madler@piglet.caltech.edu (Mark Adler) (04/13/90)
I recently posted the C source for a uudecoder. I am now posting a
newer version of the uudecoder and a uuencoder as well, to complete
the set. These versions work with Turbo C and Microsoft C, as well
as on Unix systems (which should have them already anyway). UU-ing
is a fairly standard way of getting binary files through mail.
uuencode is normally used like:
uuencode FILEIN FILENAME > FILEOUT
where FILEIN is the name of the file to uuencode, FILENAME is the name
that will be given to the file when it is uudecoded (usually the same
name, but it must be specified), and FILEOUT is where the uuencoded
files goes.
uudecode is used simply:
uudecode FILEIN
where FILEIN is the name of the uuencoded file. It writes the file
with the name specified when it was uuencoded.
Mark Adler
madler@tybalt.caltech.edu
--- CUT HERE ---
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* Modified 12 April 1990 by Mark Adler for use on MSDOS systems with
* Microsoft C and Turbo C.
*/
#ifndef lint
static char sccsid[] = "@(#)uudecode.c 5.5 (Berkeley) 7/6/88";
#endif /* not lint */
#ifdef __MSDOS__ /* For Turbo C */
#define MSDOS 1
#endif
/*
* uudecode [input]
*
* create the specified file, decoding as you go.
* used with uuencode.
*/
#include <stdio.h>
#ifndef MSDOS
#include <pwd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
/* single character decode */
#define DEC(c) (((c) - ' ') & 077)
main(argc, argv)
char **argv;
{
FILE *in, *out;
int mode;
char dest[128];
char buf[80];
/* optional input arg */
if (argc > 1) {
if ((in = fopen(argv[1], "r")) == NULL) {
perror(argv[1]);
exit(1);
}
argv++; argc--;
} else
in = stdin;
if (argc != 1) {
printf("Usage: uudecode [infile]\n");
exit(2);
}
/* search for header line */
for (;;) {
if (fgets(buf, sizeof buf, in) == NULL) {
fprintf(stderr, "No begin line\n");
exit(3);
}
if (strncmp(buf, "begin ", 6) == 0)
break;
}
(void)sscanf(buf, "begin %o %s", &mode, dest);
/* handle ~user/file format */
#ifndef MSDOS
if (dest[0] == '~') {
char *sl;
struct passwd *getpwnam();
struct passwd *user;
char dnbuf[100], *index(), *strcat(), *strcpy();
sl = index(dest, '/');
if (sl == NULL) {
fprintf(stderr, "Illegal ~user\n");
exit(3);
}
*sl++ = 0;
user = getpwnam(dest+1);
if (user == NULL) {
fprintf(stderr, "No such user as %s\n", dest);
exit(4);
}
strcpy(dnbuf, user->pw_dir);
strcat(dnbuf, "/");
strcat(dnbuf, sl);
strcpy(dest, dnbuf);
}
#endif
/* create output file */
#ifdef MSDOS
out = fopen(dest, "wb"); /* Binary file */
#else
out = fopen(dest, "w");
#endif
if (out == NULL) {
perror(dest);
exit(4);
}
#ifndef MSDOS
chmod(dest, mode);
#endif
decode(in, out);
if (fgets(buf, sizeof buf, in) == NULL || strcmp(buf, "end\n")) {
fprintf(stderr, "No end line\n");
exit(5);
}
exit(0);
}
/*
* copy from in to out, decoding as you go along.
*/
decode(in, out)
FILE *in;
FILE *out;
{
char buf[80];
char *bp;
int n;
for (;;) {
/* for each input line */
if (fgets(buf, sizeof buf, in) == NULL) {
printf("Short file\n");
exit(10);
}
n = DEC(buf[0]);
if (n <= 0)
break;
bp = &buf[1];
while (n > 0) {
outdec(bp, out, n);
bp += 4;
n -= 3;
}
}
}
/*
* output a group of 3 bytes (4 input characters).
* the input chars are pointed to by p, they are to
* be output to file f. n is used to tell us not to
* output all of them at the end of the file.
*/
outdec(p, f, n)
char *p;
FILE *f;
{
int c1, c2, c3;
c1 = DEC(*p) << 2 | DEC(p[1]) >> 4;
c2 = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
c3 = DEC(p[2]) << 6 | DEC(p[3]);
if (n >= 1)
putc(c1, f);
if (n >= 2)
putc(c2, f);
if (n >= 3)
putc(c3, f);
}
/*
* Return the ptr in sp at which the character c appears;
* NULL if not found
*/
#define NULL 0
char *
index(sp, c)
register char *sp, c;
{
do {
if (*sp == c)
return(sp);
} while (*sp++);
return(NULL);
}
--- CUT HERE ---
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
* Modified 12 April 1990 by Mark Adler for use on MSDOS systems with
* Microsoft C and Turbo C.
*/
#ifndef lint
static char sccsid[] = "@(#)uuencode.c 5.6 (Berkeley) 7/6/88";
#endif /* not lint */
#ifdef __MSDOS__ /* For Turbo C */
#define MSDOS 1
#endif
/*
* uuencode [input] output
*
* Encode a file so it can be mailed to a remote system.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
/* ENC is the basic 1 character encoding function to make a char printing */
#define ENC(c) ((c) ? ((c) & 077) + ' ': '`')
main(argc, argv)
char **argv;
{
FILE *in;
struct stat sbuf;
int mode;
/* optional 1st argument */
if (argc > 2) {
#ifdef MSDOS
if ((in = fopen(argv[1], "rb")) == NULL) { /* Binary file */
#else
if ((in = fopen(argv[1], "r")) == NULL) {
#endif
perror(argv[1]);
exit(1);
}
argv++; argc--;
} else
in = stdin;
if (argc != 2) {
fprintf(stderr,"Usage: uuencode [infile] remotefile\n");
exit(2);
}
/* figure out the input file mode */
if (fstat(fileno(in), &sbuf) < 0 || !isatty(fileno(in)))
mode = 0666 & ~umask(0666);
else
mode = sbuf.st_mode & 0777;
printf("begin %o %s\n", mode, argv[1]);
encode(in, stdout);
printf("end\n");
exit(0);
}
/*
* copy from in to out, encoding as you go along.
*/
encode(in, out)
register FILE *in;
register FILE *out;
{
char buf[80];
register int i, n;
for (;;) {
/* 1 (up to) 45 character line */
n = fread(buf, 1, 45, in);
putc(ENC(n), out);
for (i=0; i<n; i += 3)
outdec(&buf[i], out);
putc('\n', out);
if (n <= 0)
break;
}
}
/*
* output one group of 3 bytes, pointed at by p, on file f.
*/
outdec(p, f)
register char *p;
register FILE *f;
{
register int c1, c2, c3, c4;
c1 = *p >> 2;
c2 = (*p << 4) & 060 | (p[1] >> 4) & 017;
c3 = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
c4 = p[2] & 077;
putc(ENC(c1), f);
putc(ENC(c2), f);
putc(ENC(c3), f);
putc(ENC(c4), f);
}