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/*
File: __apply_mask_to_mode.c
(Linux Access Control List Management)
Copyright (C) 1999-2002
Andreas Gruenbacher, <andreas.gruenbacher@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <sys/stat.h>
#include "libacl.h"
#if defined(HAVE_ACL_ENTRIES) && \
defined (HAVE_ACL_GET_ENTRY) && defined(HAVE_ACL_GET_TAG_TYPE) && \
defined (HAVE_ACL_GET_PERMSET) && defined(HAVE_ACL_GET_PERM)
int
__apply_mask_to_mode(mode_t *mode, acl_t acl)
{
acl_entry_t entry;
int entry_id=ACL_FIRST_ENTRY;
/* A minimal ACL which has three entries has no mask entry; the
group file mode permission bits are exact. */
if (acl_entries(acl) == 3)
return 0;
while (acl_get_entry(acl, entry_id, &entry) == 1) {
acl_tag_t tag_type;
acl_get_tag_type(entry, &tag_type);
if (tag_type == ACL_MASK) {
acl_permset_t permset;
acl_get_permset(entry, &permset);
if (acl_get_perm(permset, ACL_READ) != 1)
*mode &= ~S_IRGRP;
if (acl_get_perm(permset, ACL_WRITE) != 1)
*mode &= ~S_IWGRP;
if (acl_get_perm(permset, ACL_EXECUTE) != 1)
*mode &= ~S_IXGRP;
return 0;
}
entry_id = ACL_NEXT_ENTRY;
}
/* This is unexpected; if the ACL didn't include a mask entry
we should have exited before the loop! */
*mode &= ~S_IRWXG;
return 1;
}
#endif
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