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>
50 # define HAVE_FCHMOD false
51 # define fchmod(fd, mode) (-1)
54 /* Recognize some common errors such as from an NFS mount that does
55 not support ACLs, even when local drives do. */
56 #if defined __APPLE__ && defined __MACH__ /* MacOS X */
57 # define ACL_NOT_WELL_SUPPORTED(Err) \
58 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == ENOENT)
59 #elif defined EOPNOTSUPP /* Tru64 NFS */
60 # define ACL_NOT_WELL_SUPPORTED(Err) \
61 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY || (Err) == EOPNOTSUPP)
63 # define ACL_NOT_WELL_SUPPORTED(Err) \
64 ((Err) == ENOTSUP || (Err) == ENOSYS || (Err) == EINVAL || (Err) == EBUSY)
69 # if HAVE_ACL_GET_FILE
70 /* POSIX 1003.1e (draft 17 -- abandoned) specific version. */
71 /* Linux, FreeBSD, MacOS X, IRIX, Tru64 */
73 # ifndef MIN_ACL_ENTRIES
74 # define MIN_ACL_ENTRIES 4
77 /* POSIX 1003.1e (draft 17) */
78 # ifdef HAVE_ACL_GET_FD
79 /* Most platforms have a 1-argument acl_get_fd, only OSF/1 has a 2-argument
81 # if HAVE_ACL_FREE_TEXT /* OSF/1 */
83 rpl_acl_get_fd (int fd)
85 return acl_get_fd (fd, ACL_TYPE_ACCESS);
88 # define acl_get_fd rpl_acl_get_fd
91 # define HAVE_ACL_GET_FD false
93 # define acl_get_fd(fd) (NULL)
96 /* POSIX 1003.1e (draft 17) */
97 # ifdef HAVE_ACL_SET_FD
98 /* Most platforms have a 2-argument acl_set_fd, only OSF/1 has a 3-argument
100 # if HAVE_ACL_FREE_TEXT /* OSF/1 */
102 rpl_acl_set_fd (int fd, acl_t acl)
104 return acl_set_fd (fd, ACL_TYPE_ACCESS, acl);
107 # define acl_set_fd rpl_acl_set_fd
110 # define HAVE_ACL_SET_FD false
112 # define acl_set_fd(fd, acl) (-1)
115 /* POSIX 1003.1e (draft 13) */
116 # if ! HAVE_ACL_FREE_TEXT
117 # define acl_free_text(buf) acl_free (buf)
121 # ifndef HAVE_ACL_EXTENDED_FILE
122 # define HAVE_ACL_EXTENDED_FILE false
123 # define acl_extended_file(name) (-1)
127 # ifndef HAVE_ACL_FROM_MODE
128 # define HAVE_ACL_FROM_MODE false
129 # define acl_from_mode(mode) (NULL)
132 /* Set to 1 if a file's mode is implicit by the ACL.
133 Set to 0 if a file's mode is stored independently from the ACL. */
134 # if HAVE_ACL_COPY_EXT_NATIVE && HAVE_ACL_CREATE_ENTRY_NP /* MacOS X */
135 # define MODE_INSIDE_ACL 0
137 # define MODE_INSIDE_ACL 1
140 /* Return the number of entries in ACL.
141 Return -1 and set errno upon failure to determine it. */
142 /* Define a replacement for acl_entries if needed. (Only Linux has it.) */
143 # if !HAVE_ACL_ENTRIES
144 # define acl_entries rpl_acl_entries
145 extern int acl_entries (acl_t);
148 # if HAVE_ACL_TYPE_EXTENDED /* MacOS X */
149 /* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED.
150 Return 1 if the given ACL is non-trivial.
151 Return 0 if it is trivial. */
152 extern int acl_extended_nontrivial (acl_t);
154 /* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS.
155 Return 1 if the given ACL is non-trivial.
156 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode.
157 Return -1 and set errno upon failure to determine it. */
158 extern int acl_access_nontrivial (acl_t);
161 # elif HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */
163 /* Set to 1 if a file's mode is implicit by the ACL.
164 Set to 0 if a file's mode is stored independently from the ACL. */
165 # if defined __CYGWIN__ /* Cygwin */
166 # define MODE_INSIDE_ACL 0
168 # define MODE_INSIDE_ACL 1
171 # if !defined ACL_NO_TRIVIAL /* Solaris <= 10, Cygwin */
173 /* Return 1 if the given ACL is non-trivial.
174 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
175 extern int acl_nontrivial (int count, aclent_t *entries);
177 # ifdef ACE_GETACL /* Solaris 10 */
179 /* Test an ACL retrieved with ACE_GETACL.
180 Return 1 if the given ACL, consisting of COUNT entries, is non-trivial.
181 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
182 extern int acl_ace_nontrivial (int count, ace_t *entries);
184 /* Definitions for when the built executable is executed on Solaris 10
185 (newer version) or Solaris 11. */
187 # define ACE_ACCESS_ALLOWED_ACE_TYPE 0 /* replaces ALLOW */
188 # define ACE_ACCESS_DENIED_ACE_TYPE 1 /* replaces DENY */
190 # define NEW_ACE_OWNER 0x1000
191 # define NEW_ACE_GROUP 0x2000
192 # define NEW_ACE_IDENTIFIER_GROUP 0x0040
193 # define ACE_EVERYONE 0x4000
194 /* For a_access_mask. */
195 # define NEW_ACE_READ_DATA 0x001 /* corresponds to 'r' */
196 # define NEW_ACE_WRITE_DATA 0x002 /* corresponds to 'w' */
197 # define NEW_ACE_EXECUTE 0x004 /* corresponds to 'x' */
203 # elif HAVE_GETACL /* HP-UX */
205 /* Return 1 if the given ACL is non-trivial.
206 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
207 extern int acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb);
209 # elif HAVE_ACLX_GET && 0 /* AIX */
213 # elif HAVE_STATACL /* older AIX */
215 /* Return 1 if the given ACL is non-trivial.
216 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
217 extern int acl_nontrivial (struct acl *a);
219 # elif HAVE_ACLSORT /* NonStop Kernel */
221 /* Return 1 if the given ACL is non-trivial.
222 Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */
223 extern int acl_nontrivial (int count, struct acl *entries);