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.\" ========================================================================
.\"
.IX Title "EXPAND 1"
.TH EXPAND 1 "2001-06-06" "perl v5.20.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
expand, unexpand \- expand tabs to spaces, and vice versa
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
expand [\fB\-h\fR] [\fB\-tabstop\fR] [\fB\-tab1, tab2, ...\fR] [\fBfile\fR ...]
.PP
unexpand [\fB\-h\fR] [\fB\-a\fR] [\fB\-tabstop\fR] [\fB\-tab1, tab2, ...\fR]
[\fBfile\fR ...]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIexpand\fR processes the named files or the standard input writing the
standard output with tabs changed into blanks.  Backspace characters
are preserved into the output and decrement the column count for tab
calculations.  \fIexpand\fR is useful for pre-processing character files
(before sorting, looking at specific columns, etc.) that contain tabs.
.PP
If a single \fBtabstop\fR argument is given, tabs are set \fBtabstop\fR spaces
apart instead of the default 8.  If multiple tabstops are given then
the tabs are set at those specific columns.
.PP
\&\fIunexpand\fR puts tabs back into the data from the standard input or the
named files and writes the result on the standard output.
.PP
Option (with \fIexpand\fR and \fIunexpand\fR):
.IP "\-h" 4
.IX Item "-h"
Print a usage message and exit with a status code indicating success.
.PP
Option (with \fIunexpand\fR only):
.IP "\-a" 4
.IX Item "-a"
By default, only leading blanks and tabs are reconverted to maximal
strings of tabs.  If the \fB\-a\fR option is given, tabs are inserted
whenever they would compress the resultant file by replacing two or
more characters.
.SH "AUTHOR"
.IX Header "AUTHOR"
The Perl implementation was written by Thierry Bezecourt,
\&\fIthbzcrt@worldnet.fr\fR.  Perl Power Tools project, March 1999.
.PP
This documentation comes from the \s-1BSD\s0 \fIexpand\fR\|(1) man page.
.SH "COPYRIGHT and LICENSE"
.IX Header "COPYRIGHT and LICENSE"
This program is free and open software. You may use, modify, distribute,
and sell this program (and any modified variants) in any way you wish,
provided you do not restrict others from doing the same.