acl_entry.c revision 90781
1/* 2 * Copyright (c) 2001-2002 Chris D. Faulhaber 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/lib/libc/posix1e/acl_entry.c 90781 2002-02-17 20:05:20Z jedgar $ 27 */ 28 29#include <sys/types.h> 30#include "namespace.h" 31#include <sys/acl.h> 32#include "un-namespace.h" 33 34#include <errno.h> 35#include <stdlib.h> 36 37/* 38 * acl_create_entry() (23.4.7): create a new ACL entry in the ACL pointed 39 * to by acl_p. 40 */ 41int 42acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p) 43{ 44 struct acl *acl_int; 45 46 if (acl_p == NULL) { 47 errno = EINVAL; 48 return (-1); 49 } 50 51 acl_int = &(*acl_p)->ats_acl; 52 53 if ((acl_int->acl_cnt >= ACL_MAX_ENTRIES) || (acl_int->acl_cnt < 0)) { 54 errno = EINVAL; 55 return (-1); 56 } 57 58 *entry_p = &acl_int->acl_entry[acl_int->acl_cnt++]; 59 60 (**entry_p).ae_tag = ACL_UNDEFINED_TAG; 61 (**entry_p).ae_id = ACL_UNDEFINED_ID; 62 (**entry_p).ae_perm = ACL_PERM_NONE; 63 64 (*acl_p)->ats_cur_entry = 0; 65 66 return (0); 67} 68 69/* 70 * acl_get_entry() (23.4.14): returns an ACL entry from an ACL 71 * indicated by entry_id. 72 */ 73int 74acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p) 75{ 76 struct acl *acl_int; 77 78 if (acl == NULL) { 79 errno = EINVAL; 80 return (-1); 81 } 82 acl_int = &acl->ats_acl; 83 84 switch(entry_id) { 85 case ACL_FIRST_ENTRY: 86 acl->ats_cur_entry = 0; 87 /* PASSTHROUGH */ 88 case ACL_NEXT_ENTRY: 89 if (acl->ats_cur_entry >= acl->ats_acl.acl_cnt) 90 return 0; 91 *entry_p = &acl_int->acl_entry[acl->ats_cur_entry++]; 92 return (1); 93 } 94 95 errno = EINVAL; 96 return (-1); 97} 98