1  /* Copy access control list from one file to another.  -*- coding: utf-8 -*-
       2  
       3     Copyright (C) 2002-2003, 2005-2022 Free Software Foundation, Inc.
       4  
       5     This program is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU General Public License as published by
       7     the Free Software Foundation, either version 3 of the License, or
       8     (at your option) any later version.
       9  
      10     This program is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU General Public License for more details.
      14  
      15     You should have received a copy of the GNU General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.
      17  
      18     Written by Paul Eggert, Andreas Grünbacher, and Bruno Haible.  */
      19  
      20  #include <config.h>
      21  
      22  #include "acl.h"
      23  
      24  #include "acl-internal.h"
      25  
      26  
      27  /* Copy access control lists from one file to another. If SOURCE_DESC is
      28     a valid file descriptor, use file descriptor operations, else use
      29     filename based operations on SRC_NAME. Likewise for DEST_DESC and
      30     DST_NAME.
      31     If access control lists are not available, fchmod the target file to
      32     MODE.  Also sets the non-permission bits of the destination file
      33     (S_ISUID, S_ISGID, S_ISVTX) to those from MODE if any are set.
      34     Return 0 if successful.
      35     Return -2 and set errno for an error relating to the source file.
      36     Return -1 and set errno for an error relating to the destination file.  */
      37  
      38  int
      39  qcopy_acl (const char *src_name, int source_desc, const char *dst_name,
      40             int dest_desc, mode_t mode)
      41  {
      42    struct permission_context ctx;
      43    int ret;
      44  
      45    ret = get_permissions (src_name, source_desc, mode, &ctx);
      46    if (ret != 0)
      47      return -2;
      48    ret = set_permissions (&ctx, dst_name, dest_desc);
      49    free_permission_context (&ctx);
      50    return ret;
      51  }