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Is there a way to spawn a program from perl that is independent?
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Is there a way to spawn a program from perl that is independent? Tom Wyley 08-02-2008
Posted by Tom Wyley on August 2, 2008, 12:10 pm
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 That is...

Backtics and System will start up a new program but it is modal - to get
back to the original script the spawned program must be closed.

Exec kills the original script when the spawned program starts up.

I want a script to throw off another script and go on with its business.

It would appear that Fork might the the answer, but so far RTFM'ing about
Fork is getting me even more confused.

Any other way?

Thanks
Tom W

Posted by Peter J. Holzer on August 4, 2008, 8:44 am
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> In Unix, you could background the other script in
> a subshell:
>
> 0 == system "(/path/to/other_script &)"
> or die "system failed: $?";
>
> But getting the return status of the backgrounded
> task would be messy

If you use open with mode '-|' or '|-' it isn't messy at all: close
returns the return status. It also avoids the additional shell. You need
to take care about the input or output, which may add some
complications.

        hp

Posted by comp.lang.c++ on August 4, 2008, 3:14 pm
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>
> > In Unix, you could background the other script in
> > a subshell:
>
> > 0 == system "(/path/to/other_script &)"
> > or die "system failed: $?";
>
> > But getting the return status of the backgrounded
> > task would be messy
>
> If you use open with mode '-|' or '|-' it isn't messy at all: close
> returns the return status. It also avoids the additional shell. You need
> to take care about the input or output, which may add some
> complications.
>

True. I was just guessing from the OP's description "throw off
another
script and go on with its business", he just wanted a "spawn and
forget"
type background action. (with no interaction and possibly no concern
about status as well),

--
Charles DeRykus
Charles DeRykus


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