From: Ehsanul Hoque <ehsanul_g3@...>
Date: 2009-09-11T18:35:09+09:00
Subject: Re: Can not catch PTY::ChildExited exception

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Denis=2C

That's a good reason=2C exactly the same reason I needed to find out so muc=
h about PTY in fact.=20

As for Process.wait=2C as long as you have the pid=2C it should work. I tri=
ed it out in irb now=2C and it seems to work. But you will get the child ex=
ited exception still. I hadn't thought of this in my explanation=2C it's de=
finitely a better way to wait for the process to finish compared to my "t.j=
oin". Here's what I tried in irb:

def test
a=2Cb=2Cpid =3D PTY.spawn("sleep 5")
Process.wait(pid)
end
test

> Date: Fri=2C 11 Sep 2009 17:12:27 +0900
> From: denis.berezhnoy@gmail.com
> Subject: Re: Can not catch PTY::ChildExited exception
> To: ruby-talk@ruby-lang.org
>=20
> Denis Berezhnoy wrote:
> > Ehsanul Hoque wrote:
> >> Well=2C I'm sure I have nowhere as good an idea of PTY.spawn() as=20
> >> Matsumoto does=2C but let me try to explain what your code is doing=2C=
 and=20
> >> how to get your desired result.
> >>=20
> >> First=2C you might want to consider using other methods for what you'r=
e=20
> >> doing. You probably don't really need a pseudo terminal=2C which is wh=
at=20
> >> PTY gives you=2C and you can use more well documented methods.=20
> >=20
> > Hi Ehsan=2C
> >=20
> > Thanks for detailed explanation. The reason why I use PTY is because I
> > need to interact with application that does not flush its output to
> > pipe.  So when I use IO.popen or IO.pipe there is no output.
> >=20
> > PTY.spawn() solves this problem so I use it intentionally.
> >=20
> > Best regards=2C
> > Denis
>=20
> Hi Ehsan=2C
>=20
> One more question.   Can I use Process.wait to wait for termination of=20
> the process which was run by PTY.spawn?
>=20
> Best regards=2C
> Denis
> --=20
> Posted via http://www.ruby-forum.com/.
>=20

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