1/*-
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#include <sys/cdefs.h>
36__unused static const char copyright[] =
37"@(#) Copyright (c) 1983, 1993\n\
38	The Regents of the University of California.  All rights reserved.\n";
39#endif /* not lint */
40
41#ifndef lint
42#if 0
43static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
44#endif
45__unused static const char rcsid[] =
46  "$FreeBSD: src/usr.bin/uuencode/uuencode.c,v 1.4.2.4 2002/06/17 05:01:46 jmallett Exp $";
47#endif /* not lint */
48
49/*
50 * uuencode [input] output
51 *
52 * Encode a file so it can be mailed to a remote system.
53 */
54#include <sys/param.h>
55#include <sys/socket.h>
56#include <sys/stat.h>
57
58#include <netinet/in.h>
59
60#include <err.h>
61#include <arpa/nameser.h>
62#include <resolv.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66#include <unistd.h>
67
68int             b64_ntop __P((u_char const *, size_t, char *, size_t));
69int             b64_pton __P((char const *, u_char *, size_t));
70void encode(void);
71void base64_encode(void);
72static void usage(void);
73
74FILE *output;
75int mode;
76char **av;
77
78int
79main(argc, argv)
80	int argc;
81	char *argv[];
82{
83	struct stat sb;
84	int base64;
85	char ch;
86	char *outfile;
87
88	base64 = 0;
89	outfile = NULL;
90
91	while ((ch = getopt(argc, argv, "mo:")) != -1) {
92		switch (ch) {
93		case 'm':
94			base64 = 1;
95			break;
96		case 'o':
97			outfile = optarg;
98			break;
99		case '?':
100		default:
101			usage();
102		}
103	}
104	argv += optind;
105	argc -= optind;
106
107	switch(argc) {
108	case 2:			/* optional first argument is input file */
109		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
110			err(1, "%s", *argv);
111#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
112		mode = sb.st_mode & RWX;
113		++argv;
114		break;
115	case 1:
116#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
117		mode = RW & ~umask(RW);
118		break;
119	case 0:
120	default:
121		usage();
122	}
123
124	av = argv;
125
126	if (outfile != NULL) {
127		output = fopen(outfile, "w+");
128		if (output == NULL)
129			err(1, "unable to open %s for output", outfile);
130	} else
131		output = stdout;
132	if (base64)
133		base64_encode();
134	else
135		encode();
136	if (ferror(output))
137		errx(1, "write error");
138	exit(0);
139}
140
141/* ENC is the basic 1 character encoding function to make a char printing */
142#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
143
144/*
145 * Copy from in to out, encoding in base64 as you go along.
146 */
147void
148base64_encode()
149{
150	/*
151	 * Output must fit into 80 columns, chunks come in 4, leave 1.
152	 */
153#define	GROUPS	((80 / 4) - 1)
154	unsigned char buf[3];
155	char buf2[sizeof(buf) * 2 + 1];
156	size_t n;
157	int rv, sequence;
158
159	sequence = 0;
160
161	fprintf(output, "begin-base64 %o %s\n", mode, *av);
162	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
163		++sequence;
164		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
165		if (rv == -1)
166			errx(1, "b64_ntop: error encoding base64");
167		fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
168	}
169	if (sequence % GROUPS)
170		fprintf(output, "\n");
171	fprintf(output, "====\n");
172}
173
174/*
175 * Copy from in to out, encoding as you go along.
176 */
177void
178encode()
179{
180	register int ch, n;
181	register char *p;
182	char buf[80];
183
184	(void)fprintf(output, "begin %o %s\n", mode, *av);
185	while ((n = fread(buf, 1, 45, stdin))) {
186		ch = ENC(n);
187		if (fputc(ch, output) == EOF)
188			break;
189		for (p = buf; n > 0; n -= 3, p += 3) {
190			/* Pad with nulls if not a multiple of 3. */
191			if (n < 3) {
192				p[2] = '\0';
193				if (n < 2)
194					p[1] = '\0';
195			}
196			ch = *p >> 2;
197			ch = ENC(ch);
198			if (fputc(ch, output) == EOF)
199				break;
200			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
201			ch = ENC(ch);
202			if (fputc(ch, output) == EOF)
203				break;
204			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
205			ch = ENC(ch);
206			if (fputc(ch, output) == EOF)
207				break;
208			ch = p[2] & 077;
209			ch = ENC(ch);
210			if (fputc(ch, output) == EOF)
211				break;
212		}
213		if (fputc('\n', output) == EOF)
214			break;
215	}
216	if (ferror(stdin))
217		errx(1, "read error");
218	(void)fprintf(output, "%c\nend\n", ENC('\0'));
219}
220
221static void
222usage()
223{
224	(void)fprintf(stderr,"usage: uuencode [-m] [-o outfile] [infile] remotefile\n");
225	exit(1);
226}
227