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.
32 /*struct passwd *getpwnam();*/
34 /* Single character decode. */
35 #define DEC(Char) (((Char) - ' ') & 077)
37 static int read_stduu (const char *inname)
45 if (fgets (buf, sizeof(buf), stdin) == NULL) {
46 error_msg("%s: Short file\n", inname);
51 /* N is used to avoid writing out all the characters at the end of
56 for (++p; n > 0; p += 4, n -= 3) {
60 ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
62 ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
64 ch = DEC (p[2]) << 6 | DEC (p[3]);
68 ch = DEC (p[0]) << 2 | DEC (p[1]) >> 4;
72 ch = DEC (p[1]) << 4 | DEC (p[2]) >> 2;
79 if (fgets (buf, sizeof(buf), stdin) == NULL
80 || strcmp (buf, "end\n")) {
81 error_msg("%s: No `end' line\n", inname);
88 static int read_base64 (const char *inname)
90 static const char b64_tab[256] = {
91 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*000-007*/
92 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*010-017*/
93 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*020-027*/
94 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*030-037*/
95 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*040-047*/
96 '\177', '\177', '\177', '\76', '\177', '\177', '\177', '\77', /*050-057*/
97 '\64', '\65', '\66', '\67', '\70', '\71', '\72', '\73', /*060-067*/
98 '\74', '\75', '\177', '\177', '\177', '\100', '\177', '\177', /*070-077*/
99 '\177', '\0', '\1', '\2', '\3', '\4', '\5', '\6', /*100-107*/
100 '\7', '\10', '\11', '\12', '\13', '\14', '\15', '\16', /*110-117*/
101 '\17', '\20', '\21', '\22', '\23', '\24', '\25', '\26', /*120-127*/
102 '\27', '\30', '\31', '\177', '\177', '\177', '\177', '\177', /*130-137*/
103 '\177', '\32', '\33', '\34', '\35', '\36', '\37', '\40', /*140-147*/
104 '\41', '\42', '\43', '\44', '\45', '\46', '\47', '\50', /*150-157*/
105 '\51', '\52', '\53', '\54', '\55', '\56', '\57', '\60', /*160-167*/
106 '\61', '\62', '\63', '\177', '\177', '\177', '\177', '\177', /*170-177*/
107 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*200-207*/
108 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*210-217*/
109 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*220-227*/
110 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*230-237*/
111 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*240-247*/
112 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*250-257*/
113 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*260-267*/
114 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*270-277*/
115 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*300-307*/
116 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*310-317*/
117 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*320-327*/
118 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*330-337*/
119 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*340-347*/
120 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*350-357*/
121 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*360-367*/
122 '\177', '\177', '\177', '\177', '\177', '\177', '\177', '\177', /*370-377*/
124 unsigned char buf[2 * BUFSIZ];
130 if (fgets (buf, sizeof(buf), stdin) == NULL) {
131 error_msg("%s: Short file\n", inname);
136 if (memcmp (buf, "====", 4) == 0)
138 if (last_data != 0) {
139 error_msg("%s: data following `=' padding character\n", inname);
143 /* The following implementation of the base64 decoding might look
144 a bit clumsy but I only try to follow the POSIX standard:
145 ``All line breaks or other characters not found in the table
146 [with base64 characters] shall be ignored by decoding
151 while ((b64_tab[*p] & '\100') != 0)
152 if (*p == '\n' || *p++ == '=')
155 /* This leaves the loop. */
159 while ((b64_tab[*p] & '\100') != 0)
160 if (*p == '\n' || *p++ == '=') {
161 error_msg("%s: illegal line\n", inname);
166 while (b64_tab[*p] == '\177')
168 error_msg("%s: illegal line\n", inname);
172 putchar (c1 << 2 | c2 >> 4);
178 while (b64_tab[*p] == '\177')
180 error_msg("%s: illegal line\n", inname);
183 putchar (c1 << 2 | c2 >> 4);
184 putchar (c2 << 4 | c3 >> 2);
190 putchar (c3 << 6 | b64_tab[*p++]);
197 static int decode (const char *inname,
198 const char *forced_outname)
204 char buf[2 * BUFSIZ];
208 /* Search for header line. */
211 if (fgets (buf, sizeof (buf), stdin) == NULL) {
212 error_msg("%s: No `begin' line\n", inname);
216 if (strncmp (buf, "begin", 5) == 0) {
217 if (sscanf (buf, "begin-base64 %o %s", &mode, buf) == 2) {
220 } else if (sscanf (buf, "begin %o %s", &mode, buf) == 2)
225 /* If the output file name is given on the command line this rules. */
226 if (forced_outname != NULL)
227 outname = (char *) forced_outname;
229 /* Handle ~user/file format. */
237 error_msg("%s: Illegal ~user\n", inname);
241 pw = getpwnam (buf + 1);
243 error_msg("%s: No user `%s'\n", inname, buf + 1);
246 n = strlen (pw->pw_dir);
248 outname = (char *) alloca ((size_t) (n + n1 + 2));
249 memcpy (outname + n + 1, p, (size_t) (n1 + 1));
250 memcpy (outname, pw->pw_dir, (size_t) n);
255 /* Create output file and set mode. */
256 if (strcmp (outname, "/dev/stdout") != 0 && strcmp (outname, "-") != 0
257 && (freopen (outname, "w", stdout) == NULL
258 || chmod (outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO))
260 error_msg("%s: %s %s\n", outname, inname, strerror(errno)); /* */
264 /* We differenciate decoding standard UU encoding and base64. A
265 common function would only slow down the program. */
267 /* For each input line: */
269 return read_base64 (inname);
271 return read_stduu (inname);
274 int uudecode_main (int argc,
282 while ((opt = getopt(argc, argv, "o:")) != EOF) {
292 usage(uudecode_usage);
297 exit_status = decode ("stdin", outname) == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
299 exit_status = EXIT_SUCCESS;
301 if (freopen (argv[optind], "r", stdin) != NULL) {
302 if (decode (argv[optind], outname) != 0)
305 error_msg("%s: %s\n", argv[optind], strerror(errno));
306 exit_status = EXIT_FAILURE;
310 while (optind < argc);
315 /* Copyright (c) 1983 Regents of the University of California.
316 * All rights reserved.
318 * Redistribution and use in source and binary forms, with or without
319 * modification, are permitted provided that the following conditions
321 * 1. Redistributions of source code must retain the above copyright
322 * notice, this list of conditions and the following disclaimer.
323 * 2. Redistributions in binary form must reproduce the above copyright
324 * notice, this list of conditions and the following disclaimer in the
325 * documentation and/or other materials provided with the distribution.
327 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
328 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
330 * 4. Neither the name of the University nor the names of its contributors
331 * may be used to endorse or promote products derived from this software
332 * without specific prior written permission.
334 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
335 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
336 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
337 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
338 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
339 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
340 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
341 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
342 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
343 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF