On Fri, Sep 23, 2005 at 11:06:43AM +0300, Hakan Avci wrote: > Jan,thank u very very very.... much,I eat my head for this problem(we > say in Turkey) :) . > > So I have a question(actually a problem).is lock a file while second > person looking that file?? Am I explain?
There is not really a lock file or lock on the device. However our kernel module only allows a single process to open it. If the device is considered 'in-use' the kernel returns an EBUSY error. It is quite useful, this way the kernel knows that any message to or from userspace always ends up with the same process. Jan
