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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static const char copyright[] =
33"@(#) Copyright (c) 1983, 1993\n\
34	The Regents of the University of California.  All rights reserved.\n";
35#endif /* not lint */
36
37#ifndef lint
38static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
39#endif /* not lint */
40#endif
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD$");
43
44/*
45 * uuencode [input] output
46 *
47 * Encode a file so it can be mailed to a remote system.
48 */
49#include <sys/param.h>
50#include <sys/socket.h>
51#include <sys/stat.h>
52
53#include <netinet/in.h>
54
55#include <err.h>
56#include <libgen.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);
65static void usage(void);
66
67static FILE *output;
68static int mode;
69static char **av;
70
71int
72main(int argc, char *argv[])
73{
74	struct stat sb;
75	int base64;
76	int ch;
77	char *outfile;
78
79	base64 = 0;
80	outfile = NULL;
81
82	if (strcmp(basename(argv[0]), "b64encode") == 0)
83		base64 = 1;
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 */
141static void
142base64_encode(void)
143{
144	/*
145	 * Output must fit into 80 columns, chunks come in 4, leave 1.
146	 */
147#define	GROUPS	((80 / 4) - 1)
148	unsigned char buf[3];
149	char buf2[sizeof(buf) * 2 + 1];
150	size_t n;
151	int rv, sequence;
152
153	sequence = 0;
154
155	fprintf(output, "begin-base64 %o %s\n", mode, *av);
156	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
157		++sequence;
158		rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
159		if (rv == -1)
160			errx(1, "b64_ntop: error encoding base64");
161		fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
162	}
163	if (sequence % GROUPS)
164		fprintf(output, "\n");
165	fprintf(output, "====\n");
166}
167
168/*
169 * Copy from in to out, encoding as you go along.
170 */
171static void
172encode(void)
173{
174	register int ch, n;
175	register char *p;
176	char buf[80];
177
178	(void)fprintf(output, "begin %o %s\n", mode, *av);
179	while ((n = fread(buf, 1, 45, stdin))) {
180		ch = ENC(n);
181		if (fputc(ch, output) == EOF)
182			break;
183		for (p = buf; n > 0; n -= 3, p += 3) {
184			/* Pad with nulls if not a multiple of 3. */
185			if (n < 3) {
186				p[2] = '\0';
187				if (n < 2)
188					p[1] = '\0';
189			}
190			ch = *p >> 2;
191			ch = ENC(ch);
192			if (fputc(ch, output) == EOF)
193				break;
194			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
195			ch = ENC(ch);
196			if (fputc(ch, output) == EOF)
197				break;
198			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
199			ch = ENC(ch);
200			if (fputc(ch, output) == EOF)
201				break;
202			ch = p[2] & 077;
203			ch = ENC(ch);
204			if (fputc(ch, output) == EOF)
205				break;
206		}
207		if (fputc('\n', output) == EOF)
208			break;
209	}
210	if (ferror(stdin))
211		errx(1, "read error");
212	(void)fprintf(output, "%c\nend\n", ENC('\0'));
213}
214
215static void
216usage(void)
217{
218	(void)fprintf(stderr,
219"usage: uuencode [-m] [-o outfile] [infile] remotefile\n"
220"       b64encode [-o outfile] [infile] remotefile\n");
221	exit(1);
222}
223