Annotation of src/usr.bin/uuencode/uuencode.c, Revision 1.10
1.10 ! deraadt 1: /* $OpenBSD: uuencode.c,v 1.9 2008/07/29 18:25:28 sobrado Exp $ */
1.7 millert 2: /* $FreeBSD: uuencode.c,v 1.18 2004/01/22 07:23:35 grehan Exp $ */
1.1 deraadt 3:
4: /*-
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.5 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: /*
34: * Encode a file so it can be mailed to a remote system.
35: */
1.7 millert 36:
37: #include <sys/param.h>
38: #include <sys/socket.h>
39: #include <sys/stat.h>
40:
41: #include <netinet/in.h>
42:
43: #include <err.h>
44: #include <locale.h>
45: #include <resolv.h>
1.1 deraadt 46: #include <stdio.h>
47: #include <stdlib.h>
48: #include <string.h>
49: #include <unistd.h>
50:
1.7 millert 51: void encode(void);
52: void base64_encode(void);
1.9 sobrado 53: static void usage(void);
1.7 millert 54:
55: FILE *output;
56: int mode;
57: char **av;
1.1 deraadt 58:
1.9 sobrado 59: enum program_mode {
60: MODE_ENCODE,
61: MODE_B64ENCODE
62: } pmode;
1.8 sobrado 63:
1.1 deraadt 64: int
1.6 deraadt 65: main(int argc, char *argv[])
1.1 deraadt 66: {
67: struct stat sb;
1.9 sobrado 68: int base64, ch;
1.7 millert 69: char *outfile;
70: extern char *__progname;
1.8 sobrado 71: static const char *optstr[2] = {
72: "mo:",
73: "o:"
74: };
1.7 millert 75:
1.9 sobrado 76: base64 = 0;
1.7 millert 77: outfile = NULL;
78:
1.9 sobrado 79: pmode = MODE_ENCODE;
1.8 sobrado 80: if (strcmp(__progname, "b64encode") == 0) {
1.7 millert 81: base64 = 1;
1.9 sobrado 82: pmode = MODE_B64ENCODE;
1.8 sobrado 83: }
1.1 deraadt 84:
85: setlocale(LC_ALL, "");
1.9 sobrado 86: while ((ch = getopt(argc, argv, optstr[pmode])) != -1) {
1.7 millert 87: switch (ch) {
88: case 'm':
89: base64 = 1;
90: break;
91: case 'o':
92: outfile = optarg;
93: break;
94: case '?':
95: default:
1.9 sobrado 96: usage();
1.7 millert 97: }
98: }
1.1 deraadt 99: argv += optind;
100: argc -= optind;
101:
102: switch(argc) {
103: case 2: /* optional first argument is input file */
1.7 millert 104: if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
105: err(1, "%s", *argv);
1.1 deraadt 106: #define RWX (S_IRWXU|S_IRWXG|S_IRWXO)
107: mode = sb.st_mode & RWX;
108: ++argv;
109: break;
110: case 1:
111: #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
112: mode = RW & ~umask(RW);
113: break;
114: case 0:
115: default:
1.9 sobrado 116: usage();
1.1 deraadt 117: }
118:
1.7 millert 119: av = argv;
120:
121: if (outfile != NULL) {
122: output = fopen(outfile, "w+");
123: if (output == NULL)
124: err(1, "unable to open %s for output", outfile);
125: } else
126: output = stdout;
127: if (base64)
128: base64_encode();
129: else
130: encode();
131: if (ferror(output))
132: errx(1, "write error");
1.1 deraadt 133: exit(0);
134: }
135:
136: /* ENC is the basic 1 character encoding function to make a char printing */
137: #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
138:
139: /*
1.7 millert 140: * Copy from in to out, encoding in base64 as you go along.
141: */
142: void
143: base64_encode(void)
144: {
145: /*
146: * Output must fit into 80 columns, chunks come in 4, leave 1.
147: */
148: #define GROUPS ((80 / 4) - 1)
149: unsigned char buf[3];
150: char buf2[sizeof(buf) * 2 + 1];
151: size_t n;
152: int rv, sequence;
153:
154: sequence = 0;
155:
156: fprintf(output, "begin-base64 %o %s\n", mode, *av);
157: while ((n = fread(buf, 1, sizeof(buf), stdin))) {
158: ++sequence;
159: rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
160: if (rv == -1)
161: errx(1, "b64_ntop: error encoding base64");
162: fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
163: }
164: if (sequence % GROUPS)
165: fprintf(output, "\n");
166: fprintf(output, "====\n");
167: }
168:
169: /*
170: * Copy from in to out, encoding as you go along.
1.1 deraadt 171: */
1.7 millert 172: void
1.6 deraadt 173: encode(void)
1.1 deraadt 174: {
1.4 mpech 175: int ch, n;
176: char *p;
1.1 deraadt 177: char buf[80];
178:
1.7 millert 179: (void)fprintf(output, "begin %o %s\n", mode, *av);
1.3 deraadt 180: while ((n = fread(buf, 1, 45, stdin))) {
1.1 deraadt 181: ch = ENC(n);
1.7 millert 182: if (fputc(ch, output) == EOF)
1.1 deraadt 183: break;
184: for (p = buf; n > 0; n -= 3, p += 3) {
1.7 millert 185: /* Pad with nulls if not a multiple of 3. */
186: if (n < 3) {
187: p[2] = '\0';
188: if (n < 2)
189: p[1] = '\0';
190: }
1.1 deraadt 191: ch = *p >> 2;
192: ch = ENC(ch);
1.7 millert 193: if (fputc(ch, output) == EOF)
1.1 deraadt 194: break;
1.7 millert 195: ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
1.1 deraadt 196: ch = ENC(ch);
1.7 millert 197: if (fputc(ch, output) == EOF)
1.1 deraadt 198: break;
1.7 millert 199: ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
1.1 deraadt 200: ch = ENC(ch);
1.7 millert 201: if (fputc(ch, output) == EOF)
1.1 deraadt 202: break;
203: ch = p[2] & 077;
204: ch = ENC(ch);
1.7 millert 205: if (fputc(ch, output) == EOF)
1.1 deraadt 206: break;
207: }
1.7 millert 208: if (fputc('\n', output) == EOF)
1.1 deraadt 209: break;
210: }
1.7 millert 211: if (ferror(stdin))
212: errx(1, "read error");
213: (void)fprintf(output, "%c\nend\n", ENC('\0'));
1.1 deraadt 214: }
215:
216: static void
1.9 sobrado 217: usage(void)
1.1 deraadt 218: {
1.9 sobrado 219: switch (pmode) {
1.8 sobrado 220: case MODE_ENCODE:
221: (void)fprintf(stderr,
222: "usage: uuencode [-m] [-o output_file] [file] name\n");
223: break;
224: case MODE_B64ENCODE:
225: (void)fprintf(stderr,
226: "usage: b64encode [-o output_file] [file] name\n");
227: break;
228: }
1.1 deraadt 229: exit(1);
230: }
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