1/*	$NetBSD: uuencode.c,v 1.14 2008/11/29 22:36:13 dholland Exp $	*/
2
3/*-
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
41#else
42__RCSID("$NetBSD: uuencode.c,v 1.14 2008/11/29 22:36:13 dholland Exp $");
43#endif
44#endif /* not lint */
45
46/*
47 * uuencode [input] output
48 *
49 * Encode a file so it can be mailed to a remote system.
50 */
51#include <sys/types.h>
52#include <sys/stat.h>
53#include <netinet/in.h>
54#include <err.h>
55#include <errno.h>
56#include <locale.h>
57#include <resolv.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <unistd.h>
62
63static void encode(void);
64static void base64_encode(void);
65__dead static void usage(void);
66
67int
68main(int argc, char *argv[])
69{
70	struct stat sb;
71	int base64, ch, mode;
72
73	mode = 0;
74	base64 = 0;
75	setlocale(LC_ALL, "");
76	setprogname(argv[0]);
77
78	while ((ch = getopt(argc, argv, "m")) != -1) {
79		switch(ch) {
80		case 'm':
81			base64 = 1;
82			break;
83		default:
84			usage();
85		}
86	}
87	argv += optind;
88	argc -= optind;
89
90	switch(argc) {
91	case 2:			/* optional first argument is input file */
92		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
93			err(1, "%s", *argv);
94#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
95		mode = sb.st_mode & RWX;
96		++argv;
97		break;
98	case 1:
99#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
100		mode = RW & ~umask(RW);
101		break;
102	case 0:
103	default:
104		usage();
105	}
106
107	if (base64) {
108		(void)printf("begin-base64 %o %s\n", mode, *argv);
109		base64_encode();
110		(void)printf("====\n");
111	} else {
112		(void)printf("begin %o %s\n", mode, *argv);
113		encode();
114		(void)printf("end\n");
115	}
116
117	if (ferror(stdout))
118		err(1, "write error");
119	exit(0);
120}
121
122/* ENC is the basic 1 character encoding function to make a char printing */
123#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
124
125/*
126 * copy from in to out, encoding in base64 as you go along.
127 */
128static void
129base64_encode(void)
130{
131	/*
132	 * Output must fit into 80 columns, chunks come in 4, leave 1.
133	 */
134#define GROUPS 	((70 / 4) - 1)
135	unsigned char buf[3];
136	char buf2[sizeof(buf) * 2 + 1];
137	size_t n;
138	int rv, sequence;
139
140	sequence = 0;
141
142	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
143		++sequence;
144		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
145		if (rv == -1)
146			errx(1, "b64_ntop: error encoding base64");
147		printf("%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
148	}
149	if (sequence % GROUPS)
150		printf("\n");
151}
152
153/*
154 * copy from in to out, encoding as you go along.
155 */
156static void
157encode(void)
158{
159	int ch, n;
160	char *p;
161	char buf[80];
162
163	while ((n = fread(buf, 1, 45, stdin)) > 0) {
164		ch = ENC(n);
165		if (putchar(ch) == EOF)
166			break;
167		for (p = buf; n > 0; n -= 3, p += 3) {
168			ch = *p >> 2;
169			ch = ENC(ch);
170			if (putchar(ch) == EOF)
171				break;
172			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
173			ch = ENC(ch);
174			if (putchar(ch) == EOF)
175				break;
176			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
177			ch = ENC(ch);
178			if (putchar(ch) == EOF)
179				break;
180			ch = p[2] & 077;
181			ch = ENC(ch);
182			if (putchar(ch) == EOF)
183				break;
184		}
185		if (putchar('\n') == EOF)
186			break;
187	}
188	if (ferror(stdin))
189		err(1, "read error.");
190	ch = ENC('\0');
191	(void)putchar(ch);
192	(void)putchar('\n');
193}
194
195static void
196usage(void)
197{
198	(void)fprintf(stderr, "usage: %s [-m] [inputfile] outputname\n",
199		      getprogname());
200	exit(1);
201}
202