tests/test-access.c

   1 /* Tests of access.
   2    Copyright (C) 2019-2020 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 #include <config.h>
  18
  19 #include <unistd.h>
  20
  21 #include "signature.h"
  22 SIGNATURE_CHECK (access, int, (const char *, int));
  23
  24 #include <errno.h>
  25 #include <fcntl.h>
  26 #include <sys/stat.h>
  27 #include "root-uid.h"
  28 #include "macros.h"
  29
  30 /* mingw and MSVC 9 lack geteuid, so setup a dummy value.  */
  31 #if !HAVE_GETEUID
  32 # define geteuid() ROOT_UID
  33 #endif
  34
  35 #define BASE "test-access.t"
  36
  37 int
  38 main ()
  39 {
  40   /* Remove anything from prior partial run.  */
  41   unlink (BASE "f");
  42   unlink (BASE "f1");
  43   unlink (BASE "f2");
  44
  45   {
  46     errno = 0;
  47     ASSERT (access (BASE "f", R_OK) == -1);
  48     ASSERT (errno == ENOENT);
  49
  50     errno = 0;
  51     ASSERT (access (BASE "f", W_OK) == -1);
  52     ASSERT (errno == ENOENT);
  53
  54     errno = 0;
  55     ASSERT (access (BASE "f", X_OK) == -1);
  56     ASSERT (errno == ENOENT);
  57   }
  58   {
  59     ASSERT (close (creat (BASE "f1", 0700)) == 0);
  60
  61     ASSERT (access (BASE "f1", R_OK) == 0);
  62     ASSERT (access (BASE "f1", W_OK) == 0);
  63     ASSERT (access (BASE "f1", X_OK) == 0);
  64   }
  65   {
  66     ASSERT (close (creat (BASE "f2", 0600)) == 0);
  67     ASSERT (chmod (BASE "f2", 0400) == 0);
  68
  69     ASSERT (access (BASE "f2", R_OK) == 0);
  70
  71     if (geteuid () != ROOT_UID)
  72       {
  73         errno = 0;
  74         ASSERT (access (BASE "f2", W_OK) == -1);
  75         ASSERT (errno == EACCES);
  76       }
  77
  78 #if defined _WIN32 && !defined __CYGWIN__
  79     /* X_OK works like R_OK.  */
  80     ASSERT (access (BASE "f2", X_OK) == 0);
  81 #else
  82     errno = 0;
  83     ASSERT (access (BASE "f2", X_OK) == -1);
  84     ASSERT (errno == EACCES);
  85 #endif
  86   }
  87
  88   /* Cleanup.  */
  89   unlink (BASE "f1");
  90   unlink (BASE "f2");
  91
  92   return 0;
  93 }