uuencode.c revision 105519
1/*- 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#ifndef lint 35static const char copyright[] = 36"@(#) Copyright (c) 1983, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38#endif /* not lint */ 39 40#if 0 41#ifndef lint 42static char sccsid[] = "@(#)uuencode.c 8.2 (Berkeley) 4/2/94"; 43#endif /* not lint */ 44#endif 45 46#include <sys/cdefs.h> 47__FBSDID("$FreeBSD: head/usr.bin/uuencode/uuencode.c 105519 2002-10-20 14:18:25Z fanf $"); 48 49/* 50 * uuencode [input] output 51 * 52 * Encode a file so it can be mailed to a remote system. 53 */ 54#include <sys/param.h> 55#include <sys/socket.h> 56#include <sys/stat.h> 57 58#include <netinet/in.h> 59 60#include <err.h> 61#include <libgen.h> 62#include <resolv.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include <unistd.h> 67 68void encode(void); 69void base64_encode(void); 70static void usage(void); 71 72FILE *output; 73int mode; 74char **av; 75 76int 77main(int argc, char *argv[]) 78{ 79 struct stat sb; 80 int base64; 81 char ch; 82 char *outfile; 83 84 base64 = 0; 85 outfile = NULL; 86 87 if (strcmp(basename(argv[0]), "b64encode") == 0) 88 base64 = 1; 89 90 while ((ch = getopt(argc, argv, "mo:")) != -1) { 91 switch (ch) { 92 case 'm': 93 base64 = 1; 94 break; 95 case 'o': 96 outfile = optarg; 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 */ 146void 147base64_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 fprintf(output, "begin-base64 %o %s\n", mode, *av); 161 while ((n = fread(buf, 1, sizeof(buf), stdin))) { 162 ++sequence; 163 rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0]))); 164 if (rv == -1) 165 errx(1, "b64_ntop: error encoding base64"); 166 fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n"); 167 } 168 if (sequence % GROUPS) 169 fprintf(output, "\n"); 170 fprintf(output, "====\n"); 171} 172 173/* 174 * Copy from in to out, encoding as you go along. 175 */ 176void 177encode(void) 178{ 179 register int ch, n; 180 register char *p; 181 char buf[80]; 182 183 (void)fprintf(output, "begin %o %s\n", mode, *av); 184 while ((n = fread(buf, 1, 45, stdin))) { 185 ch = ENC(n); 186 if (fputc(ch, output) == EOF) 187 break; 188 for (p = buf; n > 0; n -= 3, p += 3) { 189 /* Pad with nulls if not a multiple of 3. */ 190 if (n < 3) { 191 p[2] = '\0'; 192 if (n < 2) 193 p[1] = '\0'; 194 } 195 ch = *p >> 2; 196 ch = ENC(ch); 197 if (fputc(ch, output) == EOF) 198 break; 199 ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017); 200 ch = ENC(ch); 201 if (fputc(ch, output) == EOF) 202 break; 203 ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03); 204 ch = ENC(ch); 205 if (fputc(ch, output) == EOF) 206 break; 207 ch = p[2] & 077; 208 ch = ENC(ch); 209 if (fputc(ch, output) == EOF) 210 break; 211 } 212 if (fputc('\n', output) == EOF) 213 break; 214 } 215 if (ferror(stdin)) 216 errx(1, "read error"); 217 (void)fprintf(output, "%c\nend\n", ENC('\0')); 218} 219 220static void 221usage(void) 222{ 223 (void)fprintf(stderr, 224"usage: uuencode [-m] [-o outfile] [infile] remotefile\n" 225" b64encode [-o outfile] [infile] remotefile\n"); 226 exit(1); 227} 228