1 /* $OpenBSD: uuencode.c,v 1.9 2008/07/29 18:25:28 sobrado Exp $ */ 2 /* $FreeBSD: uuencode.c,v 1.18 2004/01/22 07:23:35 grehan Exp $ */ 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. 16 * 3. Neither the name of the University nor the names of its contributors 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 #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 #if 0 41 static const char sccsid[] = "@(#)uuencode.c 8.2 (Berkeley) 4/2/94"; 42 #endif 43 static const char rcsid[] = "$OpenBSD: uuencode.c,v 1.9 2008/07/29 18:25:28 sobrado Exp $"; 44 #endif /* not lint */ 45 46 /* 47 * Encode a file so it can be mailed to a remote system. 48 */ 49 50 #include <sys/param.h> 51 #include <sys/socket.h> 52 #include <sys/stat.h> 53 54 #include <netinet/in.h> 55 56 #include <err.h> 57 #include <locale.h> 58 #include <resolv.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 void encode(void); 65 void base64_encode(void); 66 static void usage(void); 67 68 FILE *output; 69 int mode; 70 char **av; 71 72 enum program_mode { 73 MODE_ENCODE, 74 MODE_B64ENCODE 75 } pmode; 76 77 int 78 main(int argc, char *argv[]) 79 { 80 struct stat sb; 81 int base64, ch; 82 char *outfile; 83 extern char *__progname; 84 static const char *optstr[2] = { 85 "mo:", 86 "o:" 87 }; 88 89 base64 = 0; 90 outfile = NULL; 91 92 pmode = MODE_ENCODE; 93 if (strcmp(__progname, "b64encode") == 0) { 94 base64 = 1; 95 pmode = MODE_B64ENCODE; 96 } 97 98 setlocale(LC_ALL, ""); 99 while ((ch = getopt(argc, argv, optstr[pmode])) != -1) { 100 switch (ch) { 101 case 'm': 102 base64 = 1; 103 break; 104 case 'o': 105 outfile = optarg; 106 break; 107 case '?': 108 default: 109 usage(); 110 } 111 } 112 argv += optind; 113 argc -= optind; 114 115 switch(argc) { 116 case 2: /* optional first argument is input file */ 117 if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) 118 err(1, "%s", *argv); 119 #define RWX (S_IRWXU|S_IRWXG|S_IRWXO) 120 mode = sb.st_mode & RWX; 121 ++argv; 122 break; 123 case 1: 124 #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) 125 mode = RW & ~umask(RW); 126 break; 127 case 0: 128 default: 129 usage(); 130 } 131 132 av = argv; 133 134 if (outfile != NULL) { 135 output = fopen(outfile, "w+"); 136 if (output == NULL) 137 err(1, "unable to open %s for output", outfile); 138 } else 139 output = stdout; 140 if (base64) 141 base64_encode(); 142 else 143 encode(); 144 if (ferror(output)) 145 errx(1, "write error"); 146 exit(0); 147 } 148 149 /* ENC is the basic 1 character encoding function to make a char printing */ 150 #define ENC(c) ((c) ? ((c) & 077) + ' ': '`') 151 152 /* 153 * Copy from in to out, encoding in base64 as you go along. 154 */ 155 void 156 base64_encode(void) 157 { 158 /* 159 * Output must fit into 80 columns, chunks come in 4, leave 1. 160 */ 161 #define GROUPS ((80 / 4) - 1) 162 unsigned char buf[3]; 163 char buf2[sizeof(buf) * 2 + 1]; 164 size_t n; 165 int rv, sequence; 166 167 sequence = 0; 168 169 fprintf(output, "begin-base64 %o %s\n", mode, *av); 170 while ((n = fread(buf, 1, sizeof(buf), stdin))) { 171 ++sequence; 172 rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0]))); 173 if (rv == -1) 174 errx(1, "b64_ntop: error encoding base64"); 175 fprintf(output, "%s%s", buf2, (sequence % GROUPS) ? "" : "\n"); 176 } 177 if (sequence % GROUPS) 178 fprintf(output, "\n"); 179 fprintf(output, "====\n"); 180 } 181 182 /* 183 * Copy from in to out, encoding as you go along. 184 */ 185 void 186 encode(void) 187 { 188 int ch, n; 189 char *p; 190 char buf[80]; 191 192 (void)fprintf(output, "begin %o %s\n", mode, *av); 193 while ((n = fread(buf, 1, 45, stdin))) { 194 ch = ENC(n); 195 if (fputc(ch, output) == EOF) 196 break; 197 for (p = buf; n > 0; n -= 3, p += 3) { 198 /* Pad with nulls if not a multiple of 3. */ 199 if (n < 3) { 200 p[2] = '\0'; 201 if (n < 2) 202 p[1] = '\0'; 203 } 204 ch = *p >> 2; 205 ch = ENC(ch); 206 if (fputc(ch, output) == EOF) 207 break; 208 ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017); 209 ch = ENC(ch); 210 if (fputc(ch, output) == EOF) 211 break; 212 ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03); 213 ch = ENC(ch); 214 if (fputc(ch, output) == EOF) 215 break; 216 ch = p[2] & 077; 217 ch = ENC(ch); 218 if (fputc(ch, output) == EOF) 219 break; 220 } 221 if (fputc('\n', output) == EOF) 222 break; 223 } 224 if (ferror(stdin)) 225 errx(1, "read error"); 226 (void)fprintf(output, "%c\nend\n", ENC('\0')); 227 } 228 229 static void 230 usage(void) 231 { 232 switch (pmode) { 233 case MODE_ENCODE: 234 (void)fprintf(stderr, 235 "usage: uuencode [-m] [-o output_file] [file] name\n"); 236 break; 237 case MODE_B64ENCODE: 238 (void)fprintf(stderr, 239 "usage: b64encode [-o output_file] [file] name\n"); 240 break; 241 } 242 exit(1); 243 } 244