1.\" $OpenBSD: csplit.1,v 1.11 2014/02/04 13:26:36 jmc Exp $ 2.\" 3.\" Copyright (c) 2002 Tim J. Robbins. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/usr.bin/csplit/csplit.1,v 1.11 2005/01/25 22:29:51 tjr Exp $ 28.\" 29.Dd $Mdocdate: February 4 2014 $ 30.Dt CSPLIT 1 31.Os 32.Sh NAME 33.Nm csplit 34.Nd split files based on context 35.Sh SYNOPSIS 36.Nm 37.Op Fl ks 38.Op Fl f Ar prefix 39.Op Fl n Ar number 40.Ar file args ... 41.Sh DESCRIPTION 42The 43.Nm 44utility splits 45.Ar file 46into pieces using the patterns 47.Ar args . 48If 49.Ar file 50is 51a dash 52.Pq Sq - , 53.Nm 54reads from standard input. 55.Pp 56Files are created with a prefix of 57.Dq xx 58and two decimal digits. 59The size of each file is written to standard output 60as it is created. 61If an error occurs whilst files are being created, 62or a 63.Dv HUP , 64.Dv INT , 65or 66.Dv TERM 67signal is received, 68all files previously written are removed. 69.Pp 70The options are as follows: 71.Bl -tag -width indent 72.It Fl f Ar prefix 73Create file names beginning with 74.Ar prefix , 75instead of 76.Dq xx . 77.It Fl k 78Do not remove previously created files if an error occurs or a 79.Dv HUP , 80.Dv INT , 81or 82.Dv TERM 83signal is received. 84.It Fl n Ar number 85Create file names beginning with 86.Ar number 87of decimal digits after the prefix, 88instead of 2. 89.It Fl s 90Do not write the size of each output file to standard output as it is 91created. 92.El 93.Pp 94The 95.Ar args 96operands may be a combination of the following patterns: 97.Bl -tag -width indent 98.It Xo 99.Sm off 100.No / Ar regexp No / 101.Op Oo Cm + | - Oc Ar offset 102.Sm on 103.Xc 104Create a file containing the input from the current line to (but not including) 105the next line matching the given basic regular expression. 106An optional 107.Ar offset 108from the line that matched may be specified. 109.It Xo 110.Sm off 111.No % Ar regexp No % 112.Op Oo Cm + | - Oc Ar offset 113.Sm on 114.Xc 115Same as above but a file is not created for the output. 116.It Ar line_no 117Create containing the input from the current line to (but not including) 118the specified line number. 119.It { Ns Ar num Ns } 120Repeat the previous pattern the specified number of times. 121If it follows a line number pattern, a new file will be created for each 122.Ar line_no 123lines, 124.Ar num 125times. 126The first line of the file is line number 1 for historic reasons. 127.El 128.Pp 129After all the patterns have been processed, the remaining input data 130(if there is any) will be written to a new file. 131.Pp 132Requesting to split at a line before the current line number or past the 133end of the file will result in an error. 134.Sh EXIT STATUS 135.Ex -std csplit 136.Sh EXAMPLES 137Split the 138.Xr mdoc 7 139file 140.Pa foo.1 141into one file for each section (up to 21): 142.Pp 143.Dl "$ csplit -k foo.1 '%^\e.Sh%' '/^\e.Sh/' '{20}'" 144.Pp 145Split standard input after the first 99 lines and every 100 lines thereafter: 146.Pp 147.Dl "$ csplit -k - 100 '{19}'" 148.Sh SEE ALSO 149.Xr sed 1 , 150.Xr split 1 , 151.Xr re_format 7 152.Sh STANDARDS 153The 154.Nm 155utility is compliant with the 156.St -p1003.1-2008 157specification. 158.Sh HISTORY 159A 160.Nm 161command appeared in PWB 162.Ux . 163.Sh BUGS 164Input lines are limited to 165.Dv LINE_MAX 166(2048) bytes in length. 167