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OpenSolaris 2009.06 - man page for col (opensolaris section 1)

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col(1)					  User Commands 				   col(1)

NAME
       col - reverse line-feeds filter

SYNOPSIS
       col [-bfpx]

DESCRIPTION
       The  col  utility reads from the standard input and writes to the standard output. It per-
       forms the line overlays implied by reverse line-feeds, and by forward  and  reverse  half-
       line-feeds.  Unless -x is used, all blank characters in the input will be converted to tab
       characters wherever possible. col is particularly useful for filtering multi-column output
       made  with  the	.rt  command of nroff(1) and output resulting from use of the tbl(1) pre-
       processor.

       The ASCII control characters SO and SI are assumed by col to start  and	end  text  in  an
       alternative  character  set.  The  character  set to which each input character belongs is
       remembered, and on output SI and SO characters are generated as appropriate to ensure that
       each character is written in the correct character set.

       On  input, the only control characters accepted are space, backspace, tab, carriage-return
       and newline characters, SI, SO, VT, reverse line-feed, forward half-line-feed and  reverse
       half-line-feed.	The  VT  character  is	an  alternative  form  of full reverse line-feed,
       included for compatibility with some earlier programs of this type. The only other charac-
       ters to be copied to the output are those that are printable.

       The ASCII codes for the control functions and line-motion sequences mentioned above are as
       given in the table below. ESC stands for the ASCII escape character, with the  octal  code
       033; ESC- means a sequence of two characters, ESC followed by the character x.

       reverse line-feed	     ESC-7
       reverse half-line-feed	     ESC-8
       forward half-line-feed	     ESC-9
       vertical-tab (VT)	     013
       start-of-text (SO)	     016
       end-of-text (SI) 	     017

OPTIONS
       -b     Assume  that  the output device in use is not capable of backspacing. In this case,
	      if two or more characters are to appear in the same place, only the last	one  read
	      will be output.

       -f     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.

       -p     Normally,  col will ignore any escape sequences unknown to it that are found in its
	      input; the -p option may be used to cause col to output these sequences as  regular
	      characters,  subject  to	overprinting  from  reverse line motions. The use of this
	      option is highly discouraged unless the user is fully aware of the textual position
	      of the escape sequences.

       -x     Prevent  col  from converting blank characters to tab characters on output wherever
	      possible. Tab stops are considered to be at each column position n such that n mod-
	      ulo 8 equals 1.

ENVIRONMENT VARIABLES
       See  environ(5)	for  descriptions  of the following environment variables that affect the
       execution of col: LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS
       The following error values are returned:

       0      Successful completion.

       >0     An error occurred.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       nroff(1), tbl(1), ascii(5), attributes(5), environ(5)

NOTES
       The input format accepted by col matches the output produced by nroff with either the -T37
       or  -Tlp  options.  Use -T37 (and the -f option of col) if the ultimate disposition of the
       output of col will be a device that can interpret half-line motions, and -Tlp otherwise.

       col cannot back up more than 128 lines or handle more than 800 characters per line.

       Local vertical motions that would result in backing up over the first line of the document
       are ignored. As a result, the first line must not have any superscripts.

SunOS 5.11				    1 Feb 1995					   col(1)
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