|EXPAND(1)||General Commands Manual||EXPAND(1)|
expandprocesses the named files or the standard input, writing the standard output with tabs changed into blanks. Backspace characters are preserved into the output and decrement the column count for tab calculations.
expandis useful for pre-processing character files (before sorting, looking at specific columns, etc.) that contain tabs.
unexpand puts tabs back into the data from
the standard input or the named files and writes the result on the standard
The options are as follows:
unexpandonly) By default, only leading blanks and tabs are reconverted to maximal strings of tabs. If the
-aoption is given, tabs are inserted whenever they would compress the resultant file by replacing two or more characters.
expandonly) If the argument to
-t, tablist, consists of a single numerical argument, tabs are set tablist spaces apart instead of the default 8. If multiple
-toptions are given, then the tabs are set at those specific columns.
Otherwise the argument to
consist of a list of two or more positive decimal integers, comma
separated, in ascending order: in the event of having to process a
⟨tab⟩ at a position beyond the last of those specified in
-t list, the ⟨tab⟩ is
replaced by a single ⟨space⟩ character.
This implementation of
additionally allows tablist to be specified
without using the
-t flag, by prefixing
tablist with a dash (-).
unexpandutilities exit 0 on success or >0 if an error occurred.
unexpandutilities are compliant with the IEEE Std 1003.1-2008 (“POSIX.1”) specification, with the following exceptions:
unexpanddoes not recognise the
expandutility first appeared in 1BSD.
|December 28, 2011||OpenBSD-5.1|