uuencode.c revision 1.11 
1/*	$NetBSD: uuencode.c,v 1.11 2005/06/29 20:35:48 wiz Exp $	*/
2
3/*-
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
35	The Regents of the University of California.  All rights reserved.\n");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
41#else
42__RCSID("$NetBSD: uuencode.c,v 1.11 2005/06/29 20:35:48 wiz Exp $");
43#endif
44#endif /* not lint */
45
46/*
47 * uuencode [input] output
48 *
49 * Encode a file so it can be mailed to a remote system.
50 */
51#include <sys/types.h>
52#include <sys/stat.h>
53#include <err.h>
54#include <errno.h>
55#include <locale.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60
61int main(int, char *[]);
62static void encode(void);
63static void usage(void);
64
65int
66main(int argc, char *argv[])
67{
68	struct stat sb;
69	int mode;
70
71	mode = 0;
72	setlocale(LC_ALL, "");
73	setprogname(argv[0]);
74
75	while (getopt(argc, argv, "") != -1)
76		usage();
77	argv += optind;
78	argc -= optind;
79
80	switch(argc) {
81	case 2:			/* optional first argument is input file */
82		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
83			err(1, "%s", *argv);
84#define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
85		mode = sb.st_mode & RWX;
86		++argv;
87		break;
88	case 1:
89#define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
90		mode = RW & ~umask(RW);
91		break;
92	case 0:
93	default:
94		usage();
95	}
96
97	(void)printf("begin %o %s\n", mode, *argv);
98	encode();
99	(void)printf("end\n");
100	if (ferror(stdout))
101		err(1, "write error");
102	exit(0);
103}
104
105/* ENC is the basic 1 character encoding function to make a char printing */
106#define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
107
108/*
109 * copy from in to out, encoding as you go along.
110 */
111static void
112encode(void)
113{
114	int ch, n;
115	char *p;
116	char buf[80];
117
118	while ((n = fread(buf, 1, 45, stdin)) > 0) {
119		ch = ENC(n);
120		if (putchar(ch) == EOF)
121			break;
122		for (p = buf; n > 0; n -= 3, p += 3) {
123			ch = *p >> 2;
124			ch = ENC(ch);
125			if (putchar(ch) == EOF)
126				break;
127			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
128			ch = ENC(ch);
129			if (putchar(ch) == EOF)
130				break;
131			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
132			ch = ENC(ch);
133			if (putchar(ch) == EOF)
134				break;
135			ch = p[2] & 077;
136			ch = ENC(ch);
137			if (putchar(ch) == EOF)
138				break;
139		}
140		if (putchar('\n') == EOF)
141			break;
142	}
143	if (ferror(stdin))
144		err(1, "read error.");
145	ch = ENC('\0');
146	(void)putchar(ch);
147	(void)putchar('\n');
148}
149
150static void
151usage(void)
152{
153	(void)fprintf(stderr, "usage: %s [infile] remotefile\n",
154		      getprogname());
155	exit(1);
156}
157