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colrm.c
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Editing: colrm.1
.\" Copyright (c) 1980, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)colrm.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD$ .\" .Dd June 23, 2020 .Dt COLRM 1 .Os .Sh NAME .Nm colrm .Nd remove columns from a file .Sh SYNOPSIS .Nm .Op Ar start Op Ar stop .Sh DESCRIPTION The .Nm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. .Pp If only the .Ar start column is specified, columns numbered less than the .Ar start column will be written. If both .Ar start and .Ar stop columns are specified, columns numbered less than the .Ar start column or greater than the .Ar stop column will be written. Column numbering starts with one, not zero. .Pp Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. .Sh ENVIRONMENT The .Ev LANG , LC_ALL and .Ev LC_CTYPE environment variables affect the execution of .Nm as described in .Xr environ 7 . .Sh EXIT STATUS .Ex -std .Sh EXAMPLES Show columns below 3 (c) and above 5 (e): .Bd -literal -offset indent $ echo -e "abcdefgh\en12345678" | colrm 3 5 abfgh 12678 .Ed .Pp Specifying a start column bigger than the number of columns in the file is allowed and shows all the columns: .Bd -literal -offset indent $ echo "abcdefgh" | colrm 100 abcdefgh .Ed .Pp Using 1 as start column will show nothing: .Bd -literal -offset indent $ echo "abcdefgh" | colrm 1 .Ed .Sh SEE ALSO .Xr awk 1 , .Xr column 1 , .Xr cut 1 , .Xr paste 1 .Sh HISTORY The .Nm utility first appeared in .Bx 1 . .Sh AUTHORS .An Jeff Schriebman wrote the original version of .Nm in November 1974.
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