3 * Copyright 2003, Glenn McGrath <bug1@optushome.com.au>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as published
7 * by the Free Software Foundation; either version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Library General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * Based on specification from
19 * http://www.opengroup.org/onlinepubs/007904975/utilities/uuencode.html
21 * Bugs: the spec doesnt mention anything about "`\n`\n" prior to the "end" line
33 static int read_stduu(FILE *src_stream, FILE *dst_stream)
37 while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
39 char *line_ptr = line;
41 if (strcmp(line, "end") == 0) {
44 length = ((*line_ptr - 0x20) & 0x3f)* 4 / 3;
47 /* Ignore the "`\n" line, why is it even in the encode file ? */
51 bb_error_msg_and_die("Line too long");
55 /* Tolerate an overly long line to acomadate a possible exta '`' */
56 if (strlen(line_ptr) < length) {
57 bb_error_msg_and_die("Short file");
61 /* Merge four 6 bit chars to three 8 bit chars */
62 fputc(((line_ptr[0] - 0x20) & 077) << 2 | ((line_ptr[1] - 0x20) & 077) >> 4, dst_stream);
69 fputc(((line_ptr[0] - 0x20) & 077) << 4 | ((line_ptr[1] - 0x20) & 077) >> 2, dst_stream);
76 fputc(((line_ptr[0] - 0x20) & 077) << 6 | ((line_ptr[1] - 0x20) & 077), dst_stream);
82 bb_error_msg_and_die("Short file");
85 static int read_base64(FILE *src_stream, FILE *dst_stream)
87 const char *base64_table =
88 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n";
99 /* Get next _valid_ character */
101 ch = fgetc(src_stream);
103 bb_error_msg_and_die("Short file");
105 } while ((table_ptr = strchr(base64_table, ch)) == NULL);
107 /* Convert encoded charcter to decimal */
108 ch = table_ptr - base64_table;
110 if (*table_ptr == '=') {
111 if (term_count == 0) {
112 translated[count] = 0;
117 else if (*table_ptr == '\n') {
118 /* Check for terminating line */
119 if (term_count == 5) {
120 return(EXIT_SUCCESS);
125 translated[count] = ch;
131 /* Merge 6 bit chars to 8 bit */
132 fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
134 fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
137 fputc(translated[2] << 6 | translated[3], dst_stream);
142 extern int uudecode_main(int argc, char **argv)
144 int (*decode_fn_ptr) (FILE * src, FILE * dst);
146 char *outname = NULL;
150 opt = bb_getopt_ulflags(argc, argv, "o:", &outname);
152 if (optind == argc) {
154 } else if (optind + 1 == argc) {
155 src_stream = bb_xfopen(argv[optind], "r");
160 /* Search for the start of the encoding */
161 while ((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
162 char *line_ptr = NULL;
166 } else if (strncmp(line, "begin-base64 ", 13) == 0) {
167 line_ptr = line + 13;
168 decode_fn_ptr = read_base64;
169 } else if (strncmp(line, "begin ", 6) == 0) {
171 decode_fn_ptr = read_stduu;
179 mode = strtoul(line_ptr, NULL, 8);
180 if (outname == NULL) {
181 outname = strchr(line_ptr, ' ');
182 if ((outname == NULL) || (*outname == '\0')) {
187 if (strcmp(outname, "-") == 0) {
190 dst_stream = bb_xfopen(outname, "w");
191 chmod(outname, mode & (S_IRWXU | S_IRWXG | S_IRWXO));
194 ret = decode_fn_ptr(src_stream, dst_stream);
195 bb_fclose_nonstdin(src_stream);
200 bb_error_msg_and_die("No `begin' line");