Annotation of src/usr.bin/uuencode/uuencode.c, Revision 1.11
1.11 ! deraadt 1: /* $OpenBSD: uuencode.c,v 1.10 2009/10/27 23:59:46 deraadt 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/socket.h>
38: #include <sys/stat.h>
39:
40: #include <netinet/in.h>
41:
42: #include <err.h>
43: #include <locale.h>
44: #include <resolv.h>
1.1 deraadt 45: #include <stdio.h>
46: #include <stdlib.h>
47: #include <string.h>
48: #include <unistd.h>
49:
1.7 millert 50: void encode(void);
51: void base64_encode(void);
1.9 sobrado 52: static void usage(void);
1.7 millert 53:
54: FILE *output;
55: int mode;
56: char **av;
1.1 deraadt 57:
1.9 sobrado 58: enum program_mode {
59: MODE_ENCODE,
60: MODE_B64ENCODE
61: } pmode;
1.8 sobrado 62:
1.1 deraadt 63: int
1.6 deraadt 64: main(int argc, char *argv[])
1.1 deraadt 65: {
66: struct stat sb;
1.9 sobrado 67: int base64, ch;
1.7 millert 68: char *outfile;
69: extern char *__progname;
1.8 sobrado 70: static const char *optstr[2] = {
71: "mo:",
72: "o:"
73: };
1.7 millert 74:
1.9 sobrado 75: base64 = 0;
1.7 millert 76: outfile = NULL;
77:
1.9 sobrado 78: pmode = MODE_ENCODE;
1.8 sobrado 79: if (strcmp(__progname, "b64encode") == 0) {
1.7 millert 80: base64 = 1;
1.9 sobrado 81: pmode = MODE_B64ENCODE;
1.8 sobrado 82: }
1.1 deraadt 83:
84: setlocale(LC_ALL, "");
1.9 sobrado 85: while ((ch = getopt(argc, argv, optstr[pmode])) != -1) {
1.7 millert 86: switch (ch) {
87: case 'm':
88: base64 = 1;
89: break;
90: case 'o':
91: outfile = optarg;
92: break;
93: case '?':
94: default:
1.9 sobrado 95: usage();
1.7 millert 96: }
97: }
1.1 deraadt 98: argv += optind;
99: argc -= optind;
100:
101: switch(argc) {
102: case 2: /* optional first argument is input file */
1.7 millert 103: if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
104: err(1, "%s", *argv);
1.1 deraadt 105: #define RWX (S_IRWXU|S_IRWXG|S_IRWXO)
106: mode = sb.st_mode & RWX;
107: ++argv;
108: break;
109: case 1:
110: #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
111: mode = RW & ~umask(RW);
112: break;
113: case 0:
114: default:
1.9 sobrado 115: usage();
1.1 deraadt 116: }
117:
1.7 millert 118: av = argv;
119:
120: if (outfile != NULL) {
121: output = fopen(outfile, "w+");
122: if (output == NULL)
123: err(1, "unable to open %s for output", outfile);
124: } else
125: output = stdout;
126: if (base64)
127: base64_encode();
128: else
129: encode();
130: if (ferror(output))
131: errx(1, "write error");
1.1 deraadt 132: exit(0);
133: }
134:
135: /* ENC is the basic 1 character encoding function to make a char printing */
136: #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
137:
138: /*
1.7 millert 139: * Copy from in to out, encoding in base64 as you go along.
140: */
141: void
142: base64_encode(void)
143: {
144: /*
145: * Output must fit into 80 columns, chunks come in 4, leave 1.
146: */
147: #define GROUPS ((80 / 4) - 1)
148: unsigned char buf[3];
149: char buf2[sizeof(buf) * 2 + 1];
150: size_t n;
151: int rv, sequence;
152:
153: sequence = 0;
154:
155: fprintf(output, "begin-base64 %o %s\n", mode, *av);
156: while ((n = fread(buf, 1, sizeof(buf), stdin))) {
157: ++sequence;
158: rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
159: if (rv == -1)
160: errx(1, "b64_ntop: error encoding base64");
161: fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
162: }
163: if (sequence % GROUPS)
164: fprintf(output, "\n");
165: fprintf(output, "====\n");
166: }
167:
168: /*
169: * Copy from in to out, encoding as you go along.
1.1 deraadt 170: */
1.7 millert 171: void
1.6 deraadt 172: encode(void)
1.1 deraadt 173: {
1.4 mpech 174: int ch, n;
175: char *p;
1.1 deraadt 176: char buf[80];
177:
1.7 millert 178: (void)fprintf(output, "begin %o %s\n", mode, *av);
1.3 deraadt 179: while ((n = fread(buf, 1, 45, stdin))) {
1.1 deraadt 180: ch = ENC(n);
1.7 millert 181: if (fputc(ch, output) == EOF)
1.1 deraadt 182: break;
183: for (p = buf; n > 0; n -= 3, p += 3) {
1.7 millert 184: /* Pad with nulls if not a multiple of 3. */
185: if (n < 3) {
186: p[2] = '\0';
187: if (n < 2)
188: p[1] = '\0';
189: }
1.1 deraadt 190: ch = *p >> 2;
191: ch = ENC(ch);
1.7 millert 192: if (fputc(ch, output) == EOF)
1.1 deraadt 193: break;
1.7 millert 194: ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
1.1 deraadt 195: ch = ENC(ch);
1.7 millert 196: if (fputc(ch, output) == EOF)
1.1 deraadt 197: break;
1.7 millert 198: ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
1.1 deraadt 199: ch = ENC(ch);
1.7 millert 200: if (fputc(ch, output) == EOF)
1.1 deraadt 201: break;
202: ch = p[2] & 077;
203: ch = ENC(ch);
1.7 millert 204: if (fputc(ch, output) == EOF)
1.1 deraadt 205: break;
206: }
1.7 millert 207: if (fputc('\n', output) == EOF)
1.1 deraadt 208: break;
209: }
1.7 millert 210: if (ferror(stdin))
211: errx(1, "read error");
212: (void)fprintf(output, "%c\nend\n", ENC('\0'));
1.1 deraadt 213: }
214:
215: static void
1.9 sobrado 216: usage(void)
1.1 deraadt 217: {
1.9 sobrado 218: switch (pmode) {
1.8 sobrado 219: case MODE_ENCODE:
220: (void)fprintf(stderr,
221: "usage: uuencode [-m] [-o output_file] [file] name\n");
222: break;
223: case MODE_B64ENCODE:
224: (void)fprintf(stderr,
225: "usage: b64encode [-o output_file] [file] name\n");
226: break;
227: }
1.1 deraadt 228: exit(1);
229: }