1  /* Test for presence of ACL.
       2     Copyright (C) 2008-2023 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  /* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
      18  
      19  #include <config.h>
      20  
      21  #include "acl.h"
      22  
      23  #include <signal.h>
      24  #include <stdio.h>
      25  #include <stdlib.h>
      26  #include <unistd.h>
      27  #include <sys/types.h>
      28  #include <sys/stat.h>
      29  
      30  #include "macros.h"
      31  
      32  int
      33  main (int argc, char *argv[])
      34  {
      35    const char *file;
      36    struct stat statbuf;
      37  
      38    ASSERT (argc == 2);
      39  
      40    file = argv[1];
      41  
      42    if (stat (file, &statbuf) < 0)
      43      {
      44        fprintf (stderr, "could not access file \"%s\"\n", file);
      45        exit (EXIT_FAILURE);
      46      }
      47  
      48    /* Check against possible infinite loop in file_has_acl.  */
      49  #if HAVE_DECL_ALARM
      50    /* Declare failure if test takes too long, by using default abort
      51       caused by SIGALRM.  */
      52    {
      53      int alarm_value = 5;
      54      signal (SIGALRM, SIG_DFL);
      55      alarm (alarm_value);
      56    }
      57  #endif
      58  
      59  #if USE_ACL
      60    {
      61      int ret = file_has_acl (file, &statbuf);
      62      if (ret < 0)
      63        {
      64          fprintf (stderr, "could not access the ACL of file \"%s\"\n", file);
      65          exit (EXIT_FAILURE);
      66        }
      67      printf ("%s\n", ret ? "yes" : "no");
      68    }
      69  #else
      70    printf ("no\n");
      71  #endif
      72  
      73    return 0;
      74  }