tests/test-lstat.h

   1 /* Test of lstat() function.
   2    Copyright (C) 2008-2019 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 Simon Josefsson, 2008; and Eric Blake, 2009.  */
  18
  19 /* This file is designed to test both lstat(n,buf) and
  20    fstatat(AT_FDCWD,n,buf,AT_SYMLINK_NOFOLLOW).  FUNC is the function
  21    to test.  Assumes that BASE and ASSERT are already defined, and
  22    that appropriate headers are already included.  If PRINT, warn
  23    before skipping symlink tests with status 77.  */
  24
  25 static int
  26 test_lstat_func (int (*func) (char const *, struct stat *), bool print)
  27 {
  28   struct stat st1;
  29   struct stat st2;
  30
  31   /* Test for common directories.  */
  32   ASSERT (func (".", &st1) == 0);
  33   ASSERT (func ("./", &st2) == 0);
  34   ASSERT (SAME_INODE (st1, st2));
  35   ASSERT (S_ISDIR (st1.st_mode));
  36   ASSERT (S_ISDIR (st2.st_mode));
  37   ASSERT (func ("/", &st1) == 0);
  38   ASSERT (func ("///", &st2) == 0);
  39   ASSERT (SAME_INODE (st1, st2));
  40   ASSERT (S_ISDIR (st1.st_mode));
  41   ASSERT (S_ISDIR (st2.st_mode));
  42   ASSERT (func ("..", &st1) == 0);
  43   ASSERT (S_ISDIR (st1.st_mode));
  44
  45   /* Test for error conditions.  */
  46   errno = 0;
  47   ASSERT (func ("", &st1) == -1);
  48   ASSERT (errno == ENOENT);
  49   errno = 0;
  50   ASSERT (func ("nosuch", &st1) == -1);
  51   ASSERT (errno == ENOENT);
  52   errno = 0;
  53   ASSERT (func ("nosuch/", &st1) == -1);
  54   ASSERT (errno == ENOENT);
  55
  56   ASSERT (close (creat (BASE "file", 0600)) == 0);
  57   ASSERT (func (BASE "file", &st1) == 0);
  58   ASSERT (S_ISREG (st1.st_mode));
  59   errno = 0;
  60   ASSERT (func (BASE "file/", &st1) == -1);
  61   ASSERT (errno == ENOTDIR);
  62
  63   /* Now for some symlink tests, where supported.  We set up:
  64      link1 -> directory
  65      link2 -> file
  66      link3 -> dangling
  67      link4 -> loop
  68      then test behavior both with and without trailing slash.
  69   */
  70   if (symlink (".", BASE "link1") != 0)
  71     {
  72       ASSERT (unlink (BASE "file") == 0);
  73       if (print)
  74         fputs ("skipping test: symlinks not supported on this file system\n",
  75                stderr);
  76       return 77;
  77     }
  78   ASSERT (symlink (BASE "file", BASE "link2") == 0);
  79   ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);
  80   ASSERT (symlink (BASE "link4", BASE "link4") == 0);
  81
  82   ASSERT (func (BASE "link1", &st1) == 0);
  83   ASSERT (S_ISLNK (st1.st_mode));
  84   ASSERT (func (BASE "link1/", &st1) == 0);
  85   ASSERT (stat (BASE "link1", &st2) == 0);
  86   ASSERT (S_ISDIR (st1.st_mode));
  87   ASSERT (S_ISDIR (st2.st_mode));
  88   ASSERT (SAME_INODE (st1, st2));
  89
  90   ASSERT (func (BASE "link2", &st1) == 0);
  91   ASSERT (S_ISLNK (st1.st_mode));
  92   errno = 0;
  93   ASSERT (func (BASE "link2/", &st1) == -1);
  94   ASSERT (errno == ENOTDIR);
  95
  96   ASSERT (func (BASE "link3", &st1) == 0);
  97   ASSERT (S_ISLNK (st1.st_mode));
  98   errno = 0;
  99   ASSERT (func (BASE "link3/", &st1) == -1);
 100   ASSERT (errno == ENOENT);
 101
 102   ASSERT (func (BASE "link4", &st1) == 0);
 103   ASSERT (S_ISLNK (st1.st_mode));
 104   errno = 0;
 105   ASSERT (func (BASE "link4/", &st1) == -1);
 106   ASSERT (errno == ELOOP);
 107
 108   /* Cleanup.  */
 109   ASSERT (unlink (BASE "file") == 0);
 110   ASSERT (unlink (BASE "link1") == 0);
 111   ASSERT (unlink (BASE "link2") == 0);
 112   ASSERT (unlink (BASE "link3") == 0);
 113   ASSERT (unlink (BASE "link4") == 0);
 114
 115   return 0;
 116 }