fulton@comet.dec.com (05/23/86)
About 3 days ago I posted a request for code that implements uuencode and
uudecode under MS-DOS. I received two very good responses. One was source
code written in Turbo Pascal, the other in C. Since I don't have a C compiler,
I used the Turbo sources (I have Turbo V3.0). They work great. Today I saw
the following message, so I thought I would go ahead and post the sources I
received.
( Note: now if I could only get code that would perform Unix's /bin/sh
under MS-DOS.... )
- Cathy Fulton
P.S. - To the person (henry) who mailed me the Turbo source code, I regret that
I inadvertantly lost your full name, so I am unable to give you credit
for the code. However, I thank you for it very much, and I hope others
will find it as useful as I did.
************************************************************************
> This would be helpful to many other users. We too do not have uuencode
> or uudecode. Could someone post a version for MS-DOS to the net?
> John Kalbach
> Penn State University
> Microcomputer Information and Support Center
> 103 Computation Center
> University Park, PA 16802
> (814) 863-4356
> ...!psuvax1!psuvm.bitnet!u0n
> u0n%psuvm.bitnet@wscvm.arpa
*********************************************************************
First, the Turbo Pascal version :
*********************************************************************
Here are the sources. Using the programs is easy. To use uuencode type
>uuencode source target
where source is the source file name, and target is the target file name.
If target has no extension, then uuencode will add the extension .uue. If
you omit target, uuencode will use the source file name with the extension
.uue.
To use uudecode, type
>uudecode source
where source is the name of the uuencoded file. If you omit the extension on
source, uudecode will add .uue.
Let me know if you need more help.
regards,
henry
----- cut here ----------------------------------------------
Program uuencode;
CONST header = 'begin';
trailer = 'end';
defaultMode = '644';
defaultExtension = '.uue';
offset = 32;
charsPerLine = 60;
bytesPerHunk = 3;
sixBitMask = $3F;
TYPE string80 = string[80];
VAR infile: file of byte;
outfile: text;
infilename, outfilename, mode: string80;
lineLength, numbytes, bytesInLine: integer;
line: array [0..59] of char;
hunk: array [0..2] of byte;
chars: array [0..3] of byte;
{ procedure debug;
var i: integer;
procedure writebin(x: byte);
var i: integer;
begin
for i := 1 to 8 do
begin
write ((x and $80) shr 7);
x := x shl 1
end;
write (' ')
end;
begin
for i := 0 to 2 do writebin(hunk[i]);
writeln;
for i := 0 to 3 do writebin(chars[i]);
writeln;
for i := 0 to 3 do writebin(chars[i] and sixBitMask);
writeln
end; }
procedure Abort (message: string80);
begin {abort}
writeln(message);
close(infile);
close(outfile);
halt
end; {abort}
procedure Init;
procedure GetFiles;
VAR i: integer;
temp: string80;
ch: char;
begin {GetFiles}
if ParamCount < 1 then abort ('No input file specified.');
infilename := ParamStr(1);
{$I-}
assign (infile, infilename);
reset (infile);
{$i+}
if IOResult > 0 then abort (concat ('Can''t open file ', infilename));
write('Uuencoding file ', infilename);
i := pos('.', infilename);
if i = 0
then outfilename := infilename
else outfilename := copy (infilename, 1, pred(i));
mode := defaultMode;
if ParamCount > 1 then
for i := 2 to ParamCount do
begin
temp := Paramstr(i);
if temp[1] in ['0'..'9']
then mode := temp
else outfilename := temp
end;
if pos ('.', outfilename) = 0
then outfilename := concat(outfilename, defaultExtension);
assign (outfile, outfilename);
writeln (' to file ', outfilename, '.');
{$i-}
reset(outfile);
{$i+}
if IOresult = 0 then
begin
Write ('Overwrite current ', outfilename, '? [Y/N] ');
repeat
read (kbd, ch);
ch := Upcase(ch)
until ch in ['Y', 'N'];
writeln (ch);
if ch = 'N' then abort(concat (outfilename, ' not overwritten.'))
