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/* Return the number of entries in an ACL.
Copyright (C) 2002-2003, 2005-2023 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 <https://www.gnu.org/licenses/>.
Written by Paul Eggert and Andreas Gruenbacher. */
#include <config.h>
#include "acl-internal.h"
/* This file assumes POSIX-draft like ACLs
(Linux, FreeBSD, Mac OS X, IRIX, Tru64, Cygwin >= 2.5). */
/* Return the number of entries in ACL.
Return -1 and set errno upon failure to determine it. */
int
acl_entries (acl_t acl)
{
int count = 0;
if (acl != NULL)
{
#if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD, Mac OS X, Cygwin >= 2.5 */
# if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */
/* acl_get_entry returns 0 when it successfully fetches an entry,
and -1/EINVAL at the end. */
acl_entry_t ace;
int got_one;
for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace);
got_one >= 0;
got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace))
count++;
# else /* Linux, FreeBSD, Cygwin >= 2.5 */
/* acl_get_entry returns 1 when it successfully fetches an entry,
and 0 at the end. */
acl_entry_t ace;
int got_one;
for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace);
got_one > 0;
got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace))
count++;
if (got_one < 0)
return -1;
# endif
#else /* IRIX, Tru64 */
# if HAVE_ACL_TO_SHORT_TEXT /* IRIX */
/* Don't use acl_get_entry: it is undocumented. */
count = acl->acl_cnt;
# endif
# if HAVE_ACL_FREE_TEXT /* Tru64 */
/* Don't use acl_get_entry: it takes only one argument and does not
work. */
count = acl->acl_num;
# endif
#endif
}
return count;
}
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