Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 1 | /* uudecode.c -- uudecode utility. |
| 2 | * Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
| 3 | * |
| 4 | * This product is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2, or (at your option) |
| 7 | * any later version. |
| 8 | * |
| 9 | * This product is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this product; see the file COPYING. If not, write to |
| 16 | * the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 17 | * 02111-1307, USA. |
Eric Andersen | 4e573f4 | 2000-11-14 23:29:24 +0000 | [diff] [blame] | 18 | * |
| 19 | * Reworked to GNU style by Ian Lance Taylor, ian@airs.com, August 93. |
| 20 | * |
| 21 | * Original copyright notice is retained at the end of this file. |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 22 | */ |
| 23 | |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 24 | |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <errno.h> |
Eric Andersen | 999bf72 | 2000-07-09 06:59:58 +0000 | [diff] [blame] | 28 | #include <getopt.h> |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 29 | #include <string.h> |
| 30 | #include <stdlib.h> |
Eric Andersen | cbe31da | 2001-02-20 06:14:08 +0000 | [diff] [blame] | 31 | #include "busybox.h" |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 32 | #include "pwd_grp/pwd.h" |
| 33 | #include "pwd_grp/grp.h" |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 34 | |
| 35 | /*struct passwd *getpwnam();*/ |
| 36 | |
| 37 | /* Single character decode. */ |
| 38 | #define DEC(Char) (((Char) - ' ') & 077) |
| 39 | |
| 40 | static int read_stduu (const char *inname) |
| 41 | { |
| 42 | char buf[2 * BUFSIZ]; |
| 43 | |
| 44 | while (1) { |
| 45 | int n; |
| 46 | char *p; |
| 47 | |
| 48 | if (fgets (buf, sizeof(buf), stdin) == NULL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 49 | error_msg("%s: Short file", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 50 | return FALSE; |
| 51 | } |
| 52 | p = buf; |
| 53 | |
| 54 | /* N is used to avoid writing out all the characters at the end of |
| 55 | the file. */ |
| 56 | n = DEC (*p); |
| 57 | if (n <= 0) |
| 58 | break; |
| 59 | for (++p; n > 0; p += 4, n -= 3) { |
| 60 | char ch; |
| 61 | |
| 62 | if (n >= 3) { |
| 63 | ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4; |
| 64 | putchar (ch); |
| 65 | ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2; |
| 66 | putchar (ch); |
| 67 | ch = DEC (p[2]) << 6 | DEC (p[3]); |
| 68 | putchar (ch); |
| 69 | } else { |
| 70 | if (n >= 1) { |
| 71 | ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4; |
| 72 | putchar (ch); |
| 73 | } |
| 74 | if (n >= 2) { |
| 75 | ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2; |
| 76 | putchar (ch); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | if (fgets (buf, sizeof(buf), stdin) == NULL |
| 83 | || strcmp (buf, "end\n")) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 84 | error_msg("%s: No `end' line", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 85 | return FALSE; |
| 86 | } |
| 87 | |
| 88 | return TRUE; |
| 89 | } |
| 90 | |
| 91 | static int read_base64 (const char *inname) |
| 92 | { |
| 93 | static const char b64_tab[256] = { |
| 94 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*000-007*/ |
| 95 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*010-017*/ |
| 96 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*020-027*/ |
| 97 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*030-037*/ |
| 98 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*040-047*/ |
| 99 | '\177', '\177', '\177', '\76', '\177', '\177', '\177', '\77', /*050-057*/ |
| 100 | '\64', '\65', '\66', '\67', '\70', '\71', '\72', '\73', /*060-067*/ |
| 101 | '\74', '\75', '\177', '\177', '\177', '\100', '\177', '\177', /*070-077*/ |
| 102 | '\177', '\0', '\1', '\2', '\3', '\4', '\5', '\6', /*100-107*/ |
| 103 | '\7', '\10', '\11', '\12', '\13', '\14', '\15', '\16', /*110-117*/ |
| 104 | '\17', '\20', '\21', '\22', '\23', '\24', '\25', '\26', /*120-127*/ |
| 105 | '\27', '\30', '\31', '\177', '\177', '\177', '\177', '\177', /*130-137*/ |
| 106 | '\177', '\32', '\33', '\34', '\35', '\36', '\37', '\40', /*140-147*/ |
| 107 | '\41', '\42', '\43', '\44', '\45', '\46', '\47', '\50', /*150-157*/ |
| 108 | '\51', '\52', '\53', '\54', '\55', '\56', '\57', '\60', /*160-167*/ |
| 109 | '\61', '\62', '\63', '\177', '\177', '\177', '\177', '\177', /*170-177*/ |
| 110 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*200-207*/ |
| 111 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*210-217*/ |
| 112 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*220-227*/ |
| 113 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*230-237*/ |
| 114 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*240-247*/ |
| 115 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*250-257*/ |
| 116 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*260-267*/ |
| 117 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*270-277*/ |
| 118 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*300-307*/ |
