tests/test-symlinkat.c

   1 /* Tests of symlinkat.
   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 <unistd.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (symlinkat, int, (char const *, int, char const *));
  25
  26 #include <fcntl.h>
  27 #include <errno.h>
  28 #include <stdbool.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/stat.h>
  33
  34 #include "ignore-value.h"
  35 #include "macros.h"
  36
  37 #ifndef HAVE_SYMLINK
  38 # define HAVE_SYMLINK 0
  39 #endif
  40
  41 #define BASE "test-symlinkat.t"
  42
  43 #include "test-symlink.h"
  44
  45 static int dfd = AT_FDCWD;
  46
  47 static int
  48 do_symlink (char const *contents, char const *name)
  49 {
  50   return symlinkat (contents, dfd, name);
  51 }
  52
  53 int
  54 main (void)
  55 {
  56   int result;
  57
  58   /* Remove any leftovers from a previous partial run.  */
  59   ignore_value (system ("rm -rf " BASE "*"));
  60
  61   /* Test behaviour for invalid file descriptors.  */
  62   {
  63     errno = 0;
  64     ASSERT (symlinkat ("foo", -1, "bar") == -1);
  65     ASSERT (errno == EBADF
  66             || errno == ENOSYS /* seen on mingw */
  67            );
  68   }
  69   {
  70     close (99);
  71     errno = 0;
  72     ASSERT (symlinkat ("foo", 99, "bar") == -1);
  73     ASSERT (errno == EBADF
  74             || errno == ENOSYS /* seen on mingw */
  75            );
  76   }
  77
  78   /* Perform same checks as counterpart functions.  */
  79   result = test_symlink (do_symlink, false);
  80   dfd = openat (AT_FDCWD, ".", O_RDONLY);
  81   ASSERT (0 <= dfd);
  82   ASSERT (test_symlink (do_symlink, false) == result);
  83
  84   ASSERT (close (dfd) == 0);
  85   if (result == 77)
  86     fputs ("skipping test: symlinks not supported on this file system\n",
  87            stderr);
  88   return result;
  89 }