tests/test-areadlinkat-with-size.c

   1 /* Tests of areadlinkat_with_size.
   2    Copyright (C) 2009-2021 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 <stdbool.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/stat.h>
  30 #include <unistd.h>
  31
  32 #include "ignore-value.h"
  33 #include "macros.h"
  34
  35 #define BASE "test-areadlinkat-with-size.t"
  36
  37 #include "test-areadlink.h"
  38
  39 static int dfd = AT_FDCWD;
  40
  41 /* Wrapper for testing areadlinkat_with_size.  */
  42 static char *
  43 do_areadlinkat_with_size (char const *name, size_t size)
  44 {
  45   return areadlinkat_with_size (dfd, name, size);
  46 }
  47
  48 int
  49 main (void)
  50 {
  51   int result;
  52
  53   /* Remove any leftovers from a previous partial run.  */
  54   ignore_value (system ("rm -rf " BASE "*"));
  55
  56   /* Basic tests.  */
  57   result = test_areadlink (do_areadlinkat_with_size, false);
  58   dfd = open (".", O_RDONLY);
  59   ASSERT (0 <= dfd);
  60   ASSERT (test_areadlink (do_areadlinkat_with_size, false) == result);
  61
  62   /* Relative tests.  */
  63   if (result == 77)
  64     fputs ("skipping test: symlinks not supported on this file system\n",
  65            stderr);
  66   else
  67     {
  68       char *buf;
  69       ASSERT (symlink ("nowhere", BASE "link") == 0);
  70       ASSERT (mkdir (BASE "dir", 0700) == 0);
  71       ASSERT (chdir (BASE "dir") == 0);
  72       buf = areadlinkat_with_size (dfd, BASE "link", strlen (BASE "link"));
  73       ASSERT (buf);
  74       ASSERT (strcmp (buf, "nowhere") == 0);
  75       free (buf);
  76       errno = 0;
  77       ASSERT (areadlinkat_with_size (-1, BASE "link", 1) == NULL);
  78       ASSERT (errno == EBADF);
  79       errno = 0;
  80       ASSERT (areadlinkat_with_size (AT_FDCWD, BASE "link", 1) == NULL);
  81       ASSERT (errno == ENOENT);
  82       ASSERT (chdir ("..") == 0);
  83       ASSERT (rmdir (BASE "dir") == 0);
  84       ASSERT (unlink (BASE "link") == 0);
  85     }
  86
  87   ASSERT (close (dfd) == 0);
  88   return result;
  89 }