stdlib/tst-realpath-toolong.c

   1 /* Verify that realpath returns NULL with ENAMETOOLONG if the result exceeds
   2    NAME_MAX.
   3    Copyright The GNU Toolchain Authors.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <support/check.h>
  26 #include <support/temp_file.h>
  27 #include <support/test-driver.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30
  31 #define BASENAME "tst-realpath-toolong."
  32
  33 int
  34 do_test (void)
  35 {
  36 #ifndef PATH_MAX
  37   return EXIT_UNSUPPORTED;
  38 #else
  39   char *base = support_create_and_chdir_toolong_temp_directory (BASENAME);
  40
  41   char buf[PATH_MAX + 1];
  42   const char *res = realpath (".", buf);
  43
  44   /* canonicalize.c states that if the real path is >= PATH_MAX, then
  45      realpath returns NULL and sets ENAMETOOLONG.  */
  46   TEST_VERIFY (res == NULL);
  47   TEST_VERIFY (errno == ENAMETOOLONG);
  48
  49   free (base);
  50   return 0;
  51 #endif
  52 }
  53
  54 #include <support/test-driver.c>