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COL(1)			  BSD General Commands Manual			COL(1)

     col -- filter reverse line	feeds from input

     col [-bfpx] [-l num]

     Col filters out reverse (and half reverse)	line feeds so the output is in
     the correct order with only forward and half forward line feeds, and re-
     places white-space	characters with	tabs where possible.  This can be use-
     ful in processing the output of nroff(1) and tbl(1).

     Col reads from standard input and writes to standard output.

     The options are as	follows:

     -b	    Do not output any backspaces, printing only	the last character
	    written to each column position.

     -f	    Forward half line feeds are	permitted (``fine'' mode).  Normally
	    characters printed on a half line boundary are printed on the fol-
	    lowing line.

     -p	    Force unknown control sequences to be passed through unchanged.
	    Normally, col will filter out any control sequences	from the input
	    other than those recognized	and interpreted	by itself, which are
	    listed below.

     -x	    Output multiple spaces instead of tabs.

     -lnum  Buffer at least num	lines in memory.  By default, 128 lines	are

     The control sequences for carriage	motion that col	understands and	their
     decimal values are	listed in the following	table:

     ESC-7	      reverse line feed	(escape	then 7)
     ESC-8	      half reverse line	feed (escape then 8)
     ESC-9	      half forward line	feed (escape then 9)
     backspace	      moves back one column (8); ignored in the	first column
     carriage return  (13)
     newline	      forward line feed	(10); also does	carriage return
     shift in	      shift to normal character	set (15)
     shift out	      shift to alternate character set (14)
     space	      moves forward one	column (32)
     tab	      moves forward to next tab	stop (9)
     vertical tab     reverse line feed	(11)

     All unrecognized control characters and escape sequences are discarded.

     Col keeps track of	the character set as characters	are read and makes
     sure the character	set is correct when they are output.

     If	the input attempts to back up to the last flushed line,	col will dis-
     play a warning message.

     expand(1),	nroff(1), tbl(1)

     The col utility conforms to the Single UNIX Specification,	Version	2. The
     -l	option is an extension to the standard.

     A col command appeared in Version 6 AT&T UNIX.

BSD				 June 17, 1991				   BSD


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