fspec man page on HP-UX

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fspec(4)							      fspec(4)

       fspec - format specification in text files

       It  is  sometimes convenient to maintain text files on the HP-UX system
       with non-standard tabs, (meaning tabs that are not set at every	eighth
       column).	  Generally, such files must be converted to a standard format
       − frequently by replacing all tabs with the appropriate number of  spa‐
       ces  − before they can be processed by HP-UX system commands.  A format
       specification occurring in the first line of a text file specifies  how
       tabs are to be expanded in the remainder of the file.

       A  format  specification consists of a sequence of parameters separated
       by blanks and surrounded by the brackets and Each parameter consists of
       a  keyletter,  possibly followed immediately by a value.	 The following
       parameters are recognized:

	      The	     parameter specifies tab settings  for  the	 file.
			     The value of tabs must be one of the following:

				  1.  A	 list  of  column numbers separated by
				      commas, indicating tabs set at the spec‐
				      ified columns;

				  2.  A	 followed immediately by an integer n,
				      indicating tabs at intervals of  n  col‐

				  3.  A	 followed  by the name of a ``canned''
				      tab specification.

			     Standard tabs are specified by  or	 equivalently,
			     etc.   Recognized	canned tabs are defined by the
			     command (see tabs(1)).

	      The	     parameter specifies a  maximum  line  size.   The
			     value  of size must be an integer.	 Size checking
			     is performed after tabs have been	expanded,  but
			     before the margin is inserted at the beginning of
			     the line.

	      The	     parameter specifies a  number  of	spaces	to  be
			     inserted  at  the	beginning  of  each line.  The
			     value of margin must be an integer.

	      The	     parameter takes no value.	Its presence indicates
			     that the line containing the format specification
			     is to be deleted from the converted file.

	      The	     parameter takes no value.	Its presence indicates
			     that  the current format is to prevail only until
			     another format specification  is  encountered  in
			     the file.

       Default	values	(assumed  for  parameters not supplied) are and If the
       parameter is not specified, no size  checking  is  performed.   If  the
       first line of a file does not contain a format specification, the above
       defaults are assumed for the entire file.  The following is an  example
       of a line containing a format specification:

       If a format specification can be disguised as a comment, it is not nec‐
       essary to code the parameter.

       Several HP-UX system commands correctly interpret the format specifica‐
       tion for a file.	 Among them is which can be used to convert files to a
       standard format acceptable to other HP-UX system commands.

       ed(1), newform(1), tabs(1).


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