On 16/10/15 16:56, Robert Millan wrote:
El 15/10/15 a les 03:03, Bruno Félix Rezende Ribeiro ha escrit:
OTOH I think this part of your patch:
+ #define RUMP_SYS_OPEN
+ #define RUMP_SYS_CLOSE
+ #define RUMP_SYS_IOCTL
+ #define RUMP_SYS_READWRITE
is a bit dangerous. It would break any (current or future) usage of
open() / close() / etc in that file which is not related to USB device
nodes.
I see. What do you recommend? #ifdefs for each occurrence? Anyway,
I'm just playing around with it.
I recommend explicit rump_sys_open(), e.g.
int fd = rump_sys_open("/dev/ugenhc", RUMP_O_RDWR);
if (fd == -1)
error(1, rump_errno2host(errno), "rump_sys_open");
The rump kernel ugenhc (= "ugen host controller") driver uses a
/dev/ugen backend to emulate a USB host controller to the USB stack. So
the idea with ugenhc is that you can run the USB drivers in userspace,
e.g. for development purposes, if your host supports /dev/ugen, and
don't need to access the actual PCI devices directly. So you can't open
/dev/ugenhc, and not only because it doesn't exist.
If you don't have a USB stack on your host (which I assume is why we're
having this discussion ;), ugenhc is completely useless.
If you want to do something like rump_sys_open("/dev/ugen"), you
probably need the ugen driver as a rump kernel components (as was
speculated in this thread a few days ago).
