1 /* Return the number of entries in an ACL. 2 3 Copyright (C) 2002-2003, 2005-2009 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, MacOS 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, MacOS X */ 38 # if HAVE_ACL_TYPE_EXTENDED /* MacOS 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 } 76
