1  /* Test checking user's permissions for a file.
       2     Copyright (C) 2011-2023 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    unlink (BASE "file");
      49    ASSERT (faccessat (AT_FDCWD, ".", X_OK, 0) == 0);
      50    ASSERT (faccessat (AT_FDCWD, "./", X_OK, 0) == 0);
      51    ASSERT (close (open (BASE "file", O_CREAT | O_WRONLY, 0)) == 0);
      52    ASSERT (faccessat (AT_FDCWD, BASE "file", F_OK, 0) == 0);
      53    ASSERT (faccessat (AT_FDCWD, BASE "file/", F_OK, 0) != 0);
      54    unlink (BASE "link1");
      55    if (symlink (".", BASE "link1") == 0)
      56      {
      57        ASSERT (faccessat (AT_FDCWD, BASE "link1", X_OK, 0) == 0);
      58        ASSERT (faccessat (AT_FDCWD, BASE "link1/", X_OK, 0) == 0);
      59  
      60        unlink (BASE "link2");
      61        ASSERT (symlink (BASE "file", BASE "link2") == 0);
      62        ASSERT (faccessat (AT_FDCWD, BASE "link2", F_OK, 0) == 0);
      63        ASSERT (faccessat (AT_FDCWD, BASE "link2/", F_OK, 0) != 0);
      64        unlink (BASE "link2");
      65  
      66        unlink (BASE "link3");
      67        ASSERT (symlink (BASE "no-such-file", BASE "link3") == 0);
      68        ASSERT (faccessat (AT_FDCWD, BASE "link3", F_OK, 0) != 0);
      69        ASSERT (faccessat (AT_FDCWD, BASE "link3/", F_OK, 0) != 0);
      70        unlink (BASE "link3");
      71      }
      72    unlink (BASE "link1");
      73    unlink (BASE "file");
      74  
      75    return 0;
      76  }