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("$FreeBSD$"); 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 <grp.h> 45 #include <pwd.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 static int more_than_one = 0; 52 53 static void 54 usage(void) 55 { 56 57 fprintf(stderr, "getfacl [-dhnqv] [file ...]\n"); 58 } 59 60 static char * 61 getuname(uid_t uid) 62 { 63 struct passwd *pw; 64 static char uids[10]; 65 66 if ((pw = getpwuid(uid)) == NULL) { 67 (void)snprintf(uids, sizeof(uids), "%u", uid); 68 return (uids); 69 } else 70 return (pw->pw_name); 71 } 72 73 static char * 74 getgname(gid_t gid) 75 { 76 struct group *gr; 77 static char gids[10]; 78 79 if ((gr = getgrgid(gid)) == NULL) { 80 (void)snprintf(gids, sizeof(gids), "%u", gid); 81 return (gids); 82 } else 83 return (gr->gr_name); 84 } 85 86 /* 87 * return an ACL corresponding to the permissions 88 * contained in struct stat 89 */ 90 static acl_t 91 acl_from_stat(const struct stat *sb) 92 { 93 acl_t acl; 94 acl_entry_t entry; 95 acl_permset_t perms; 96 97 /* create the ACL */ 98 acl = acl_init(3); 99 if (!acl) 100 return NULL; 101 102 /* First entry: ACL_USER_OBJ */ 103 if (acl_create_entry(&acl, &entry) == -1) 104 return NULL; 105 if (acl_set_tag_type(entry, ACL_USER_OBJ) == -1) 106 return NULL; 107 108 if (acl_get_permset(entry, &perms) == -1) 109 return NULL; 110 if (acl_clear_perms(perms) == -1) 111 return NULL; 112 113 /* calculate user mode */ 114 if (sb->st_mode & S_IRUSR) 115 if (acl_add_perm(perms, ACL_READ) == -1) 116 return NULL; 117 if (sb->st_mode & S_IWUSR) 118 if (acl_add_perm(perms, ACL_WRITE) == -1) 119 return NULL; 120 if (sb->st_mode & S_IXUSR) 121 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 122 return NULL; 123 if (acl_set_permset(entry, perms) == -1) 124 return NULL; 125 126 /* Second entry: ACL_GROUP_OBJ */ 127 if (acl_create_entry(&acl, &entry) == -1) 128 return NULL; 129 if (acl_set_tag_type(entry, ACL_GROUP_OBJ) == -1) 130 return NULL; 131 132 if (acl_get_permset(entry, &perms) == -1) 133 return NULL; 134 if (acl_clear_perms(perms) == -1) 135 return NULL; 136 137 /* calculate group mode */ 138 if (sb->st_mode & S_IRGRP) 139 if (acl_add_perm(perms, ACL_READ) == -1) 140 return NULL; 141 if (sb->st_mode & S_IWGRP) 142 if (acl_add_perm(perms, ACL_WRITE) == -1) 143 return NULL; 144 if (sb->st_mode & S_IXGRP) 145 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 146 return NULL; 147 if (acl_set_permset(entry, perms) == -1) 148 return NULL; 149 150 /* Third entry: ACL_OTHER */ 151 if (acl_create_entry(&acl, &entry) == -1) 152 return NULL; 153 if (acl_set_tag_type(entry, ACL_OTHER) == -1) 154 return NULL; 155 156 if (acl_get_permset(entry, &perms) == -1) 157 return NULL; 158 if (acl_clear_perms(perms) == -1) 159 return NULL; 160 161 /* calculate other mode */ 162 if (sb->st_mode & S_IROTH) 163 if (acl_add_perm(perms, ACL_READ) == -1) 164 return NULL; 165 if (sb->st_mode & S_IWOTH) 166 if (acl_add_perm(perms, ACL_WRITE) == -1) 167 return NULL; 168 if (sb->st_mode & S_IXOTH) 169 if (acl_add_perm(perms, ACL_EXECUTE) == -1) 170 return NULL; 171 if (acl_set_permset(entry, perms) == -1) 172 return NULL; 173 174 return(acl); 175 } 176 177 static int 178 print_acl(char *path, acl_type_t type, int hflag, int iflag, int nflag, 179 int qflag, int vflag) 180 { 181 