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Annotation of src/usr.bin/expand/expand.1, Revision 1.6

1.6     ! aaron       1: .\"    $OpenBSD: expand.1,v 1.5 1999/06/05 01:21:24 aaron Exp $
1.1       deraadt     2: .\"    $NetBSD: expand.1,v 1.3 1995/09/02 06:19:45 jtc Exp $
                      3: .\"
                      4: .\" Copyright (c) 1980, 1990, 1993
                      5: .\"    The Regents of the University of California.  All rights reserved.
                      6: .\"
                      7: .\" Redistribution and use in source and binary forms, with or without
                      8: .\" modification, are permitted provided that the following conditions
                      9: .\" are met:
                     10: .\" 1. Redistributions of source code must retain the above copyright
                     11: .\"    notice, this list of conditions and the following disclaimer.
                     12: .\" 2. Redistributions in binary form must reproduce the above copyright
                     13: .\"    notice, this list of conditions and the following disclaimer in the
                     14: .\"    documentation and/or other materials provided with the distribution.
                     15: .\" 3. All advertising materials mentioning features or use of this software
                     16: .\"    must display the following acknowledgement:
                     17: .\"    This product includes software developed by the University of
                     18: .\"    California, Berkeley and its contributors.
                     19: .\" 4. Neither the name of the University nor the names of its contributors
                     20: .\"    may be used to endorse or promote products derived from this software
                     21: .\"    without specific prior written permission.
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                     23: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24: .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26: .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27: .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29: .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30: .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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                     32: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33: .\" SUCH DAMAGE.
                     34: .\"
                     35: .\"    @(#)expand.1    8.1 (Berkeley) 6/9/93
                     36: .\"
                     37: .Dd June 9, 1993
                     38: .Dt EXPAND 1
1.5       aaron      39: .Os
1.1       deraadt    40: .Sh NAME
                     41: .Nm expand ,
                     42: .Nm unexpand
                     43: .Nd expand tabs to spaces, and vice versa
                     44: .Sh SYNOPSIS
                     45: .Nm expand
                     46: .Op Fl Ns Ar tabstop
1.3       aaron      47: .Op Fl Ns Ar tab1 , tab2 , ... , tabn
1.4       deraadt    48: .Op Ar file Ar ...
1.1       deraadt    49: .Nm unexpand
                     50: .Op Fl a
1.4       deraadt    51: .Op Ar file Ar ...
1.1       deraadt    52: .Sh DESCRIPTION
1.6     ! aaron      53: .Nm
1.1       deraadt    54: processes the named files or the standard input writing
                     55: the standard output with tabs changed into blanks.
                     56: Backspace characters are preserved into the output and decrement
                     57: the column count for tab calculations.
1.6     ! aaron      58: .Nm
1.1       deraadt    59: is useful for pre-processing character files
                     60: (before sorting, looking at specific columns, etc.) that
                     61: contain tabs.
                     62: .Pp
                     63: If a single
                     64: .Ar tabstop
1.3       aaron      65: argument is given, tabs are set
1.1       deraadt    66: .Ar tabstop
                     67: spaces apart instead of the default 8.
                     68: If multiple tabstops are given then the tabs are set at those
                     69: specific columns.
                     70: .Pp
1.3       aaron      71: .Nm unexpand
1.1       deraadt    72: puts tabs back into the data from the standard input or the named
                     73: files and writes the result on the standard output.
                     74: .Pp
                     75: Option (with
                     76: .Nm unexpand
                     77: only):
                     78: .Bl -tag -width flag
                     79: .It Fl a
                     80: By default, only leading blanks and tabs
                     81: are reconverted to maximal strings of tabs.  If the
                     82: .Fl a
1.3       aaron      83: option is given, tabs are inserted whenever they would compress the
1.1       deraadt    84: resultant file by replacing two or more characters.
                     85: .El
                     86: .Sh HISTORY
                     87: The
1.6     ! aaron      88: .Nm
1.1       deraadt    89: command appeared in
                     90: .Bx 3.0 .