Annotation of src/usr.bin/uuencode/uuencode.c, Revision 1.13
1.13 ! deraadt 1: /* $OpenBSD: uuencode.c,v 1.12 2015/10/07 06:00:33 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;
1.12 deraadt 100:
101: if (argc == 2 || outfile) {
1.13 ! deraadt 102: if (pledge("stdio rpath wpath cpath", NULL) == -1)
! 103: err(1, "pledge");
1.12 deraadt 104: } else {
1.13 ! deraadt 105: if (pledge("stdio", NULL) == -1)
! 106: err(1, "pledge");
1.12 deraadt 107: }
1.1 deraadt 108:
109: switch(argc) {
110: case 2: /* optional first argument is input file */
1.7 millert 111: if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
112: err(1, "%s", *argv);
1.1 deraadt 113: #define RWX (S_IRWXU|S_IRWXG|S_IRWXO)
114: mode = sb.st_mode & RWX;
115: ++argv;
116: break;
117: case 1:
118: #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
119: mode = RW & ~umask(RW);
120: break;
121: case 0:
122: default:
1.9 sobrado 123: usage();
1.1 deraadt 124: }
125:
1.7 millert 126: av = argv;
127:
128: if (outfile != NULL) {
129: output = fopen(outfile, "w+");
130: if (output == NULL)
131: err(1, "unable to open %s for output", outfile);
132: } else
133: output = stdout;
134: if (base64)
135: base64_encode();
136: else
137: encode();
138: if (ferror(output))
139: errx(1, "write error");
1.1 deraadt 140: exit(0);
141: }
142:
143: /* ENC is the basic 1 character encoding function to make a char printing */
144: #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
145:
146: /*
1.7 millert 147: * Copy from in to out, encoding in base64 as you go along.
148: */
149: void
150: base64_encode(void)
151: {
152: /*
153: * Output must fit into 80 columns, chunks come in 4, leave 1.
154: */
155: #define GROUPS ((80 / 4) - 1)
156: unsigned char buf[3];
157: char buf2[sizeof(buf) * 2 + 1];
158: size_t n;
159: int rv, sequence;
160:
161: sequence = 0;
162:
163: fprintf(output, "begin-base64 %o %s\n", mode, *av);
164: while ((n = fread(buf, 1, sizeof(buf), stdin))) {
165: ++sequence;
166: rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
167: if (rv == -1)
168: errx(1, "b64_ntop: error encoding base64");
169: fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
170: }
171: if (sequence % GROUPS)
172: fprintf(output, "\n");
173: fprintf(output, "====\n");
174: }
175:
176: /*
177: * Copy from in to out, encoding as you go along.
1.1 deraadt 178: */
1.7 millert 179: void
1.6 deraadt 180: encode(void)
1.1 deraadt 181: {
1.4 mpech 182: int ch, n;
183: char *p;
1.1 deraadt 184: char buf[80];
185:
1.7 millert 186: (void)fprintf(output, "begin %o %s\n", mode, *av);
1.3 deraadt 187: while ((n = fread(buf, 1, 45, stdin))) {
1.1 deraadt 188: ch = ENC(n);
1.7 millert 189: if (fputc(ch, output) == EOF)
1.1 deraadt 190: break;
191: for (p = buf; n > 0; n -= 3, p += 3) {
1.7 millert 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: }
1.1 deraadt 198: ch = *p >> 2;
199: ch = ENC(ch);
1.7 millert 200: if (fputc(ch, output) == EOF)
1.1 deraadt 201: break;
1.7 millert 202: ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
1.1 deraadt 203: ch = ENC(ch);
1.7 millert 204: if (fputc(ch, output) == EOF)
1.1 deraadt 205: break;
1.7 millert 206: ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
1.1 deraadt 207: ch = ENC(ch);
1.7 millert 208: if (fputc(ch, output) == EOF)
1.1 deraadt 209: break;
210: ch = p[2] & 077;
211: ch = ENC(ch);
1.7 millert 212: if (fputc(ch, output) == EOF)
1.1 deraadt 213: break;
214: }
1.7 millert 215: if (fputc('\n', output) == EOF)
1.1 deraadt 216: break;
217: }
1.7 millert 218: if (ferror(stdin))
219: errx(1, "read error");
220: (void)fprintf(output, "%c\nend\n", ENC('\0'));
1.1 deraadt 221: }
222:
223: static void
1.9 sobrado 224: usage(void)
1.1 deraadt 225: {
1.9 sobrado 226: switch (pmode) {
1.8 sobrado 227: case MODE_ENCODE:
228: (void)fprintf(stderr,
229: "usage: uuencode [-m] [-o output_file] [file] name\n");
230: break;
231: case MODE_B64ENCODE:
232: (void)fprintf(stderr,
233: "usage: b64encode [-o output_file] [file] name\n");
234: break;
235: }
1.1 deraadt 236: exit(1);
237: }
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