1 /* uudecode.c -- uudecode utility.
2 * Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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)
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.
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
19 * Reworked to GNU style by Ian Lance Taylor, ian@airs.com, August 93.
21 * Original copyright notice is retained at the end of this file.
31 /*struct passwd *getpwnam();*/
33 /* Single character decode. */
34 #define DEC(Char) (((Char) - ' ') & 077)
36 static int read_stduu (const char *inname)
44 if (fgets (buf, sizeof(buf), stdin) == NULL) {
45 error_msg("%s: Short file\n", inname);
50 /* N is used to avoid writing out all the characters at the end of
55 for (++p; n > 0; p += 4, n -= 3) {
59 ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
61 ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
63 ch = DEC (p[2]) << 6 | DEC (p[3]);
67 ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
71 ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
78 if (fgets (buf, sizeof(buf), stdin) == NULL
79 || strcmp (buf, "end\n")) {
80 error_msg("%s: No `end' line\n", inname);
87 static int read_base64 (const char *inname)
89 static const char b64_tab[256] = {
90 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*000-007*/
91 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*010-017*/
92 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*020-027*/
93 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*030-037*/
94 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*040-047*/
95 '\177', '\177', '\177', '\76', '\177', '\177', '\177', '\77', /*050-057*/
96 '\64', '\65', '\66', '\67', '\70', '\71', '\72', '\73', /*060-067*/
97 '\74', '\75', '\177', '\177', '\177', '\100', '\177', '\177', /*070-077*/
98 '\177', '\0', '\1', '\2', '\3', '\4', '\5', '\6', /*100-107*/
99 '\7', '\10', '\11', '\12', '\13', '\14', '\15', '\16', /*110-117*/
100 '\17', '\20', '\21', '\22', '\23', '\24', '\25', '\26', /*120-127*/
101 '\27', '\30', '\31', '\177', '\177', '\177', '\177', '\177', /*130-137*/
102 '\177', '\32', '\33', '\34', '\35', '\36', '\37', '\40', /*140-147*/
103 '\41', '\42', '\43', '\44', '\45', '\46', '\47', '\50', /*150-157*/
104 '\51', '\52', '\53', '\54', '\55', '\56', '\57', '\60', /*160-167*/
105 '\61', '\62', '\63', '\177', '\177', '\177', '\177', '\177', /*170-177*/
106 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*200-207*/
107 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*210-217*/
108 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*220-227*/
109 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*230-237*/
110 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*240-247*/
111 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*250-257*/
112 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*260-267*/
113 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*270-277*/
114 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*300-307*/
115 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*310-317*/
116 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*320-327*/
117 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*330-337*/
118 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*340-347*/
119 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*350-357*/
120 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*360-367*/
121 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*370-377*/
123 unsigned char buf[2 * BUFSIZ];
129 if (fgets (buf, sizeof(buf), stdin) == NULL) {
130 error_msg("%s: Short file\n", inname);
135 if (memcmp (buf, "====", 4) == 0)
137 if (last_data != 0) {
138 error_msg("%s: data following `=' padding character\n", inname);
142 /* The following implementation of the base64 decoding might look
143 a bit clumsy but I only try to follow the POSIX standard:
144 ``All line breaks or other characters not found in the table
145 [with base64 characters] shall be ignored by decoding
150 while ((b64_tab[*p] & '\100') != 0)
151 if (*p == '\n' || *p++ == '=')
154 /* This leaves the loop. */
158 while ((b64_tab[*p] & '\100') != 0)
159 if (*p == '\n' || *p++ == '=') {
160 error_msg("%s: illegal line\n", inname);
165 while (b64_tab[*p] == '\177')
167 error_msg("%s: illegal line\n", inname);
171 putchar (c1 << 2 | c2 >> 4);
177 while (b64_tab[*p] == '\177')
179 error_msg("%s: illegal line\n", inname);
182 putchar (c1 << 2 | c2 >> 4);
183 putchar (c2 << 4 | c3 >> 2);
189 putchar (c3 << 6 | b64_tab[*p++]);
196 static int decode (const char *inname,
197 const char *forced_outname)
203 char buf[2 * BUFSIZ];
207 /* Search for header line. */
210 if (fgets (buf, sizeof (buf), stdin) == NULL) {
211 error_msg("%s: No `begin' line\n", inname);
215 if (strncmp (buf, "begin", 5) == 0) {
216 if (sscanf (buf, "begin-base64 %o %s", &mode, buf) == 2) {
219 } else if (sscanf (buf, "begin %o %s", &mode, buf) == 2)
224 /* If the output file name is given on the command line this rules. */
225 if (forced_outname != NULL)
226 outname = (char *) forced_outname;
228 /* Handle ~user/file format. */
236 error_msg("%s: Illegal ~user\n", inname);
240 pw = getpwnam (buf + 1);
242 error_msg("%s: No user `%s'\n", inname, buf + 1);
245 n = strlen (pw->pw_dir);
247 outname = (char *) alloca ((size_t) (n + n1 + 2));
248 memcpy (outname + n + 1, p, (size_t) (n1 + 1));
249 memcpy (outname, pw->pw_dir, (size_t) n);
254 /* Create output file and set mode. */
255 if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0
256 && (freopen (outname, "w", stdout) == NULL
257 || chmod (outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO))
259 perror_msg("%s", outname); /* */
263 /* We differenciate decoding standard UU encoding and base64. A
264 common function would only slow down the program. */
266 /* For each input line: */
268 return read_base64 (inname);
270 return read_stduu (inname);
273 int uudecode_main (int argc,
281 while ((opt = getopt(argc, argv, "o:")) != EOF) {
291 usage(uudecode_usage);
296 exit_status = decode ("stdin", outname) == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
298 exit_status = EXIT_SUCCESS;
300 if (freopen (argv[optind], "r", stdin) != NULL) {
301 if (decode (argv[optind], outname) != 0)
304 perror_msg("%s", argv[optind]);
305 exit_status = EXIT_FAILURE;
309 while (optind < argc);
314 /* Copyright (c) 1983 Regents of the University of California.
315 * All rights reserved.
317 * Redistribution and use in source and binary forms, with or without
318 * modification, are permitted provided that the following conditions
320 * 1. Redistributions of source code must retain the above copyright
321 * notice, this list of conditions and the following disclaimer.
322 * 2. Redistributions in binary form must reproduce the above copyright
323 * notice, this list of conditions and the following disclaimer in the
324 * documentation and/or other materials provided with the distribution.
326 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
327 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
329 * 4. Neither the name of the University nor the names of its contributors
330 * may be used to endorse or promote products derived from this software
331 * without specific prior written permission.
333 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
334 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
335 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
336 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
337 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
338 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
339 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
340 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
341 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
342 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF