1 .\" Copyright (c) 1980, 1990, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. Neither the name of the University nor the names of its contributors
13 .\" may be used to endorse or promote products derived from this software
14 .\" without specific prior written permission.
16 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 .\" @(#)colrm.1 8.1 (Berkeley) 6/6/93
36 .Nd remove columns from a file
39 .Op Ar start Op Ar stop
43 utility removes selected columns from the lines of a file.
44 A column is defined as a single character in a line.
45 Input is read from the standard input.
46 Output is written to the standard output.
50 column is specified, columns numbered less than the
52 column will be written.
57 columns are specified, columns numbered less than the
62 column will be written.
63 Column numbering starts with one, not zero.
65 Tab characters increment the column count to the next multiple of eight.
66 Backspace characters decrement the column count by one.
72 environment variables affect the execution of
79 Show columns below 3 (c) and above 5 (e):
80 .Bd -literal -offset indent
81 $ echo -e "abcdefgh\en12345678" | colrm 3 5
86 Specifying a start column bigger than the number of columns in the file is
87 allowed and shows all the columns:
88 .Bd -literal -offset indent
89 $ echo "abcdefgh" | colrm 100
93 Using 1 as start column will show nothing:
94 .Bd -literal -offset indent
95 $ echo "abcdefgh" | colrm 1
106 utility first appeared in
110 wrote the original version of