NAME
csplit —
split files based on
context
SYNOPSIS
csplit |
[-ks]
[-f
prefix]
[-n
number] file args
... |
DESCRIPTION
The
csplit utility splits
file into
pieces using the patterns
args. If
file is a dash (‘-’),
csplit reads from standard input.
Files are created with a prefix of “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
HUP
,
INT
, or
TERM
signal is
received, all files previously written are removed.
The options are as follows:
-
-
- -f
prefix
- Create file names beginning with
prefix, instead of “xx”.
-
-
- -k
- Do not remove previously created files if an error occurs
or a
HUP
, INT
, or
TERM
signal is received.
-
-
- -n
number
- Create file names beginning with
number of decimal digits after the prefix, instead
of 2.
-
-
- -s
- Do not write the size of each output file to standard
output as it is created.
The
args operands may be a combination of the following
patterns:
-
-
- /regexp/[[+|-]offset]
- 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 offset from the line that
matched may be specified.
-
-
- %regexp%[[+|-]offset]
- Same as above but a file is not created for the
output.
-
-
- line_no
- Create containing the input from the current line to (but
not including) the specified line number.
-
-
- {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
line_no lines, num times. The
first line of the file is line number 1 for historic reasons.
After all the patterns have been processed, the remaining input data (if there
is any) will be written to a new file.
Requesting to split at a line before the current line number or past the end of
the file will result in an error.
ENVIRONMENT
The
LANG
,
LC_ALL
,
LC_COLLATE
, and
LC_CTYPE
environment variables affect the execution of
csplit as
described in
environ(7).
EXIT STATUS
The
csplit utility exits 0 on success, and >0 if
an error occurs.
EXAMPLES
Split the
mdoc(7) file
foo.1 into one file for each section (up to 21 plus one for
the rest, if any):
$ csplit -k foo.1 '%^\.Sh%' '/^\.Sh/'
'{20}'
Split standard input after the first 99 lines and every 100 lines thereafter:
$ csplit -k - 100 '{19}'
SEE ALSO
sed(1),
split(1),
re_format(7)
STANDARDS
The
csplit utility conforms to
IEEE Std
1003.1-2004 (“POSIX.1”).
HISTORY
A
csplit command appeared in PWB UNIX.
BUGS
Input lines are limited to
LINE_MAX
(2048) bytes in
length.