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Re: BD-RE mount problem

On 10/08/12 01:50 AM, Thomas Schmitt wrote:

   fd = open("/dev/sr0", O_RDWR);
root@transponder:/home/garydale# ./open_sr0
open: fd= -1 , errno= 30
open: Read-only file system
This is surprising, because xorriso uses
    open(..., O_RDWR | O_NDELAY);
when it acquires a drive.
(I would have expected to see the error with write(), which xorriso
  does not use.)

Whay happens if you change the test program
-    fd = open("/dev/sr0", O_RDWR);
+    fd = open("/dev/sr0", O_RDWR | O_NDELAY);
compile it, and run again as superuser ?

Whatever, a BD-RE device with rw-permission on its device file should
not throw this error.
We need kernel expertise to find out what happens here.

Is anybody at debian-user able to give advise or propose experiments
which shed light on the problem ?

root@transponder:/home/garydale# ./open_sr0
open: fd= 3 , errno= 0
write: ret= 2048 , errno= 0

No one in Debian user has been able to shed any light on the problem.

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