uuencode.c revision 78718 
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 78718 2001-06-24 19:50:42Z dd $";
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/types.h>
54#include <sys/stat.h>
55
56#include <err.h>
57#include <stdio.h>
58#include <stdlib.h>
59#include <unistd.h>
60
61void encode __P((void));
62static void usage __P((void));
63
64int
65main(argc, argv)
66	int argc;
67	char *argv[];
68{
69	struct stat sb;
70	int mode;
71
72	while (getopt(argc, argv, "") != -1)
73		usage();
74	argv += optind;
75	argc -= optind;
76
77	switch(argc) {
78	case 2:			/* optional first argument is input file */
79		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
80			err(1, "%s", *argv);
81#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
82		mode = sb.st_mode & RWX;
83		++argv;
84		break;
85	case 1:
86#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
87		mode = RW & ~umask(RW);
88		break;
89	case 0:
90	default:
91		usage();
92	}
93
94	(void)printf("begin %o %s\n", mode, *argv);
95	encode();
96	(void)printf("end\n");
97	if (ferror(stdout))
98		errx(1, "write error");
99	exit(0);
100}
101
102/* ENC is the basic 1 character encoding function to make a char printing */
103#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
104
105/*
106 * copy from in to out, encoding as you go along.
107 */
108void
109encode()
110{
111	register int ch, n;
112	register char *p;
113	char buf[80];
114
115	while ((n = fread(buf, 1, 45, stdin))) {
116		ch = ENC(n);
117		if (putchar(ch) == EOF)
118			break;
119		for (p = buf; n > 0; n -= 3, p += 3) {
120			ch = *p >> 2;
121			ch = ENC(ch);
122			if (putchar(ch) == EOF)
123				break;
124			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
125			ch = ENC(ch);
126			if (putchar(ch) == EOF)
127				break;
128			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
129			ch = ENC(ch);
130			if (putchar(ch) == EOF)
131				break;
132			ch = p[2] & 077;
133			ch = ENC(ch);
134			if (putchar(ch) == EOF)
135				break;
136		}
137		if (putchar('\n') == EOF)
138			break;
139	}
140	if (ferror(stdin))
141		errx(1, "read error");
142	ch = ENC('\0');
143	(void)putchar(ch);
144	(void)putchar('\n');
145}
146
147static void
148usage()
149{
150	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
151	exit(1);
152}
153