[Bluez-users] Read error from /dev/rfcomm0

[ramkumar gollamudi <rgollamudi@yahoo.com>]

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Hello,
I have a problem reading from the file /dev/rfcomm0 after the tty was created when a remote device connected to my linux PC which was executing the rfcomm listen command. 

rfcomm listen 0 1 testreadapp {}

When the remote device connected to this local device my test application "testreadapp" was launched by the rfcomm utility. In this testreadapp application I open the /dev/rfcomm0 file and attempt to do a file read. It consistently failed and the read() returned 0 bytes. 

On the contrary if I launched testwriteapp after the rfcomm listen command, the testwriteapp not only successfully opened the /dev/rfcomm0 file but also wrote into the file successful. The data then got transmitted across the bluetooth link and were received successfully by the remote device.

I have two questions....

1) How do I got my testreadapp to successfully read from the /dev/rfcomm0 file?
2) Both testreadapp and testwriteapp are currently implemented in C. Are there any issues if I implement them in Java? I understand that execvp does not pass the "{}" argument to java applications. Are there ways to get around the issue?

I will be greatly appreciative if somebody can please help me address this issues. Thanks very much.

-Cheers,
Ram

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