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File Formats                                             fspec(4)



NAME
     fspec - format specification in text files

DESCRIPTION
     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  pro-
     cessed  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 consists of a  keyletter,  possibly  fol-
     lowed  immediately  by a value. The following parameters are
     recognized:

     ttabs           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, indicating tabs at intervals
                          of n columns.

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

                     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.



     ssize           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.



     mmargin         The m parameter specifies a number of spaces
                     to  be  prepended to each line. The value of



SunOS 5.10           Last change: 3 Jul 1990                    1






File Formats                                             fspec(4)



                     margin must be an integer.



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



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



     Default values, which are assumed for  parameters  not  sup-
     plied,  are t-8 and m0. If the s 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:

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


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

SEE ALSO
     ed(1), newform(1), tabs(1)






















SunOS 5.10           Last change: 3 Jul 1990                    2





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