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uuencode.c revision 1.10 
      1 /*	$NetBSD: uuencode.c,v 1.10 2005/06/29 20:34:48 wiz 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\n\
     35 	The Regents of the University of California.  All rights reserved.\n");
     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 1.10 2005/06/29 20:34:48 wiz 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 <err.h>
     54 #include <errno.h>
     55 #include <locale.h>
     56 #include <stdio.h>
     57 #include <stdlib.h>
     58 #include <string.h>
     59 #include <unistd.h>
     60 
     61 int main(int, char *[]);
     62 static void encode(void);
     63 static void usage(void);
     64 
     65 int
     66 main(int argc, char *argv[])
     67 {
     68 	struct stat sb;
     69 	int mode;
     70 
     71 	mode = 0;
     72 	setlocale(LC_ALL, "");
     73 
     74 	while (getopt(argc, argv, "") != -1)
     75 		usage();
     76 	argv += optind;
     77 	argc -= optind;
     78 
     79 	switch(argc) {
     80 	case 2:			/* optional first argument is input file */
     81 		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb))
     82 			err(1, "%s", *argv);
     83 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     84 		mode = sb.st_mode & RWX;
     85 		++argv;
     86 		break;
     87 	case 1:
     88 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     89 		mode = RW & ~umask(RW);
     90 		break;
     91 	case 0:
     92 	default:
     93 		usage();
     94 	}
     95 
     96 	(void)printf("begin %o %s\n", mode, *argv);
     97 	encode();
     98 	(void)printf("end\n");
     99 	if (ferror(stdout))
    100 		err(1, "write error");
    101 	exit(0);
    102 }
    103 
    104 /* ENC is the basic 1 character encoding function to make a char printing */
    105 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
    106 
    107 /*
    108  * copy from in to out, encoding as you go along.
    109  */
    110 static void
    111 encode(void)
    112 {
    113 	int ch, n;
    114 	char *p;
    115 	char buf[80];
    116 
    117 	while ((n = fread(buf, 1, 45, stdin)) > 0) {
    118 		ch = ENC(n);
    119 		if (putchar(ch) == EOF)
    120 			break;
    121 		for (p = buf; n > 0; n -= 3, p += 3) {
    122 			ch = *p >> 2;
    123 			ch = ENC(ch);
    124 			if (putchar(ch) == EOF)
    125 				break;
    126 			ch = ((*p << 4) & 060) | ((p[1] >> 4) & 017);
    127 			ch = ENC(ch);
    128 			if (putchar(ch) == EOF)
    129 				break;
    130 			ch = ((p[1] << 2) & 074) | ((p[2] >> 6) & 03);
    131 			ch = ENC(ch);
    132 			if (putchar(ch) == EOF)
    133 				break;
    134 			ch = p[2] & 077;
    135 			ch = ENC(ch);
    136 			if (putchar(ch) == EOF)
    137 				break;
    138 		}
    139 		if (putchar('\n') == EOF)
    140 			break;
    141 	}
    142 	if (ferror(stdin))
    143 		err(1, "read error.");
    144 	ch = ENC('\0');
    145 	(void)putchar(ch);
    146 	(void)putchar('\n');
    147 }
    148 
    149 static void
    150 usage(void)
    151 {
    152 	(void)fprintf(stderr, "usage: %s [infile] remotefile\n",
    153 		      getprogname());
    154 	exit(1);
    155 }
    156