getfacl.c revision 172237
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 172237 2007-09-19 02:04:47Z kevlo $"); 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 51int more_than_one = 0; 52 53static void 54usage(void) 55{ 56 57 fprintf(stderr, "getfacl [-dhq] [file ...]\n"); 58} 59 60static char * 61getuname(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 73static char * 74getgname(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 */ 90static acl_t 91acl_from_stat(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 177static int 178print_acl(char *path, acl_type_t type, int hflag, int qflag) 179{ 180 struct stat sb; 181 acl_t acl; 182 char *acl_text; 183 int error; 184 185 if (hflag) 186 error = lstat(path, &sb); 187 else 188 error = stat(path, &sb); 189 if (error == -1) { 190 warn("%s", path); 191 return(-1); 192 } 193 194 if (more_than_one) 195 printf("\n"); 196 else 197 more_than_one++; 198 199 if (!qflag) 200 printf("# file: %s\n# owner: %s\n# group: %s\n", path, 201 getuname(sb.st_uid), getgname(sb.st_gid)); 202 203 if (hflag) 204 acl = acl_get_link_np(path, type); 205 else 206 acl = acl_get_file(path, type); 207 if (!acl) { 208 if (errno != EOPNOTSUPP) { 209 warn("%s", path); 210 return(-1); 211 } 212 errno = 0; 213 if (type != ACL_TYPE_ACCESS) 214 return(0); 215 acl = acl_from_stat(sb); 216 if (!acl) { 217 warn("acl_from_stat()"); 218 return(-1); 219 } 220 } 221 222 acl_text = acl_to_text(acl, 0); 223 if (!acl_text) { 224 warn("%s", path); 225 return(-1); 226 } 227 228 printf("%s", acl_text); 229 230 (void)acl_free(acl); 231 (void)acl_free(acl_text); 232 233 return(0); 234} 235 236static int 237print_acl_from_stdin(acl_type_t type, int hflag, int qflag) 238{ 239 char *p, pathname[PATH_MAX]; 240 int carried_error = 0; 241 242 while (fgets(pathname, (int)sizeof(pathname), stdin)) { 243 if ((p = strchr(pathname, '\n')) != NULL) 244 *p = '\0'; 245 if (print_acl(pathname, type, hflag, qflag) == -1) { 246 carried_error = -1; 247 } 248 } 249 250 return(carried_error); 251} 252 253int 254main(int argc, char *argv[]) 255{ 256 acl_type_t type = ACL_TYPE_ACCESS; 257 int carried_error = 0; 258 int ch, error, i; 259 int hflag, qflag; 260 261 hflag = 0; 262 qflag = 0; 263 while ((ch = getopt(argc, argv, "dhq")) != -1) 264 switch(ch) { 265 case 'd': 266 type = ACL_TYPE_DEFAULT; 267 break; 268 case 'h': 269 hflag = 1; 270 break; 271 case 'q': 272 qflag = 1; 273 break; 274 default: 275 usage(); 276 return(-1); 277 } 278 argc -= optind; 279 argv += optind; 280 281 if (argc == 0) { 282 error = print_acl_from_stdin(type, hflag, qflag); 283 return(error ? 1 : 0); 284 } 285 286 for (i = 0; i < argc; i++) { 287 if (!strcmp(argv[i], "-")) { 288 error = print_acl_from_stdin(type, hflag, qflag); 289 if (error == -1) 290 carried_error = -1; 291 } else { 292 error = print_acl(argv[i], type, hflag, qflag); 293 if (error == -1) 294 carried_error = -1; 295 } 296 } 297 298 return(carried_error ? 1 : 0); 299} 300