col man page on NeXTSTEP

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COL(1)									COL(1)

NAME
       col - filter reverse line feeds

SYNOPSIS
       col [ -bfh ]

DESCRIPTION
       Col  reads  the	standard  input	 and  writes  the standard output.  It
       performs the line overlays implied by  reverse  line  feeds  (ESC-7  in
       ASCII)  and  by	forward and reverse half line feeds (ESC-9 and ESC-8).
       Col is particularly useful for filtering multicolumn output  made  with
       the  `.rt' command of nroff and output resulting from use of the tbl(1)
       preprocessor.

       Although col accepts half line motions in its input, it	normally  does
       not emit them on output.	 Instead, text that would appear between lines
       is moved to the next lower full line boundary.  This treatment  can  be
       suppressed  by  the  -f (fine) option; in this case the output from col
       may contain forward half line  feeds  (ESC-9),  but  will  still	 never
       contain either kind of reverse line motion.

       If the -b option is given, col assumes that the output device in use is
       not capable of backspacing.  In this case, if several characters are to
       appear in the same place, only the last one read will be taken.

       The control characters SO (ASCII code 017), and SI (016) are assumed to
       start and end text in an alternate character set.   The	character  set
       (primary	 or alternate) associated with each printing character read is
       remembered; on  output,	SO  and	 SI  characters	 are  generated	 where
       necessary to maintain the correct treatment of each character.

       If  the -h option is given, col converts white space to tabs to shorten
       printing time.

       All control  characters	are  removed  from  the	 input	except	space,
       backspace,  tab, return, newline, ESC (033) followed by one of 7, 8, 9,
       SI, SO, and VT (013).  This last character is an alternate form of full
       reverse	 line	feed,  for  compatibility  with	 some  other  hardware
       conventions.  All other non-printing characters are ignored.

SEE ALSO
       troff(1), tbl(1)

BUGS
       Can't back up more than 128 lines.
       No more than 800 characters, including backspaces, on a line.

7th Edition			 May 16, 1986				COL(1)
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