usr.bin/uuencode/uuencode.c

   1 /*      $NetBSD: uuencode.c,v 1.13 2008/07/21 14:19:27 lukem 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 1.13 2008/07/21 14:19:27 lukem 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 int main(int, char *[]);
  64 static void encode(void);
  65 static void base64_encode(void);
  66 static void usage(void);
  67
  68 int
  69 main(int argc, char *argv[])
  70 {
  71         struct stat sb;
  72         int base64, ch, mode;
  73
  74         mode = 0;
  75         base64 = 0;
  76         setlocale(LC_ALL, "");
  77         setprogname(argv[0]);
  78
  79         while ((ch = getopt(argc, argv, "m")) != -1) {
  80                 switch(ch) {
  81                 case 'm':
  82                         base64 = 1;
  83                         break;
  84                 default:
  85                         usage();
  86                 }
  87         }
  88         argv += optind;
  89         argc -= optind;
  90
  91         switch(argc) {
  92         case 2:                 /* optional first argument is input file */
  93                 if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
  94                         err(1, "%s", *argv);
  95 #define RWX     (S_IRWXU|S_IRWXG|S_IRWXO)
  96                 mode = sb.st_mode & RWX;
  97                 ++argv;
  98                 break;
  99         case 1:
 100 #define RW      (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
 101                 mode = RW & ~umask(RW);
 102                 break;
 103         case 0:
 104         default:
 105                 usage();
 106         }
 107
 108         if (base64) {
 109                 (void)printf("begin-base64 %o %s\n", mode, *argv);
 110                 base64_encode();
 111                 (void)printf("====\n");
 112         } else {
 113                 (void)printf("begin %o %s\n", mode, *argv);
 114                 encode();
 115                 (void)printf("end\n");
 116         }
 117
 118         if (ferror(stdout))
 119                 err(1, "write error");
 120         exit(0);
 121 }
 122
 123 /* ENC is the basic 1 character encoding function to make a char printing */
 124 #define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
 125
 126 /*
 127  * copy from in to out, encoding in base64 as you go along.
 128  */
 129 static void
 130 base64_encode(void)
 131 {
 132         /*
 133          * Output must fit into 80 columns, chunks come in 4, leave 1.
 134          */
 135 #define GROUPS  ((70 / 4) - 1)
 136         unsigned char buf[3];
 137         char buf2[sizeof(buf) * 2 + 1];
 138         size_t n;
 139         int rv, sequence;
 140
 141         sequence = 0;
 142
 143         while ((n = fread(buf, 1, sizeof(buf), stdin))) {
 144                 ++sequence;
 145                 rv = b64_ntop(buf, n, buf2, (sizeof(buf2) / sizeof(buf2[0])));
 146                 if (rv == -1)
 147                         errx(1, "b64_ntop: error encoding base64");
 148                 printf("%s%s", buf2, (sequence % GROUPS) ? "" : "\n");
 149         }
 150         if (sequence % GROUPS)
 151                 printf("\n");
 152 }
 153
 154 /*
 155  * copy from in to out, encoding as you go along.
 156  */
 157 static void
 158 encode(void)
 159 {
 160         int ch, n;
 161         char *p;
 162         char buf[80];
 163
 164         while ((n = fread(buf, 1, 45, stdin)) > 0) {
 165                 ch = ENC(n);
 166                 if (putchar(ch) == EOF)
 167                         break;
 168                 for (p = buf; n > 0; n -= 3, p += 3) {
 169                         ch = *p >> 2;
 170                         ch = ENC(ch);
 171                         if (putchar(ch) == EOF)
 172                                 break;
 173                         ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
 174                         ch = ENC(ch);
 175                         if (putchar(ch) == EOF)
 176                                 break;
 177                         ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
 178                         ch = ENC(ch);
 179                         if (putchar(ch) == EOF)
 180                                 break;
 181                         ch = p[2] & 077;
 182                         ch = ENC(ch);
 183                         if (putchar(ch) == EOF)
 184                                 break;
 185                 }
 186                 if (putchar('\n') == EOF)
 187                         break;
 188         }
 189         if (ferror(stdin))
 190                 err(1, "read error.");
 191         ch = ENC('\0');
 192         (void)putchar(ch);
 193         (void)putchar('\n');
 194 }
 195
 196 static void
 197 usage(void)
 198 {
 199         (void)fprintf(stderr, "usage: %s [-m] [inputfile] outputname\n",
 200                       getprogname());
 201         exit(1);
 202 }