fspec man page on SmartOS

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FSPEC(4)							      FSPEC(4)

       fspec - format specification in text files

       It  is  sometimes  convenient to maintain text files on the system with
       non-standard tabs, (tabs that are not set at every eighth column). Such
       files  must  generally be converted to a standard format, frequently by
       replacing all tabs with the appropriate number of spaces,  before  they
       can  be	processed by 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 con‐
       sists  of  a  keyletter,	 possibly followed immediately by a value. The
       following parameters are recognized:

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

		      o	     A	list  of  column  numbers separated by commas,
			     indicating tabs set at the specified columns.

		      o	     A '−' followed immediately by an integer n, indi‐
			     cating tabs at intervals of n columns.

		      o	     A	'−'  followed  by the name of a ``canned'' tab
		  Standard  tabs  are  specified  by  t−8,  or	 equivalently,
		  t1,9,17,25,  etc.  The  canned  tabs that are recognized are
		  defined by the tabs(1) command.

		  The s 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 prepended.

		  The m parameter specifies a number of spaces to be prepended
		  to each line. The value of margin must be an integer.

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

		  The  e 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, which are assumed for parameters not supplied, are t−8
       and m0. If the s parameter is not specified, no size checking  is  per‐
       formed.	If the first line of a file does not contain a format specifi‐
       cation, the above defaults are assumed for the entire file. The follow‐
       ing is an example of a line containing a format specification:

       * <:t5,10,15 s72:> *

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

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

				  Jul 3, 1990			      FSPEC(4)

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