csplit

Split a file into context-determined pieces.

SYNTAX
     csplit [options]... FILE PATTERN...

Output pieces of FILE separated by PATTERN(s) to files 'xx00', 'xx01', ..., and output byte counts of each piece to standard output. (standard input if FILE is - ).

Options

-f PREFIX
--prefix=PREFIX
     Use PREFIX as the output file name prefix.

-b SUFFIX
--suffix=SUFFIX
     Use SUFFIX as the output file name suffix.  When this option is
     specified, the suffix string must include exactly one
     `printf(3)'-style conversion specification, possibly including
     format specification flags, a field width, a precision
     specifications, or all of these kinds of modifiers.  The format
     letter must convert a binary integer argument to readable form;
     thus, only `d', `i', `u', `o', `x', and `X' conversions are
     allowed.  The entire SUFFIX is given (with the current output file
     number) to `sprintf(3)' to form the file name suffixes for each of
     the individual output files in turn.  If this option is used, the
     `--digits' option is ignored.

-n DIGITS
--digits=DIGITS
     Use output file names containing numbers that are DIGITS digits
     long instead of the default 2.

-k
--keep-files
     Do not remove output files when errors are encountered.

-z
--elide-empty-files
     Suppress the generation of zero-length output files.  (In cases
     where the section delimiters of the input file are supposed to
     mark the first lines of each of the sections, the first output
     file will generally be a zero-length file unless you use this
     option.)  The output file sequence numbers always run
     consecutively starting from 0, even when this option is specified.

-s
-q
--silent
--quiet
     Do not print counts of output file sizes.

Read standard input if FILE is -. Each PATTERN may be:

The contents of the output files are determined by the PATTERN arguments, as detailed below. An error occurs if a PATTERN argument refers to a nonexistent line of the input file (e.g., if no remaining line matches a given regular expression). After every PATTERN has been matched, any remaining input is copied into one last output file.

By default, `csplit' prints the number of bytes written to each output file after it has been created.

The types of pattern arguments are:

N
     Create an output file containing the input up to but not including
     line N (a positive integer).  If followed by a repeat count, also
     create an output file containing the next LINE lines of the input
     file once for each repeat.

/REGEXP/[OFFSET]
     Create an output file containing the current line up to (but not
     including) the next line of the input file that contains a match
     for REGEXP.  The optional OFFSET is a `+' or `-' followed by a
     positive integer.  If it is given, the input up to the matching
     line plus or minus OFFSET is put into the output file, and the
     line after that begins the next section of input.

%REGEXP%[OFFSET]
     Like the previous type, except that it does not create an output
     file, so that section of the input file is effectively ignored.

{REPEAT-COUNT}
     Repeat the previous pattern REPEAT-COUNT additional times.
     REPEAT-COUNT can either be a positive integer or an asterisk,
     meaning repeat as many times as necessary until the input is
     exhausted.

The output files' names consist of a prefix (`xx' by default) followed by a suffix. By default, the suffix is an ascending sequence of two-digit decimal numbers from `00' and up to `99'. In any case, concatenating the output files in sorted order by filename produces the original input file.

By default, if `csplit' encounters an error or receives a hangup, interrupt, quit, or terminate signal, it removes any output files that it has created so far before it exits.

Related:

cut - Divide a file into several parts
fmt - Reformat paragraph text
fold - Wrap input lines to fit in specified width
join - Join lines on a common field
paste - Merge lines of files
split - Split a file into fixed-size pieces
tail - Output the last part of files


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