Copyright (c) 2002 Tim J. Robbins.
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.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
$FreeBSD: src/usr.bin/csplit/csplit.1,v 1.11 2005/01/25 22:29:51 tjr Exp $
.Dd February 4, 2014 .Dt CSPLIT 1 .Os .Sh NAME .Nm csplit .Nd split files based on context .Sh SYNOPSIS .Nm .Op Fl ks .Op Fl f Ar prefix .Op Fl n Ar number .Ar file args ... .Sh DESCRIPTION The .Nm utility splits .Ar file into pieces using the patterns .Ar args . If .Ar file is a dash
q Sq - , .Nm reads from standard input.
p Files are created with a prefix of .Dq xx and two decimal digits. The size of each file is written to standard output as it is created. If an error occurs whilst files are being created, or a .Dv HUP , .Dv INT , or .Dv TERM signal is received, all files previously written are removed.
p The options are as follows: l -tag -offset indent -width 10n t Fl f Ar prefix Create file names beginning with .Ar prefix , instead of .Dq xx . t Fl k Do not remove previously created files if an error occurs or a .Dv HUP , .Dv INT , or .Dv TERM signal is received. t Fl n Ar number Create file names beginning with .Ar number of decimal digits after the prefix, instead of 2. t Fl s Do not write the size of each output file to standard output as it is created. .El
p The .Ar args operands may be a combination of the following patterns: l -tag -offset indent -width 10n t / Ns Ar regexp Ns / Ns Oo Oo Cm + Ns | Ns Cm - Oc Ns Ar offset Oc Create a file containing the input from the current line to (but not including) the next line matching the given basic regular expression. An optional .Ar offset from the line that matched may be specified. t % Ns Ar regexp Ns % Ns Oo Oo Cm + Ns | Ns Cm - Oc Ns Ar offset Oc Same as above but a file is not created for the output. t Ar line_no Create containing the input from the current line to (but not including) the specified line number. t Brq Ar num Repeat the previous pattern the specified number of times. If it follows a line number pattern, a new file will be created for each .Ar line_no lines, .Ar num times. The first line of the file is line number 1 for historic reasons. .El
p After all the patterns have been processed, the remaining input data (if there is any) will be written to a new file.
p Requesting to split at a line before the current line number or past the end of the file will result in an error. .Sh ENVIRONMENT The .Ev LANG , LC_ALL , LC_COLLATE , and .Ev LC_CTYPE environment variables affect the execution of .Nm as described in .Xr environ 7 . .Sh EXIT STATUS .Ex -std .Sh EXAMPLES Split the .Xr mdoc 7 file
a foo.1 into one file for each section (up to 21 plus one for the rest, if any):
p .Dl "$ csplit -k foo.1 '%^\e.Sh%' '/^\e.Sh/' '{20}'"
p Split standard input after the first 99 lines and every 100 lines thereafter:
p .Dl "$ csplit -k - 100 '{19}'" .Sh SEE ALSO .Xr sed 1 , .Xr split 1 , .Xr re_format 7 .Sh STANDARDS The .Nm utility conforms to .St -p1003.1-2004 . .Sh HISTORY A .Nm command appeared in PWB UNIX. .Sh BUGS Input lines are limited to .Dv LINE_MAX (2048) bytes in length.