1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * acl_init -- return a fresh acl structure 30 * acl_dup -- duplicate an acl and return the new copy 31 */ 32 33 #include <sys/types.h> 34 #include "namespace.h" 35 #include <sys/acl.h> 36 #include "un-namespace.h" 37 #include <errno.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <assert.h> 41 42 #include "acl_support.h" 43 44 #ifndef CTASSERT 45 #define CTASSERT(x) _CTASSERT(x, __LINE__) 46 #define _CTASSERT(x, y) __CTASSERT(x, y) 47 #define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1] 48 #endif 49 50 CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct)); 51 52 acl_t 53 acl_init(int count) 54 { 55 int error; 56 acl_t acl; 57 58 if (count > ACL_MAX_ENTRIES) { 59 errno = ENOMEM; 60 return (NULL); 61 } 62 if (count < 0) { 63 errno = EINVAL; 64 return (NULL); 65 } 66 67 error = posix_memalign((void *)&acl, 1 << _ACL_T_ALIGNMENT_BITS, 68 sizeof(struct acl_t_struct)); 69 if (error) { 70 errno = error; 71 return (NULL); 72 } 73 74 bzero(acl, sizeof(struct acl_t_struct)); 75 acl->ats_brand = ACL_BRAND_UNKNOWN; 76 acl->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 77 78 return (acl); 79 } 80 81 acl_t 82 acl_dup(acl_t acl) 83 { 84 acl_t acl_new; 85 86 acl_new = acl_init(ACL_MAX_ENTRIES); 87 if (acl_new != NULL) { 88 *acl_new = *acl; 89 acl->ats_cur_entry = 0; 90 acl_new->ats_cur_entry = 0; 91 } 92 93 return (acl_new); 94 } 95