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/*
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File: __apply_mask_to_mode.c
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(Linux Access Control List Management)
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Copyright (C) 1999-2002
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Andreas Gruenbacher, <a.gruenbacher@bestbits.at>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <sys/stat.h>
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#include "libacl.h"
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#if defined(HAVE_ACL_ENTRIES) && \
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defined (HAVE_ACL_GET_ENTRY) && defined(HAVE_ACL_GET_TAG_TYPE) && \
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defined (HAVE_ACL_GET_PERMSET) && defined(HAVE_ACL_GET_PERM)
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int
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__apply_mask_to_mode(mode_t *mode, acl_t acl)
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{
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acl_entry_t entry;
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int entry_id=ACL_FIRST_ENTRY;
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/* A mimimal ACL which has three entries has no mask entry; the
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group file mode permission bits are exact. */
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if (acl_entries(acl) == 3)
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return 0;
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while (acl_get_entry(acl, entry_id, &entry) == 1) {
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acl_tag_t tag_type;
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acl_get_tag_type(entry, &tag_type);
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if (tag_type == ACL_MASK) {
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acl_permset_t permset;
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acl_get_permset(entry, &permset);
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if (acl_get_perm(permset, ACL_READ) != 1)
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*mode &= ~S_IRGRP;
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if (acl_get_perm(permset, ACL_WRITE) != 1)
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*mode &= ~S_IWGRP;
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if (acl_get_perm(permset, ACL_EXECUTE) != 1)
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*mode &= ~S_IXGRP;
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return 0;
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}
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entry_id = ACL_NEXT_ENTRY;
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}
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/* This is unexpected; if the ACL didn't include a mask entry
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we should have exited before the loop! */
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*mode &= ~S_IRWXG;
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return 1;
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}
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#endif
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