/*-
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
/*
* uudecode [file ...]
*
* create the specified file, decoding as you go.
* used with uuencode.
*/
#include <sys/param.h>
#include <sys/stat.h>
#include <err.h>
#include <fnmatch.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *filename;
int cflag, iflag, pflag, sflag;
static void usage __P((void));
int decode __P((void));
int decode2 __P((int));
int
main(argc, argv)
int argc;
char *argv[];
{
int rval, ch;
while ((ch = getopt(argc, argv, "cips")) != -1) {
switch(ch) {
case 'c':
cflag = 1; /* multiple uudecode'd files */
break;
case 'i':
iflag = 1; /* ask before override files */
break;
case 'p':
pflag = 1; /* print output to stdout */
break;
case 's':
sflag = 1; /* do not strip pathnames for output */
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (*argv) {
rval = 0;
do {
if (!freopen(filename = *argv, "r", stdin)) {
warn("%s", *argv);
rval = 1;
continue;
}
rval |= decode();
} while (*++argv);
} else {
filename = "stdin";
rval = decode();
}
exit(rval);
}
int
decode ()
{
int flag;
/* decode only one file per input stream */
if (!cflag)
return(decode2(0));
/* multiple uudecode'd files */
for (flag = 0; ; flag++)
if (decode2(flag))
return(1);
else if (feof(stdin))
break;
return(0);
}
int
decode2(flag)
int flag;
{
struct passwd *pw;
register int n;
register char ch, *p;
int ignore, mode, n1;
char buf[MAXPATHLEN];
char buffn[MAXPATHLEN]; /* file name buffer */
ignore = 0;
/* search for header line */
do {
if (!fgets(buf, sizeof(buf), stdin)) {
if (flag) /* no error */
return(0);
warnx("%s: no \"begin\" line", filename);
return(1);
}
} while (strncmp(buf, "begin ", 6) ||
fnmatch("begin [0-7]* *", buf, 0));
(void)sscanf(buf, "begin %o %[^\n\r]", &mode, buf);
if (!sflag && !pflag) {
strncpy(buffn, buf, sizeof(buffn));
if (strrchr(buffn, '/') != NULL)
strncpy(buf, strrchr(buffn, '/') + 1, sizeof(buf));
if (buf[0] == '\0') {
warnx("%s: illegal filename", buffn);
return(1);
}
}
/* handle ~user/file format */
if (buf[0] == '~') {
if (!(p = index(buf, '/'))) {
warnx("%s: illegal ~user", filename);
return(1);
}
*p++ = '\0';
if (!(pw = getpwnam(buf + 1))) {
warnx("%s: no user %s", filename, buf);
return(1);
}
n = strlen(pw->pw_dir);
n1 = strlen(p);
if (n + n1 + 2 > MAXPATHLEN) {
warnx("%s: path too long", filename);
return(1);
}
bcopy(p, buf + n + 1, n1 + 1);
bcopy(pw->pw_dir, buf, n);
buf[n] = '/';
}
/* create output file, set mode */
if (pflag)
; /* print to stdout */
else {
if (iflag && !access(buf, F_OK)) {
(void)fprintf(stderr, "not overwritten: %s\n", buf);
ignore++;
} else if (!freopen(buf, "w", stdout) ||
fchmod(fileno(stdout), mode&0666)) {
warn("%s: %s", buf, filename);
return(1);
}
}
strcpy(buffn, buf); /* store file name from header line */
/* for each input line */
for (;;) {
if (!fgets(p = buf, sizeof(buf), stdin)) {
warnx("%s: short file", filename);
return(1);
}
#define DEC(c) (((c) - ' ') & 077) /* single character decode */
#define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )
/* #define IS_DEC(c) (1) */
#define OUT_OF_RANGE \
{ \
warnx( \
"\n\tinput file: %s\n\tencoded file: %s\n\tcharacter out of range: [%d-%d]", \
filename, buffn, 1 + ' ', 077 + ' ' + 1); \
return(1); \
}
#define PUTCHAR(c) \
if (!ignore) \
putchar(c)
/*
* `n' is used to avoid writing out all the characters
* at the end of the file.
*/
if ((n = DEC(*p)) <= 0)
break;
for (++p; n > 0; p += 4, n -= 3)
if (n >= 3) {
if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) &&
IS_DEC(*(p + 2)) && IS_DEC(*(p + 3))))
OUT_OF_RANGE
ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
PUTCHAR(ch);
ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
PUTCHAR(ch);
ch = DEC(p[2]) << 6 | DEC(p[3]);
PUTCHAR(ch);
}
else {
if (n >= 1) {
if (!(IS_DEC(*p) && IS_DEC(*(p + 1))))
OUT_OF_RANGE
ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
PUTCHAR(ch);
}
if (n >= 2) {
if (!(IS_DEC(*(p + 1)) &&
IS_DEC(*(p + 2))))
OUT_OF_RANGE
ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
PUTCHAR(ch);
}
if (n >= 3) {
if (!(IS_DEC(*(p + 2)) &&
IS_DEC(*(p + 3))))
OUT_OF_RANGE
ch = DEC(p[2]) << 6 | DEC(p[3]);
PUTCHAR(ch);
}
}
}
if (fgets(buf, sizeof(buf), stdin) == NULL ||
(strcmp(buf, "end") && strcmp(buf, "end\n") &&
strcmp(buf, "end\r\n"))) {
warnx("%s: no \"end\" line", filename);
return(1);
}
return(0);
}
static void
usage()
{
(void)fprintf(stderr, "usage: uudecode [-cips] [file ...]\n");
exit(1);
}
