1.\" Copyright (c) 2002 Tim J. Robbins. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 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.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD: src/usr.bin/csplit/csplit.1,v 1.6 2002/08/14 11:38:30 ru Exp $ 26.\" $DragonFly: src/usr.bin/csplit/csplit.1,v 1.2 2006/02/17 19:39:01 swildner Exp $ 27.\" 28.Dd June 19, 2004 29.Dt CSPLIT 1 30.Os 31.Sh NAME 32.Nm csplit 33.Nd split files based on context 34.Sh SYNOPSIS 35.Nm 36.Op Fl ks 37.Op Fl f Ar prefix 38.Op Fl n Ar number 39.Ar file args ... 40.Sh DESCRIPTION 41The 42.Nm 43utility splits 44.Ar file 45into pieces using the patterns 46.Ar args . 47If 48.Ar file 49is 50a dash 51.Pq Sq Fl , 52.Nm 53reads from standard input. 54.Pp 55The options are as follows: 56.Bl -tag -width indent 57.It Fl f Ar prefix 58Give created files names beginning with 59.Ar prefix . 60The default is 61.Dq Pa xx . 62.It Fl k 63Do not remove output files if an error occurs or a 64.Dv HUP , 65.Dv INT 66or 67.Dv TERM 68signal is received. 69.It Fl n Ar number 70Use 71.Ar number 72of decimal digits after the 73.Ar prefix 74to form the file name. 75The default is 2. 76.It Fl s 77Do not write the size of each output file to standard output as it is 78created. 79.El 80.Pp 81The 82.Ar args 83operands may be a combination of the following patterns: 84.Bl -tag -width indent 85.It Xo 86.Sm off 87.Cm / Ar regexp Cm / Op Oo Cm + | - Oc Ar offset 88.Sm on 89.Xc 90Create a file containing the input from the current line to (but not including) 91the next line matching the given basic regular expression. 92An optional 93.Ar offset 94from the line that matched may be specified. 95.It Xo 96.Sm off 97.Cm % Ar regexp Cm % Op Oo Cm + | - Oc Ar offset 98.Sm on 99.Xc 100Same as above but a file is not created for the output. 101.It Ar line_no 102Create containing the input from the current line to (but not including) 103the specified line number. 104.It Cm { Ns Ar num Ns Cm } 105Repeat the previous pattern the specified number of times. 106If it follows a line number pattern, a new file will be created for each 107.Ar line_no 108lines, 109.Ar num 110times. 111The first line of the file is line number 1 for historic reasons. 112.El 113.Pp 114After all the patterns have been processed, the remaining input data 115(if there is any) will be written to a new file. 116.Pp 117Requesting to split at a line before the current line number or past the 118end of the file will result in an error. 119.Sh ENVIRONMENT 120The 121.Ev LANG , LC_ALL , LC_COLLATE 122and 123.Ev LC_CTYPE 124environment variables affect the execution of 125.Nm 126as described in 127.Xr environ 7 . 128.Sh EXAMPLES 129Split the 130.Xr mdoc 7 131file 132.Pa foo.1 133into one file for each section (up to 20): 134.Pp 135.Dl "csplit -k foo.1 '%^\e.Sh%' '/^\e.Sh/' '{20}'" 136.Pp 137Split standard input after the first 99 lines and every 100 lines thereafter: 138.Pp 139.Dl "csplit -k - 100 '{19}'" 140.Sh DIAGNOSTICS 141.Ex -std 142.Sh SEE ALSO 143.Xr sed 1 , 144.Xr split 1 , 145.Xr re_format 7 146.Sh STANDARDS 147The 148.Nm 149utility conforms to 150.St -p1003.1-2001 . 151.Sh HISTORY 152A 153.Nm 154command appeared in PWB UNIX. 155.Sh AUTHORS 156The 157.Nm 158utility was written by 159.An Tim J\. Robbins Aq tjr@FreeBSD.org . 160