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NAME    [Toc]    [Back]

       col - Filters text containing linefeeds

SYNOPSIS    [Toc]    [Back]

       col [-bfhpx] [-l number]

       The  col  command  reads from standard input and writes to
       standard output.

STANDARDS    [Toc]    [Back]

       Interfaces documented on this reference  page  conform  to
       industry standards as follows:

       col:  XCU5.0

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

OPTIONS    [Toc]    [Back]

       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.

OPERANDS    [Toc]    [Back]


DESCRIPTION    [Toc]    [Back]

       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

       [Tru64  UNIX]  The  col command is particularly useful for
       filtering multicolumn output made by  the  nroff  and  tbl

       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 characters.

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

NOTES    [Toc]    [Back]

       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.

EXIT STATUS    [Toc]    [Back]

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


       The  following  environment variables affect the execution
       of col: Provides 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 variables contain
 an invalid setting, the utility behaves as if none of
       the  variables  had  been  defined.  If set to a non-empty
       string value, overrides 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 multibyte
       characters in arguments).  Determines the locale  for  the
       format  and  contents  of  diagnostic  messages written to
       standard error.  Determines the location of message  catalogues
 for the processing of LC_MESSAGES.

SEE ALSO    [Toc]    [Back]

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

       Standards:  standards(5)

[ Back ]
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