2006-07-02 19:47:05 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
2003-11-06 03:17:23 +00:00
|
|
|
/*
|
2004-04-25 05:11:19 +00:00
|
|
|
* Copyright 2003, Glenn McGrath <bug1@iinet.net.au>
|
2000-06-13 06:54:53 +00:00
|
|
|
*
|
2006-04-17 22:49:30 +00:00
|
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
2000-06-13 06:54:53 +00:00
|
|
|
*
|
2003-11-06 03:17:23 +00:00
|
|
|
* Based on specification from
|
|
|
|
* http://www.opengroup.org/onlinepubs/007904975/utilities/uuencode.html
|
2000-06-13 06:54:53 +00:00
|
|
|
*
|
2006-04-17 22:49:30 +00:00
|
|
|
* Bugs: the spec doesn't mention anything about "`\n`\n" prior to the
|
|
|
|
* "end" line
|
2000-06-13 06:54:53 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
|
2007-05-26 19:00:18 +00:00
|
|
|
#include "libbb.h"
|
2000-06-13 06:54:53 +00:00
|
|
|
|
2007-01-20 21:29:32 +00:00
|
|
|
static void read_stduu(FILE *src_stream, FILE *dst_stream)
|
2000-06-13 06:54:53 +00:00
|
|
|
{
|
2003-11-06 03:17:23 +00:00
|
|
|
char *line;
|
|
|
|
|
2006-10-12 22:43:20 +00:00
|
|
|
while ((line = xmalloc_getline(src_stream)) != NULL) {
|
2003-11-06 03:17:23 +00:00
|
|
|
int length;
|
|
|
|
char *line_ptr = line;
|
|
|
|
|
|
|
|
if (strcmp(line, "end") == 0) {
|
2007-01-20 21:29:32 +00:00
|
|
|
return;
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
length = ((*line_ptr - 0x20) & 0x3f)* 4 / 3;
|
|
|
|
|
|
|
|
if (length <= 0) {
|
|
|
|
/* Ignore the "`\n" line, why is it even in the encode file ? */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (length > 60) {
|
2006-10-27 09:02:31 +00:00
|
|
|
bb_error_msg_and_die("line too long");
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
2004-03-15 08:29:22 +00:00
|
|
|
|
2003-11-06 03:17:23 +00:00
|
|
|
line_ptr++;
|
2006-09-21 20:40:56 +00:00
|
|
|
/* Tolerate an overly long line to accomodate a possible exta '`' */
|
2006-01-31 14:25:52 +00:00
|
|
|
if (strlen(line_ptr) < (size_t)length) {
|
2006-10-27 09:02:31 +00:00
|
|
|
bb_error_msg_and_die("short file");
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
|
2006-01-25 00:08:53 +00:00
|
|
|
while (length > 0) {
|
2003-11-06 03:17:23 +00:00
|
|
|
/* Merge four 6 bit chars to three 8 bit chars */
|
2006-01-31 14:25:52 +00:00
|
|
|
fputc(((line_ptr[0] - 0x20) & 077) << 2 | ((line_ptr[1] - 0x20) & 077) >> 4, dst_stream);
|
2003-11-06 03:17:23 +00:00
|
|
|
line_ptr++;
|
|
|
|
length--;
|
|
|
|
if (length == 0) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2006-01-25 00:08:53 +00:00
|
|
|
fputc(((line_ptr[0] - 0x20) & 077) << 4 | ((line_ptr[1] - 0x20) & 077) >> 2, dst_stream);
|
2003-11-06 03:17:23 +00:00
|
|
|
line_ptr++;
|
|
|
|
length--;
|
|
|
|
if (length == 0) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2006-01-25 00:08:53 +00:00
|
|
|
fputc(((line_ptr[0] - 0x20) & 077) << 6 | ((line_ptr[1] - 0x20) & 077), dst_stream);
|
2003-11-06 03:17:23 +00:00
|
|
|
line_ptr += 2;
|
|
|
|
length -= 2;
|
|
|
|
}
|
|
|
|
free(line);
|
|
|
|
}
|
2006-10-27 09:02:31 +00:00
|
|
|
bb_error_msg_and_die("short file");
|
2000-06-13 06:54:53 +00:00
|
|
|
}
|
|
|
|
|
2007-01-20 21:29:32 +00:00
|
|
|
static void read_base64(FILE *src_stream, FILE *dst_stream)
|
2000-06-13 06:54:53 +00:00
|
|
|
{
|
2007-06-04 23:32:35 +00:00
|
|
|
int term_count = 1;
|
2003-11-06 03:17:23 +00:00
|
|
|
|
|
|
|
while (1) {
|
|
|
|
char translated[4];
|
|
|
|
int count = 0;
|
|
|
|
|
|
|
|
while (count < 4) {
|
|
|
|
char *table_ptr;
|
2006-01-30 19:48:23 +00:00
|
|
|
int ch;
|
2003-11-06 03:17:23 +00:00
|
|
|
|
2007-06-12 07:24:11 +00:00
|
|
|
/* Get next _valid_ character.
