tests/test-unlinkat.c

   1 /* Tests of unlinkat.
   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 <unistd.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (unlinkat, int, (int, char const *, int));
  25
  26 #include <fcntl.h>
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <sys/stat.h>
  31
  32 #include "unlinkdir.h"
  33 #include "ignore-value.h"
  34 #include "macros.h"
  35
  36 #define BASE "test-unlinkat.t"
  37
  38 #include "test-rmdir.h"
  39 #include "test-unlink.h"
  40
  41 static int dfd = AT_FDCWD;
  42
  43 /* Wrapper around unlinkat to test rmdir behavior.  */
  44 static int
  45 rmdirat (char const *name)
  46 {
  47   return unlinkat (dfd, name, AT_REMOVEDIR);
  48 }
  49
  50 /* Wrapper around unlinkat to test unlink behavior.  */
  51 static int
  52 unlinker (char const *name)
  53 {
  54   return unlinkat (dfd, name, 0);
  55 }
  56
  57 int
  58 main ()
  59 {
  60   /* FIXME: Add tests of fd other than ".".  */
  61   int result1;
  62   int result2;
  63
  64   /* Remove any leftovers from a previous partial run.  */
  65   ignore_value (system ("rm -rf " BASE "*"));
  66
  67   /* Test behaviour for invalid file descriptors.  */
  68   {
  69     errno = 0;
  70     ASSERT (unlinkat (-1, "foo", 0) == -1);
  71     ASSERT (errno == EBADF);
  72   }
  73   {
  74     close (99);
  75     errno = 0;
  76     ASSERT (unlinkat (99, "foo", 0) == -1);
  77     ASSERT (errno == EBADF);
  78   }
  79
  80   result1 = test_rmdir_func (rmdirat, false);
  81   result2 = test_unlink_func (unlinker, false);
  82   ASSERT (result1 == result2);
  83   dfd = open (".", O_RDONLY);
  84   ASSERT (0 <= dfd);
  85   result2 = test_rmdir_func (rmdirat, false);
  86   ASSERT (result1 == result2);
  87   result2 = test_unlink_func (unlinker, false);
  88   ASSERT (result1 == result2);
  89   ASSERT (close (dfd) == 0);
  90   if (result1 == 77)
  91     fputs ("skipping test: symlinks not supported on this file system\n",
  92            stderr);
  93   return (result1 ? result1 : test_exit_status);
  94 }