tests/test-fstatat.c

   1 /* Tests of fstatat.
   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 <sys/stat.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (fstatat, int, (int, char const *, struct stat *, int));
  25
  26 #include <fcntl.h>
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31
  32 #include "openat.h"
  33 #include "same-inode.h"
  34 #include "ignore-value.h"
  35 #include "macros.h"
  36
  37 #ifndef BASE
  38 # define BASE "test-fstatat.t"
  39 #endif
  40
  41 #include "test-lstat.h"
  42 #include "test-stat.h"
  43
  44 static int dfd = AT_FDCWD;
  45
  46 /* Wrapper around fstatat to test stat behavior.  */
  47 static int
  48 do_stat (char const *name, struct stat *st)
  49 {
  50 #ifdef TEST_STATAT
  51   return statat (dfd, name, st);
  52 #else
  53   return fstatat (dfd, name, st, 0);
  54 #endif
  55 }
  56
  57 /* Wrapper around fstatat to test lstat behavior.  */
  58 static int
  59 do_lstat (char const *name, struct stat *st)
  60 {
  61 #ifdef TEST_STATAT
  62   return lstatat (dfd, name, st);
  63 #else
  64   return fstatat (dfd, name, st, AT_SYMLINK_NOFOLLOW);
  65 #endif
  66 }
  67
  68 int
  69 main (_GL_UNUSED int argc, _GL_UNUSED char *argv[])
  70 {
  71   int result;
  72
  73   /* Remove any leftovers from a previous partial run.  */
  74   ignore_value (system ("rm -rf " BASE "*"));
  75
  76   /* Test behaviour for invalid file descriptors.  */
  77   {
  78     struct stat statbuf;
  79
  80     errno = 0;
  81     ASSERT (fstatat (-1, "foo", &statbuf, 0) == -1);
  82     ASSERT (errno == EBADF);
  83   }
  84   {
  85     struct stat statbuf;
  86
  87     close (99);
  88     errno = 0;
  89     ASSERT (fstatat (99, "foo", &statbuf, 0) == -1);
  90     ASSERT (errno == EBADF);
  91   }
  92
  93   result = test_stat_func (do_stat, false);
  94   ASSERT (test_lstat_func (do_lstat, false) == result);
  95   dfd = open (".", O_RDONLY);
  96   ASSERT (0 <= dfd);
  97   ASSERT (test_stat_func (do_stat, false) == result);
  98   ASSERT (test_lstat_func (do_lstat, false) == result);
  99   ASSERT (close (dfd) == 0);
 100
 101   /* FIXME - add additional tests of dfd not at current directory.  */
 102
 103   if (result == 77)
 104     fputs ("skipping test: symlinks not supported on this file system\n",
 105            stderr);
 106   return (result ? result : test_exit_status);
 107 }