kc3-lang/gnulib/lib/acl-internal.h

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• Hash : 465b7e91
  Author :
  Date : 2008-06-04T22:48:48
  

  New function for testing triviality of ACL with POSIX-draft like API.
  

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• lib/acl-internal.h

• /* Internal implementation of access control lists.
  
     Copyright (C) 2002-2003, 2005-2008 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
     Written by Paul Eggert and Andreas Gruenbacher.  */
  
  #include "acl.h"
  
  #include <stdbool.h>
  #include <stdlib.h>
  
  /* All systems define the ACL related API in <sys/acl.h>.  */
  #if HAVE_SYS_ACL_H
  # include <sys/acl.h>
  #endif
  #if defined HAVE_ACL && ! defined GETACLCNT && defined ACL_CNT
  # define GETACLCNT ACL_CNT
  #endif
  
  /* On Linux, additional ACL related API is available in <acl/libacl.h>.  */
  #ifdef HAVE_ACL_LIBACL_H
  # include <acl/libacl.h>
  #endif
  
  #include "error.h"
  #include "quote.h"
  
  #include <errno.h>
  #ifndef ENOSYS
  # define ENOSYS (-1)
  #endif
  #ifndef ENOTSUP
  # define ENOTSUP (-1)
  #endif
  
  #include "gettext.h"
  #define _(msgid) gettext (msgid)
  
  #ifndef HAVE_FCHMOD
  # define HAVE_FCHMOD false
  # define fchmod(fd, mode) (-1)
  #endif
  
  
  #if USE_ACL
  
  # if HAVE_ACL_GET_FILE
  /* POSIX 1003.1e (draft 17 -- abandoned) specific version.  */
  /* Linux, FreeBSD, MacOS X, IRIX, Tru64 */
  
  #  ifndef MIN_ACL_ENTRIES
  #   define MIN_ACL_ENTRIES 4
  #  endif
  
  /* POSIX 1003.1e (draft 17) */
  #  ifdef HAVE_ACL_GET_FD
  /* Most platforms have a 1-argument acl_get_fd, only OSF/1 has a 2-argument
     macro(!).  */
  #   if HAVE_ACL_FREE_TEXT /* OSF/1 */
  static inline acl_t
  rpl_acl_get_fd (int fd)
  {
    return acl_get_fd (fd, ACL_TYPE_ACCESS);
  }
  #    undef acl_get_fd
  #    define acl_get_fd rpl_acl_get_fd
  #   endif
  #  else
  #   define HAVE_ACL_GET_FD false
  #   undef acl_get_fd
  #   define acl_get_fd(fd) (NULL)
  #  endif
  
  /* POSIX 1003.1e (draft 17) */
  #  ifdef HAVE_ACL_SET_FD
  /* Most platforms have a 2-argument acl_set_fd, only OSF/1 has a 3-argument
     macro(!).  */
  #   if HAVE_ACL_FREE_TEXT /* OSF/1 */
  static inline int
  rpl_acl_set_fd (int fd, acl_t acl)
  {
    return acl_set_fd (fd, ACL_TYPE_ACCESS, acl);
  }
  #    undef acl_set_fd
  #    define acl_set_fd rpl_acl_set_fd
  #   endif
  #  else
  #   define HAVE_ACL_SET_FD false
  #   undef acl_set_fd
  #   define acl_set_fd(fd, acl) (-1)
  #  endif
  
  /* POSIX 1003.1e (draft 13) */
  #  if ! HAVE_ACL_FREE_TEXT
  #   define acl_free_text(buf) acl_free (buf)
  #  endif
  
  /* Linux-specific */
  #  ifndef HAVE_ACL_EXTENDED_FILE
  #   define HAVE_ACL_EXTENDED_FILE false
  #   define acl_extended_file(name) (-1)
  #  endif
  
  /* Linux-specific */
  #  ifndef HAVE_ACL_FROM_MODE
  #   define HAVE_ACL_FROM_MODE false
  #   define acl_from_mode(mode) (NULL)
  #  endif
  
  /* Set to 1 if a file's mode is implicit by the ACL.
     Set to 0 if a file's mode is stored independently from the ACL.  */
  #  if HAVE_ACL_COPY_EXT_NATIVE && HAVE_ACL_CREATE_ENTRY_NP /* MacOS X */
  #   define MODE_INSIDE_ACL 0
  #  else
  #   define MODE_INSIDE_ACL 1
  #  endif
  
  #  if defined __APPLE__ && defined __MACH__ /* MacOS X */
  #   define ACL_NOT_WELL_SUPPORTED(Err) \
       ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == ENOENT)
  #  elif defined EOPNOTSUPP /* Tru64 NFS */
  #   define ACL_NOT_WELL_SUPPORTED(Err) \
       ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == EOPNOTSUPP)
  #  else
  #   define ACL_NOT_WELL_SUPPORTED(Err) \
       ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY)
  #  endif
  
  /* Define a replacement for acl_entries if needed. (Only Linux has it.)  */
  #  if !HAVE_ACL_ENTRIES
  #   define acl_entries rpl_acl_entries
  extern int acl_entries (acl_t);
  #  endif
  
  /* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS.
     Return 1 if the given ACL is non-trivial.
     Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
     Return -1 and set errno upon failure to determine it.  */
  extern int acl_access_nontrivial (acl_t);
  
  # endif
  
  #endif
  

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