If port is unavailable then which service is listening on that port

hi all
I am writing one module to check 1) which ports are available in system and 2) if port is unavailable then which service is listening on that port. I want to run that module on Windows platform and also UNIX platform.
I have done first part but i am not finding way to do the second part. Is there any way in Java or any other prog language (C, C++) to do so. please share idea or code i am awaiting for response.
Thanks in advance :)
Message was edited by:
Codeword_Swan

Under Unix there is the command "fuser" to tell which process has open a given file. With -n you can tell another space like tcp for sockets. Thus:
$ fuser -n tcp 7777
here: 7777
7777/tcp:             3753
$ ps -p 3753 -f
UID        PID PPID C STIME TTY          TIME CMD
oracle    3753 3722 0 Aug28 ?        00:00:53 /opt/oracle/product/AS/10g/R2/webcache/bin/webcached -OPMN -U 1325072547

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Attachments:
digital_ud.c ‏4 KB

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hi friend
read this one
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Verify correct port in javascript for wcf service

down votefavorite
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Hello,
>is there a specific port number I cannot use?
NO, there is no such port num. You can use any port number for your site and WCF service.
>Is there a way to find the port number of the Site URL
You can find port from central admin.
http://msdn.microsoft.com/en-in/library/hh167832%28v=nav.70%29.aspx
Hope it could help
Hemendra:Yesterday is just a memory,Tomorrow we may never see
Please remember to mark the replies as answers if they help and unmark them if they provide no help

If port is unavailable then which service is listening on that port

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