1 /*- 2 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson 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 /* 27 * acl_init -- return a fresh acl structure 28 * acl_dup -- duplicate an acl and return the new copy 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/types.h> 35 #include "namespace.h" 36 #include <sys/acl.h> 37 #include "un-namespace.h" 38 #include <errno.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <assert.h> 42 43 #include "acl_support.h" 44 45 #ifndef CTASSERT 46 #define CTASSERT(x) _CTASSERT(x, __LINE__) 47 #define _CTASSERT(x, y) __CTASSERT(x, y) 48 #define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1] 49 #endif 50 51 CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct)); 52 53 acl_t 54 acl_init(int count) 55 { 56 int error; 57 acl_t acl; 58 59 if (count > ACL_MAX_ENTRIES) { 60 errno = ENOMEM; 61 return (NULL); 62 } 63 if (count < 0) { 64 errno = EINVAL; 65 return (NULL); 66 } 67 68 error = posix_memalign((void *)&acl, 1 << _ACL_T_ALIGNMENT_BITS, 69 sizeof(struct acl_t_struct)); 70 if (error) { 71 errno = error; 72 return (NULL); 73 } 74 75 bzero(acl, sizeof(struct acl_t_struct)); 76 acl->ats_brand = ACL_BRAND_UNKNOWN; 77 acl->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES; 78 79 return (acl); 80 } 81 82 acl_t 83 acl_dup(acl_t acl) 84 { 85 acl_t acl_new; 86 87 acl_new = acl_init(ACL_MAX_ENTRIES); 88 if (acl_new != NULL) { 89 *acl_new = *acl; 90 acl->ats_cur_entry = 0; 91 acl_new->ats_cur_entry = 0; 92 } 93 94 return (acl_new); 95 } 96