| /* Internal implementation of access control lists. |
| |
| Copyright (C) 2002-2003, 2005-2009 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_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 |
| |
| #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 |
| |
| /* 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 /* MacOS 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_ACL && 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 |
| |
| # if !defined ACL_NO_TRIVIAL /* Solaris <= 10, Cygwin */ |
| |
| /* 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 ACE_ACCESS_ALLOWED_ACE_TYPE 0 /* replaces ALLOW */ |
| # define ACE_ACCESS_DENIED_ACE_TYPE 1 /* replaces DENY */ |
| /* For a_flags. */ |
| # define NEW_ACE_OWNER 0x1000 |
| # define NEW_ACE_GROUP 0x2000 |
| # define NEW_ACE_IDENTIFIER_GROUP 0x0040 |
| # define 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_EXECUTE 0x004 /* corresponds to 'x' */ |
| |
| # endif |
| |
| # 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); |
| |
| # 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); |
| |
| # endif |
| |
| #endif |