uuencode.c revision 96386 
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 96386 2002-05-11 03:29:04Z alfred $";
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(int argc, char *argv[])
76{
77	struct stat sb;
78	int base64;
79	char ch;
80	char *outfile;
81
82	base64 = 0;
83	outfile = NULL;
84
85	while ((ch = getopt(argc, argv, "mo:")) != -1) {
86		switch (ch) {
87		case 'm':
88			base64 = 1;
89			break;
90		case 'o':
91			outfile = optarg;
92			break;
93		case '?':
94		default:
95			usage();
96		}
97	}
98	argv += optind;
99	argc -= optind;
100
101	switch(argc) {
102	case 2:			/* optional first argument is input file */
103		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
104			err(1, "%s", *argv);
105#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
106		mode = sb.st_mode & RWX;
107		++argv;
108		break;
109	case 1:
110#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
111		mode = RW & ~umask(RW);
112		break;
113	case 0:
114	default:
115		usage();
116	}
117
118	av = argv;
119
120	if (outfile != NULL) {
121		output = fopen(outfile, "w+");
122		if (output == NULL)
123			err(1, "unable to open %s for output", outfile);
124	} else
125		output = stdout;
126	if (base64)
127		base64_encode();
128	else
129		encode();
130	if (ferror(output))
131		errx(1, "write error");
132	exit(0);
133}
134
135/* ENC is the basic 1 character encoding function to make a char printing */
136#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
137
138/*
139 * Copy from in to out, encoding in base64 as you go along.
140 */
141void
142base64_encode()
143{
144#define	GROUPS	8 /* Group output chunks */
145	unsigned char buf[6];
146	char buf2[16];
147	size_t n;
148	int rv, sequence;
149
150	sequence = 0;
151
152	fprintf(output, "begin-base64 %o %s\n", mode, *av);
153	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
154		++sequence;
155		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
156		if (rv == -1)
157			errx(1, "b64_ntop: error encoding base64");
158		fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
159	}
160	if (sequence % GROUPS)
161		fprintf(output, "\n");
162	fprintf(output, "====\n");
163}
164
165/*
166 * Copy from in to out, encoding as you go along.
167 */
168void
169encode()
170{
171	register int ch, n;
172	register char *p;
173	char buf[80];
174
175	(void)fprintf(output, "begin %o %s\n", mode, *av);
176	while ((n = fread(buf, 1, 45, stdin))) {
177		ch = ENC(n);
178		if (fputc(ch, output) == EOF)
179			break;
180		for (p = buf; n > 0; n -= 3, p += 3) {
181			/* Pad with nulls if not a multiple of 3. */
182			if (n < 3) {
183				p[2] = '\0';
184				if (n < 2)
185					p[1] = '\0';
186			}
187			ch = *p >> 2;
188			ch = ENC(ch);
189			if (fputc(ch, output) == EOF)
190				break;
191			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
192			ch = ENC(ch);
193			if (fputc(ch, output) == EOF)
194				break;
195			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
196			ch = ENC(ch);
197			if (fputc(ch, output) == EOF)
198				break;
199			ch = p[2] & 077;
200			ch = ENC(ch);
201			if (fputc(ch, output) == EOF)
202				break;
203		}
204		if (fputc('\n', output) == EOF)
205			break;
206	}
207	if (ferror(stdin))
208		errx(1, "read error");
209	(void)fprintf(output, "%c\nend\n", ENC('\0'));
210}
211
212static void
213usage()
214{
215	(void)fprintf(stderr,"usage: uuencode [-m] [-o outfile] [infile] remotefile\n");
216	exit(1);
217}
218