1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2002, 2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2002 Poul-Henning Kamp. 6 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson 7 * All rights reserved. 8 * 9 * This software was developed for the FreeBSD Project by Poul-Henning 10 * Kamp and Network Associates Laboratories, the Security Research Division 11 * of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 12 * ("CBOSS"), as part of the DARPA CHATS research program 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The names of the authors may not be used to endorse or promote 23 * products derived from this software without specific prior written 24 * permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * $FreeBSD$ 39 */ 40 41 #include <sys/types.h> 42 #include <sys/sbuf.h> 43 #include <sys/uio.h> 44 #include <sys/extattr.h> 45 46 #include <libgen.h> 47 #include <libutil.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <vis.h> 53 #include <err.h> 54 #include <errno.h> 55 56 static enum { EADUNNO, EAGET, EASET, EARM, EALS } what = EADUNNO; 57 58 static void __dead2 59 usage(void) 60 { 61 62 switch (what) { 63 case EAGET: 64 fprintf(stderr, "usage: getextattr [-fhqsx] attrnamespace"); 65 fprintf(stderr, " attrname filename ...\n"); 66 exit(-1); 67 case EASET: 68 fprintf(stderr, "usage: setextattr [-fhnq] attrnamespace"); 69 fprintf(stderr, " attrname attrvalue filename ...\n"); 70 fprintf(stderr, " or setextattr -i [-fhnq] attrnamespace"); 71 fprintf(stderr, " attrname filename ...\n"); 72 exit(-1); 73 case EARM: 74 fprintf(stderr, "usage: rmextattr [-fhq] attrnamespace"); 75 fprintf(stderr, " attrname filename ...\n"); 76 exit(-1); 77 case EALS: 78 fprintf(stderr, "usage: lsextattr [-fhq] attrnamespace"); 79 fprintf(stderr, " filename ...\n"); 80 exit(-1); 81 case EADUNNO: 82 default: 83 fprintf(stderr, "usage: (getextattr|lsextattr|rmextattr"); 84 fprintf(stderr, "|setextattr)\n"); 85 exit (-1); 86 } 87 } 88 89 static void 90 mkbuf(char **buf, int *oldlen, int newlen) 91 { 92 93 if (*oldlen >= newlen) 94 return; 95 if (*buf != NULL) 96 free(*buf); 97 *buf = malloc(newlen); 98 if (*buf == NULL) 99 err(1, "malloc"); 100 *oldlen = newlen; 101 return; 102 } 103 104 int 105 main(int argc, char *argv[]) 106 { 107 #define STDIN_BUF_SZ 4096 108 char stdin_data[STDIN_BUF_SZ]; 109 char *p; 110 111 const char *options, *attrname; 112 size_t len; 113 ssize_t ret; 114 int ch, error, i, arg_counter, attrnamespace, minargc; 115 116 char *visbuf = NULL; 117 int visbuflen = 0; 118 char *buf = NULL; 119 int buflen = 0; 120 struct sbuf *attrvalue = NULL; 121 int flag_force = 0; 122 int flag_nofollow = 0; 123 int flag_null = 0; 124 int count_quiet = 0; 125 int flag_from_stdin = 0; 126 int flag_string = 0; 127 int flag_hex = 0; 128 129 p = basename(argv[0]); 130 if (p == NULL) 131 p = argv[0]; 132 if (!strcmp(p, "getextattr")) { 133 what = EAGET; 134 options = "fhqsx"; 135 minargc = 3; 136 } else if (!strcmp(p, "setextattr")) { 137 what = EASET; 138 options = "fhinq"; 139 minargc = 3; 140 } else if (!strcmp(p, "rmextattr")) { 141 what = EARM; 142 options = "fhq"; 143 minargc = 3; 144 } else if (!strcmp(p, "lsextattr")) { 145 what = EALS; 146 options = "fhq"; 147 minargc = 2; 148 } else { 149 usage(); 150 } 151 152 while ((ch = getopt(argc, argv, options)) != -1) { 153 switch (ch) { 154 case 'f': 155 flag_force = 1; 156 break; 157 case 'h': 158 flag_nofollow = 1; 159 break; 160 case 'i': 161 flag_from_stdin = 1; 162 break; 163 case 'n': 164 flag_null = 1; 165 break; 166 case 'q': 167 count_quiet += 1; 