tests/test-symlinkat.c

   1 /* Tests of symlinkat.
   2    Copyright (C) 2009-2025 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 <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/stat.h>
  32
  33 #include "ignore-value.h"
  34 #include "macros.h"
  35
  36 #ifndef HAVE_SYMLINK
  37 # define HAVE_SYMLINK 0
  38 #endif
  39
  40 #define BASE "test-symlinkat.t"
  41
  42 #include "test-symlink.h"
  43
  44 static int dfd = AT_FDCWD;
  45
  46 static int
  47 do_symlink (char const *contents, char const *name)
  48 {
  49   return symlinkat (contents, dfd, name);
  50 }
  51
  52 int
  53 main (void)
  54 {
  55   int result;
  56
  57   /* Remove any leftovers from a previous partial run.  */
  58   ignore_value (system ("rm -rf " BASE "*"));
  59
  60   /* Test behaviour for invalid file descriptors.  */
  61   {
  62     errno = 0;
  63     ASSERT (symlinkat ("foo", -1, "bar") == -1);
  64     ASSERT (errno == EBADF
  65             || errno == ENOSYS /* seen on mingw */
  66            );
  67   }
  68   {
  69     close (99);
  70     errno = 0;
  71     ASSERT (symlinkat ("foo", 99, "bar") == -1);
  72     ASSERT (errno == EBADF
  73             || errno == ENOSYS /* seen on mingw */
  74            );
  75   }
  76
  77   /* Perform same checks as counterpart functions.  */
  78   result = test_symlink (do_symlink, false);
  79   dfd = openat (AT_FDCWD, ".", O_RDONLY);
  80   ASSERT (0 <= dfd);
  81   ASSERT (test_symlink (do_symlink, false) == result);
  82
  83   ASSERT (close (dfd) == 0);
  84   if (result == 77)
  85     fputs ("skipping test: symlinks not supported on this file system\n",
  86            stderr);
  87   return (result ? result : test_exit_status);
  88 }