| 119 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*310-317*/ |
| 120 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*320-327*/ |
| 121 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*330-337*/ |
| 122 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*340-347*/ |
| 123 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*350-357*/ |
| 124 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*360-367*/ |
| 125 | '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*370-377*/ |
| 126 | }; |
| 127 | unsigned char buf[2 * BUFSIZ]; |
| 128 | |
| 129 | while (1) { |
| 130 | int last_data = 0; |
| 131 | unsigned char *p; |
| 132 | |
| 133 | if (fgets (buf, sizeof(buf), stdin) == NULL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 134 | error_msg("%s: Short file", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 135 | return FALSE; |
| 136 | } |
| 137 | p = buf; |
| 138 | |
| 139 | if (memcmp (buf, "====", 4) == 0) |
| 140 | break; |
| 141 | if (last_data != 0) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 142 | error_msg("%s: data following `=' padding character", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 143 | return FALSE; |
| 144 | } |
| 145 | |
| 146 | /* The following implementation of the base64 decoding might look |
| 147 | a bit clumsy but I only try to follow the POSIX standard: |
| 148 | ``All line breaks or other characters not found in the table |
| 149 | [with base64 characters] shall be ignored by decoding |
| 150 | software.'' */ |
| 151 | while (*p != '\n') { |
| 152 | char c1, c2, c3; |
| 153 | |
| 154 | while ((b64_tab[*p] & '\100') != 0) |
| 155 | if (*p == '\n' || *p++ == '=') |
| 156 | break; |
| 157 | if (*p == '\n') |
| 158 | /* This leaves the loop. */ |
| 159 | continue; |
| 160 | c1 = b64_tab[*p++]; |
| 161 | |
| 162 | while ((b64_tab[*p] & '\100') != 0) |
| 163 | if (*p == '\n' || *p++ == '=') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 164 | error_msg("%s: illegal line", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 165 | return FALSE; |
| 166 | } |
| 167 | c2 = b64_tab[*p++]; |
| 168 | |
| 169 | while (b64_tab[*p] == '\177') |
| 170 | if (*p++ == '\n') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 171 | error_msg("%s: illegal line", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 172 | return FALSE; |
| 173 | } |
| 174 | if (*p == '=') { |
| 175 | putchar (c1 << 2 | c2 >> 4); |
| 176 | last_data = 1; |
| 177 | break; |
| 178 | } |
| 179 | c3 = b64_tab[*p++]; |
| 180 | |
| 181 | while (b64_tab[*p] == '\177') |
| 182 | if (*p++ == '\n') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 183 | error_msg("%s: illegal line", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 184 | return FALSE; |
| 185 | } |
| 186 | putchar (c1 << 2 | c2 >> 4); |
| 187 | putchar (c2 << 4 | c3 >> 2); |
| 188 | if (*p == '=') { |
| 189 | last_data = 1; |
| 190 | break; |
| 191 | } |
| 192 | else |
| 193 | putchar (c3 << 6 | b64_tab[*p++]); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | return TRUE; |
| 198 | } |
| 199 | |
| 200 | static int decode (const char *inname, |
| 201 | const char *forced_outname) |
| 202 | { |
| 203 | struct passwd *pw; |
| 204 | register int n; |
| 205 | register char *p; |
| 206 | int mode, n1; |
| 207 | char buf[2 * BUFSIZ]; |
| 208 | char *outname; |
| 209 | int do_base64 = 0; |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 210 | int res; |
| 211 | int dofre; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 212 | |
| 213 | /* Search for header line. */ |
| 214 | |
| 215 | while (1) { |
| 216 | if (fgets (buf, sizeof (buf), stdin) == NULL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 217 | error_msg("%s: No `begin' line", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 218 | return FALSE; |
| 219 | } |
| 220 | |
| 221 | if (strncmp (buf, "begin", 5) == 0) { |
| 222 | if (sscanf (buf, "begin-base64 %o %s", &mode, buf) == 2) { |
| 223 | do_base64 = 1; |
| 224 | break; |
| 225 | } else if (sscanf (buf, "begin %o %s", &mode, buf) == 2) |
| 226 | break; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /* If the output file name is given on the command line this rules. */ |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 231 | dofre = FALSE; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 232 | if (forced_outname != NULL) |
| 233 | outname = (char *) forced_outname; |
| 234 | else { |
| 235 | /* Handle ~user/file format. */ |
| 236 | if (buf[0] != '~') |
| 237 | outname = buf; |
| 238 | else { |
| 239 | p = buf + 1; |
| 240 | while (*p != '/') |
| 241 | ++p; |
| 242 | if (*p == '\0') { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 243 | error_msg("%s: Illegal ~user", inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 244 | return FALSE; |
| 245 | } |
| 246 | *p++ = '\0'; |
| 247 | pw = getpwnam (buf + 1); |
| 248 | if (pw == NULL) { |
Matt Kraai | dd19c69 | 2001-01-31 19:00:21 +0000 | [diff] [blame] | 249 | error_msg("%s: No user `%s'", inname, buf + 1); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 250 | return FALSE; |
| 251 | } |
| 252 | n = strlen (pw->pw_dir); |
