phpman > perldoc > Filter::exec(3pm)

NAME
    Filter::exec - exec source filter

SYNOPSIS
        use Filter::exec qw(command parameters) ;

DESCRIPTION
    This filter pipes the current source file through the program which corresponds to the "command"
    parameter.

    As with all source filters its scope is limited to the current source file only. Every file you
    want to be processed by the filter must have a

        use Filter::exec qw(command ) ;

    near the top.

    Here is an example script which uses the filter:

        use Filter::exec qw(tr XYZ PQR) ;
        $a = 1 ;
        print "XYZ a = $a\n" ;

    And here is what it will output:

        PQR = 1

WARNING
    You should be *very* careful when using this filter. Because of the way the filter is
    implemented it is possible to end up with deadlock.

    Be especially careful when stacking multiple instances of the filter in a single source file.

AUTHOR
    Paul Marquess

DATE
    11th December 1995.