getfacl.c revision 141578
1/*- 2 * Copyright (c) 1999, 2001, 2002 Robert N M Watson 3 * All rights reserved. 4 * 5 * This software was developed by Robert Watson for the TrustedBSD Project. 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 * getfacl -- POSIX.1e utility to extract ACLs from files and directories 30 * and send the results to stdout 31 */ 32 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: head/bin/getfacl/getfacl.c 141578 2005-02-09 17:37:39Z ru $"); 36 37#include <sys/types.h> 38#include <sys/param.h> 39#include <sys/acl.h> 40#include <sys/stat.h> 41 42#include <err.h> 43#include <errno.h> 44#include <stdio.h> 45#include <stdlib.h> 46#include <string.h> 47#include <unistd.h> 48 49int more_than_one = 0; 50 51static void 52usage(void) 53{ 54 55 fprintf(stderr, "getfacl [-dh] [file ...]\n"); 56} 57 58/* 59 * return an ACL corresponding to the permissions 60 * contained in struct stat 61 */ 62static acl_t 63acl_from_stat(struct stat sb) 64{ 65 acl_t acl; 66 acl_entry_t entry; 67 acl_permset_t perms; 68 69 /* create the ACL */ 70 acl = acl_init(3); 71 if (!acl) 72 return NULL; 73 74 /* First entry: ACL_USER_OBJ */ 75 if (acl_create_entry(&acl, &entry) == -1) 76 return NULL; 77 if (acl_set_tag_type(entry, ACL_USER_OBJ) == -1) 78 return NULL; 79 80 if (acl_get_permset(entry, &perms) == -1) 81 return NULL; 82 if (acl_clear_perms(perms) == -1) 83 return NULL; 84 85 /* calculate user mode */ 86 if (sb.st_mode & S_IRUSR) 87 if (acl_add_perm(perms, ACL_READ) == -1) 88 return NULL; 89 if (sb.st_mode & S_IWUSR) 90 if (acl_add_perm(perms, ACL_WRITE) == -1) 91 return NULL; 92 if (sb.st_mode & S_IXUSR) 93 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 94 return NULL; 95 if (acl_set_permset(entry, perms) == -1) 96 return NULL; 97 98 /* Second entry: ACL_GROUP_OBJ */ 99 if (acl_create_entry(&acl, &entry) == -1) 100 return NULL; 101 if (acl_set_tag_type(entry, ACL_GROUP_OBJ) == -1) 102 return NULL; 103 104 if (acl_get_permset(entry, &perms) == -1) 105 return NULL; 106 if (acl_clear_perms(perms) == -1) 107 return NULL; 108 109 /* calculate group mode */ 110 if (sb.st_mode & S_IRGRP) 111 if (acl_add_perm(perms, ACL_READ) == -1) 112 return NULL; 113 if (sb.st_mode & S_IWGRP) 114 if (acl_add_perm(perms, ACL_WRITE) == -1) 115 return NULL; 116 if (sb.st_mode & S_IXGRP) 117 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 118 return NULL; 119 if (acl_set_permset(entry, perms) == -1) 120 return NULL; 121 122 /* Third entry: ACL_OTHER */ 123 if (acl_create_entry(&acl, &entry) == -1) 124 return NULL; 125 if (acl_set_tag_type(entry, ACL_OTHER) == -1) 126 return NULL; 127 128 if (acl_get_permset(entry, &perms) == -1) 129 return NULL; 130 if (acl_clear_perms(perms) == -1) 131 return NULL; 132 133 /* calculate other mode */ 134 if (sb.st_mode & S_IROTH) 135 if (acl_add_perm(perms, ACL_READ) == -1) 136 return NULL; 137 if (sb.st_mode & S_IWOTH) 138 if (acl_add_perm(perms, ACL_WRITE) == -1) 139 return NULL; 140 if (sb.st_mode & S_IXOTH) 141 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 142 return NULL; 143 if (acl_set_permset(entry, perms) == -1) 144 return NULL; 145 146 return(acl); 147} 148 149static int 150print_acl(char *path, acl_type_t type, int hflag) 151{ 152 struct stat sb; 153 acl_t acl; 154 char *acl_text; 155 int error; 156 157 if (hflag) 158 error = lstat(path, &sb); 159 else 160 error = stat(path, &sb); 161 if (error == -1) { 162 warn("%s", path); 163 return(-1); 164 } 165 166 if (more_than_one) 167 printf("\n"); 168 else 169 more_than_one++; 170 171 printf("#file:%s\n#owner:%d\n#group:%d\n", path, sb.st_uid, sb.st_gid); 172 173 if (hflag) 174 acl = acl_get_link_np(path, type); 175 else 176 acl = acl_get_file(path, type); 177 if (!acl) { 178 if (errno != EOPNOTSUPP) { 179 warn("%s", path); 180 return(-1); 181 } 182 errno = 0; 183 if (type != ACL_TYPE_ACCESS) 184 return(0); 185 acl = acl_from_stat(sb); 186 if (!acl) { 187 warn("acl_from_stat()"); 188 return(-1); 189 } 190 } 191 192 acl_text = acl_to_text(acl, 0); 193 if (!acl_text) { 194 warn("%s", path); 195 return(-1); 196 } 197 198 printf("%s", acl_text); 199 200 (void)acl_free(acl); 201 (void)acl_free(acl_text); 202 203 return(0); 204} 205 206static int 207print_acl_from_stdin(acl_type_t type, int hflag) 208{ 209 char *p, pathname[PATH_MAX]; 210 int carried_error = 0; 211 212 while (fgets(pathname, (int)sizeof(pathname), stdin)) { 213 if ((p = strchr(pathname, '\n')) != NULL) 214 *p = '\0'; 215 if (print_acl(pathname, type, hflag) == -1) { 216 carried_error = -1; 217 } 218 } 219 220 return(carried_error); 221} 222 223int 224main(int argc, char *argv[]) 225{ 226 acl_type_t type = ACL_TYPE_ACCESS; 227 int carried_error = 0; 228 int ch, error, i; 229 int hflag; 230 231 hflag = 0; 232 while ((ch = getopt(argc, argv, "dh")) != -1) 233 switch(ch) { 234 case 'd': 235 type = ACL_TYPE_DEFAULT; 236 break; 237 case 'h': 238 hflag = 1; 239 break; 240 default: 241 usage(); 242 return(-1); 243 } 244 argc -= optind; 245 argv += optind; 246 247 if (argc == 0) { 248 error = print_acl_from_stdin(type, hflag); 249 return(error ? 1 : 0); 250 } 251 252 for (i = 0; i < argc; i++) { 253 if (!strcmp(argv[i], "-")) { 254 error = print_acl_from_stdin(type, hflag); 255 if (error == -1) 256 carried_error = -1; 257 } else { 258 error = print_acl(argv[i], type, hflag); 259 if (error == -1) 260 carried_error = -1; 261 } 262 } 263 264 return(carried_error ? 1 : 0); 265} 266