uuencode.c revision 1.14 
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
63int main(int, char *[]);
64static void encode(void);
65static void base64_encode(void);
66static void usage(void);
67
68int
69main(int argc, char *argv[])
70{
71	struct stat sb;
72	int base64, ch, mode;
73
74	mode = 0;
75	base64 = 0;
76	setlocale(LC_ALL, "");
77	setprogname(argv[0]);
78
79	while ((ch = getopt(argc, argv, "m")) != -1) {
80		switch(ch) {
81		case 'm':
82			base64 = 1;
83			break;
84		default:
85			usage();
86		}
87	}
88	argv += optind;
89	argc -= optind;
90
91	switch(argc) {
92	case 2:			/* optional first argument is input file */
93		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
94			err(1, "%s", *argv);
95#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
96		mode = sb.st_mode & RWX;
97		++argv;
98		break;
99	case 1:
100#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
101		mode = RW & ~umask(RW);
102		break;
103	case 0:
104	default:
105		usage();
106	}
107
108	if (base64) {
109		(void)printf("begin-base64 %o %s\n", mode, *argv);
110		base64_encode();
111		(void)printf("====\n");
112	} else {
113		(void)printf("begin %o %s\n", mode, *argv);
114		encode();
115		(void)printf("end\n");
116	}
117
118	if (ferror(stdout))
119		err(1, "write error");
120	exit(0);
121}
122
123/* ENC is the basic 1 character encoding function to make a char printing */
124#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
125
126/*
127 * copy from in to out, encoding in base64 as you go along.
128 */
129static void
130base64_encode(void)
131{
132	/*
133	 * Output must fit into 80 columns, chunks come in 4, leave 1.
134	 */
135#define GROUPS 	((70 / 4) - 1)
136	unsigned char buf[3];
137	char buf2[sizeof(buf) * 2 + 1];
138	size_t n;
139	int rv, sequence;
140
141	sequence = 0;
142
143	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
144		++sequence;
145		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
146		if (rv == -1)
147			errx(1, "b64_ntop: error encoding base64");
148		printf("%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
149	}
150	if (sequence % GROUPS)
151		printf("\n");
152}
153
154/*
155 * copy from in to out, encoding as you go along.
156 */
157static void
158encode(void)
159{
160	int ch, n;
161	char *p;
162	char buf[80];
163
164	while ((n = fread(buf, 1, 45, stdin)) > 0) {
165		ch = ENC(n);
166		if (putchar(ch) == EOF)
167			break;
168		for (p = buf; n > 0; n -= 3, p += 3) {
169			ch = *p >> 2;
170			ch = ENC(ch);
171			if (putchar(ch) == EOF)
172				break;
173			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
174			ch = ENC(ch);
175			if (putchar(ch) == EOF)
176				break;
177			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
178			ch = ENC(ch);
179			if (putchar(ch) == EOF)
180				break;
181			ch = p[2] & 077;
182			ch = ENC(ch);
183			if (putchar(ch) == EOF)
184				break;
185		}
186		if (putchar('\n') == EOF)
187			break;
188	}
189	if (ferror(stdin))
190		err(1, "read error.");
191	ch = ENC('\0');
192	(void)putchar(ch);
193	(void)putchar('\n');
194}
195
196static void
197usage(void)
198{
199	(void)fprintf(stderr, "usage: %s [-m] [inputfile] outputname\n",
200		      getprogname());
201	exit(1);
202}
203