168 break; 169 case 's': 170 flag_string = 1; 171 break; 172 case 'x': 173 flag_hex = 1; 174 break; 175 case '?': 176 default: 177 usage(); 178 } 179 } 180 181 argc -= optind; 182 argv += optind; 183 184 if (what == EASET && flag_from_stdin == 0) 185 minargc++; 186 187 if (argc < minargc) 188 usage(); 189 190 error = extattr_string_to_namespace(argv[0], &attrnamespace); 191 if (error) 192 err(-1, "%s", argv[0]); 193 argc--; argv++; 194 195 if (what != EALS) { 196 attrname = argv[0]; 197 argc--; argv++; 198 } else 199 attrname = NULL; 200 201 if (what == EASET) { 202 attrvalue = sbuf_new_auto(); 203 if (flag_from_stdin) { 204 while ((error = read(0, stdin_data, STDIN_BUF_SZ)) > 0) 205 sbuf_bcat(attrvalue, stdin_data, error); 206 } else { 207 sbuf_cpy(attrvalue, argv[0]); 208 argc--; argv++; 209 } 210 sbuf_finish(attrvalue); 211 } 212 213 for (arg_counter = 0; arg_counter < argc; arg_counter++) { 214 switch (what) { 215 case EARM: 216 if (flag_nofollow) 217 error = extattr_delete_link(argv[arg_counter], 218 attrnamespace, attrname); 219 else 220 error = extattr_delete_file(argv[arg_counter], 221 attrnamespace, attrname); 222 if (error >= 0) 223 continue; 224 break; 225 case EASET: 226 len = sbuf_len(attrvalue) + flag_null; 227 if (flag_nofollow) 228 ret = extattr_set_link(argv[arg_counter], 229 attrnamespace, attrname, 230 sbuf_data(attrvalue), len); 231 else 232 ret = extattr_set_file(argv[arg_counter], 233 attrnamespace, attrname, 234 sbuf_data(attrvalue), len); 235 if (ret >= 0) { 236 if ((size_t)ret != len && !count_quiet) { 237 warnx("Set %zd bytes of %zu for %s", 238 ret, len, attrname); 239 } 240 continue; 241 } 242 break; 243 case EALS: 244 if (flag_nofollow) 245 ret = extattr_list_link(argv[arg_counter], 246 attrnamespace, NULL, 0); 247 else 248 ret = extattr_list_file(argv[arg_counter], 249 attrnamespace, NULL, 0); 250 if (ret < 0) 251 break; 252 mkbuf(&buf, &buflen, ret); 253 if (flag_nofollow) 254 ret = extattr_list_link(argv[arg_counter], 255 attrnamespace, buf, buflen); 256 else 257 ret = extattr_list_file(argv[arg_counter], 258 attrnamespace, buf, buflen); 259 if (ret < 0) 260 break; 261 if (!count_quiet) 262 printf("%s\t", argv[arg_counter]); 263 for (i = 0; i < ret; i += ch + 1) { 264 /* The attribute name length is unsigned. */ 265 ch = (unsigned char)buf[i]; 266 printf("%s%*.*s", i ? "\t" : "", 267 ch, ch, buf + i + 1); 268 } 269 if (!count_quiet || ret > 0) 270 printf("\n"); 271 continue; 272 case EAGET: 273 if (flag_nofollow) 274 ret = extattr_get_link(argv[arg_counter], 275 attrnamespace, attrname, NULL, 0); 276 else 277 ret = extattr_get_file(argv[arg_counter], 278 attrnamespace, attrname, NULL, 0); 279 if (ret < 0) 280 break; 281 mkbuf(&buf, &buflen, ret); 282 if (flag_nofollow) 283 ret = extattr_get_link(argv[arg_counter], 284 attrnamespace, attrname, buf, buflen); 285 else 286 ret = extattr_get_file(argv[arg_counter], 287 attrnamespace, attrname, buf, buflen); 288 if (ret < 0) 289 break; 290 if (!count_quiet) 291 printf("%s\t", argv[arg_counter]); 292 if (flag_string) { 293 mkbuf(&visbuf, &visbuflen, ret * 4 + 1); 294 strvisx(visbuf, buf, ret, 295 VIS_SAFE | VIS_WHITE); 296 printf("\"%s\"", visbuf); 297 } else if (flag_hex) { 298 for (i = 0; i < ret; i++) 299 printf("%s%02x", i ? " " : "", 300 (unsigned char)buf[i]); 301 } else { 302 fwrite(buf, ret, 1, stdout); 303 } 304 if (count_quiet < 2) 305 printf("\n"); 306 continue; 307 default: 308 break; 309 } 310 if (!count_quiet) 311 warn("%s: failed", argv[arg_counter]); 312 if (flag_force) 313 continue; 314 return(1); 315 } 316 return (0); 317 } 318