[Mono-dev] Problems with FileStream.Lock();

[Jonathan Pryor]

On Jan 8, 2013, at 4:44 PM, Terry-Watts.com <Terry at Terry-Watts.com> wrote:
> I have check the Android API docs and file locking has been available on channels since API Level 1.

"on channels"?

Anyway, quick perusal of the source shows that FileStream.Lock() is fcntl(2):

	https://github.com/mono/mono/blob/master/mcs/class/corlib/System.IO/FileStream.cs#L875
	https://github.com/mono/mono/blob/master/mcs/class/corlib/System.IO/MonoIO.cs#L414
	https://github.com/mono/mono/blob/master/mono/metadata/file-io.c#L1191
	https://github.com/mono/mono/blob/master/mono/io-layer/locking.c#L117
	https://github.com/mono/mono/blob/master/mono/io-layer/locking.c#L26

So, why is fcntl(2) failing? I don't know, you're swallowing the exception.

 - Jon