On Mon, 30 Oct 2006, Hughes, James wrote: > > Depending on your situation, you might want to set up > > g_file_storage so that it pretends to have removable media. > > Every so often your user program could "remove the media" > > (this can be done using sysfs), update the contents of the > > backing file, and then "insert the media". If somebody had > > attached a laptop and was reading the data at the time, then > > the "remove the media" step would fail and your program would > > know not to update the contents at that moment. > > This sounds like a good direction to take, although I am not familiar > with how to use sysfs to 'remove the media' - pointers in this direction > much appreciated.
There is some explanation in the rather long comment at the start of the file_storage.c source file. Basically you have to find the gadget's directory, which is probably under /sys/devices/platform, and look in the *_lun0 subdirectory. There you should see a file named "file". Writing a blank line to it corresponds to ejecting the media, and writing the name of a backing file corresponds to inserting that file as the medium. For this to work you must specify "removable=y" when you install g_file_storage. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
