1 /* Internal implementation of access control lists.
3 Copyright (C) 2002-2003, 2005-2011 Free Software Foundation, Inc.
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.
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.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 Written by Paul Eggert, Andreas Grünbacher, and Bruno Haible. */
25 /* All systems define the ACL related API in <sys/acl.h>. */
29 #if defined HAVE_FACL && ! defined GETACLCNT && defined ACL_CNT
30 # define GETACLCNT ACL_CNT
33 /* On Linux, additional ACL related API is available in <acl/libacl.h>. */
34 #ifdef HAVE_ACL_LIBACL_H
35 # include <acl/libacl.h>
38 /* On HP-UX >= 11.11, additional ACL API is available in <aclv.h>. */
40 # include <sys/types.h>
42 /* HP-UX 11.11 lacks these declarations. */
43 extern int acl (char *, int, int, struct acl *);
44 extern int aclsort (int, int, struct acl *);
59 # define HAVE_FCHMOD false
60 # define fchmod(fd, mode) (-1)
63 /* Recognize some common errors such as from an NFS mount that does
64 not support ACLs, even when local drives do. */
65 #if defined __APPLE__ && defined __MACH__ /* MacOS X */
66 # define ACL_NOT_WELL_SUPPORTED(Err) \
67 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == ENOENT)
68 #elif defined EOPNOTSUPP /* Tru64 NFS */
69 # define ACL_NOT_WELL_SUPPORTED(Err) \
70 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == EOPNOTSUPP)
72 # define ACL_NOT_WELL_SUPPORTED(Err) \
73 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY)
78 # if HAVE_ACL_GET_FILE
79 /* POSIX 1003.1e (draft 17 -- abandoned) specific version. */
80 /* Linux, FreeBSD, MacOS X, IRIX, Tru64 */
82 # ifndef MIN_ACL_ENTRIES
83 # define MIN_ACL_ENTRIES 4
86 /* POSIX 1003.1e (draft 17) */
87 # ifdef HAVE_ACL_GET_FD
88 /* Most platforms have a 1-argument acl_get_fd, only OSF/1 has a 2-argument
90 # if HAVE_ACL_FREE_TEXT /* OSF/1 */
92 rpl_acl_get_fd (int fd)
94 return acl_get_fd (fd, ACL_TYPE_ACCESS);
97 # define acl_get_fd rpl_acl_get_fd
100 # define HAVE_ACL_GET_FD false
102 # define acl_get_fd(fd) (NULL)
105 /* POSIX 1003.1e (draft 17) */
106 # ifdef HAVE_ACL_SET_FD
107 /* Most platforms have a 2-argument acl_set_fd, only OSF/1 has a 3-argument
109 # if HAVE_ACL_FREE_TEXT /* OSF/1 */
111 rpl_acl_set_fd (int fd, acl_t acl)
113 return acl_set_fd (fd, ACL_TYPE_ACCESS, acl);
116 # define acl_set_fd rpl_acl_set_fd
119 # define HAVE_ACL_SET_FD false
121 # define acl_set_fd(fd, acl) (-1)
124 /* POSIX 1003.1e (draft 13) */
125 # if ! HAVE_ACL_FREE_TEXT
126 # define acl_free_text(buf) acl_free (buf)
130 # ifndef HAVE_ACL_EXTENDED_FILE
131 # define HAVE_ACL_EXTENDED_FILE false
132 # define acl_extended_file(name) (-1)
136 # ifndef HAVE_ACL_EXTENDED_FILE_NOFOLLOW
137 # define HAVE_ACL_EXTENDED_FILE_NOFOLLOW false
138 # define acl_extended_file_nofollow(name) (-1)
142 # ifndef HAVE_ACL_FROM_MODE
143 # define HAVE_ACL_FROM_MODE false
144 # define acl_from_mode(mode) (NULL)
147 /* Set to 1 if a file's mode is implicit by the ACL.
148 Set to 0 if a file's mode is stored independently from the ACL. */
149 # if HAVE_ACL_COPY_EXT_NATIVE && HAVE_ACL_CREATE_ENTRY_NP /* MacOS X */
150 # define MODE_INSIDE_ACL 0
152 # define MODE_INSIDE_ACL 1
155 /* Return the number of entries in ACL.
156 Return -1 and set errno upon failure to determine it. */
157 /* Define a replacement for acl_entries if needed. (Only Linux has it.) */
158 # if !HAVE_ACL_ENTRIES
159 # define acl_entries rpl_acl_entries
160 extern int acl_entries (acl_t);
163 # if HAVE_ACL_TYPE_EXTENDED /* MacOS X */
164 /* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED.
165 Return 1 if the given ACL is non-trivial.
166 Return 0 if it is trivial. */
167 extern int acl_extended_nontrivial (acl_t);
169 /* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS.
170 Return 1 if the given ACL is non-trivial.
171 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
172 Return -1 and set errno upon failure to determine it. */
173 extern int acl_access_nontrivial (acl_t);
176 # elif HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
178 /* Set to 1 if a file's mode is implicit by the ACL.
179 Set to 0 if a file's mode is stored independently from the ACL. */
180 # if defined __CYGWIN__ /* Cygwin */
181 # define MODE_INSIDE_ACL 0
183 # define MODE_INSIDE_ACL 1
186 # if !defined ACL_NO_TRIVIAL /* Solaris <= 10, Cygwin */
188 /* Return 1 if the given ACL is non-trivial.
189 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
190 extern int acl_nontrivial (int count, aclent_t *entries);
192 # ifdef ACE_GETACL /* Solaris 10 */
194 /* Test an ACL retrieved with ACE_GETACL.
195 Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
196 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
197 extern int acl_ace_nontrivial (int count, ace_t *entries);
199 /* Definitions for when the built executable is executed on Solaris 10
200 (newer version) or Solaris 11. */
202 # define ACE_ACCESS_ALLOWED_ACE_TYPE 0 /* replaces ALLOW */
203 # define ACE_ACCESS_DENIED_ACE_TYPE 1 /* replaces DENY */
205 # define NEW_ACE_OWNER 0x1000
206 # define NEW_ACE_GROUP 0x2000
207 # define NEW_ACE_IDENTIFIER_GROUP 0x0040
208 # define ACE_EVERYONE 0x4000
209 /* For a_access_mask. */
210 # define NEW_ACE_READ_DATA 0x001 /* corresponds to 'r' */
211 # define NEW_ACE_WRITE_DATA 0x002 /* corresponds to 'w' */
212 # define NEW_ACE_EXECUTE 0x004 /* corresponds to 'x' */
218 # elif HAVE_GETACL /* HP-UX */
220 /* Return 1 if the given ACL is non-trivial.
221 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
222 extern int acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb);
224 # if HAVE_ACLV_H /* HP-UX >= 11.11 */
226 /* Return 1 if the given ACL is non-trivial.
227 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
228 extern int aclv_nontrivial (int count, struct acl *entries);
232 # elif HAVE_ACLX_GET && 0 /* AIX */
236 # elif HAVE_STATACL /* older AIX */
238 /* Return 1 if the given ACL is non-trivial.
239 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
240 extern int acl_nontrivial (struct acl *a);
242 # elif HAVE_ACLSORT /* NonStop Kernel */
244 /* Return 1 if the given ACL is non-trivial.
245 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
246 extern int acl_nontrivial (int count, struct acl *entries);