.\" Copyright (c) 1993-1997 Soenke Behrens, Devin Reade
.\"
.\" $Id: udl.1,v 1.14 1999/07/03 14:45:43 gdr-ftp Exp $
.\"
.TH UDL 1 "11 December 1997" GNO "Commands and Applications"
.SH NAME
udl - convert text files between different architectures
.SH SYNOPSIS
.BR udl
.BR -u | m | g
[
.B -RvpVh
]
.I file1 
[
.IR file2 " ..."
]
.SH DESCRIPTION
.B udl
converts files between different computer systems by changing the EOL
(End-Of-Line) character.
.PP
On the Apple IIgs,
.B udl
will skip any file that is not of type TXT or SRC.
No notice is given of this unless the
.B -v
flag is used.
Since UNIX file systems do not have file types
.BR udl
is limited in the types of checks which it can carry out,
so the user must take care that
it is not invoked on object files or the like.  On both platforms, if
.I file
appears to be a binary file (that is, no EOL is
found in the first part of the file) then
.I file
will be skipped.
Again, no notice is given of this unless the
.B -v
flag is used.
.PP
During file conversion
.B udl
creates a temporary file in the same directory as the original file.
The temporary file is close to or exactly the same size as the original
file.
.PP
When running under Byteworks' ORCA shell, the ORCA shell wildcards
.BR =
and
.BR ?
are properly expanded in file names.
.SH OPTIONS
.IP \fB\-u\fP
Convert to use LF as EOL (UNIX/Amiga).
.IP \fB\-m\fP
Convert to use CR/LF as EOL (MS-DOS).
.IP \fB\-g\fP
Convert to use CR as EOL (Apple).
.IP \fB\-p\fP
Be pedantic, only affects UNIX<->Apple conversions, see below.
.IP \fB\-R\fP
Recurse through subdirectories.
.IP \fB\-v\fP
Be verbose, show the file udl is currently working on.
.IP \fB\-V\fP
Print out udl's version number and abort.
.IP \fB\-h\fP
Print out usage information for udl.
.PP
If you specify the
.B -p
switch,
.B udl
is pedantic while doing the conversion. This means: The input file may
contain bytes with a value of zero (0), and the input file may contain
different EOL characters (ie: MS-DOS and UNIX style might be mixed in
one file). For conversions to or from MS-DOS
.B udl
is always pedantic, so this only affects conversions from UNIX to Apple
or vice versa. Being pedantic slows udl down by a factor of 1.5.
.SH LIMITATIONS
When running under GNO on the Apple IIgs, there is a limit to the nesting
depth when recusing on subdirectories.  This is because the routine that
is responsible for this behavior is itself recursive.  The default 2k
stack size will allow about 33 levels of nested directories, so this limit
should not normally be a problem.  If the limit is exceeded,
.BR udl
will exit with an error message before any files are changed, and before
the stack actually overflows.
.SH BUGS
Bug reports should be directed to one of the two addresses below.
.SH AUTHOR
Soenke Behrens <sbehrens@bigfoot.com> with contributions by
Devin Reade <gdr@gno.org>.
.SH VERSION
This manual page documents
.B udl
version 1.1.6.