|
|
|
|
* global vector bb_uuenc_tbl_base64[] contains this string:
|
|
|
|
* "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n"
|
|
|
|
*/
|
2003-11-06 03:17:23 +00:00
|
|
|
do {
|
|
|
|
ch = fgetc(src_stream);
|
|
|
|
if (ch == EOF) {
|
2006-10-27 09:02:31 +00:00
|
|
|
bb_error_msg_and_die("short file");
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
2007-06-12 07:24:11 +00:00
|
|
|
table_ptr = strchr(bb_uuenc_tbl_base64, ch);
|
2007-06-04 23:32:35 +00:00
|
|
|
} while (table_ptr == NULL);
|
2003-11-06 03:17:23 +00:00
|
|
|
|
2007-06-12 07:24:11 +00:00
|
|
|
/* Convert encoded character to decimal */
|
|
|
|
ch = table_ptr - bb_uuenc_tbl_base64;
|
2003-11-06 03:17:23 +00:00
|
|
|
|
|
|
|
if (*table_ptr == '=') {
|
|
|
|
if (term_count == 0) {
|
2007-06-04 23:32:35 +00:00
|
|
|
translated[count] = '\0';
|
2003-11-06 03:17:23 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
term_count++;
|
2007-06-04 23:32:35 +00:00
|
|
|
} else if (*table_ptr == '\n') {
|
2003-11-06 03:17:23 +00:00
|
|
|
/* Check for terminating line */
|
|
|
|
if (term_count == 5) {
|
2007-01-20 21:29:32 +00:00
|
|
|
return;
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
term_count = 1;
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
translated[count] = ch;
|
|
|
|
count++;
|
|
|
|
term_count = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Merge 6 bit chars to 8 bit */
|
2007-06-04 23:32:35 +00:00
|
|
|
if (count > 1) {
|
|
|
|
fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
|
|
|
|
}
|
2003-11-06 03:17:23 +00:00
|
|
|
if (count > 2) {
|
2006-01-25 00:08:53 +00:00
|
|
|
fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
if (count > 3) {
|
2006-01-25 00:08:53 +00:00
|
|
|
fputc(translated[2] << 6 | translated[3], dst_stream);
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
}
|
2000-06-13 06:54:53 +00:00
|
|
|
}
|
|
|
|
|
2007-02-03 17:28:39 +00:00
|
|
|
int uudecode_main(int argc, char **argv);
|
2006-03-06 20:47:33 +00:00
|
|
|
int uudecode_main(int argc, char **argv)
|
2000-06-13 06:54:53 +00:00
|
|
|
{
|
2007-06-04 23:32:35 +00:00
|
|
|
FILE *src_stream = stdin;
|
2003-11-06 03:17:23 +00:00
|
|
|
char *outname = NULL;
|
|
|
|
char *line;
|
|
|
|
|
2007-06-04 23:32:35 +00:00
|
|
|
opt_complementary = "?1"; /* 1 argument max */
|
2007-08-18 15:32:12 +00:00
|
|
|
getopt32(argv, "o:", &outname);
|
2007-06-04 23:32:35 +00:00
|
|
|
argv += optind;
|
2003-11-06 03:17:23 +00:00
|
|
|
|
2007-06-04 23:32:35 +00:00
|
|
|
if (argv[0])
|
|
|
|
src_stream = xfopen(argv[0], "r");
|
2003-11-06 03:17:23 +00:00
|
|
|
|
|
|
|
/* Search for the start of the encoding */
|
2006-10-12 22:43:20 +00:00
|
|
|
while ((line = xmalloc_getline(src_stream)) != NULL) {
