col man page on 4.4BSD

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

     col — filter reverse line feeds from input

     col [-bfx] [-l num]

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

     Col reads from the standard input and writes to the 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).  Nor‐
	       mally characters printed on a half line boundary are printed on
	       the following line.

     -x	       Output multiple spaces instead of tabs.

     -l num    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)

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

BSD				 June 29, 1993				   BSD

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