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uuencode.c revision 1.5 
      1 /*
      2  * Copyright (c) 1983 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 /*static char sccsid[] = "from: @(#)uuencode.c	5.9 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: uuencode.c,v 1.5 1993/11/09 01:47:00 jtc Exp $";
     37 #endif /* not lint */
     38 
     39 /*
     40  * uuencode [input] output
     41  *
     42  * Encode a file so it can be mailed to a remote system.
     43  */
     44 #include <stdio.h>
     45 #include <stdlib.h>
     46 #include <string.h>
     47 #include <locale.h>
     48 #include <errno.h>
     49 #include <sys/types.h>
     50 #include <sys/stat.h>
     51 #include <unistd.h>
     52 
     53 static void encode();
     54 static __dead void usage();
     55 
     56 int
     57 main(argc, argv)
     58 	int argc;
     59 	char **argv;
     60 {
     61 	struct stat sb;
     62 	int mode;
     63 
     64 	setlocale(LC_ALL, "");
     65 
     66 	while (getopt(argc, argv, "") != -1)
     67 		usage();
     68 	argv += optind;
     69 	argc -= optind;
     70 
     71 	switch(argc) {
     72 	case 2:			/* optional first argument is input file */
     73 		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
     74 			(void)fprintf(stderr, "uuencode: %s: %s.\n",
     75 			    *argv, strerror(errno));
     76 			exit(1);
     77 		}
     78 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     79 		mode = sb.st_mode & RWX;
     80 		++argv;
     81 		break;
     82 	case 1:
     83 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     84 		mode = RW & ~umask(RW);
     85 		break;
     86 	case 0:
     87 	default:
     88 		usage();
     89 	}
     90 
     91 	(void)printf("begin %o %s\n", mode, *argv);
     92 	encode();
     93 	(void)printf("end\n");
     94 	if (ferror(stdout)) {
     95 		(void)fprintf(stderr, "uuencode: write error.\n");
     96 		exit(1);
     97 	}
     98 	exit(0);
     99 }
    100 
    101 /* ENC is the basic 1 character encoding function to make a char printing */
    102 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
    103 
    104 /*
    105  * copy from in to out, encoding as you go along.
    106  */
    107 static void
    108 encode()
    109 {
    110 	register int ch, n;
    111 	register char *p;
    112 	char buf[80];
    113 
    114 	while (n = fread(buf, 1, 45, stdin)) {
    115 		ch = ENC(n);
    116 		if (putchar(ch) == EOF)
    117 			break;
    118 		for (p = buf; n > 0; n -= 3, p += 3) {
    119 			ch = *p >> 2;
    120 			ch = ENC(ch);
    121 			if (putchar(ch) == EOF)
    122 				break;
    123 			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
    124 			ch = ENC(ch);
    125 			if (putchar(ch) == EOF)
    126 				break;
    127 			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
    128 			ch = ENC(ch);
    129 			if (putchar(ch) == EOF)
    130 				break;
    131 			ch = p[2] & 077;
    132 			ch = ENC(ch);
    133 			if (putchar(ch) == EOF)
    134 				break;
    135 		}
    136 		if (putchar('\n') == EOF)
    137 			break;
    138 	}
    139 	if (ferror(stdin)) {
    140 		(void)fprintf(stderr, "uuencode: read error.\n");
    141 		exit(1);
    142 	}
    143 	ch = ENC('\0');
    144 	(void)putchar(ch);
    145 	(void)putchar('\n');
    146 }
    147 
    148 static void
    149 usage()
    150 {
    151 	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
    152 	exit(1);
    153 }
    154