1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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 #if 0
33 #ifndef lint
34 static const char copyright[] =
35 "@(#) Copyright (c) 1983, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif /* not lint */
38
39 #ifndef lint
40 static char sccsid[] = "@(#)uuencode.c 8.2 (Berkeley) 4/2/94";
41 #endif /* not lint */
42 #endif
43 #include <sys/cdefs.h>
44 /*
45 * uuencode [input] output
46 *
47 * Encode a file so it can be mailed to a remote system.
48 */
49 #include <sys/param.h>
50 #include <sys/socket.h>
51 #include <sys/stat.h>
52
53 #include <netinet/in.h>
54
55 #include <err.h>
56 #include <libgen.h>
57 #include <resolv.h>
58 #include <stdio.h>
59 #include <stdbool.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <unistd.h>
63
64 static void encode(void);
65 static void base64_encode(void);
66 static void usage(void);
67
68 static FILE *output;
69 static int mode;
70 static bool raw;
71 static char **av;
72
73 int
main(int argc,char * argv[])74 main(int argc, char *argv[])
75 {
76 struct stat sb;
77 bool base64;
78 int ch;
79 const char *outfile;
80
81 base64 = false;
82 outfile = NULL;
83
84 if (strcmp(basename(argv[0]), "b64encode") == 0)
85 base64 = 1;
86
87 while ((ch = getopt(argc, argv, "mo:r")) != -1) {
88 switch (ch) {
89 case 'm':
90 base64 = true;
91 break;
92 case 'o':
93 outfile = optarg;
94 break;
95 case 'r':
96 raw = true;
97 break;
98 case '?':
99 default:
100 usage();
101 }
102 }
103 argv += optind;
104 argc -= optind;
105
106 switch (argc) {
107 case 2: /* optional first argument is input file */
108 if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
109 err(1, "%s", *argv);
110 #define RWX (S_IRWXU|S_IRWXG|S_IRWXO)
111 mode = sb.st_mode & RWX;
112 ++argv;
113 break;
114 case 1:
115 #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
116 mode = RW & ~umask(RW);
117 break;
118 case 0:
119 default:
120 usage();
121 }
122
123 av = argv;
124
125 if (outfile != NULL) {
126 output = fopen(outfile, "w+");
127 if (output == NULL)
128 err(1, "unable to open %s for output", outfile);
129 } else
130 output = stdout;
131 if (base64)
132 base64_encode();
133 else
134 encode();
135 if (ferror(output))
136 errx(1, "write error");
137 exit(0);
138 }
139
140 /* ENC is the basic 1 character encoding function to make a char printing */
141 #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
142
143 /*
144 * Copy from in to out, encoding in base64 as you go along.
145 */
146 static void
base64_encode(void)147 base64_encode(void)
148 {
149 /*
150 * Output must fit into 80 columns, chunks come in 4, leave 1.
151 */
152 #define GROUPS ((80 / 4) - 1)
153 unsigned char buf[3];
154 char buf2[sizeof(buf) * 2 + 1];
155 size_t n;
156 int rv, sequence;
157
158 sequence = 0;
159
160 if (!raw)
161 fprintf(output, "begin-base64 %o %s\n", mode, *av);
162 while ((n = fread(buf, 1, sizeof(buf), stdin))) {
163 ++sequence;
164 rv = b64_ntop(buf, n, buf2, nitems(buf2));
165 if (rv == -1)
166 errx(1, "b64_ntop: error encoding base64");
167 fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
168 }
169 if (sequence % GROUPS)
170 fprintf(output, "\n");
171 if (!raw)
172 fprintf(output, "====\n");
173 }
174
175 /*
176 * Copy from in to out, encoding as you go along.
177 */
178 static void
encode(void)179 encode(void)
180 {
181 int ch, n;
182 char *p;
183 char buf[80];
184
185 if (!raw)
186 (void)fprintf(output, "begin %o %s\n", mode, *av);
187 while ((n = fread(buf, 1, 45, stdin))) {
188 ch = ENC(n);
189 if (fputc(ch, output) == EOF)
190 break;
191 for (p = buf; n > 0; n -= 3, p += 3) {
192 /* Pad with nulls if not a multiple of 3. */
193 if (n < 3) {
194 p[2] = '\0';
195 if (n < 2)
196 p[1] = '\0';
197 }
198 ch = *p >> 2;
199 ch = ENC(ch);
200 if (fputc(ch, output) == EOF)
201 break;
202 ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
203 ch = ENC(ch);
204 if (fputc(ch, output) == EOF)
205 break;
206 ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
207 ch = ENC(ch);
208 if (fputc(ch, output) == EOF)
209 break;
210 ch = p[2] & 077;
211 ch = ENC(ch);
212 if (fputc(ch, output) == EOF)
213 break;
214 }
215 if (fputc('\n', output) == EOF)
216 break;
217 }
218 if (ferror(stdin))
219 errx(1, "read error");
220 if (!raw)
221 (void)fprintf(output, "%c\nend\n", ENC('\0'));
222 }
223
224 static void
usage(void)225 usage(void)
226 {
227 (void)fprintf(stderr,
228 "usage: uuencode [-m] [-o outfile] [infile] remotefile\n"
229 " b64encode [-o outfile] [infile] remotefile\n");
230 exit(1);
231 }
232