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rudi

Which process is making use of COMn?

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rudi

Hi.

Is there some function (or UDF) that can be used to reveal, which currently running process is using (=blocking) a certain COM port?

If it's in the help file, I missed it...

Regards, Rudi.


Earth is flat, pigs can fly, and Nuclear Power is SAFE!

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Joon

How about netstat.exe with -b option?

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rover

Hi.

Is there some function (or UDF) that can be used to reveal, which currently running process is using (=blocking) a certain COM port?

If it's in the help file, I missed it...

Regards, Rudi.

extensive code required to do this.

check the Sysinternals forum: http://forum.sysinternals.com/topic18892.html

the handles.exe command line utility can be used to search for "serial", and will return pid of process

Sysinternals process explorer also has a handle find utility

http://technet.microsoft.com/en-us/sysinternals/cb56073f-62a3-4ed8-9dd6-40c84cb9e2f5.aspx


I see fascists...

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rudi

Hi.

the handles.exe command line utility can be used to search for "serial", and will return pid of process

[snip process explorer]

When opening HYPERTRM.EXE, using COM1, this is the nice output:

C:\temp\handle>handle -a serial

Handle v3.46
Copyright (C) 1997-2011 Mark Russinovich
Sysinternals - www.sysinternals.com

hypertrm.exe       pid: 7920   type: Key             F4: HKLM\HARDWARE\DEVICEMAP\SERIALCOMM
hypertrm.exe       pid: 7920   type: File           170: \Device\Serial0
hypertrm.exe       pid: 7920   type: Key            198: HKLM\HARDWARE\DEVICEMAP\SERIALCOMM

That's exactly, what I was looking for, thanks! :)

Regards, Rudi.

keywords: com comport serial line open opened blocked occupied process program comx comn com1 com2 com3 com4 handle in use


Earth is flat, pigs can fly, and Nuclear Power is SAFE!

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guinness

Currently I use Handle.exe to enumerate the list of open file handles, but it would be useful to have a Function. So maybe one day I will have a go at tackling that Example rover found to AutoIt code. :)


UDF List:

 
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Updated: 22/04/2018

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