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uuencode.c revision 1.1.1.2 
      1 /*-
      2  * Copyright (c) 1983, 1993
      3  *	The Regents of the University of California.  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 char copyright[] =
     36 "@(#) Copyright (c) 1983, 1993\n\
     37 	The Regents of the University of California.  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 static char sccsid[] = "@(#)uuencode.c	8.2 (Berkeley) 4/2/94";
     42 #endif /* not lint */
     43 
     44 /*
     45  * uuencode [input] output
     46  *
     47  * Encode a file so it can be mailed to a remote system.
     48  */
     49 #include <sys/types.h>
     50 #include <sys/stat.h>
     51 
     52 #include <stdio.h>
     53 
     54 int
     55 main(argc, argv)
     56 	int argc;
     57 	char *argv[];
     58 {
     59 	extern int optind;
     60 	extern int errno;
     61 	struct stat sb;
     62 	int mode;
     63 	char *strerror();
     64 
     65 	while (getopt(argc, argv, "") != EOF)
     66 		usage();
     67 	argv += optind;
     68 	argc -= optind;
     69 
     70 	switch(argc) {
     71 	case 2:			/* optional first argument is input file */
     72 		if (!freopen(*argv, "r", stdin) || fstat(fileno(stdin), &sb)) {
     73 			(void)fprintf(stderr, "uuencode: %s: %s.\n",
     74 			    *argv, strerror(errno));
     75 			exit(1);
     76 		}
     77 #define	RWX	(S_IRWXU|S_IRWXG|S_IRWXO)
     78 		mode = sb.st_mode & RWX;
     79 		++argv;
     80 		break;
     81 	case 1:
     82 #define	RW	(S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
     83 		mode = RW & ~umask(RW);
     84 		break;
     85 	case 0:
     86 	default:
     87 		usage();
     88 	}
     89 
     90 	(void)printf("begin %o %s\n", mode, *argv);
     91 	encode();
     92 	(void)printf("end\n");
     93 	if (ferror(stdout)) {
     94 		(void)fprintf(stderr, "uuencode: write error.\n");
     95 		exit(1);
     96 	}
     97 	exit(0);
     98 }
     99 
    100 /* ENC is the basic 1 character encoding function to make a char printing */
    101 #define	ENC(c) ((c) ? ((c) & 077) + ' ': '`')
    102 
    103 /*
    104  * copy from in to out, encoding as you go along.
    105  */
    106 encode()
    107 {
    108 	register int ch, n;
    109 	register char *p;
    110 	char buf[80];
    111 
    112 	while (n = fread(buf, 1, 45, stdin)) {
    113 		ch = ENC(n);
    114 		if (putchar(ch) == EOF)
    115 			break;
    116 		for (p = buf; n > 0; n -= 3, p += 3) {
    117 			ch = *p >> 2;
    118 			ch = ENC(ch);
    119 			if (putchar(ch) == EOF)
    120 				break;
    121 			ch = (*p << 4) & 060 | (p[1] >> 4) & 017;
    122 			ch = ENC(ch);
    123 			if (putchar(ch) == EOF)
    124 				break;
    125 			ch = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
    126 			ch = ENC(ch);
    127 			if (putchar(ch) == EOF)
    128 				break;
    129 			ch = p[2] & 077;
    130 			ch = ENC(ch);
    131 			if (putchar(ch) == EOF)
    132 				break;
    133 		}
    134 		if (putchar('\n') == EOF)
    135 			break;
    136 	}
    137 	if (ferror(stdin)) {
    138 		(void)fprintf(stderr, "uuencode: read error.\n");
    139 		exit(1);
    140 	}
    141 	ch = ENC('\0');
    142 	(void)putchar(ch);
    143 	(void)putchar('\n');
    144 }
    145 
    146 usage()
    147 {
    148 	(void)fprintf(stderr,"usage: uuencode [infile] remotefile\n");
    149 	exit(1);
    150 }
    151