uuencode.c revision 114594 
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#if 0
35#ifndef lint
36static 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
42static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
43#endif /* not lint */
44#endif
45#include <sys/cdefs.h>
46__FBSDID("$FreeBSD: head/usr.bin/uuencode/uuencode.c 114594 2003-05-03 19:44:46Z obrien $");
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 <libgen.h>
61#include <resolv.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <unistd.h>
66
67void encode(void);
68void base64_encode(void);
69static void usage(void);
70
71FILE *output;
72int mode;
73char **av;
74
75int
76main(int argc, char *argv[])
77{
78	struct stat sb;
79	int base64;
80	char ch;
81	char *outfile;
82
83	base64 = 0;
84	outfile = NULL;
85
86	if (strcmp(basename(argv[0]), "b64encode") == 0)
87		base64 = 1;
88
89	while ((ch = getopt(argc, argv, "mo:")) != -1) {
90		switch (ch) {
91		case 'm':
92			base64 = 1;
93			break;
94		case 'o':
95			outfile = optarg;
96			break;
97		case '?':
98		default:
99			usage();
100		}
101	}
102	argv += optind;
103	argc -= optind;
104
105	switch(argc) {
106	case 2:			/* optional first argument is input file */
107		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
108			err(1, "%s", *argv);
109#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
110		mode = sb.st_mode & RWX;
111		++argv;
112		break;
113	case 1:
114#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
115		mode = RW & ~umask(RW);
116		break;
117	case 0:
118	default:
119		usage();
120	}
121
122	av = argv;
123
124	if (outfile != NULL) {
125		output = fopen(outfile, "w+");
126		if (output == NULL)
127			err(1, "unable to open %s for output", outfile);
128	} else
129		output = stdout;
130	if (base64)
131		base64_encode();
132	else
133		encode();
134	if (ferror(output))
135		errx(1, "write error");
136	exit(0);
137}
138
139/* ENC is the basic 1 character encoding function to make a char printing */
140#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
141
142/*
143 * Copy from in to out, encoding in base64 as you go along.
144 */
145void
146base64_encode(void)
147{
148	/*
149	 * Output must fit into 80 columns, chunks come in 4, leave 1.
150	 */
151#define	GROUPS	((80 / 4) - 1)
152	unsigned char buf[3];
153	char buf2[sizeof(buf) * 2 + 1];
154	size_t n;
155	int rv, sequence;
156
157	sequence = 0;
158
159	fprintf(output, "begin-base64 %o %s\n", mode, *av);
160	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
161		++sequence;
162		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
163		if (rv == -1)
164			errx(1, "b64_ntop: error encoding base64");
165		fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
166	}
167	if (sequence % GROUPS)
168		fprintf(output, "\n");
169	fprintf(output, "====\n");
170}
171
172/*
173 * Copy from in to out, encoding as you go along.
174 */
175void
176encode(void)
177{
178	register int ch, n;
179	register char *p;
180	char buf[80];
181
182	(void)fprintf(output, "begin %o %s\n", mode, *av);
183	while ((n = fread(buf, 1, 45, stdin))) {
184		ch = ENC(n);
185		if (fputc(ch, output) == EOF)
186			break;
187		for (p = buf; n > 0; n -= 3, p += 3) {
188			/* Pad with nulls if not a multiple of 3. */
189			if (n < 3) {
190				p[2] = '\0';
191				if (n < 2)
192					p[1] = '\0';
193			}
194			ch = *p >> 2;
195			ch = ENC(ch);
196			if (fputc(ch, output) == EOF)
197				break;
198			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
199			ch = ENC(ch);
200			if (fputc(ch, output) == EOF)
201				break;
202			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
203			ch = ENC(ch);
204			if (fputc(ch, output) == EOF)
205				break;
206			ch = p[2] & 077;
207			ch = ENC(ch);
208			if (fputc(ch, output) == EOF)
209				break;
210		}
211		if (fputc('\n', output) == EOF)
212			break;
213	}
214	if (ferror(stdin))
215		errx(1, "read error");
216	(void)fprintf(output, "%c\nend\n", ENC('\0'));
217}
218
219static void
220usage(void)
221{
222	(void)fprintf(stderr,
223"usage: uuencode [-m] [-o outfile] [infile] remotefile\n"
224"       b64encode [-o outfile] [infile] remotefile\n");
225	exit(1);
226}
227