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uuencode.c revision 1.7 
      1 /*	$NetBSD: uuencode.c,v 1.7 1994/11/17 07:41:15 jtc 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 char copyright[] =
     37 "@(#) Copyright (c) 1983, 1993\n\
     38 	The Regents of the University of California.  All rights reserved.\n";
     39 
     40 #ifndef lint
     41 #if 0
     42 static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
     43 #endif
     44 static char rcsid[] = "$NetBSD: uuencode.c,v 1.7 1994/11/17 07:41:15 jtc Exp $";
     45 #endif /* not lint */
     46 
     47 /*
     48  * uuencode [input] output
     49  *
     50  * Encode a file so it can be mailed to a remote system.
     51  */
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <locale.h>
     56 #include <errno.h>
     57 #include <sys/types.h>
     58 #include <sys/stat.h>
     59 #include <unistd.h>
     60 
     61 static void encode();
     62 static __dead void usage();
     63 
     64 int
     65 main(argc, argv)
     66 	int argc;
     67 	char *argv[];
     68 {
     69 	struct stat sb;
     70 	int mode;
     71 
     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 			(void)fprintf(stderr, "uuencode: %s: %s.\n",
     83 			    *argv, strerror(errno));
     84 			exit(1);
     85 		}
     86 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     87 		mode = sb.st_mode & RWX;
     88 		++argv;
     89 		break;
     90 	case 1:
     91 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     92 		mode = RW & ~umask(RW);
     93 		break;
     94 	case 0:
     95 	default:
     96 		usage();
     97 	}
     98 
     99 	(void)printf("begin %o %s\n", mode, *argv);
    100 	encode();
    101 	(void)printf("end\n");
    102 	if (ferror(stdout)) {
    103 		(void)fprintf(stderr, "uuencode: write error.\n");
    104 		exit(1);
    105 	}
    106 	exit(0);
    107 }
    108 
    109 /* ENC is the basic 1 character encoding function to make a char printing */
    110 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
    111 
    112 /*
    113  * copy from in to out, encoding as you go along.
    114  */
    115 static void
    116 encode()
    117 {
    118 	register int ch, n;
    119 	register char *p;
    120 	char buf[80];
    121 
    122 	while (n = fread(buf, 1, 45, stdin)) {
    123 		ch = ENC(n);
    124 		if (putchar(ch) == EOF)
    125 			break;
    126 		for (p = buf; n > 0; n -= 3, p += 3) {
    127 			ch = *p >> 2;
    128 			ch = ENC(ch);
    129 			if (putchar(ch) == EOF)
    130 				break;
    131 			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
    132 			ch = ENC(ch);
    133 			if (putchar(ch) == EOF)
    134 				break;
    135 			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
    136 			ch = ENC(ch);
    137 			if (putchar(ch) == EOF)
    138 				break;
    139 			ch = p[2] & 077;
    140 			ch = ENC(ch);
    141 			if (putchar(ch) == EOF)
    142 				break;
    143 		}
    144 		if (putchar('\n') == EOF)
    145 			break;
    146 	}
    147 	if (ferror(stdin)) {
    148 		(void)fprintf(stderr, "uuencode: read error.\n");
    149 		exit(1);
    150 	}
    151 	ch = ENC('\0');
    152 	(void)putchar(ch);
    153 	(void)putchar('\n');
    154 }
    155 
    156 static void
    157 usage()
    158 {
    159 	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
    160 	exit(1);
    161 }
    162