The csplit utility shall read the file named by the file
operand, write all or part of that file into other files
as directed by the arg operands, and write the sizes of the
files.
The csplit utility shall conform to the Base Definitions volume
of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following options shall be supported:
-f prefix
Name the created files prefix00, prefix01,
..., prefixn. The default is xx00 ...
xxn. If the prefix argument would create a filename
exceeding {NAME_MAX} bytes, an error shall result,
csplit shall exit with a diagnostic message, and no files shall
be created.
-k
Leave previously created files intact. By default, csplit shall
remove created files if an error occurs.
-n number
Use number decimal digits to form filenames for the file pieces.
The default shall be 2.
The pathname of a text file to be split. If file is ’-’
, the standard input shall be used.
The operands arg1 ... argn can be a combination of the
following:
/rexp/[offset]
A file shall be created using the content of the lines from the current
line up to, but not including, the line that results from
the evaluation of the regular expression with offset, if any,
applied. The regular expression rexp shall follow the
rules for basic regular expressions described in the Base Definitions
volume of IEEE Std 1003.1-2001, Section 9.3, Basic Regular Expressions.
The application shall use the sequence
"\/" to specify a slash character within the rexp. The
optional offset shall be a positive or negative integer
value representing a number of lines. A positive integer value can
be preceded by ’+’ . If the selection of lines from an
offset expression of this type would create a file with zero
lines, or one with greater than the number of lines left in the
input file, the results are unspecified. After the section is created,
the current line shall be set to the line that results from
the evaluation of the regular expression with any offset applied.
If the current line is the first line in the file and a regular
expression operation has not yet been performed, the pattern match
of rexp shall be applied from the current line to the end
of the file. Otherwise, the pattern match of rexp shall be applied
from the line following the current line to the end of
the file.
%rexp%[offset]
Equivalent to /rexp/[offset], except that
no file shall be created for the selected section of the
input file. The application shall use the sequence "\%" to
specify a percent-sign character within the rexp.
line_no
Create a file from the current line up to (but not including) the
line number line_no. Lines in the file shall be
numbered starting at one. The current line becomes line_no.
{num}
Repeat operand. This operand can follow any of the operands described
previously. If it follows a rexp type operand,
that operand shall be applied num more times. If it follows
a line_no operand, the file shall be split every
line_no lines, num times, from that point.
An error shall be reported if an operand does not reference a line
between the current position and the end of the file.
The following environment variables shall affect the execution of
csplit:
LANG
Provide a default value for the internationalization variables that
are unset or null. (See the Base Definitions volume of
IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables
for
the precedence of internationalization variables used to determine
the values of locale categories.)
LC_ALL
If set to a non-empty string value, override the values of all the
other internationalization variables.
LC_COLLATE
Determine the locale for the behavior of ranges, equivalence classes,
and multi-character collating elements within regular
expressions.
LC_CTYPE
Determine the locale for the interpretation of sequences of bytes
of text data as characters (for example, single-byte as
opposed to multi-byte characters in arguments and input files) and
the behavior of character classes within regular
expressions.
LC_MESSAGES
Determine the locale that should be used to affect the format and
contents of diagnostic messages written to standard
error.
NLSPATH
Determine the location of message catalogs for the processing of LC_MESSAGES
.
After editing the split files, they can be recombined as follows:
cat cobol0[0-3] > file
Note that this example overwrites the original file.
2.
This example would split the file after the first 99 lines, and every
100 lines thereafter, up to 9999 lines; this is because
lines in the file are numbered from 1 rather than zero, for historical
reasons:
csplit -k file 100 {99}
3.
Assuming that prog.c follows the C-language coding convention
of ending routines with a ’}’ at the beginning of
the line, this example creates a file containing each separate C routine
(up to 21) in prog.c:
The -n option was added to extend the range of filenames that
could be handled.
Consideration was given to adding a -a flag to use the alphabetic
filename generation used by the historical split utility, but
the functionality added by the -n option was deemed to make
alphabetic naming unnecessary.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .
IEEE/The Open Group
CSPLIT (P)
2003
Generated by OpenAsthra.com from man1p/csplit.1p using man macros.
