+
−/* Internal implementation of access control lists.
+
−
+
−   Copyright (C) 2002-2003, 2005-2013 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, Andreas Grünbacher, and Bruno Haible.  */
+
−
+
−#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_FACL && ! 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
+
−
+
−/* On HP-UX >= 11.11, additional ACL API is available in <aclv.h>.  */
+
−#if HAVE_ACLV_H
+
−# include <sys/types.h>
+
−# include <aclv.h>
+
−/* HP-UX 11.11 lacks these declarations.  */
+
−extern int acl (char *, int, int, struct acl *);
+
−extern int aclsort (int, int, struct acl *);
+
−#endif
+
−
+
−#include <errno.h>
+
−
+
−#include <limits.h>
+
−#ifndef MIN
+
−# define MIN(a,b) ((a) < (b) ? (a) : (b))
+
−#endif
+
−
+
−#ifndef SIZE_MAX
+
−# define SIZE_MAX ((size_t) -1)
+
−#endif
+
−
+
−#ifndef HAVE_FCHMOD
+
−# define HAVE_FCHMOD false
+
−# define fchmod(fd, mode) (-1)
+
−#endif
+
−
+
−_GL_INLINE_HEADER_BEGIN
+
−#ifndef ACL_INTERNAL_INLINE
+
−# define ACL_INTERNAL_INLINE _GL_INLINE
+
−#endif
+
−
+
−#if USE_ACL
+
−
+
−# if HAVE_ACL_GET_FILE
+
−/* POSIX 1003.1e (draft 17 -- abandoned) specific version.  */
+
−/* Linux, FreeBSD, Mac OS 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 */
+
−ACL_INTERNAL_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 */
+
−ACL_INTERNAL_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) || defined __sgi /* Mac OS X, IRIX */
+
−#   define MODE_INSIDE_ACL 0
+
−#  else
+
−#   define MODE_INSIDE_ACL 1
+
−#  endif
+
−
+
−/* Return the number of entries in ACL.
+
−   Return -1 and set errno upon failure to determine it.  */
+
−/* 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
+
−
+
−#  if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */
+
−/* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED.
+
−   Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial.  */
+
−extern int acl_extended_nontrivial (acl_t);
+
−#  else
+
−/* 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
+
−
+
−# elif HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
+
−
+
−/* 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 defined __CYGWIN__ /* Cygwin */
+
−#   define MODE_INSIDE_ACL 0
+
−#  else /* Solaris */
+
−#   define MODE_INSIDE_ACL 1
+
−#  endif
+
−
+
−/* Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int acl_nontrivial (int count, aclent_t *entries);
+
−
+
−#  ifdef ACE_GETACL /* Solaris 10 */
+
−
+
−/* Test an ACL retrieved with ACE_GETACL.
+
−   Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int acl_ace_nontrivial (int count, ace_t *entries);
+
−
+
−/* Definitions for when the built executable is executed on Solaris 10
+
−   (newer version) or Solaris 11.  */
+
−/* For a_type.  */
+
−#   define OLD_ALLOW 0
+
−#   define OLD_DENY  1
+
−#   define NEW_ACE_ACCESS_ALLOWED_ACE_TYPE 0 /* replaces ALLOW */
+
−#   define NEW_ACE_ACCESS_DENIED_ACE_TYPE  1 /* replaces DENY */
+
−/* For a_flags.  */
+
−#   define OLD_ACE_OWNER            0x0100
+
−#   define OLD_ACE_GROUP            0x0200
+
−#   define OLD_ACE_OTHER            0x0400
+
−#   define NEW_ACE_OWNER            0x1000
+
−#   define NEW_ACE_GROUP            0x2000
+
−#   define NEW_ACE_IDENTIFIER_GROUP 0x0040
+
−#   define NEW_ACE_EVERYONE         0x4000
+
−/* For a_access_mask.  */
+
−#   define NEW_ACE_READ_DATA         0x001 /* corresponds to 'r' */
+
−#   define NEW_ACE_WRITE_DATA        0x002 /* corresponds to 'w' */
+
−#   define NEW_ACE_APPEND_DATA       0x004
+
−#   define NEW_ACE_READ_NAMED_ATTRS  0x008
+
−#   define NEW_ACE_WRITE_NAMED_ATTRS 0x010
+
−#   define NEW_ACE_EXECUTE           0x020
+
−#   define NEW_ACE_DELETE_CHILD      0x040
+
−#   define NEW_ACE_READ_ATTRIBUTES   0x080
+
−#   define NEW_ACE_WRITE_ATTRIBUTES  0x100
+
−#   define NEW_ACE_DELETE          0x10000
+
−#   define NEW_ACE_READ_ACL        0x20000
+
−#   define NEW_ACE_WRITE_ACL       0x40000
+
−#   define NEW_ACE_WRITE_OWNER     0x80000
+
−#   define NEW_ACE_SYNCHRONIZE    0x100000
+
−
+
−#  endif
+
−
+
−# elif HAVE_GETACL /* HP-UX */
+
−
+
−/* Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb);
+
−
+
−#  if HAVE_ACLV_H /* HP-UX >= 11.11 */
+
−
+
−/* Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int aclv_nontrivial (int count, struct acl *entries);
+
−
+
−#  endif
+
−
+
−# elif HAVE_ACLX_GET && 0 /* AIX */
+
−
+
−/* TODO */
+
−
+
−# elif HAVE_STATACL /* older AIX */
+
−
+
−/* Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int acl_nontrivial (struct acl *a);
+
−
+
−# elif HAVE_ACLSORT /* NonStop Kernel */
+
−
+
−/* Return 1 if the given ACL is non-trivial.
+
−   Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.  */
+
−extern int acl_nontrivial (int count, struct acl *entries);
+
−
+
−# endif
+
−
+
−#endif
+
−
+
−_GL_INLINE_HEADER_END