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EXPAND(1)		  BSD General Commands Manual		     EXPAND(1)

NAME
     expand, unexpand -- expand	tabs to	spaces,	and vice versa

SYNOPSIS
     expand [-t	tab1,tab2,...,tabn] [file ...]
     unexpand [-a] [-t tab1,tab2,...,tabn] [file ...]

DESCRIPTION
     The expand	utility	processes the named files or the standard input	writ-
     ing the standard output with tabs changed into blanks.  Backspace charac-
     ters are preserved	into the output	and decrement the column count for tab
     calculations.  The	expand utility is useful for pre-processing character
     files (before sorting, looking at specific	columns, etc.) that contain
     tabs.

     The unexpand utility puts tabs back into the data from the	standard input
     or	the named files	and writes the result on the standard output.

     The following options are available:

     -a	     (unexpand only) By	default, only leading blanks and tabs are re-
	     converted to maximal strings of tabs.  If the -a option is	given,
	     then tabs are inserted whenever they would	compress the resultant
	     file by replacing two or more characters.

     -t	tab1,tab2,...,tabn
	     Set tab stops at column positions tab1, tab2, ...,	tabn.  If only
	     a single number is	given, tab stops are set that number of	column
	     positions apart instead of	the default number of 8.

ENVIRONMENT
     The LANG, LC_ALL and LC_CTYPE environment variables affect	the execution
     of	expand and unexpand as described in environ(7).

DIAGNOSTICS
     The expand	and unexpand utilities exit 0 on success, and >0 if an error
     occurs.

STANDARDS
     The expand	and unexpand utilities conform to IEEE Std 1003.1-2001
     ("POSIX.1").

HISTORY
     The expand	command	appeared in 3.0BSD.

BSD				April 21, 2002				   BSD

NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | DIAGNOSTICS | STANDARDS | HISTORY

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