uuencode.c revision 92922 
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
35static const char copyright[] =
36"@(#) Copyright (c) 1983, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/usr.bin/uuencode/uuencode.c 92922 2002-03-22 01:42:45Z imp $";
46#endif /* not lint */
47
48/*
49 * uuencode [input] output
50 *
51 * Encode a file so it can be mailed to a remote system.
52 */
53#include <sys/param.h>
54#include <sys/socket.h>
55#include <sys/stat.h>
56
57#include <netinet/in.h>
58
59#include <err.h>
60#include <resolv.h>
61#include <stdio.h>
62#include <stdlib.h>
63#include <string.h>
64#include <unistd.h>
65
66void encode(void);
67void base64_encode(void);
68static void usage(void);
69
70FILE *output;
71int mode;
72char **av;
73
74int
75main(argc, argv)
76	int argc;
77	char *argv[];
78{
79	struct stat sb;
80	int base64;
81	char ch;
82	char *outfile;
83
84	base64 = 0;
85	outfile = NULL;
86
87	while ((ch = getopt(argc, argv, "mo:")) != -1) {
88		switch (ch) {
89		case 'm':
90			base64 = 1;
91			break;
92		case 'o':
93			outfile = optarg;
94			break;
95		case '?':
96		default:
97			usage();
98		}
99	}
100	argv += optind;
101	argc -= optind;
102
103	switch(argc) {
104	case 2:			/* optional first argument is input file */
105		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
106			err(1, "%s", *argv);
107#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
108		mode = sb.st_mode & RWX;
109		++argv;
110		break;
111	case 1:
112#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
113		mode = RW & ~umask(RW);
114		break;
115	case 0:
116	default:
117		usage();
118	}
119
120	av = argv;
121
122	if (outfile != NULL) {
123		output = fopen(outfile, "w+");
124		if (output == NULL)
125			err(1, "unable to open %s for output", outfile);
126	} else
127		output = stdout;
128	if (base64)
129		base64_encode();
130	else
131		encode();
132	if (ferror(output))
133		errx(1, "write error");
134	exit(0);
135}
136
137/* ENC is the basic 1 character encoding function to make a char printing */
138#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
139
140/*
141 * Copy from in to out, encoding in base64 as you go along.
142 */
143void
144base64_encode()
145{
146#define	GROUPS	8 /* Group output chunks */
147	unsigned char buf[6];
148	char buf2[16];
149	size_t n;
150	int rv, sequence;
151
152	sequence = 0;
153
154	fprintf(output, "begin-base64 %o %s\n", mode, *av);
155	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
156		++sequence;
157		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
158		if (rv == -1)
159			errx(1, "b64_ntop: error encoding base64");
160		fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
161	}
162	if (sequence % GROUPS)
163		fprintf(output, "\n");
164	fprintf(output, "====\n");
165}
166
167/*
168 * Copy from in to out, encoding as you go along.
169 */
170void
171encode()
172{
173	register int ch, n;
174	register char *p;
175	char buf[80];
176
177	(void)fprintf(output, "begin %o %s\n", mode, *av);
178	while ((n = fread(buf, 1, 45, stdin))) {
179		ch = ENC(n);
180		if (fputc(ch, output) == EOF)
181			break;
182		for (p = buf; n > 0; n -= 3, p += 3) {
183			/* Pad with nulls if not a multiple of 3. */
184			if (n < 3) {
185				p[2] = '\0';
186				if (n < 2)
187					p[1] = '\0';
188			}
189			ch = *p >> 2;
190			ch = ENC(ch);
191			if (fputc(ch, output) == EOF)
192				break;
193			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
194			ch = ENC(ch);
195			if (fputc(ch, output) == EOF)
196				break;
197			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
198			ch = ENC(ch);
199			if (fputc(ch, output) == EOF)
200				break;
201			ch = p[2] & 077;
202			ch = ENC(ch);
203			if (fputc(ch, output) == EOF)
204				break;
205		}
206		if (fputc('\n', output) == EOF)
207			break;
208	}
209	if (ferror(stdin))
210		errx(1, "read error");
211	(void)fprintf(output, "%c\nend\n", ENC('\0'));
212}
213
214static void
215usage()
216{
217	(void)fprintf(stderr,"usage: uuencode [-m] [-o outfile] [infile] remotefile\n");
218	exit(1);
219}
220