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| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-06-28 18:09:43 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-06-28 18:09:43 +0200 |
| commit | 4275c49e72544d5b92512e41ddecbd6af5bee6c3 (patch) | |
| tree | 22d66cc1e3286e69f50cc676e3c8e7fbd4b0636a /rc/bin/nusbrc | |
| parent | d8c75e45de9483881f782be0b5e7113e625db571 (diff) | |
| download | plan9front-4275c49e72544d5b92512e41ddecbd6af5bee6c3.tar.xz | |
nusb: implement aijus stable uniqueue device names
instead of naming devices by ther dynamically assigned device address,
we hash device uniqueue fields from the device descriptor and produce
a 5 digit hex string that will identify the device across machines.
when there is a collision (less than 1% chance with 100 devices),
usbd will append the device address to the name to make it uniqueue
for this machine.
the hname is passed to drivers in the devid argument, which now has
the form addr:hname, where the colon and hname can be omited (for backwards
compatibility).
when the new behaviour isnt desired, nousbhname= environment variable
can be defined giving the old behaviour.
Diffstat (limited to 'rc/bin/nusbrc')
| -rwxr-xr-x | rc/bin/nusbrc | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/rc/bin/nusbrc b/rc/bin/nusbrc index 546803a4b..1bff5073b 100755 --- a/rc/bin/nusbrc +++ b/rc/bin/nusbrc @@ -7,22 +7,25 @@ if(! bind -a '#u' /dev) @{ rfork ne fn attach { + id=$1 + if(~ $#* 5 && ! test -e /env/nousbhname) + id=$1:$5 switch($4){ case *01 - nusb/audio $1 + nusb/audio $id case *02 # serial and ethernet - nusb/serial $1 + nusb/serial $id # handled /sys/src/9/boot/nusbrc - # nusb/ether $1 + # nusb/ether $id case *03 # handled /sys/src/9/boot/nusbrc - # nusb/kb $1 + # nusb/kb $id case *08 # handled /sys/src/9/boot/nusbrc - # nusb/disk $1 - case *10106 - nusb/ptp $1 + # nusb/disk $id + case 010106 + nusb/ptp $id } } fn detach { |