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authorIndrajith K L2022-12-03 17:00:20 +0530
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+split(P) split(P)
+
+
+
+
+
+NAME
+ split - split files into pieces
+
+SYNOPSIS
+ split [-l line_count][-a suffix_length][file[name]]
+
+ split -b n[k|m][-a suffix_length][file[name]]
+
+
+DESCRIPTION
+ The split utility shall read an input file and write one
+ or more output files. The default size of each output
+ file shall be 1000 lines. The size of the output files
+ can be modified by specification of the -b or -l
+ options. Each output file shall be created with a unique
+ suffix. The suffix shall consist of exactly suf-
+ fix_length lowercase letters from the POSIX locale. The
+ letters of the suffix shall be used as if they were a
+ base-26 digit system, with the first suffix to be cre-
+ ated consisting of all 'a' characters, the second with a
+ 'b' replacing the last 'a' , and so on, until a name of
+ all 'z' characters is created. By default, the names of
+ the output files shall be 'x' , followed by a two-char-
+ acter suffix from the character set as described above,
+ starting with "aa" , "ab" , "ac" , and so on, and con-
+ tinuing until the suffix "zz" , for a maximum of 676
+ files.
+
+ If the number of files required exceeds the maximum
+ allowed by the suffix length provided, such that the
+ last allowable file would be larger than the requested
+ size, the split utility shall fail after creating the
+ last file with a valid suffix; split shall not delete
+ the files it created with valid suffixes. If the file
+ limit is not exceeded, the last file created shall con-
+ tain the remainder of the input file, and may be smaller
+ than the requested size.
+
+OPTIONS
+ The split 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:
+
+ -a suffix_length
+
+ Use suffix_length letters to form the suffix por-
+ tion of the filenames of the split file. If -a is
+ not specified, the default suffix length shall be
+ two. If the sum of the name operand and the suf-
+ fix_length option-argument would create a file-
+ name exceeding {NAME_MAX} bytes, an error shall
+ result; split shall exit with a diagnostic mes-
+ sage and no files shall be created.
+
+ -b n Split a file into pieces n bytes in size.
+
+ -b nk Split a file into pieces n*1024 bytes in size.
+
+ -b nm Split a file into pieces n*1048576 bytes in size.
+
+ -l line_count
+ Specify the number of lines in each resulting
+ file piece. The line_count argument is an
+ unsigned decimal integer. The default is 1000. If
+ the input does not end with a <newline>, the par-
+ tial line shall be included in the last output
+ file.
+
+
+OPERANDS
+ The following operands shall be supported:
+
+ file The pathname of the ordinary file to be split. If
+ no input file is given or file is '-' , the stan-
+ dard input shall be used.
+
+ name The prefix to be used for each of the files
+ resulting from the split operation. If no name
+ argument is given, 'x' shall be used as the pre-
+ fix of the output files. The combined length of
+ the basename of prefix and suffix_length cannot
+ exceed {NAME_MAX} bytes. See the OPTIONS section.
+
+
+STDIN
+ See the INPUT FILES section.
+
+INPUT FILES
+ Any file can be used as input.
+
+ENVIRONMENT VARIABLES
+ The following environment variables shall affect the
+ execution of split:
+
+ LANG Provide a default value for the internationaliza-
+ tion 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 cate-
+ gories.)
+
+ LC_ALL If set to a non-empty string value, override the
+ values of all the other internationalization
+ variables.
+
+ 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).
+
+ LC_MESSAGES
+ Determine the locale that should be used to
+ affect the format and contents of diagnostic mes-
+ sages written to standard error.
+
+ NLSPATH
+ Determine the location of message catalogs for
+ the processing of LC_MESSAGES .
+
+
+ASYNCHRONOUS EVENTS
+ Default.
+
+STDOUT
+ Not used.
+
+STDERR
+ The standard error shall be used only for diagnostic
+ messages.
+
+OUTPUT FILES
+ The output files contain portions of the original input
+ file; otherwise, unchanged.
+
+EXTENDED DESCRIPTION
+ None.
+
+EXIT STATUS
+ The following exit values shall be returned:
+
+ 0 Successful completion.
+
+ >0 An error occurred.
+
+
+CONSEQUENCES OF ERRORS
+ Default.
+
+ The following sections are informative.
+
+APPLICATION USAGE
+ None.
+
+EXAMPLES
+ In the following examples foo is a text file that con-
+ tains 5000 lines.
+
+ Create five files, xaa, xab, xac, xad, and xae:
+
+
+ split foo
+
+ Create five files, but the suffixed portion of the cre-
+ ated files consists of three letters, xaaa, xaab, xaac,
+ xaad, and xaae:
+
+
+ split -a 3 foo
+
+ Create three files with four-letter suffixes and a sup-
+ plied prefix, bar_aaaa, bar_aaab, and bar_aaac:
+
+
+ split -a 4 -l 2000 foo bar_
+
+ Create as many files as are necessary to contain at most
+ 20*1024 bytes, each with the default prefix of x and a
+ five-letter suffix:
+
+
+ split -a 5 -b 20k foo
+
+RATIONALE
+ The -b option was added to provide a mechanism for
+ splitting files other than by lines. While most uses of
+ the -b option are for transmitting files over networks,
+ some believed it would have additional uses.
+
+ The -a option was added to overcome the limitation of
+ being able to create only 676 files.
+
+ Consideration was given to deleting this utility, using
+ the rationale that the functionality provided by this
+ utility is available via the csplit utility (see csplit
+ ). Upon reconsideration of the purpose of the User
+ Portability Extension, it was decided to retain both
+ this utility and the csplit utility because users use
+ both utilities and have historical expectations of their
+ behavior. Furthermore, the splitting on byte boundaries
+ in split cannot be duplicated with the historical
+ csplit.
+
+ The text " split shall not delete the files it created
+ with valid suffixes" would normally be assumed, but
+ since the related utility, csplit, does delete files
+ under some circumstances, the historical behavior of
+ split is made explicit to avoid misinterpretation.
+
+FUTURE DIRECTIONS
+ None.
+
+SEE ALSO
+ csplit
+
+COPYRIGHT
+ Portions of this text are reprinted and reproduced in
+ electronic form from IEEE Std 1003.1, 2003 Edition,
+ Standard for Information Technology -- Portable Operat-
+ ing System Interface (POSIX), The Open Group Base Speci-
+ fications Issue 6, Copyright (C) 2001-2003 by the Insti-
+ tute 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.open-
+ group.org/unix/online.html .
+
+
+
+POSIX 2003 split(P)