From: Robert Gilaard <rgilaard@...>
Date: 2005-11-03T22:25:19+09:00
Subject: Re: execeute gawk from inside ruby script

Drop gawk, also right:-) I have enough to read and
try.
Thanks folks.

Brgds
Robert

--- Robert Klemme <bob.news@gmx.net> wrote:

> Hugh Sasse wrote:
> > On Thu, 3 Nov 2005, Robert Gilaard wrote:
> >
> >> Dear folks,
> >>
> >> how can I execeute a awk (or any other script)
> from
> >> within ruby?
> >>
> >> Currently I'm looking into the exec and fork part
> of
> >> the kernel class but I'm not too sure I'm on the
> right
> >> trach.
> >
> > That is a right track, but not the only one.
> >>
> >> The while loop in the script looks like this in
> test:
> >>
> >> while i<=202
> >> location<< "#{i}"
> >> exec "gawk -f fix_creacity.awk $location>
> defile.txt"
> >>
> >> i=i+1
> >> location="snapshot"
> >> end
> >>
> >> But in the ruby book I have seen that after the
> ruby
> >> script doesn't get after the exec.
> >
> > Exec overlays the process with the new one. fork()
> duplicates the
> > process then when the child execs you have two
> different ones.
> > The parent then wait for the child process to die.
> >>
> >> But I want to repeat this a few times so what
> could I
> >> do? Every time the while statement gets executed,
> I
> >> would like a new output file.
> >
> > To save on the apparent complexities of fork and
> exec, look at
> > system(), and look at
> >
> >   (0).upto(202) do |i|
> >     %x{gawk -f fix_creacity.awk #{location}#{i}>
> defile.txt}
> >   end
> >
> > For more fun look at open and what it says about
> "| ...", and for
> > deeper exploration of this realm look at popen.
> 
> Pretty complete list.  I'd like to add "drop (g)awk
> and do it in Ruby" as
> an option though. :-)
> 
> Kind regards
> 
>     robert
> 
> 
> 



		
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