Santosh Dawara wrote:
> I say "# java HelloWorld as root I then run ps uax | grep javadir"
>
> root 25181 98.7 1.4 20840 3708 pts/0 R 13:33 1:02
> /javadir/sun/jd
> root 25205 0.0 1.4 20840 3708 pts/0 S 13:33 0:00
> /javadir/sun/jd
> root 25206 0.0 1.4 20840 3708 pts/0 S 13:33 0:00
> /javadir/sun/jd
> root 25207 0.0 1.4 20840 3708 pts/0 S 13:33 0:00
> /javadir/sun/jd
> root 25208 0.0 1.4 20840 3708 pts/0 S 13:33 0:00
> /javadir/sun/jd
>
> Don't pay attention to the number of processes they vary all the time.
If using green threads solves the problem, then you probably didn't really have
a problem. All those "processes" are really threads, and they should all share
the same privileges, despite what ps reported. If they do not (you might try a
test to see), then there is a bug in Linux threads.
Nathan
>
> I say "# java -green HelloWorld as root I then run ps uax | grep
> javadir"
>
> root 26281 98.7 1.4 20840 3708 pts/0 R 12:11 1:02
> /javadir/sun/jd
>
> Then If I Insert the Native code to su down to nobody
>
> I say "# java -green HelloWorld as root I then run ps uax | grep
> javadir"
>
> nobody 30052 98.7 1.4 20840 3708 pts/0 R 11:33 1:02
> /javadir/sun/jd
>
> Thank you, that solves the problem, I read up on 'green' after you
> posted
> to the list, I used it and viola ...
>
> Thanks everybody for the timely Feedback ...
>
> Regards,
> Santosh Dawara
>
> Joi Ellis wrote:
> >
> > On Thu, 14 Sep 2000, Santosh Dawara wrote:
> >
> > > Nathan Meyers wrote:
> > > >
> > > > You use 'forks' in quotes. Are they processes or threads? How were
> > > > they created?
> > >
> > > Proper Linux Processes, If you said "java Helloworld" for the simplest
> > > of
> > > code , 'ps uax ' will tell you 4 new Processes were Spawned , I am
> > > guessing they are for the JVMs Internal book keeping and for executing
> > > the code
> >
> > Keep in mind what flavor threads your JVM is using. Green threads are
> > user threads and are invisible on a ps display. Native threads are
> > tracked in ps as if they were separate processes but they are (apparently)
> > different. When I run JBuilder on 1.2.2/green, I get one process.
> > When I run it on 1.3/native, I get 6. You should see 'em breed like
> > rabbits when I run apps in the debugger...
>
>
> > I'd be curious to see if your other three threads really still have
> > root's euid after the 'fork' or if ps is just not updating some value
> > in its display properly.
> >
> > On the other hand... why can't you drop the euid in each thread after
> > the fork, and/or before the fork? Surely it doesn't require root privs
> > to call fork()? (Fork? In Java? What are we talking about, anyway?)
> >
> > --
> > Joi Ellis Software Engineer
> > Aravox Technologies [EMAIL PROTECTED], [EMAIL PROTECTED]
> >
> > No matter what we think of Linux versus FreeBSD, etc., the one thing I
> > really like about Linux is that it has Microsoft worried. Anything
> > that kicks a monopoly in the pants has got to be good for something.
> > - Chris Johnson
> >
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