1 /* $NetBSD: uuencode.c,v 1.17 2019/03/04 05:37:08 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1983, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)uuencode.c 8.2 (Berkeley) 4/2/94"; 41 #else 42 __RCSID("$NetBSD: uuencode.c,v 1.17 2019/03/04 05:37:08 rin Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * uuencode [input] output 48 * 49 * Encode a file so it can be mailed to a remote system. 50 */ 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 #include <netinet/in.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <locale.h> 57 #include <resolv.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 static void encode(void); 64 static void base64_encode(void); 65 __dead static void usage(void); 66 67 int 68 main(int argc, char *argv[]) 69 { 70 struct stat sb; 71 int base64, ch, mode; 72 73 mode = 0; 74 base64 = 0; 75 setlocale(LC_ALL, ""); 76 setprogname(argv[0]); 77 78 while ((ch = getopt(argc, argv, "m")) != -1) { 79 switch(ch) { 80 case 'm': 81 base64 = 1; 82 break; 83 default: 84 usage(); 85 } 86 } 87 argv += optind; 88 argc -= optind; 89 90 switch(argc) { 91 case 2: /* optional first argument is input file */ 92 if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) 93 err(1, "%s", *argv); 94 #define RWX (S_IRWXU|S_IRWXG|S_IRWXO) 95 mode = sb.st_mode & RWX; 96 ++argv; 97 break; 98 case 1: 99 #define RW (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) 100 mode = RW & ~umask(RW); 101 break; 102 case 0: 103 default: 104 usage(); 105 } 106 107 if (base64) { 108 (void)printf("begin-base64 %o %s\n", mode, *argv); 109 base64_encode(); 110 (void)printf("====\n"); 111 } else { 112 (void)printf("begin %o %s\n", mode, *argv); 113 encode(); 114 (void)printf("end\n"); 115 } 116 117 if (ferror(stdout)) 118 err(1, "write error"); 119 exit(0); 120 } 121 122 /* ENC is the basic 1 character encoding function to make a char printing */ 123 #define ENC(c) ((c) ? ((c) & 077) + ' ': '`') 124 125 /* 126 * copy from in to out, encoding in base64 as you go along. 127 */ 128 static void 129 base64_encode(void) 130 { 131 /* 132 * Output must fit into 80 columns, chunks come in 4, leave 1. 133 */ 134 #define GROUPS ((70 / 4) - 1) 135 unsigned char buf[3]; 136 char buf2[sizeof(buf) * 2 + 1]; 137 size_t n; 138 int rv, sequence; 139 140 sequence = 0; 141 142 while ((n = fread(buf, 1, sizeof(buf), stdin))) { 143 ++sequence; 144 rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0]))); 145 if (rv == -1) 146 errx(1, "b64_ntop: error encoding base64"); 147 printf("%s%s", buf2, (sequence % GROUPS) ? "" : "\n"); 148 } 149 if (sequence % GROUPS) 150 printf("\n"); 151 } 152 153 /* 154 * copy from in to out, encoding as you go along. 155 */ 156 static void 157 encode(void) 158 { 159 int ch, n; 160 char *p; 161 char buf[80]; 162 163 while ((n = fread(buf, 1, 45, stdin)) > 0) { 164 ch = ENC(n); 165 if (putchar(ch) == EOF) 166 break; 167 for (p = buf; n > 0; n -= 3, p += 3) { 168 /* Pad with nulls if not a multiple of 3. */ 169 if (n < 3) { 170 p[2] = '\0'; 171 if (n < 2) 172 p[1] = '\0'; 173 } 174 ch = *p >> 2; 175 ch = ENC(ch); 176 if (putchar(ch) == EOF) 177 break; 178 ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017); 179 ch = ENC(ch); 180 if (putchar(ch) == EOF) 181 break; 182 ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03); 183 ch = ENC(ch); 184 if (putchar(ch) == EOF) 185 break; 186 ch = p[2] & 077; 187 ch = ENC(ch); 188 if (putchar(ch) == EOF) 189 break; 190 } 191 if (putchar('\n') == EOF) 192 break; 193 } 194 if (ferror(stdin)) 195 err(1, "read error."); 196 ch = ENC('\0'); 197 (void)putchar(ch); 198 (void)putchar('\n'); 199 } 200 201 static void 202 usage(void) 203 { 204 (void)fprintf(stderr, 205 "usage: %s [-m] [inputfile] headername > encodedfile\n", 206 getprogname()); 207 exit(1); 208 } 209
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