end;
close(outfile);
{$i-}
rewrite(outfile);
{$i+}
if ioresult > 0 then abort(concat('Can''t open ', outfilename));
end; {getfiles}
begin {Init}
GetFiles;
bytesInLine := 0;
lineLength := 0;
numbytes := 0;
writeln (outfile, header, ' ', mode, ' ', infilename);
end; {init}
procedure FlushLine;
VAR i: integer;
procedure writeout(ch: char);
begin {writeout}
if ch = ' ' then write(outfile, '`')
else write(outfile, ch)
end; {writeout}
begin {FlushLine}
write ('.');
writeout(chr(bytesInLine + offset));
for i := 0 to pred(lineLength) do
writeout(line[i]);
writeln (outfile);
lineLength := 0;
bytesInLine := 0
end; {FlushLine}
procedure FlushHunk;
VAR i: integer;
begin {FlushHunk}
if lineLength = charsPerLine then FlushLine;
chars[0] := hunk[0] shr 2;
chars[1] := (hunk[0] shl 4) + (hunk[1] shr 4);
chars[2] := (hunk[1] shl 2) + (hunk[2] shr 6);
chars[3] := hunk[2] and sixBitMask;
{debug;}
for i := 0 to 3 do
begin
line[lineLength] := chr((chars[i] and sixBitMask) + offset);
{write(line[linelength]:2);}
lineLength := succ(lineLength)
end;
{writeln;}
bytesInLine := bytesInLine + numbytes;
numbytes := 0
end; {FlushHunk}
procedure encode1;
begin {encode1};
if numbytes = bytesperhunk then flushhunk;
read (infile, hunk[numbytes]);
numbytes := succ(numbytes)
end; {encode1}
procedure terminate;
begin {terminate}
if numbytes > 0 then flushhunk;
if lineLength > 0
then
begin
flushLine;
flushLine;
end
else flushline;
writeln (outfile, trailer);
close (outfile);
close (infile);
end; {terminate}
begin {uuencode}
init;
while not eof (infile) do encode1;
terminate
end. {uuencode}
----- cut here ----------------------------------------------
program uudecode;
CONST defaultSuffix = '.uue';
offset = 32;
TYPE string80 = string[80];
VAR infile: text;
outfile: file of byte;
lineNum: integer;
line: string80;
procedure Abort(message: string80);
begin {abort}
writeln;
if lineNum > 0 then write('Line ', lineNum, ': ');
writeln(message);
halt
end; {Abort}
procedure NextLine(var s: string80);
begin {NextLine}
LineNum := succ(LineNum);
write('.');
readln(infile, s)
end; {NextLine}
procedure Init;
procedure GetInFile;
VAR infilename: string80;
begin {GetInFile}
if ParamCount = 0 then abort ('Usage: uudecode <filename>');
infilename := ParamStr(1);
if pos('.', infilename) = 0
then infilename := concat(infilename, defaultSuffix);
assign(infile, infilename);
{$i-}
reset(infile);
{$i+}
if IOresult > 0 then abort (concat('Can''t open ', infilename));
writeln ('Decoding ', infilename)
end; {GetInFile}
procedure GetOutFile;
var header, mode, outfilename: string80;
ch: char;
procedure ParseHeader;
VAR index: integer;
Procedure NextWord(var word:string80; var index: integer);
begin {nextword}
word := '';
while header[index] = ' ' do
begin
index := succ(index);
if index > length(header) then abort ('Incomplete header')
end;
while header[index] <> ' ' do
begin
word := concat(word, header[index]);
index := succ(index)
end
end; {NextWord}
begin {ParseHeader}
header := concat(header, ' ');
index := 7;
NextWord(mode, index);
NextWord(outfilename, index)
end; {ParseHeader}
begin {GetOutFile}
if eof(infile) then abort('Nothing to decode.');
NextLine (header);
while not ((copy(header, 1, 6) = 'begin ') or eof(infile)) do
NextLine(header);
writeln;
if eof(infile) then abort('Nothing to decode.');
ParseHeader;
assign(outfile, outfilename);
writeln ('Destination is ', outfilename);
{$i-}
reset(outfile);
{$i+}
if IOresult = 0 then
begin
write ('Overwrite current ', outfilename, '? [Y/N] ');
repeat
read (kbd, ch);
ch := UpCase(ch)
until ch in ['Y', 'N'];
writeln(ch);
if ch = 'N' then abort ('Overwrite cancelled.')
