tests/test-unlinkat.c

   1 /* Tests of unlinkat.
   2    Copyright (C) 2009-2020 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 <stdbool.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <sys/stat.h>
  32
  33 #include "unlinkdir.h"
  34 #include "ignore-value.h"
  35 #include "macros.h"
  36
  37 #define BASE "test-unlinkat.t"
  38
  39 #include "test-rmdir.h"
  40 #include "test-unlink.h"
  41
  42 static int dfd = AT_FDCWD;
  43
  44 /* Wrapper around unlinkat to test rmdir behavior.  */
  45 static int
  46 rmdirat (char const *name)
  47 {
  48   return unlinkat (dfd, name, AT_REMOVEDIR);
  49 }
  50
  51 /* Wrapper around unlinkat to test unlink behavior.  */
  52 static int
  53 unlinker (char const *name)
  54 {
  55   return unlinkat (dfd, name, 0);
  56 }
  57
  58 int
  59 main (int argc _GL_UNUSED, char *argv[])
  60 {
  61   /* FIXME: Add tests of fd other than ".".  */
  62   int result1;
  63   int result2;
  64
  65   /* Remove any leftovers from a previous partial run.  */
  66   ignore_value (system ("rm -rf " BASE "*"));
  67
  68   /* Test behaviour for invalid file descriptors.  */
  69   {
  70     errno = 0;
  71     ASSERT (unlinkat (-1, "foo", 0) == -1);
  72     ASSERT (errno == EBADF);
  73   }
  74   {
  75     close (99);
  76     errno = 0;
  77     ASSERT (unlinkat (99, "foo", 0) == -1);
  78     ASSERT (errno == EBADF);
  79   }
  80
  81   result1 = test_rmdir_func (rmdirat, false);
  82   result2 = test_unlink_func (unlinker, false);
  83   ASSERT (result1 == result2);
  84   dfd = open (".", O_RDONLY);
  85   ASSERT (0 <= dfd);
  86   result2 = test_rmdir_func (rmdirat, false);
  87   ASSERT (result1 == result2);
  88   result2 = test_unlink_func (unlinker, false);
  89   ASSERT (result1 == result2);
  90   ASSERT (close (dfd) == 0);
  91   if (result1 == 77)
  92     fputs ("skipping test: symlinks not supported on this file system\n",
  93            stderr);
  94   return result1;
  95 }