uuencode.c revision 1.4 
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 1.4 1993/10/13 18:34:49 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 <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <errno.h>
48#include <sys/types.h>
49#include <sys/stat.h>
50#include <unistd.h>
51
52static void encode();
53static void usage();
54
55int
56main(argc, argv)
57	int argc;
58	char **argv;
59{
60	struct stat sb;
61	int mode;
62
63	while (getopt(argc, argv, "") != EOF)
64		usage();
65	argv += optind;
66	argc -= optind;
67
68	switch(argc) {
69	case 2:			/* optional first argument is input file */
70		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
71			(void)fprintf(stderr, "uuencode: %s: %s.\n",
72			    *argv, strerror(errno));
73			exit(1);
74		}
75#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
76		mode = sb.st_mode & RWX;
77		++argv;
78		break;
79	case 1:
80#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
81		mode = RW & ~umask(RW);
82		break;
83	case 0:
84	default:
85		usage();
86	}
87
88	(void)printf("begin %o %s\n", mode, *argv);
89	encode();
90	(void)printf("end\n");
91	if (ferror(stdout)) {
92		(void)fprintf(stderr, "uuencode: write error.\n");
93		exit(1);
94	}
95	exit(0);
96}
97
98/* ENC is the basic 1 character encoding function to make a char printing */
99#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
100
101/*
102 * copy from in to out, encoding as you go along.
103 */
104static void
105encode()
106{
107	register int ch, n;
108	register char *p;
109	char buf[80];
110
111	while (n = fread(buf, 1, 45, stdin)) {
112		ch = ENC(n);
113		if (putchar(ch) == EOF)
114			break;
115		for (p = buf; n > 0; n -= 3, p += 3) {
116			ch = *p >> 2;
117			ch = ENC(ch);
118			if (putchar(ch) == EOF)
119				break;
120			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
121			ch = ENC(ch);
122			if (putchar(ch) == EOF)
123				break;
124			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
125			ch = ENC(ch);
126			if (putchar(ch) == EOF)
127				break;
128			ch = p[2] & 077;
129			ch = ENC(ch);
130			if (putchar(ch) == EOF)
131				break;
132		}
133		if (putchar('\n') == EOF)
134			break;
135	}
136	if (ferror(stdin)) {
137		(void)fprintf(stderr, "uuencode: read error.\n");
138		exit(1);
139	}
140	ch = ENC('\0');
141	(void)putchar(ch);
142	(void)putchar('\n');
143}
144
145static void
146usage()
147{
148	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
149	exit(1);
150}
151