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uuencode.c revision 1.6 
      1 /*	$NetBSD: uuencode.c,v 1.6 1994/11/17 07:39:43 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 #endif /* not lint */
     40 
     41 #ifndef lint
     42 #if 0
     43 static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
     44 #endif
     45 static char rcsid[] = "$NetBSD: uuencode.c,v 1.6 1994/11/17 07:39:43 jtc Exp $";
     46 #endif /* not lint */
     47 
     48 /*
     49  * uuencode [input] output
     50  *
     51  * Encode a file so it can be mailed to a remote system.
     52  */
     53 #include <stdio.h>
     54 #include <stdlib.h>
     55 #include <string.h>
     56 #include <locale.h>
     57 #include <errno.h>
     58 #include <sys/types.h>
     59 #include <sys/stat.h>
     60 #include <unistd.h>
     61 
     62 static void encode();
     63 static __dead void usage();
     64 
     65 int
     66 main(argc, argv)
     67 	int argc;
     68 	char *argv[];
     69 {
     70 	struct stat sb;
     71 	int mode;
     72 
     73 	setlocale(LC_ALL, "");
     74 
     75 	while (getopt(argc, argv, "") != -1)
     76 		usage();
     77 	argv += optind;
     78 	argc -= optind;
     79 
     80 	switch(argc) {
     81 	case 2:			/* optional first argument is input file */
     82 		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
     83 			(void)fprintf(stderr, "uuencode: %s: %s.\n",
     84 			    *argv, strerror(errno));
     85 			exit(1);
     86 		}
     87 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     88 		mode = sb.st_mode & RWX;
     89 		++argv;
     90 		break;
     91 	case 1:
     92 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     93 		mode = RW & ~umask(RW);
     94 		break;
     95 	case 0:
     96 	default:
     97 		usage();
     98 	}
     99 
    100 	(void)printf("begin %o %s\n", mode, *argv);
    101 	encode();
    102 	(void)printf("end\n");
    103 	if (ferror(stdout)) {
    104 		(void)fprintf(stderr, "uuencode: write error.\n");
    105 		exit(1);
    106 	}
    107 	exit(0);
    108 }
    109 
    110 /* ENC is the basic 1 character encoding function to make a char printing */
    111 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
    112 
    113 /*
    114  * copy from in to out, encoding as you go along.
    115  */
    116 static void
    117 encode()
    118 {
    119 	register int ch, n;
    120 	register char *p;
    121 	char buf[80];
    122 
    123 	while (n = fread(buf, 1, 45, stdin)) {
    124 		ch = ENC(n);
    125 		if (putchar(ch) == EOF)
    126 			break;
    127 		for (p = buf; n > 0; n -= 3, p += 3) {
    128 			ch = *p >> 2;
    129 			ch = ENC(ch);
    130 			if (putchar(ch) == EOF)
    131 				break;
    132 			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
    133 			ch = ENC(ch);
    134 			if (putchar(ch) == EOF)
    135 				break;
    136 			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
    137 			ch = ENC(ch);
    138 			if (putchar(ch) == EOF)
    139 				break;
    140 			ch = p[2] & 077;
    141 			ch = ENC(ch);
    142 			if (putchar(ch) == EOF)
    143 				break;
    144 		}
    145 		if (putchar('\n') == EOF)
    146 			break;
    147 	}
    148 	if (ferror(stdin)) {
    149 		(void)fprintf(stderr, "uuencode: read error.\n");
    150 		exit(1);
    151 	}
    152 	ch = ENC('\0');
    153 	(void)putchar(ch);
    154 	(void)putchar('\n');
    155 }
    156 
    157 static void
    158 usage()
    159 {
    160 	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
    161 	exit(1);
    162 }
    163