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Date: Thu, 26 Jun 2008 16:31:20 +0300
From: "Borislav Ivanov" <borislav DOT g DOT ivanov AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Get the cygwin PID of a Win PID
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Hello,

I'm currently updating cygwin from 1.3.22 to 1.5.25 and I encountered
a problem with Winpids/Cygwinpids. I have a custom tool that checks if
a process is running by invoking kill(PID, 0). The PID is retrieved
from a PID file which all applications write on startup. On 1.3 I get
this:

d:\>ps -W | grep mysql
     1860       0       0       1860    ?    0 15:54:44
c:\mysql\bin\mysqld-nt.exe

and on 1.5 I get:

D:\>ps -W | grep mysql
     2744       1    1384       1980    ?   18 15:07:22
/drives/c/mysql/bin/mysqld-nt
     1980       0       0       1980    ?    0 15:07:23
c:\mysql\bin\mysqld-nt.exe

On both 1.3 and 1.5 my pid file contains the Winpid. The difference
here is that on 1.3 kill(Winpid, 0) succeeds but on 1.5 fails with
errno=ESRCH, while kill(Cygwinpid, 0) behaves as expected.

I searched through the list, but found only transition from cygwinpid
to winpid (by using winpid = cygwin_internal(CW_CYGWIN_PID_TO_WINPID,
pid)). Is there some analogue to retrieve the corresponding cygwinpid
of a winpid?

Thank you,
Borislav Ivanov

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