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76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Return the number of entries in an ACL.
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Copyright (C) 2002-2003, 2005-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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Written by Paul Eggert and Andreas Gruenbacher. */
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#include <config.h>
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#include "acl-internal.h"
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/* This file assumes POSIX-draft like ACLs
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(Linux, FreeBSD, Mac OS X, IRIX, Tru64, Cygwin >= 2.5). */
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/* Return the number of entries in ACL.
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Return -1 and set errno upon failure to determine it. */
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int
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acl_entries (acl_t acl)
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{
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int count = 0;
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if (acl != NULL)
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{
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#if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD, Mac OS X, Cygwin >= 2.5 */
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# if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */
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/* acl_get_entry returns 0 when it successfully fetches an entry,
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and -1/EINVAL at the end. */
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acl_entry_t ace;
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int got_one;
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for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace);
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got_one >= 0;
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got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace))
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count++;
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# else /* Linux, FreeBSD, Cygwin >= 2.5 */
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/* acl_get_entry returns 1 when it successfully fetches an entry,
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and 0 at the end. */
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acl_entry_t ace;
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int got_one;
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for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace);
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got_one > 0;
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got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace))
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count++;
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if (got_one < 0)
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return -1;
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# endif
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#else /* IRIX, Tru64 */
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# if HAVE_ACL_TO_SHORT_TEXT /* IRIX */
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/* Don't use acl_get_entry: it is undocumented. */
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count = acl->acl_cnt;
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# endif
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# if HAVE_ACL_FREE_TEXT /* Tru64 */
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/* Don't use acl_get_entry: it takes only one argument and does not
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work. */
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count = acl->acl_num;
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# endif
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#endif
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}
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return count;
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}
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