uuencode.c revision 78387 
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 78387 2001-06-17 06:22:30Z 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 <unistd.h>
59
60void encode __P((void));
61static void usage __P((void));
62
63int
64main(argc, argv)
65	int argc;
66	char *argv[];
67{
68	struct stat sb;
69	int mode;
70
71	while (getopt(argc, argv, "") != -1)
72		usage();
73	argv += optind;
74	argc -= optind;
75
76	switch(argc) {
77	case 2:			/* optional first argument is input file */
78		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
79			err(1, "%s", *argv);
80#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
81		mode = sb.st_mode & RWX;
82		++argv;
83		break;
84	case 1:
85#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
86		mode = RW & ~umask(RW);
87		break;
88	case 0:
89	default:
90		usage();
91	}
92
93	(void)printf("begin %o %s\n", mode, *argv);
94	encode();
95	(void)printf("end\n");
96	if (ferror(stdout))
97		errx(1, "write error");
98	exit(0);
99}
100
101/* ENC is the basic 1 character encoding function to make a char printing */
102#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
103
104/*
105 * copy from in to out, encoding as you go along.
106 */
107void
108encode()
109{
110	register int ch, n;
111	register char *p;
112	char buf[80];
113
114	while ((n = fread(buf, 1, 45, stdin))) {
115		ch = ENC(n);
116		if (putchar(ch) == EOF)
117			break;
118		for (p = buf; n > 0; n -= 3, p += 3) {
119			ch = *p >> 2;
120			ch = ENC(ch);
121			if (putchar(ch) == EOF)
122				break;
123			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
124			ch = ENC(ch);
125			if (putchar(ch) == EOF)
126				break;
127			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
128			ch = ENC(ch);
129			if (putchar(ch) == EOF)
130				break;
131			ch = p[2] & 077;
132			ch = ENC(ch);
133			if (putchar(ch) == EOF)
134				break;
135		}
136		if (putchar('\n') == EOF)
137			break;
138	}
139	if (ferror(stdin))
140		errx(1, "read error");
141	ch = ENC('\0');
142	(void)putchar(ch);
143	(void)putchar('\n');
144}
145
146static void
147usage()
148{
149	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
150	exit(1);
151}
152