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
36 static const char copyright[] =
37 "@(#) Copyright (c) 1983, 1993\n\
38 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
45 #include <sys/cdefs.h>
46 __FBSDID("$FreeBSD$");
51 * create the specified file, decoding as you go.
54 #include <sys/param.h>
55 #include <sys/socket.h>
58 #include <netinet/in.h>
72 static const char *infile, *outfile;
73 static FILE *infp, *outfp;
74 static int base64, cflag, iflag, oflag, pflag, rflag, sflag;
76 static void usage(void);
77 static int decode(void);
78 static int decode2(void);
79 static int uu_decode(void);
80 static int base64_decode(void);
83 main(int argc, char *argv[])
87 if (strcmp(basename(argv[0]), "b64decode") == 0)
90 while ((ch = getopt(argc, argv, "cimo:prs")) != -1) {
95 cflag = 1; /* multiple uudecode'd files */
98 iflag = 1; /* ask before override files */
104 if (cflag || pflag || rflag || sflag)
106 oflag = 1; /* output to the specified file */
107 sflag = 1; /* do not strip pathnames for output */
108 outfile = optarg; /* set the output filename */
113 pflag = 1; /* print output to stdout */
118 rflag = 1; /* decode raw data */
123 sflag = 1; /* do not strip pathnames for output */
135 infp = fopen(infile = *argv, "r");
158 /* relaxed alternative to decode2() */
159 outfile = "/dev/stdout";
162 return (base64_decode());
164 return (uu_decode());
168 warnx("%s: missing or bad \"begin\" line", infile);
171 for (r = v; cflag; r |= v) {
188 char buf[MAXPATHLEN + 1];
191 /* search for header line */
193 if (fgets(buf, sizeof(buf), infp) == NULL)
196 if (strncmp(p, "begin-base64 ", 13) == 0) {
199 } else if (strncmp(p, "begin ", 6) == 0)
203 /* p points to mode */
208 /* q points to filename */
210 while (n > 0 && (q[n-1] == '\n' || q[n-1] == '\r'))
212 /* found valid header? */
218 if (handle == NULL) {
219 warnx("%s: unable to parse file mode", infile);
222 mode = getmode(handle, 0) & 0666;
226 /* don't strip, so try ~user/file expansion */
233 pw = getpwnam(q + 1);
237 n = strlen(pw->pw_dir);
241 if (sizeof(buf) < n + m) {
242 warnx("%s: bad output filename",
246 p = memmove(buf + n, p, m);
248 q = memcpy(p - n, pw->pw_dir, n);
251 /* strip down to leaf name */
259 /* POSIX says "/dev/stdout" is a 'magic cookie' not a special file. */
260 if (pflag || strcmp(outfile, "/dev/stdout") == 0)
263 flags = O_WRONLY | O_CREAT | O_EXCL;
264 if (lstat(outfile, &st) == 0) {
266 warnc(EEXIST, "%s: %s", infile, outfile);
269 switch (st.st_mode & S_IFMT) {
272 /* avoid symlink attacks */
273 if (unlink(outfile) == 0 || errno == ENOENT)
275 warn("%s: unlink %s", infile, outfile);
278 warnc(EISDIR, "%s: %s", infile, outfile);
282 /* trust command-line names */
286 warnc(EEXIST, "%s: %s", infile, outfile);
289 } else if (errno != ENOENT) {
290 warn("%s: %s", infile, outfile);
293 if ((fd = open(outfile, flags, mode)) < 0 ||
294 (outfp = fdopen(fd, "w")) == NULL) {
295 warn("%s: %s", infile, outfile);
301 return (base64_decode());
303 return (uu_decode());
307 getline(char *buf, size_t size)
310 if (fgets(buf, size, infp) != NULL)
314 warnx("%s: %s: short file", infile, outfile);
319 checkend(const char *ptr, const char *end, const char *msg)
324 if (strncmp(ptr, end, n) != 0 ||
325 strspn(ptr + n, " \t\r\n") != strlen(ptr + n)) {
326 warnx("%s: %s: %s", infile, outfile, msg);
329 if (fclose(outfp) != 0) {
330 warn("%s: %s", infile, outfile);
341 char buf[MAXPATHLEN+1];
343 /* for each input line */
345 switch (getline(buf, sizeof(buf))) {
352 #define DEC(c) (((c) - ' ') & 077) /* single character decode */
353 #define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )
355 #define OUT_OF_RANGE do { \
356 warnx("%s: %s: character out of range: [%d-%d]", \
357 infile, outfile, 1 + ' ', 077 + ' ' + 1); \
362 * `i' is used to avoid writing out all the characters
363 * at the end of the file.
366 if ((i = DEC(*p)) <= 0)
368 for (++p; i > 0; p += 4, i -= 3)
370 if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) &&
371 IS_DEC(*(p + 2)) && IS_DEC(*(p + 3))))
374 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
376 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
378 ch = DEC(p[2]) << 6 | DEC(p[3]);
382 if (!(IS_DEC(*p) && IS_DEC(*(p + 1))))
384 ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
388 if (!(IS_DEC(*(p + 1)) &&
392 ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
396 if (!(IS_DEC(*(p + 2)) &&
399 ch = DEC(p[2]) << 6 | DEC(p[3]);
404 switch (getline(buf, sizeof(buf))) {
410 return (checkend(buf, "end", "no \"end\" line"));
417 int n, count, count4;
418 char inbuf[MAXPATHLEN + 1], *p;
419 unsigned char outbuf[MAXPATHLEN * 4];
420 char leftover[MAXPATHLEN + 1];
424 strcpy(inbuf, leftover);
425 switch (getline(inbuf + strlen(inbuf),
426 sizeof(inbuf) - strlen(inbuf))) {
438 * Base64 encoded strings have the following
439 * characters in them: A-Z, a-z, 0-9 and +, / and =
441 if (isalnum(*p) || *p == '+' || *p == '/' || *p == '=')
448 strcpy(leftover, inbuf + count4 + 1);
449 inbuf[count4 + 1] = 0;
451 n = b64_pton(inbuf, outbuf, sizeof(outbuf));
455 fwrite(outbuf, 1, n, outfp);
457 return (checkend(inbuf, "====", "error decoding base64 input stream"));
464 (void)fprintf(stderr,
465 "usage: uudecode [-cimprs] [file ...]\n"
466 " uudecode [-i] -o output_file [file]\n"
467 " b64decode [-cimprs] [file ...]\n"
468 " b64decode [-i] -o output_file [file]\n");