| 1 | /* Return the number of entries in an ACL. |
| 2 | |
| 3 | Copyright (C) 2002-2003, 2005-2013 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | Written by Paul Eggert and Andreas Gruenbacher. */ |
| 19 | |
| 20 | #include <config.h> |
| 21 | |
| 22 | #include "acl-internal.h" |
| 23 | |
| 24 | /* This file assumes POSIX-draft like ACLs |
| 25 | (Linux, FreeBSD, Mac OS X, IRIX, Tru64). */ |
| 26 | |
| 27 | /* Return the number of entries in ACL. |
| 28 | Return -1 and set errno upon failure to determine it. */ |
| 29 | |
| 30 | int |
| 31 | acl_entries (acl_t acl) |
| 32 | { |
| 33 | int count = 0; |
| 34 | |
| 35 | if (acl != NULL) |
| 36 | { |
| 37 | #if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD, Mac OS X */ |
| 38 | # if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */ |
| 39 | /* acl_get_entry returns 0 when it successfully fetches an entry, |
| 40 | and -1/EINVAL at the end. */ |
| 41 | acl_entry_t ace; |
| 42 | int got_one; |
| 43 | |
| 44 | for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace); |
| 45 | got_one >= 0; |
| 46 | got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace)) |
| 47 | count++; |
| 48 | # else /* Linux, FreeBSD */ |
| 49 | /* acl_get_entry returns 1 when it successfully fetches an entry, |
| 50 | and 0 at the end. */ |
| 51 | acl_entry_t ace; |
| 52 | int got_one; |
| 53 | |
| 54 | for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace); |
| 55 | got_one > 0; |
| 56 | got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace)) |
| 57 | count++; |
| 58 | if (got_one < 0) |
| 59 | return -1; |
| 60 | # endif |
| 61 | #else /* IRIX, Tru64 */ |
| 62 | # if HAVE_ACL_TO_SHORT_TEXT /* IRIX */ |
| 63 | /* Don't use acl_get_entry: it is undocumented. */ |
| 64 | count = acl->acl_cnt; |
| 65 | # endif |
| 66 | # if HAVE_ACL_FREE_TEXT /* Tru64 */ |
| 67 | /* Don't use acl_get_entry: it takes only one argument and does not |
| 68 | work. */ |
| 69 | count = acl->acl_num; |
| 70 | # endif |
| 71 | #endif |
| 72 | } |
| 73 | |
| 74 | return count; |
| 75 | } |