2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)uudecode.c 8.2 (Berkeley) 4/2/94
35 * $FreeBSD: src/usr.bin/uudecode/uudecode.c,v 1.13.2.6 2003/04/07 20:10:33 fanf Exp $
36 * $DragonFly: src/usr.bin/uudecode/uudecode.c,v 1.3 2004/12/22 11:25:51 liamfoy Exp $
42 * create the specified file, decoding as you go.
45 #include <sys/param.h>
46 #include <sys/socket.h>
49 #include <netinet/in.h>
62 static const char *infile, *outfile;
63 static FILE *infp, *outfp;
64 static int base64, cflag, iflag, oflag, pflag, rflag, sflag;
66 static void usage(void);
67 static int decode(void);
68 static int decode2(void);
69 static int uu_decode(void);
70 static int base64_decode(void);
73 main(int argc, char *argv[])
77 if (strcmp(basename(argv[0]), "b64decode") == 0)
80 while ((ch = getopt(argc, argv, "cimo:prs")) != -1) {
85 cflag = 1; /* multiple uudecode'd files */
88 iflag = 1; /* ask before override files */
94 if (cflag || pflag || rflag || sflag)
96 oflag = 1; /* output to the specified file */
97 sflag = 1; /* do not strip pathnames for output */
98 outfile = optarg; /* set the output filename */
103 pflag = 1; /* print output to stdout */
108 rflag = 1; /* decode raw data */
113 sflag = 1; /* do not strip pathnames for output */
125 infp = fopen(infile = *argv, "r");
148 /* relaxed alternative to decode2() */
149 outfile = "/dev/stdout";
152 return (base64_decode());
154 return (uu_decode());
158 warnx("%s: missing or bad \"begin\" line", infile);
161 for (r = v; cflag; r |= v) {
179 char buf[MAXPATHLEN+1];
182 /* search for header line */
184 if (fgets(buf, sizeof(buf), infp) == NULL)
187 if (strncmp(p, "begin-base64 ", 13) == 0) {
190 } else if (strncmp(p, "begin ", 6) == 0)
194 /* p points to mode */
199 /* q points to filename */
201 while (n > 0 && (q[n-1] == '\n' || q[n-1] == '\r'))
203 /* found valid header? */
209 if ((handle = setmode(p)) == NULL) {
211 warnx("invalid file mode: %s", infile);
213 warn("setmode malloc failed: %s", infile);
218 mode = getmode(handle, 0) & 0666;
222 /* don't strip, so try ~user/file expansion */
229 pw = getpwnam(q + 1);
233 n = strlen(pw->pw_dir);
237 if (sizeof(buf) < n + m) {
238 warnx("%s: bad output filename",
242 p = memmove(buf + n, p, m);
244 q = memcpy(p - n, pw->pw_dir, n);
247 /* strip down to leaf name */
255 /* POSIX says "/dev/stdout" is a 'magic cookie' not a special file. */
256 if (pflag || strcmp(outfile, "/dev/stdout") == 0)
259 flags = O_WRONLY|O_CREAT|O_EXCL;
260 if (lstat(outfile, &st) == 0) {
262 warnc(EEXIST, "%s: %s", infile, outfile);
265 switch (st.st_mode & S_IFMT) {
268 /* avoid symlink attacks */
269 if (unlink(outfile) == 0 || errno == ENOENT)
271 warn("%s: unlink %s", infile, outfile);
274 warnc(EISDIR, "%s: %s", infile, outfile);
278 /* trust command-line names */
282 warnc(EEXIST, "%s: %s", infile, outfile);
285 } else if (errno != ENOENT) {
286 warn("%s: %s", infile, outfile);
289 if ((fd = open(outfile, flags, mode)) < 0 ||
290 (outfp = fdopen(fd, "w")) == NULL) {
291 warn("%s: %s", infile, outfile);
297 return (base64_decode());
299 return (uu_decode());
303 getline(char *buf, size_t size)
305 if (fgets(buf, size, infp) != NULL)
309 warnx("%s: %s: short file", infile, outfile);
314 checkend(const char *ptr, const char *end, const char *msg)
319 if (strncmp(ptr, end, n) != 0 ||
320 strspn(ptr + n, " \t\r\n") != strlen(ptr + n)) {
321 warnx("%s: %s: %s", infile, outfile, msg);
324 if (fclose(outfp) != 0) {
325 warn("%s: %s", infile, outfile);
336 char buf[MAXPATHLEN+1];
338 /* for each input line */
340 switch (getline(buf, sizeof(buf))) {
345 #define DEC(c) (((c) - ' ') & 077) /* single character decode */
346 #define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )
348 #define OUT_OF_RANGE do { \
349 warnx("%s: %s: character out of range: [%d-%d]", \
350 infile, outfile, 1 + ' ', 077 + ' ' + 1); \
355 * `i' is used to avoid writing out all the characters
356 * at the end of the file.
359 if ((i = DEC(*p)) <= 0)
361 for (++p; i > 0; p += 4, i -= 3)
363 if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) &&
364 IS_DEC(*(p + 2)) && IS_DEC(*(p + 3))))
367 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
369 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
371 ch = DEC(p[2]) << 6 | DEC(p[3]);
376 if (!(IS_DEC(*p) && IS_DEC(*(p + 1))))
378 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
382 if (!(IS_DEC(*(p + 1)) &&
386 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
390 if (!(IS_DEC(*(p + 2)) &&
393 ch = DEC(p[2]) << 6 | DEC(p[3]);
398 switch (getline(buf, sizeof(buf))) {
401 default: return (checkend(buf, "end", "no \"end\" line"));
409 char inbuf[MAXPATHLEN+1];
410 unsigned char outbuf[MAXPATHLEN * 4];
413 switch (getline(inbuf, sizeof(inbuf))) {
417 n = b64_pton(inbuf, outbuf, sizeof(outbuf));
420 fwrite(outbuf, 1, n, outfp);
422 return (checkend(inbuf, "====",
423 "error decoding base64 input stream"));
429 (void)fprintf(stderr,
430 "usage: uudecode [-cimprs] [file ...]\n"
431 " uudecode [-i] -o output_file [file]\n"
432 " b64decode [-cimprs] [file ...]\n"
433 " b64decode [-i] -o output_file [file]\n");