tests/test-areadlinkat.c

   1 /* Tests of areadlinkat.
   2    Copyright (C) 2009-2024 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 Eric Blake <ebb9@byu.net>, 2009.  */
  18
  19 #include <config.h>
  20
  21 #include "areadlink.h"
  22
  23 #include <fcntl.h>
  24 #include <errno.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <sys/stat.h>
  29 #include <unistd.h>
  30
  31 #include "ignore-value.h"
  32 #include "macros.h"
  33
  34 #define BASE "test-areadlinkat.t"
  35
  36 #include "test-areadlink.h"
  37
  38 static int dfd = AT_FDCWD;
  39
  40 /* Wrapper for testing areadlinkat.  */
  41 static char *
  42 do_areadlinkat (char const *name, _GL_UNUSED size_t ignored)
  43 {
  44   return areadlinkat (dfd, name);
  45 }
  46
  47 int
  48 main (void)
  49 {
  50   int result;
  51
  52   /* Remove any leftovers from a previous partial run.  */
  53   ignore_value (system ("rm -rf " BASE "*"));
  54
  55   /* Basic tests.  */
  56   result = test_areadlink (do_areadlinkat, false);
  57   dfd = open (".", O_RDONLY);
  58   ASSERT (0 <= dfd);
  59   ASSERT (test_areadlink (do_areadlinkat, false) == result);
  60
  61   /* Relative tests.  */
  62   if (result == 77)
  63     fputs ("skipping test: symlinks not supported on this file system\n",
  64            stderr);
  65   else
  66     {
  67       char *buf;
  68       ASSERT (symlink ("nowhere", BASE "link") == 0);
  69       ASSERT (mkdir (BASE "dir", 0700) == 0);
  70       ASSERT (chdir (BASE "dir") == 0);
  71       buf = areadlinkat (dfd, BASE "link");
  72       ASSERT (buf);
  73       ASSERT (strcmp (buf, "nowhere") == 0);
  74       free (buf);
  75       errno = 0;
  76       ASSERT (areadlinkat (-1, BASE "link") == NULL);
  77       ASSERT (errno == EBADF);
  78       errno = 0;
  79       ASSERT (areadlinkat (AT_FDCWD, BASE "link") == NULL);
  80       ASSERT (errno == ENOENT);
  81       ASSERT (chdir ("..") == 0);
  82       ASSERT (rmdir (BASE "dir") == 0);
  83       ASSERT (unlink (BASE "link") == 0);
  84     }
  85
  86   ASSERT (close (dfd) == 0);
  87   return (result ? result : test_exit_status);
  88 }