/* Return the number of entries in an ACL.
- Copyright (C) 2002, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002-2003, 2005-2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
Written by Paul Eggert and Andreas Gruenbacher. */
#include "acl-internal.h"
-/* Return the number of entries in ACL. */
+/* This file assumes POSIX-draft like ACLs
+ (Linux, FreeBSD, MacOS X, IRIX, Tru64). */
+
+/* Return the number of entries in ACL.
+ Return -1 and set errno upon failure to determine it. */
int
acl_entries (acl_t acl)
{
- char *t;
- int entries = 0;
- char *text = acl_to_text (acl, NULL);
- if (! text)
- return -1;
- for (t = text; *t; t++)
- entries += (*t == '\n');
- acl_free (text);
- return entries;
+ int count = 0;
+
+ if (acl != NULL)
+ {
+#if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD, MacOS X */
+# if HAVE_ACL_TYPE_EXTENDED /* MacOS 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 */
+ /* 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;
}