CentOS 7.0 - man page for filter::exec (centos section 3)
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Filter::exec(3) User Contributed Perl Documentation Filter::exec(3)
Filter::exec - exec source filter
use Filter::exec qw(command parameters) ;
This filter pipes the current source file through the program which corresponds to the
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
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
11th December 1995.
perl v5.16.3 2013-03-29 Filter::exec(3)
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