|
2007-01-20 21:29:32 +00:00
|
|
|
void (*decode_fn_ptr)(FILE * src, FILE * dst);
|
2006-09-23 19:56:21 +00:00
|
|
|
char *line_ptr;
|
|
|
|
FILE *dst_stream;
|
|
|
|
int mode;
|
2007-01-11 17:20:00 +00:00
|
|
|
|
2006-07-31 22:50:12 +00:00
|
|
|
if (strncmp(line, "begin-base64 ", 13) == 0) {
|
2003-11-06 03:17:23 +00:00
|
|
|
line_ptr = line + 13;
|
|
|
|
decode_fn_ptr = read_base64;
|
|
|
|
} else if (strncmp(line, "begin ", 6) == 0) {
|
|
|
|
line_ptr = line + 6;
|
|
|
|
decode_fn_ptr = read_stduu;
|
2006-09-23 19:56:21 +00:00
|
|
|
} else {
|
|
|
|
free(line);
|
|
|
|
continue;
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
|
2007-06-04 23:32:35 +00:00
|
|
|
/* begin line found. decode and exit */
|
2006-09-23 19:56:21 +00:00
|
|
|
mode = strtoul(line_ptr, NULL, 8);
|
|
|
|
if (outname == NULL) {
|
|
|
|
outname = strchr(line_ptr, ' ');
|
|
|
|
if ((outname == NULL) || (*outname == '\0')) {
|
|
|
|
break;
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
2006-09-23 19:56:21 +00:00
|
|
|
outname++;
|
|
|
|
}
|
2007-06-04 23:32:35 +00:00
|
|
|
dst_stream = stdout;
|
|
|
|
if (NOT_LONE_DASH(outname)) {
|
2006-09-23 19:56:21 +00:00
|
|
|
dst_stream = xfopen(outname, "w");
|
|
|
|
chmod(outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO));
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
|
|
|
free(line);
|
2007-01-20 21:29:32 +00:00
|
|
|
decode_fn_ptr(src_stream, dst_stream);
|
2007-06-04 23:32:35 +00:00
|
|
|
/* fclose_if_not_stdin(src_stream); - redundant */
|
2007-01-20 21:29:32 +00:00
|
|
|
return EXIT_SUCCESS;
|
2003-11-06 03:17:23 +00:00
|
|
|
}
|
2006-10-27 09:02:31 +00:00
|
|
|
bb_error_msg_and_die("no 'begin' line");
|
2000-06-13 06:54:53 +00:00
|
|
|
}
|
2007-06-04 23:32:35 +00:00
|
|
|
|
|
|
|
/* Test script.
|
|
|
|
Put this into an empty dir with busybox binary, an run.
|
|
|
|
|
|
|
|
#!/bin/sh
|
|
|
|
test -x busybox || { echo "No ./busybox?"; exit; }
|
|
|
|
ln -sf busybox uudecode
|
|
|
|
ln -sf busybox uuencode
|
|
|
|
>A_null
|
|
|
|
echo -n A >A
|
|
|
|
echo -n AB >AB
|
|
|
|
echo -n ABC >ABC
|
|
|
|
echo -n ABCD >ABCD
|
|
|
|
echo -n ABCDE >ABCDE
|
|
|
|
echo -n ABCDEF >ABCDEF
|
|
|
|
cat busybox >A_bbox
|
|
|
|
for f in A*; do
|
|
|
|
echo uuencode $f
|
|
|
|
./uuencode $f <$f >u_$f
|
|
|
|
./uuencode -m $f <$f >m_$f
|
|
|
|
done
|
|
|
|
mkdir unpk_u unpk_m 2>/dev/null
|
|
|
|
for f in u_*; do
|
|
|
|
./uudecode <$f -o unpk_u/${f:2}
|
|
|
|
diff -a ${f:2} unpk_u/${f:2} >/dev/null 2>&1
|
|
|
|
echo uudecode $f: $?
|
|
|
|
done
|
|
|
|
for f in m_*; do
|
|
|
|
./uudecode <$f -o unpk_m/${f:2}
|
|
|
|
diff -a ${f:2} unpk_m/${f:2} >/dev/null 2>&1
|
|
|
|
echo uudecode $f: $?
|
|
|
|
done
|
|
|
|
*/
|