tests/test-faccessat.c

   1 /* Test checking user's permissions for a file.
   2    Copyright (C) 2011-2024 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 #include <config.h>
  18
  19 #include <unistd.h>
  20
  21 #include "signature.h"
  22 SIGNATURE_CHECK (faccessat, int, (int, const char *, int, int));
  23
  24 #include <errno.h>
  25 #include <fcntl.h>
  26
  27 #include "macros.h"
  28
  29 #define BASE "test-faccessat.t"
  30
  31 int
  32 main (void)
  33 {
  34   /* Test behaviour for invalid file descriptors.  */
  35   {
  36     errno = 0;
  37     ASSERT (faccessat (-1, "foo", F_OK, 0) == -1);
  38     ASSERT (errno == EBADF);
  39   }
  40   {
  41     close (99);
  42     errno = 0;
  43     ASSERT (faccessat (99, "foo", F_OK, 0) == -1);
  44     ASSERT (errno == EBADF);
  45   }
  46
  47   /* Test behavior with trailing slash.  */
  48
  49   unlink (BASE "file");
  50   ASSERT (faccessat (AT_FDCWD, ".", X_OK, 0) == 0);
  51   ASSERT (faccessat (AT_FDCWD, "./", X_OK, 0) == 0);
  52   ASSERT (close (open (BASE "file", O_CREAT | O_WRONLY, 0)) == 0);
  53   ASSERT (faccessat (AT_FDCWD, BASE "file", F_OK, 0) == 0);
  54
  55   ASSERT (faccessat (AT_FDCWD, BASE "file/", F_OK, 0) != 0);
  56   ASSERT (errno == ENOTDIR);
  57   ASSERT (faccessat (AT_FDCWD, BASE "file/", R_OK, 0) != 0);
  58   ASSERT (errno == ENOTDIR);
  59   ASSERT (faccessat (AT_FDCWD, BASE "file/", W_OK, 0) != 0);
  60   ASSERT (errno == ENOTDIR);
  61   ASSERT (faccessat (AT_FDCWD, BASE "file/", X_OK, 0) != 0);
  62   ASSERT (errno == ENOTDIR);
  63
  64   unlink (BASE "link1");
  65   if (symlink (".", BASE "link1") == 0)
  66     {
  67       ASSERT (faccessat (AT_FDCWD, BASE "link1", X_OK, 0) == 0);
  68       ASSERT (faccessat (AT_FDCWD, BASE "link1/", X_OK, 0) == 0);
  69
  70       unlink (BASE "link2");
  71       ASSERT (symlink (BASE "file", BASE "link2") == 0);
  72       ASSERT (faccessat (AT_FDCWD, BASE "link2", F_OK, 0) == 0);
  73       ASSERT (faccessat (AT_FDCWD, BASE "link2/", F_OK, 0) != 0);
  74       ASSERT (errno == ENOTDIR);
  75       ASSERT (faccessat (AT_FDCWD, BASE "link2/", R_OK, 0) != 0);
  76       ASSERT (errno == ENOTDIR || errno == EACCES);
  77       ASSERT (faccessat (AT_FDCWD, BASE "link2/", W_OK, 0) != 0);
  78       ASSERT (errno == ENOTDIR || errno == EACCES);
  79       ASSERT (faccessat (AT_FDCWD, BASE "link2/", X_OK, 0) != 0);
  80       ASSERT (errno == ENOTDIR || errno == EACCES);
  81       unlink (BASE "link2");
  82
  83       unlink (BASE "link3");
  84       ASSERT (symlink (BASE "no-such-file", BASE "link3") == 0);
  85       ASSERT (faccessat (AT_FDCWD, BASE "link3", F_OK, 0) != 0);
  86       ASSERT (errno == ENOENT);
  87       ASSERT (faccessat (AT_FDCWD, BASE "link3/", F_OK, 0) != 0);
  88       ASSERT (errno == ENOENT);
  89       ASSERT (faccessat (AT_FDCWD, BASE "link3/", R_OK, 0) != 0);
  90       ASSERT (errno == ENOENT);
  91       ASSERT (faccessat (AT_FDCWD, BASE "link3/", W_OK, 0) != 0);
  92       ASSERT (errno == ENOENT);
  93       ASSERT (faccessat (AT_FDCWD, BASE "link3/", X_OK, 0) != 0);
  94       ASSERT (errno == ENOENT);
  95       unlink (BASE "link3");
  96     }
  97   unlink (BASE "link1");
  98   unlink (BASE "file");
  99
 100   return test_exit_status;
 101 }