tests/test-remove.c

   1 /* Tests of remove.
   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 <stdio.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (remove, int, (char const *));
  25
  26 #include <fcntl.h>
  27 #include <errno.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32
  33 #include "ignore-value.h"
  34 #include "macros.h"
  35
  36 #define BASE "test-remove.t"
  37
  38 int
  39 main (void)
  40 {
  41   /* Remove any leftovers from a previous partial run.  */
  42   ignore_value (system ("rm -rf " BASE "*"));
  43
  44   /* Setup.  */
  45   ASSERT (mkdir (BASE "dir", 0700) == 0);
  46   ASSERT (close (creat (BASE "dir/file", 0600)) == 0);
  47
  48   /* Basic error conditions.  */
  49   errno = 0;
  50   ASSERT (remove ("") == -1);
  51   ASSERT (errno == ENOENT);
  52   errno = 0;
  53   ASSERT (remove ("nosuch") == -1);
  54   ASSERT (errno == ENOENT);
  55   errno = 0;
  56   ASSERT (remove ("nosuch/") == -1);
  57   ASSERT (errno == ENOENT);
  58   errno = 0;
  59   ASSERT (remove (".") == -1);
  60   ASSERT (errno == EINVAL || errno == EBUSY);
  61   /* Resulting errno after ".." or "/" is too varied to test; it is
  62      reasonable to see any of EINVAL, EEXIST, ENOTEMPTY, EACCES.  */
  63   ASSERT (remove ("..") == -1);
  64   ASSERT (remove ("/") == -1);
  65   ASSERT (remove ("///") == -1);
  66   errno = 0;
  67   ASSERT (remove (BASE "dir/file/") == -1);
  68   ASSERT (errno == ENOTDIR);
  69
  70   /* Non-empty directory.  */
  71   errno = 0;
  72   ASSERT (remove (BASE "dir") == -1);
  73   ASSERT (errno == EEXIST || errno == ENOTEMPTY);
  74
  75   /* Non-directory.  */
  76   ASSERT (remove (BASE "dir/file") == 0);
  77
  78   /* Empty directory.  */
  79   errno = 0;
  80   ASSERT (remove (BASE "dir/.//") == -1);
  81   ASSERT (errno == EINVAL || errno == EBUSY || errno == EEXIST);
  82   ASSERT (remove (BASE "dir") == 0);
  83
  84   /* Test symlink behavior.  Specifying trailing slash should remove
  85      referent directory, or cause ENOTDIR failure, but not touch
  86      symlink.  */
  87   if (symlink (BASE "dir", BASE "link") != 0)
  88     {
  89       if (test_exit_status != EXIT_SUCCESS)
  90         return test_exit_status;
  91       fputs ("skipping test: symlinks not supported on this file system\n",
  92              stderr);
  93       return 77;
  94     }
  95   ASSERT (mkdir (BASE "dir", 0700) == 0);
  96   errno = 0;
  97   if (remove (BASE "link/") == 0)
  98     {
  99       struct stat st;
 100       errno = 0;
 101       ASSERT (stat (BASE "link", &st) == -1);
 102       ASSERT (errno == ENOENT);
 103     }
 104   else
 105     ASSERT (remove (BASE "dir") == 0);
 106   {
 107     struct stat st;
 108     ASSERT (lstat (BASE "link", &st) == 0);
 109     ASSERT (S_ISLNK (st.st_mode));
 110   }
 111   ASSERT (remove (BASE "link") == 0);
 112   /* Trailing slash on symlink to non-directory is an error.  */
 113   ASSERT (symlink (BASE "loop", BASE "loop") == 0);
 114   errno = 0;
 115   ASSERT (remove (BASE "loop/") == -1);
 116   ASSERT (errno == ELOOP || errno == ENOTDIR);
 117   ASSERT (remove (BASE "loop") == 0);
 118   ASSERT (close (creat (BASE "file", 0600)) == 0);
 119   ASSERT (symlink (BASE "file", BASE "link") == 0);
 120   errno = 0;
 121   ASSERT (remove (BASE "link/") == -1);
 122   ASSERT (errno == ENOTDIR);
 123   ASSERT (remove (BASE "link") == 0);
 124   ASSERT (remove (BASE "file") == 0);
 125
 126   return test_exit_status;
 127 }