struct stat sb; 182 acl_t acl; 183 char *acl_text; 184 int error, flags = 0, ret; 185 186 if (hflag) 187 error = lstat(path, &sb); 188 else 189 error = stat(path, &sb); 190 if (error == -1) { 191 warn("%s: stat() failed", path); 192 return(-1); 193 } 194 195 if (hflag) 196 ret = lpathconf(path, _PC_ACL_NFS4); 197 else 198 ret = pathconf(path, _PC_ACL_NFS4); 199 if (ret > 0) { 200 if (type == ACL_TYPE_DEFAULT) { 201 warnx("%s: there are no default entries in NFSv4 ACLs", 202 path); 203 return (-1); 204 } 205 type = ACL_TYPE_NFS4; 206 } else if (ret < 0 && errno != EINVAL) { 207 warn("%s: pathconf(..., _PC_ACL_NFS4) failed", path); 208 return (-1); 209 } 210 211 if (more_than_one) 212 printf("\n"); 213 else 214 more_than_one++; 215 216 if (!qflag) 217 printf("# file: %s\n# owner: %s\n# group: %s\n", path, 218 getuname(sb.st_uid), getgname(sb.st_gid)); 219 220 if (hflag) 221 acl = acl_get_link_np(path, type); 222 else 223 acl = acl_get_file(path, type); 224 if (!acl) { 225 if (errno != EOPNOTSUPP) { 226 warn("%s", path); 227 return(-1); 228 } 229 errno = 0; 230 if (type == ACL_TYPE_DEFAULT) 231 return(0); 232 acl = acl_from_stat(&sb); 233 if (!acl) { 234 warn("%s: acl_from_stat() failed", path); 235 return(-1); 236 } 237 } 238 239 if (iflag) 240 flags |= ACL_TEXT_APPEND_ID; 241 242 if (nflag) 243 flags |= ACL_TEXT_NUMERIC_IDS; 244 245 if (vflag) 246 flags |= ACL_TEXT_VERBOSE; 247 248 acl_text = acl_to_text_np(acl, 0, flags); 249 if (!acl_text) { 250 warn("%s: acl_to_text_np() failed", path); 251 return(-1); 252 } 253 254 printf("%s", acl_text); 255 256 (void)acl_free(acl); 257 (void)acl_free(acl_text); 258 259 return(0); 260 } 261 262 static int 263 print_acl_from_stdin(acl_type_t type, int hflag, int iflag, int nflag, 264 int qflag, int vflag) 265 { 266 char *p, pathname[PATH_MAX]; 267 int carried_error = 0; 268 269 while (fgets(pathname, (int)sizeof(pathname), stdin)) { 270 if ((p = strchr(pathname, '\n')) != NULL) 271 *p = '\0'; 272 if (print_acl(pathname, type, hflag, iflag, nflag, 273 qflag, vflag) == -1) { 274 carried_error = -1; 275 } 276 } 277 278 return(carried_error); 279 } 280 281 int 282 main(int argc, char *argv[]) 283 { 284 acl_type_t type = ACL_TYPE_ACCESS; 285 int carried_error = 0; 286 int ch, error, i; 287 int hflag, iflag, qflag, nflag, vflag; 288 289 hflag = 0; 290 iflag = 0; 291 qflag = 0; 292 nflag = 0; 293 vflag = 0; 294 while ((ch = getopt(argc, argv, "dhinqv")) != -1) 295 switch(ch) { 296 case 'd': 297 type = ACL_TYPE_DEFAULT; 298 break; 299 case 'h': 300 hflag = 1; 301 break; 302 case 'i': 303 iflag = 1; 304 break; 305 case 'n': 306 nflag = 1; 307 break; 308 case 'q': 309 qflag = 1; 310 break; 311 case 'v': 312 vflag = 1; 313 break; 314 default: 315 usage(); 316 return(-1); 317 } 318 argc -= optind; 319 argv += optind; 320 321 if (argc == 0) { 322 error = print_acl_from_stdin(type, hflag, iflag, nflag, 323 qflag, vflag); 324 return(error ? 1 : 0); 325 } 326 327 for (i = 0; i < argc; i++) { 328 if (!strcmp(argv[i], "-")) { 329 error = print_acl_from_stdin(type, hflag, iflag, nflag, 330 qflag, vflag); 331 if (error == -1) 332 carried_error = -1; 333 } else { 334 error = print_acl(argv[i], type, hflag, iflag, nflag, 335 qflag, vflag); 336 if (error == -1) 337 carried_error = -1; 338 } 339 } 340 341 return(carried_error ? 1 : 0); 342 } 343