col man page on DigitalUNIX

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col(1)									col(1)

       col - Filters text containing linefeeds

       col [-bfhpx] [-l number]

       The  col	 command reads from standard input and writes to standard out‐

       Interfaces documented on this reference page conform to industry	 stan‐
       dards as follows:

       col:  XCU5.0

       Refer  to  the  standards(5)  reference page for more information about
       industry standards and associated tags.

       Assumes that the output device in use is not  capable  of  backspacing.
       In this case, if two or more characters are to be displayed in the same
       position, only the last one that is read is displayed  in  the  output.
       This function is useful for converting nroff output to produce readable
       results on terminals or printers that do	 not  support  underlining  or
       overstriking characters.	 Suppresses the default treatment of half-line
       motions in the input.  Normally, col does not emit half-line motions on
       output,	although  it does accept them in its input.  With this option,
       output may contain forward half-linefeeds (<ESC-9>),  but  not  reverse
       linefeeds  (<ESC-7>  or <ESC-8>).  [Tru64 UNIX]	Compresses spaces into
       tabs. This is the default.  [Tru64 UNIX]	 Buffers at least number lines
       in  memory.   By	 default,  128	lines  are buffered.  Displays unknown
       escape sequences as characters, subject to  overprinting	 from  reverse
       line  motions.	Normally, col ignores them.  You should be fully aware
       of the textual position of escape sequences before you use this option.
       Outputs multiple spaces instead of tabs.


       The col command performs the line overlays implied by reverse linefeeds
       (ASCII <ESC-7>), and  by	 forward  and  reverse	half-linefeeds	(ASCII
       <ESC-9>	and  ASCII  <ESC-8>).  It also replaces white-space characters
       with tabs where possible.

       [Tru64 UNIX]  The col command is particularly useful for filtering mul‐
       ticolumn output made by the nroff and tbl commands.

       The col command assumes that the ASCII control characters SO (\017) and
       SI (\016) begin and end text in an alternate character  set.   The  col
       command	remembers  the	character set each input character belongs to,
       and on output generates SI and SO characters as appropriate  to	ensure
       that each character is printed in the correct character set.

       On  input,  the col command accepts only the control characters for the
       <Space>, <Backspace>, <Tab>, and <Return> keys; the newline  character;
       the  SI,	 SO,  and  VT  control	characters;  and  <ESC-7>, <ESC-8>, or
       <ESC-9>.	 The VT control character (\013) is an alternate form of  full
       reverse	linefeed included for compatibility with some earlier programs
       of this type.  The col command discards all other  nonprinting  charac‐

       [Tru64  UNIX]  If  the  input  attempts	to back up to the last flushed
       line, col displays a warning message.

       Depending on the printer, using the -x  option  may  increase  printing
       time.   Local  vertical	motion	that  causes a backwards move over the
       first line of input is ignored.	The first line of input may  not  have
       any superscripts.  This command is marked LEGACY in XCU Issue 5.

       The  following  exit  values  are  returned: Successful completion.  An
       error occurred.

       The following environment variables affect the execution of  col:  Pro‐
       vides  a	 default value for the internationalization variables that are
       unset or null. If LANG is unset or null, the corresponding  value  from
       the  default  locale is used.  If any of the internationalization vari‐
       ables contain an invalid setting, the utility behaves as if none of the
       variables  had been defined.  If set to a non-empty string value, over‐
       rides the values	 of  all  the  other  internationalization  variables.
       Determines  the	locale for the interpretation of sequences of bytes of
       text data as characters (for example, single-byte as opposed to	multi‐
       byte  characters	 in  arguments).  Determines the locale for the format
       and contents of diagnostic messages written to standard error.	Deter‐
       mines  the location of message catalogues for the processing of LC_MES‐

       Commands:  deroff(1), neqn(1), nroff(1), tbl(1)

       Standards:  standards(5)


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