From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Sat, 12 Apr 2008 17:30:51 -0700 (PDT) From: ramkumar gollamudi To: bluez-users@lists.sourceforge.net MIME-Version: 1.0 Message-ID: <794890.52004.qm@web31005.mail.mud.yahoo.com> Subject: [Bluez-users] Read error from /dev/rfcomm0 Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1452726111==" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net --===============1452726111== Content-Type: multipart/alternative; boundary="0-1847138742-1208046651=:52004" --0-1847138742-1208046651=:52004 Content-Type: text/plain; charset=us-ascii 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 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --0-1847138742-1208046651=:52004 Content-Type: text/html; charset=us-ascii

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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