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 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/acl.h> 36 #include <sys/stat.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <grp.h> 41 #include <pwd.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 static int more_than_one = 0; 48 49 static void 50 usage(void) 51 { 52 53 fprintf(stderr, "getfacl [-dhnqv] [file ...]\n"); 54 } 55 56 static char * 57 getuname(uid_t uid) 58 { 59 struct passwd *pw; 60 static char uids[10]; 61 62 if ((pw = getpwuid(uid)) == NULL) { 63 (void)snprintf(uids, sizeof(uids), "%u", uid); 64 return (uids); 65 } else 66 return (pw->pw_name); 67 } 68 69 static char * 70 getgname(gid_t gid) 71 { 72 struct group *gr; 73 static char gids[10]; 74 75 if ((gr = getgrgid(gid)) == NULL) { 76 (void)snprintf(gids, sizeof(gids), "%u", gid); 77 return (gids); 78 } else 79 return (gr->gr_name); 80 } 81 82 static int 83 print_acl(char *path, acl_type_t type, int hflag, int iflag, int nflag, 84 int qflag, int vflag) 85 { 86 struct stat sb; 87 acl_t acl; 88 char *acl_text; 89 int error, flags = 0, ret; 90 91 if (hflag) 92 error = lstat(path, &sb); 93 else 94 error = stat(path, &sb); 95 if (error == -1) { 96 warn("%s: stat() failed", path); 97 return(-1); 98 } 99 100 if (hflag) 101 ret = lpathconf(path, _PC_ACL_NFS4); 102 else 103 ret = pathconf(path, _PC_ACL_NFS4); 104 if (ret > 0) { 105 if (type == ACL_TYPE_DEFAULT) { 106 warnx("%s: there are no default entries in NFSv4 ACLs", 107 path); 108 return (-1); 109 } 110 type = ACL_TYPE_NFS4; 111 } else if (ret < 0 && errno != EINVAL) { 112 warn("%s: pathconf(..., _PC_ACL_NFS4) failed", path); 113 return (-1); 114 } 115 116 if (more_than_one) 117 printf("\n"); 118 else 119 more_than_one++; 120 121 if (!qflag) 122 printf("# file: %s\n# owner: %s\n# group: %s\n", path, 123 getuname(sb.st_uid), getgname(sb.st_gid)); 124 125 if (hflag) 126 acl = acl_get_link_np(path, type); 127 else 128 acl = acl_get_file(path, type); 129 if (!acl) { 130 if (errno != EOPNOTSUPP) { 131 warn("%s", path); 132 return(-1); 133 } 134 errno = 0; 135 if (type == ACL_TYPE_DEFAULT) 136 return(0); 137 acl = acl_from_mode_np(sb.st_mode); 138 if (!acl) { 139 warn("%s: acl_from_mode() failed", path); 140 return(-1); 141 } 142 } 143 144 if (iflag) 145 flags |= ACL_TEXT_APPEND_ID; 146 147 if (nflag) 148 flags |= ACL_TEXT_NUMERIC_IDS; 149 150 if (vflag) 151 flags |= ACL_TEXT_VERBOSE; 152 153 acl_text = acl_to_text_np(acl, 0, flags); 154 if (!acl_text) { 155 warn("%s: acl_to_text_np() failed", path); 156 (void)acl_free(acl); 157 return(-1); 158 } 159 160 printf("%s", acl_text); 161 162 (void)acl_free(acl); 163 (void)acl_free(acl_text); 164 165 return(0); 166 } 167 168 static int 169 print_acl_from_stdin(acl_type_t type, int hflag, int iflag, int nflag, 170 int qflag, int vflag) 171 { 172 char *p, pathname[PATH_MAX]; 173 int carried_error = 0; 174 175 while (fgets(pathname, (int)sizeof(pathname), stdin)) { 176 if ((p = strchr(pathname, '\n')) != NULL) 177 *p = '\0'; 178 if (print_acl(pathname, type, hflag, iflag, nflag, 179 qflag, vflag) == -1) { 180 carried_error = -1; 181 } 182 } 183 184 return(carried_error); 185 } 186 187 int 188 main(int argc, char *argv[]) 189 { 190 acl_type_t type = ACL_TYPE_ACCESS; 191 int carried_error = 0; 192 int ch, error, i; 193 int hflag, iflag, qflag, nflag, vflag; 194 195 hflag = 0; 196 iflag = 0; 197 qflag = 0; 198 nflag = 0; 199 vflag = 0; 200 while ((ch = getopt(argc, argv, "dhinqv")) != -1) 201 switch(ch) { 202 case 'd': 203 type = ACL_TYPE_DEFAULT; 204 break; 205 case 'h': 206 hflag = 1; 207 break; 208 case 'i': 209 iflag = 1; 210 break; 211 case 'n': 212 nflag = 1; 213 break; 214 case 'q': 215 qflag = 1; 216 break; 217 case 'v': 218 vflag = 1; 219 break; 220 default: 221 usage(); 222 return(-1); 223 } 224 argc -= optind; 225 argv += optind; 226 227 if (argc == 0) { 228 error = print_acl_from_stdin(type, hflag, iflag, nflag, 229 qflag, vflag); 230 return(error ? 1 : 0); 231 } 232 233 for (i = 0; i < argc; i++) { 234 if (!strcmp(argv[i], "-")) { 235 error = print_acl_from_stdin(type, hflag, iflag, nflag, 236 qflag, vflag); 237 if (error == -1) 238 carried_error = -1; 239 } else { 240 error = print_acl(argv[i], type, hflag, iflag, nflag, 241 qflag, vflag); 242 if (error == -1) 243 carried_error = -1; 244 } 245 } 246 247 return(carried_error ? 1 : 0); 248 } 249