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Date:	Thu, 4 Aug 2005 16:50:20 -0400 (EDT)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	Jason Pyeron <jpyeron AT pdinc DOT us>
cc:	cygwin AT cygwin DOT com
Subject:	Re: pid confusion and pstree (Attn: User's Guide maintainer)
In-Reply-To:	<Pine.LNX.4.62.0508041626100.25913@ns.pyerotechnics.com>
Message-ID:	<Pine.GSO.4.61.0508041640550.3695@slinky.cs.nyu.edu>
References:	<Pine DOT LNX DOT 4 DOT 62 DOT 0508041520500 DOT 25913 AT ns DOT pyerotechnics DOT com> <Pine DOT GSO DOT 4 DOT 61 DOT 0508041531470 DOT 3695 AT slinky DOT cs DOT nyu DOT edu> <Pine DOT LNX DOT 4 DOT 62 DOT 0508041538440 DOT 25913 AT ns DOT pyerotechnics DOT com> <Pine DOT GSO DOT 4 DOT 61 DOT 0508041617420 DOT 3695 AT slinky DOT cs DOT nyu DOT edu> <Pine DOT LNX DOT 4 DOT 62 DOT 0508041626100 DOT 25913 AT ns DOT pyerotechnics DOT com>
MIME-Version:	1.0

On Thu, 4 Aug 2005, Jason Pyeron wrote:

> On Thu, 4 Aug 2005, Igor Pechtchanski wrote:
>
> > On Thu, 4 Aug 2005, Jason Pyeron wrote:
> >
> > > On Thu, 4 Aug 2005, Igor Pechtchanski wrote:
> > >
> > > > On Thu, 4 Aug 2005, Jason Pyeron wrote:
> > > >
> > > > > sorry if this wraps.
> > > > >
> > > > > what is my WINPID for the current bash?
> > > > >
> > > > > [jpyeron AT mrlaptop mysql-4.1.13.new]$ ps -W | head -1 && ps -W | grep bash && pstree -Ahup
> > > > >       PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
> > > > > I    2356       1    2356       2356  con 1003   Jul 31 /usr/bin/bash
> > > > >       260       0       0        260    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> > > > >       484       0       0        484    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> > > > >      3004       0       0       3004    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> > > > >       456       0       0        456    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> > > >
> > > > "ps -W" may not be aware of the Cygwin PID for some processes.
> > > > How about "/bin/ps | head -1 && /bin/ps -a | grep $$" instead?
> >
> > Yes, the Cygwin PID and the WINPID are different in most cases.  Doesn't
> > the command I suggested show the right WINPID for the current bash?
>
> if there is a -aW then no, -a yes

That's why I said "-a", not "-aW"... :-)

> hmmm? why are there zeros on the PGID, and why when using -W does PID change
> to WINPID? BUG?

See "man ps" and <http://cygwin.com/cygwin-ug-net/cygwin-ug-net.html#ps>.

> [jpyeron AT mrlaptop mysql-4.1.13.new]$ ps |  head -1
>       PID    PPID    PGID     WINPID  TTY  UID    STIME COMMAND
> [jpyeron AT mrlaptop mysql-4.1.13.new]$ ps -a | grep 1592
>      1592     228    1592        456    3 1003   Aug  3 /usr/bin/bash
> S    2872    1592    2872       3124    3 1003 14:58:27 /usr/bin/pico
>      2464    1592    3316       2464    3 1003 16:27:32 /usr/bin/bash
>      3316    1592    3316       2472    3 1003 16:27:32 /usr/bin/ps

There you go, it works.

> [jpyeron AT mrlaptop mysql-4.1.13.new]$ ps -W | grep 456
>       456       0       0        456    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> [jpyeron AT mrlaptop mysql-4.1.13.new]$ ps -aW | grep 456
>       456       0       0        456    ?    0   Aug  3 C:\cygwin\bin\bash.exe
> [jpyeron AT mrlaptop mysql-4.1.13.new]$

-W means "all Windows processes".  IIRC, the "-a" is ignored when -W is
specified.
HTH,
	Igor
P.S. Note to the UG maintainer: Joshua, there's a typo in the description
of "ps" on the above referenced page: "synonomous" should be "synonymous".
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

If there's any real truth it's that the entire multidimensional infinity
of the Universe is almost certainly being run by a bunch of maniacs. /DA

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