uuencode.c revision 1.3 
1/*
2 * Copyright (c) 1983 Regents of the University of California.
3 * 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
35/*static char sccsid[] = "from: @(#)uuencode.c	5.9 (Berkeley) 6/1/90";*/
36static char rcsid[] = "$Id: uuencode.c,v 1.3 1993/08/27 22:30:57 jtc Exp $";
37#endif /* not lint */
38
39/*
40 * uuencode [input] output
41 *
42 * Encode a file so it can be mailed to a remote system.
43 */
44#include <sys/types.h>
45#include <sys/stat.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <errno.h>
50
51static void encode();
52static void usage();
53
54int
55main(argc, argv)
56	int argc;
57	char **argv;
58{
59	struct stat sb;
60	int mode;
61
62	while (getopt(argc, argv, "") != EOF)
63		usage();
64	argv += optind;
65	argc -= optind;
66
67	switch(argc) {
68	case 2:			/* optional first argument is input file */
69		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
70			(void)fprintf(stderr, "uuencode: %s: %s.\n",
71			    *argv, strerror(errno));
72			exit(1);
73		}
74#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
75		mode = sb.st_mode & RWX;
76		++argv;
77		break;
78	case 1:
79#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
80		mode = RW & ~umask(RW);
81		break;
82	case 0:
83	default:
84		usage();
85	}
86
87	(void)printf("begin %o %s\n", mode, *argv);
88	encode();
89	(void)printf("end\n");
90	if (ferror(stdout)) {
91		(void)fprintf(stderr, "uuencode: write error.\n");
92		exit(1);
93	}
94	exit(0);
95}
96
97/* ENC is the basic 1 character encoding function to make a char printing */
98#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
99
100/*
101 * copy from in to out, encoding as you go along.
102 */
103static void
104encode()
105{
106	register int ch, n;
107	register char *p;
108	char buf[80];
109
110	while (n = fread(buf, 1, 45, stdin)) {
111		ch = ENC(n);
112		if (putchar(ch) == EOF)
113			break;
114		for (p = buf; n > 0; n -= 3, p += 3) {
115			ch = *p >> 2;
116			ch = ENC(ch);
117			if (putchar(ch) == EOF)
118				break;
119			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
120			ch = ENC(ch);
121			if (putchar(ch) == EOF)
122				break;
123			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
124			ch = ENC(ch);
125			if (putchar(ch) == EOF)
126				break;
127			ch = p[2] & 077;
128			ch = ENC(ch);
129			if (putchar(ch) == EOF)
130				break;
131		}
132		if (putchar('\n') == EOF)
133			break;
134	}
135	if (ferror(stdin)) {
136		(void)fprintf(stderr, "uuencode: read error.\n");
137		exit(1);
138	}
139	ch = ENC('\0');
140	(void)putchar(ch);
141	(void)putchar('\n');
142}
143
144static void
145usage()
146{
147	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
148	exit(1);
149}
150