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uuencode.c revision 1.3 
      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 1.3 1993/08/27 22:30:57 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 <sys/types.h>
     45 #include <sys/stat.h>
     46 #include <stdio.h>
     47 #include <stdlib.h>
     48 #include <string.h>
     49 #include <errno.h>
     50 
     51 static void encode();
     52 static void usage();
     53 
     54 int
     55 main(argc, argv)
     56 	int argc;
     57 	char **argv;
     58 {
     59 	struct stat sb;
     60 	int mode;
     61 
     62 	while (getopt(argc, argv, "") != EOF)
     63 		usage();
     64 	argv += optind;
     65 	argc -= optind;
     66 
     67 	switch(argc) {
     68 	case 2:			/* optional first argument is input file */
     69 		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
     70 			(void)fprintf(stderr, "uuencode: %s: %s.\n",
     71 			    *argv, strerror(errno));
     72 			exit(1);
     73 		}
     74 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     75 		mode = sb.st_mode & RWX;
     76 		++argv;
     77 		break;
     78 	case 1:
     79 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     80 		mode = RW & ~umask(RW);
     81 		break;
     82 	case 0:
     83 	default:
     84 		usage();
     85 	}
     86 
     87 	(void)printf("begin %o %s\n", mode, *argv);
     88 	encode();
     89 	(void)printf("end\n");
     90 	if (ferror(stdout)) {
     91 		(void)fprintf(stderr, "uuencode: write error.\n");
     92 		exit(1);
     93 	}
     94 	exit(0);
     95 }
     96 
     97 /* ENC is the basic 1 character encoding function to make a char printing */
     98 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
     99 
    100 /*
    101  * copy from in to out, encoding as you go along.
    102  */
    103 static void
    104 encode()
    105 {
    106 	register int ch, n;
    107 	register char *p;
    108 	char buf[80];
    109 
    110 	while (n = fread(buf, 1, 45, stdin)) {
    111 		ch = ENC(n);
    112 		if (putchar(ch) == EOF)
    113 			break;
    114 		for (p = buf; n > 0; n -= 3, p += 3) {
    115 			ch = *p >> 2;
    116 			ch = ENC(ch);
    117 			if (putchar(ch) == EOF)
    118 				break;
    119 			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
    120 			ch = ENC(ch);
    121 			if (putchar(ch) == EOF)
    122 				break;
    123 			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
    124 			ch = ENC(ch);
    125 			if (putchar(ch) == EOF)
    126 				break;
    127 			ch = p[2] & 077;
    128 			ch = ENC(ch);
    129 			if (putchar(ch) == EOF)
    130 				break;
    131 		}
    132 		if (putchar('\n') == EOF)
    133 			break;
    134 	}
    135 	if (ferror(stdin)) {
    136 		(void)fprintf(stderr, "uuencode: read error.\n");
    137 		exit(1);
    138 	}
    139 	ch = ENC('\0');
    140 	(void)putchar(ch);
    141 	(void)putchar('\n');
    142 }
    143 
    144 static void
    145 usage()
    146 {
    147 	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
    148 	exit(1);
    149 }
    150