etc"},
  55   {"/etc/../etc",                       "/etc"},
  56   /*  5 */
  57   {"/doesNotExist/../etc",              0, "/doesNotExist", ENOENT},
  58   {"./././././././././.",               "."},
  59   {"/etc/.//doesNotExist",              0, "/etc/doesNotExist", ENOENT},
  60   {"./doesExist",                       "./doesExist"},
  61   {"./doesExist/",                      "./doesExist"},
  62   /* 10 */
  63   {"./doesExist/../doesExist",          "./doesExist"},
  64   {"foobar",                            0, "./foobar", ENOENT},
  65   {".",                                 "."},
  66   {"./foobar",                          0, "./foobar", ENOENT},
  67   {"SYMLINK_LOOP",                      0, "./SYMLINK_LOOP", ELOOP},
  68   /* 15 */
  69   {"./SYMLINK_LOOP",                    0, "./SYMLINK_LOOP", ELOOP},
  70   {"SYMLINK_1",                         "."},
  71   {"SYMLINK_1/foobar",                  0, "./foobar", ENOENT},
  72   {"SYMLINK_2",                         "/etc"},
  73   {"SYMLINK_3",                         "."},
  74   /* 20 */
  75   {"SYMLINK_4",                         "/etc"},
  76   {"../stdlib/SYMLINK_1",               "."},
  77   {"../stdlib/SYMLINK_2",               "/etc"},
  78   {"../stdlib/SYMLINK_3",               "."},
  79   {"../stdlib/SYMLINK_4",               "/etc"},
  80   /* 25 */
  81   {"./SYMLINK_5",                       0, "./doesNotExist", ENOENT},
  82   {"SYMLINK_5",                         0, "./doesNotExist", ENOENT},
  83   {"SYMLINK_5/foobar",                  0, "./doesNotExist", ENOENT},
  84   {"doesExist/../../stdlib/doesExist",  "./doesExist"},
  85   {"doesExist/.././../stdlib/.",        "."}
  86 };
  87
  88
  89 int
  90 check_path (const char * result, const char * expected)
  91 {
  92   int good;
  93
  94   if (!result)
  95     return (expected == NULL);
  96
  97   if (!expected)
  98     return 0;
  99
 100   if (expected[0] == '.' && (expected[1] == '/' || expected[1] == '\0'))
 101     good = (strncmp (result, cwd, cwd_len) == 0
 102             && strcmp (result + cwd_len, expected + 1) == 0);
 103   else
 104     good = (strcmp (expected, result) == 0);
 105
 106   return good;
 107 }
 108
 109
 110 int
 111 main (int argc, char ** argv)
 112 {
 113   char * result;
 114   int fd, i, errors = 0;
 115   char buf[PATH_MAX];
 116
 117   getcwd (cwd, sizeof(buf));
 118   cwd_len = strlen (cwd);
 119
 120   for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
 121     symlink (symlinks[i].value, symlinks[i].name);
 122
 123   fd = open("doesExist", O_CREAT | O_EXCL, 0777);
 124
 125   for (i = 0; i < (int) (sizeof (tests) / sizeof (tests[0])); ++i)
 126     {
 127       buf[0] = '\0';
 128       result = realpath (tests[i].in, buf);
 129
 130       if (!check_path (result, tests[i].out))
 131         {
 132           printf ("%s: flunked test %d (expected `%s', got `%s')\n",
 133                   argv[0], i, tests[i].out ? tests[i].out : "NULL",
 134                   result ? result : "NULL");
 135           ++errors;
 136           continue;
 137         }
 138
 139       if (!check_path (buf, tests[i].out ? tests[i].out : tests[i].resolved))
 140         {
 141           printf ("%s: flunked test %d (expected resolved `%s', got `%s')\n",
 142                   argv[0], i, tests[i].out ? tests[i].out : tests[i].resolved,
 143                   buf);
 144           ++errors;
 145           continue;
 146         }
 147
 148       if (!tests[i].out && errno != tests[i].error)
 149         {
 150           printf ("%s: flunked test %d (expected errno %d, got %d)\n",
 151                   argv[0], i, tests[i].error, errno);
 152           ++errors;
 153           continue;
 154         }
 155     }
 156
 157   getcwd (buf, sizeof(buf));
 158   if (strcmp (buf, cwd))
 159     {
 160       printf ("%s: current working directory changed from %s to %s\n",
 161               argv[0], cwd, buf);
 162       ++errors;
 163     }
 164
 165   if (fd >= 0)
 166     unlink("doesExist");
 167
 168   for (i = 0; i < (int) (sizeof (symlinks) / sizeof (symlinks[0])); ++i)
 169     unlink (symlinks[i].name);
 170
 171   if (errors != 0)
 172     {
 173       printf ("%d errors.\n", errors);
 174       exit (EXIT_FAILURE);
 175     }
 176
 177   puts ("No errors.");
 178   return EXIT_SUCCESS;
 179 }