| 253 | n1 = strlen (p); |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 254 | outname = (char *) xmalloc ((size_t) (n + n1 + 2)); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 255 | memcpy (outname + n + 1, p, (size_t) (n1 + 1)); |
| 256 | memcpy (outname, pw->pw_dir, (size_t) n); |
| 257 | outname[n] = '/'; |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 258 | dofre = TRUE; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 259 | } |
| 260 | } |
| 261 | |
| 262 | /* Create output file and set mode. */ |
| 263 | if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0 |
| 264 | && (freopen (outname, "w", stdout) == NULL |
| 265 | || chmod (outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO)) |
| 266 | )) { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 267 | perror_msg("%s", outname); /* */ |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 268 | if (dofre) |
| 269 | free(outname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 270 | return FALSE; |
| 271 | } |
| 272 | |
| 273 | /* We differenciate decoding standard UU encoding and base64. A |
| 274 | common function would only slow down the program. */ |
| 275 | |
| 276 | /* For each input line: */ |
| 277 | if (do_base64) |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 278 | res = read_base64 (inname); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 279 | else |
Eric Andersen | 20aab26 | 2001-07-19 22:28:02 +0000 | [diff] [blame^] | 280 | res = read_stduu (inname); |
| 281 | if (dofre) |
| 282 | free(outname); |
| 283 | return res; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 284 | } |
| 285 | |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 286 | int uudecode_main (int argc, |
| 287 | char **argv) |
| 288 | { |
| 289 | int opt; |
| 290 | int exit_status; |
| 291 | const char *outname; |
| 292 | outname = NULL; |
| 293 | |
| 294 | while ((opt = getopt(argc, argv, "o:")) != EOF) { |
| 295 | switch (opt) { |
| 296 | case 0: |
| 297 | break; |
| 298 | |
| 299 | case 'o': |
| 300 | outname = optarg; |
| 301 | break; |
| 302 | |
| 303 | default: |
Eric Andersen | 67991cf | 2001-02-14 21:23:06 +0000 | [diff] [blame] | 304 | show_usage(); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 305 | } |
| 306 | } |
| 307 | |
| 308 | if (optind == argc) |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 309 | exit_status = decode ("stdin", outname) == 0 ? EXIT_SUCCESS : EXIT_FAILURE; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 310 | else { |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 311 | exit_status = EXIT_SUCCESS; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 312 | do { |
| 313 | if (freopen (argv[optind], "r", stdin) != NULL) { |
| 314 | if (decode (argv[optind], outname) != 0) |
| 315 | exit_status = FALSE; |
| 316 | } else { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 317 | perror_msg("%s", argv[optind]); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 318 | exit_status = EXIT_FAILURE; |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 319 | } |
| 320 | optind++; |
| 321 | } |
| 322 | while (optind < argc); |
| 323 | } |
Eric Andersen | b610615 | 2000-06-19 17:25:40 +0000 | [diff] [blame] | 324 | return(exit_status); |
Eric Andersen | 2b6ab3c | 2000-06-13 06:54:53 +0000 | [diff] [blame] | 325 | } |
Eric Andersen | 4e573f4 | 2000-11-14 23:29:24 +0000 | [diff] [blame] | 326 | |
| 327 | /* Copyright (c) 1983 Regents of the University of California. |
| 328 | * All rights reserved. |
| 329 | * |
| 330 | * Redistribution and use in source and binary forms, with or without |
| 331 | * modification, are permitted provided that the following conditions |
| 332 | * are met: |
| 333 | * 1. Redistributions of source code must retain the above copyright |
| 334 | * notice, this list of conditions and the following disclaimer. |
| 335 | * 2. Redistributions in binary form must reproduce the above copyright |
| 336 | * notice, this list of conditions and the following disclaimer in the |
| 337 | * documentation and/or other materials provided with the distribution. |
| 338 | * |
| 339 | * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change |
| 340 | * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> |
| 341 | * |
| 342 | * 4. Neither the name of the University nor the names of its contributors |
| 343 | * may be used to endorse or promote products derived from this software |
| 344 | * without specific prior written permission. |
| 345 | * |
| 346 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 347 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 348 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 349 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 350 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 351 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 352 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 353 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 354 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 355 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 356 | * SUCH DAMAGE. |
| 357 | */ |
| 358 | |
| 359 | |