end;
rewrite (outfile);
end; {GetOutFile}
begin {init}
lineNum := 0;
GetInFile;
GetOutFile;
end; { init}
Function CheckLine: boolean;
begin {CheckLine}
if line = '' then abort ('Blank line in file');
CheckLine := not (line[1] in [' ', '`'])
end; {CheckLine}
procedure DecodeLine;
VAR lineIndex, byteNum, count, i: integer;
chars: array [0..3] of byte;
hunk: array [0..2] of byte;
{ procedure debug;
var i: integer;
procedure writebin(x: byte);
var i: integer;
begin
for i := 1 to 8 do
begin
write ((x and $80) shr 7);
x := x shl 1
end;
write (' ')
end;
begin
writeln;
for i := 0 to 3 do writebin(chars[i]);
writeln;
for i := 0 to 2 do writebin(hunk[i]);
writeln
end; }
function nextch: char;
begin {nextch}
lineIndex := succ(lineIndex);
if lineIndex > length(line) then abort('Line too short.');
if not (line[lineindex] in [' '..'`'])
then abort('Illegal character in line.');
{ write(line[lineindex]:2);}
if line[lineindex] = '`' then nextch := ' '
else nextch := line[lineIndex]
end; {nextch}
procedure DecodeByte;
procedure GetNextHunk;
VAR i: integer;
begin {GetNextHunk}
for i := 0 to 3 do chars[i] := ord(nextch) - offset;
hunk[0] := (chars[0] shl 2) + (chars[1] shr 4);
hunk[1] := (chars[1] shl 4) + (chars[2] shr 2);
hunk[2] := (chars[2] shl 6) + chars[3];
byteNum := 0 {;
debug }
end; {GetNextHunk}
begin {DecodeByte}
if byteNum = 3 then GetNextHunk;
write (outfile, hunk[byteNum]);
{writeln(bytenum, ' ', hunk[byteNum]);}
byteNum := succ(byteNum)
end; {DecodeByte}
begin {DecodeLine}
lineIndex := 0;
byteNum := 3;
count := (ord(nextch) - offset);
for i := 1 to count do DecodeByte
end; {DecodeLine}
procedure terminate;
var trailer: string80;
begin {terminate}
if eof(infile) then abort ('Abnormal end.');
NextLine (trailer);
if length (trailer) < 3 then abort ('Abnormal end.');
if copy (trailer, 1, 3) <> 'end' then abort ('Abnormal end.');
close (infile);
close (outfile)
end;
begin {uudecode}
init;
NextLine(line);
while CheckLine do
begin
DecodeLine;
NextLine(line)
end;
terminate
end.
**************************************************************************
...and now the C version:
*************************************************************************
uudecode and uuencode are easily implemented under MSDOS as well. Here
are the sources for Microsoft C v3.0, but if you have another kind of C
compiler, there should be perhaps only 1 change -- the output file of
uudecode and the input file of uuencode must be in binary format.
(ie. binary files, like .EXE files may have byte patterns that are the
same as ^Z, which signals end-of-file in non-binary (text) mode).
If you need more info, write back. Note that the included files are
*not* in "shar" format -- you will have to use an editor to cut the
files out.
Don Kneller
UUCP: ...ucbvax!ucsfcgl!kneller
ARPA: kneller@ucsf-cgl.ARPA
BITNET: kneller@ucsfcgl.BITNET
====================================================
#ifndef lint
static char sccsid[] = "@(#)uuencode.c 5.1 (Berkeley) 7/2/83";
#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) & 077) + ' ')
main(argc, argv)
char **argv;
{
FILE *in;
struct stat sbuf;
int mode;
/* optional 1st argument */
if (argc > 2) {
#ifdef MSDOS
/* Use binary mode */
if ((in = fopen(argv[1], "rb")) == NULL) {
#else
if ((in = fopen(argv[1], "r")) == NULL) {
#endif
perror(argv[1]);
exit(1);
}
argv++; argc--;
} else
in = stdin;
if (argc != 2) {
printf("Usage: uuencode [infile] remotefile\n");
exit(2);
}
/* figure out the input file mode */
fstat(fileno(in), &sbuf);
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)
FILE *in;
FILE *out;
{
char buf[80];
int i, n;
for (;;) {
/* 1 (up to) 45 character line */
n = fr(in, buf, 45);
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)
char *p;
FILE *f;
{
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);
}
/* fr: like read but stdio */
int
fr(fd, buf, cnt)
FILE *fd;
char *buf;
int cnt;
{
int c, i;
for (i=0; i<cnt; i++) {
c = getc(fd);
if (c == EOF)
return(i);
buf[i] = c;
}
return (cnt);
}
====================================================
#ifndef lint
static char sccsid[] = "@(#)uudecode.c 5.1 (Berkeley) 7/2/83";
#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;
struct stat sbuf;
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;
}
sscanf(buf, "begin %o %s", &mode, dest);
/* handle ~user/file format */
#ifndef MSDOS
if (dest[0] == '~') {
char *sl;
struct passwd *getpwnam();
char *index();
struct passwd *user;
char dnbuf[100];
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
/* binary output file */
out = fopen(dest, "wb");
#else
out = fopen(dest, "w");
#endif
if (out == NULL) {
perror(dest);
exit(4);
}
chmod(dest, mode);
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);
}
/* fr: like read but stdio */
int
fr(fd, buf, cnt)
FILE *fd;
char *buf;
int cnt;
{
int c, i;
for (i=0; i<cnt; i++) {
c = getc(fd);
if (c == EOF)
return(i);
buf[i] = c;
}
return (cnt);
}
/*
* 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);
}