acl_to_text.c revision 89831
1/*- 2 * Copyright (c) 1999-2002 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 * $FreeBSD: head/lib/libc/posix1e/acl_to_text.c 89831 2002-01-26 19:32:50Z jedgar $ 27 */ 28/* 29 * acl_to_text - return a text string with a text representation of the acl 30 * in it. 31 */ 32 33#include <sys/types.h> 34#include "namespace.h" 35#include <sys/acl.h> 36#include "un-namespace.h" 37#include <sys/errno.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <string.h> 41#include <utmp.h> 42 43#include "acl_support.h" 44 45/* 46 * acl_to_text - generate a text form of an acl 47 * spec says nothing about output ordering, so leave in acl order 48 * 49 * This function will not produce nice results if it is called with 50 * a non-POSIX.1e semantics ACL. 51 */ 52char * 53acl_to_text(acl_t acl, ssize_t *len_p) 54{ 55 struct acl *acl_int; 56 char *buf, *tmpbuf; 57 char name_buf[UT_NAMESIZE+1]; 58 char perm_buf[_POSIX1E_ACL_STRING_PERM_MAXSIZE+1], 59 effective_perm_buf[_POSIX1E_ACL_STRING_PERM_MAXSIZE+1]; 60 int i, error, len; 61 uid_t ae_id; 62 acl_tag_t ae_tag; 63 acl_perm_t ae_perm, effective_perm, mask_perm; 64 65 buf = strdup(""); 66 if (!buf) 67 return(NULL); 68 69 if (acl == NULL) { 70 errno = EINVAL; 71 return(NULL); 72 } 73 74 acl_int = &acl->ats_acl; 75 76 mask_perm = ACL_PERM_BITS; /* effective is regular if no mask */ 77 for (i = 0; i < acl_int->acl_cnt; i++) 78 if (acl_int->acl_entry[i].ae_tag == ACL_MASK) 79 mask_perm = acl_int->acl_entry[i].ae_perm; 80 81 for (i = 0; i < acl_int->acl_cnt; i++) { 82 ae_tag = acl_int->acl_entry[i].ae_tag; 83 ae_id = acl_int->acl_entry[i].ae_id; 84 ae_perm = acl_int->acl_entry[i].ae_perm; 85 86 switch(ae_tag) { 87 case ACL_USER_OBJ: 88 error = _posix1e_acl_perm_to_string(ae_perm, 89 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 90 if (error) 91 goto error_label; 92 len = asprintf(&tmpbuf, "%suser::%s\n", buf, 93 perm_buf); 94 if (len == -1) 95 goto error_label; 96 free(buf); 97 buf = tmpbuf; 98 break; 99 100 case ACL_USER: 101 error = _posix1e_acl_perm_to_string(ae_perm, 102 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 103 if (error) 104 goto error_label; 105 106 error = _posix1e_acl_id_to_name(ae_tag, ae_id, 107 UT_NAMESIZE+1, name_buf); 108 if (error) 109 goto error_label; 110 111 effective_perm = ae_perm & mask_perm; 112 if (effective_perm != ae_perm) { 113 error = _posix1e_acl_perm_to_string( 114 effective_perm, 115 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, 116 effective_perm_buf); 117 if (error) 118 goto error_label; 119 len = asprintf(&tmpbuf, "%suser:%s:%s\t\t# " 120 "effective: %s\n", 121 buf, name_buf, perm_buf, 122 effective_perm_buf); 123 } else { 124 len = asprintf(&tmpbuf, "%suser:%s:%s\n", buf, 125 name_buf, perm_buf); 126 } 127 if (len == -1) 128 goto error_label; 129 free(buf); 130 buf = tmpbuf; 131 break; 132 133 case ACL_GROUP_OBJ: 134 error = _posix1e_acl_perm_to_string(ae_perm, 135 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 136 if (error) 137 goto error_label; 138 139 effective_perm = ae_perm & mask_perm; 140 if (effective_perm != ae_perm) { 141 error = _posix1e_acl_perm_to_string( 142 effective_perm, 143 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, 144 effective_perm_buf); 145 if (error) 146 goto error_label; 147 len = asprintf(&tmpbuf, "%sgroup::%s\t\t# " 148 "effective: %s\n", 149 buf, perm_buf, effective_perm_buf); 150 } else { 151 len = asprintf(&tmpbuf, "%sgroup::%s\n", buf, 152 perm_buf); 153 } 154 if (len == -1) 155 goto error_label; 156 free(buf); 157 buf = tmpbuf; 158 break; 159 160 case ACL_GROUP: 161 error = _posix1e_acl_perm_to_string(ae_perm, 162 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 163 if (error) 164 goto error_label; 165 166 error = _posix1e_acl_id_to_name(ae_tag, ae_id, 167 UT_NAMESIZE+1, name_buf); 168 if (error) 169 goto error_label; 170 171 effective_perm = ae_perm & mask_perm; 172 if (effective_perm != ae_perm) { 173 error = _posix1e_acl_perm_to_string( 174 effective_perm, 175 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, 176 effective_perm_buf); 177 if (error) 178 goto error_label; 179 len = asprintf(&tmpbuf, "%sgroup::%s\t\t# " 180 "effective: %s\n", 181 buf, perm_buf, effective_perm_buf); 182 } else { 183 len = asprintf(&tmpbuf, "%sgroup:%s:%s\n", buf, 184 name_buf, perm_buf); 185 } 186 if (len == -1) 187 goto error_label; 188 free(buf); 189 buf = tmpbuf; 190 break; 191 192 case ACL_MASK: 193 error = _posix1e_acl_perm_to_string(ae_perm, 194 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 195 if (error) 196 goto error_label; 197 198 len = asprintf(&tmpbuf, "%smask::%s\n", buf, 199 perm_buf); 200 if (len == -1) 201 goto error_label; 202 free(buf); 203 buf = tmpbuf; 204 break; 205 206 case ACL_OTHER: 207 error = _posix1e_acl_perm_to_string(ae_perm, 208 _POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf); 209 if (error) 210 goto error_label; 211 212 len = asprintf(&tmpbuf, "%sother::%s\n", buf, 213 perm_buf); 214 if (len == -1) 215 goto error_label; 216 free(buf); 217 buf = tmpbuf; 218 break; 219 220 default: 221 errno = EINVAL; 222 goto error_label; 223 } 224 } 225 226 if (len_p) { 227 *len_p = strlen(buf); 228 } 229 return (buf); 230 231error_label: 232 /* jump to here sets errno already, we just clean up */ 233 if (buf) free(buf); 234 return (NULL); 235} 236