295 lines
6.8 KiB
C
295 lines
6.8 KiB
C
/* $NetBSD: uudecode.c,v 1.25 2009/04/14 06:16:59 lukem Exp $ */
|
|
|
|
/*-
|
|
* 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. 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.
|
|
*/
|
|
|
|
#if HAVE_NBTOOL_CONFIG_H
|
|
#include "nbtool_config.h"
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
#if !defined(lint)
|
|
__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
|
|
The Regents of the University of California. All rights reserved.");
|
|
#if 0
|
|
static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
|
|
#endif
|
|
__RCSID("$NetBSD: uudecode.c,v 1.25 2009/04/14 06:16:59 lukem Exp $");
|
|
#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 <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <locale.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef NO_BASE64
|
|
#include <netinet/in.h>
|
|
#include <resolv.h>
|
|
#endif
|
|
|
|
static int decode(void);
|
|
static void usage(void);
|
|
static int checkend(const char *, const char *, const char *);
|
|
static int base64_decode(void);
|
|
int main(int, char *[]);
|
|
|
|
int base64, pflag;
|
|
const char *filename;
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int ch, rval;
|
|
|
|
setlocale(LC_ALL, "");
|
|
setprogname(argv[0]);
|
|
|
|
pflag = 0;
|
|
while ((ch = getopt(argc, argv, "mp")) != -1)
|
|
switch (ch) {
|
|
case 'm':
|
|
base64 = 1;
|
|
break;
|
|
case 'p':
|
|
pflag = 1;
|
|
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);
|
|
}
|
|
|
|
static int
|
|
decode(void)
|
|
{
|
|
struct passwd *pw;
|
|
int n;
|
|
char ch, *p;
|
|
int n1;
|
|
long mode;
|
|
char *fn;
|
|
char buf[MAXPATHLEN];
|
|
|
|
/* search for header line */
|
|
for (;;) {
|
|
if (!fgets(buf, sizeof(buf), stdin)) {
|
|
warnx("%s: no \"%s\" line", filename, base64 ?
|
|
"begin-base64" : "begin");
|
|
return(1);
|
|
}
|
|
p = buf;
|
|
if (strncmp(p, "begin-base64", 12) == 0) {
|
|
base64 = 1;
|
|
p += 13;
|
|
break;
|
|
} else if (strncmp(p, "begin", 5) == 0) {
|
|
p += 6;
|
|
break;
|
|
} else
|
|
continue;
|
|
}
|
|
|
|
/* must be followed by an octal mode and a space */
|
|
mode = strtol(p, &fn, 8);
|
|
if (fn == (p) || !isspace((unsigned char)*fn) || mode==LONG_MIN || mode==LONG_MAX)
|
|
{
|
|
warnx("%s: invalid mode on \"%s\" line", filename,
|
|
base64 ? "begin-base64" : "begin");
|
|
return(1);
|
|
}
|
|
/* skip whitespace for file name */
|
|
while (*fn && isspace((unsigned char)*fn)) fn++;
|
|
if (*fn == 0) {
|
|
warnx("%s: no filename on \"%s\" line", filename,
|
|
base64 ? "begin-base64" : "begin");
|
|
return(1);
|
|
}
|
|
/* zap newline */
|
|
for (p = fn; *p && *p != '\n'; p++)
|
|
;
|
|
if (*p) *p = 0;
|
|
|
|
/* handle ~user/file format */
|
|
if (*fn == '~') {
|
|
if (!(p = strchr(fn, '/'))) {
|
|
warnx("%s: illegal ~user.", filename);
|
|
return(1);
|
|
}
|
|
*p++ = '\0';
|
|
if (!(pw = getpwnam(fn + 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);
|
|
}
|
|
/* make space at beginning of buf by moving end of pathname */
|
|
memmove(buf + n + 1, p, n1 + 1);
|
|
memmove(buf, pw->pw_dir, n);
|
|
buf[n] = '/';
|
|
fn = buf;
|
|
}
|
|
|
|
/* create output file, set mode */
|
|
if (!pflag && (!freopen(fn, "w", stdout) ||
|
|
fchmod(fileno(stdout), mode & 0666))) {
|
|
warn("%s: %s", fn, filename);
|
|
return(1);
|
|
}
|
|
|
|
if (base64)
|
|
return base64_decode();
|
|
else {
|
|
/* 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 */
|
|
/*
|
|
* `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) {
|
|
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) {
|
|
ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
|
|
putchar(ch);
|
|
}
|
|
if (n >= 2) {
|
|
ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
|
|
putchar(ch);
|
|
}
|
|
if (n >= 3) {
|
|
ch = DEC(p[2]) << 6 | DEC(p[3]);
|
|
putchar(ch);
|
|
}
|
|
}
|
|
}
|
|
if (!fgets(buf, sizeof(buf), stdin) || strcmp(buf, "end\n")) {
|
|
warnx("%s: no \"end\" line.", filename);
|
|
return(1);
|
|
}
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
static int
|
|
checkend(const char *ptr, const char *end, const char *msg)
|
|
{
|
|
size_t n;
|
|
|
|
n = strlen(end);
|
|
if (strncmp(ptr, end, n) != 0 ||
|
|
strspn(ptr + n, "\t\r\n") != strlen(ptr + n)) {
|
|
warnx("%s", msg);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
base64_decode(void)
|
|
{
|
|
int n;
|
|
char inbuf[MAXPATHLEN];
|
|
unsigned char outbuf[MAXPATHLEN * 4];
|
|
|
|
for (;;) {
|
|
if (!fgets(inbuf, sizeof(inbuf), stdin)) {
|
|
warnx("%s: short file.", filename);
|
|
return (1);
|
|
}
|
|
#ifdef NO_BASE64
|
|
warnx("%s: base64 decoding is not supported", filename);
|
|
return (1);
|
|
#else
|
|
n = b64_pton(inbuf, outbuf, sizeof(outbuf));
|
|
#endif
|
|
if (n < 0)
|
|
break;
|
|
fwrite(outbuf, 1, n, stdout);
|
|
}
|
|
return (checkend(inbuf, "====",
|
|
"error decoding base64 input stream"));
|
|
}
|
|
|
|
static void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: %s [-m | -p] [encoded-file ...]\n",
|
|
getprogname());
|
|
exit(1);
|
|
}
|