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| author | Lennart Poettering <lennart@poettering.net> | 2009-05-12 21:49:18 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2009-05-12 21:49:18 +0200 |
| commit | a65f01de17aec844db5ba270371a743071d5f58b (patch) | |
| tree | 32aeb5845911bad70dd98bcd11010ba1a4a76805 | |
| parent | faecab7cbf6d1fb06dd39d4fd436d930cc3f3522 (diff) | |
alsa: add persistant device rules
This patch adds persistant device node symlinks for ALSA control
devices. This mimics the behaviour of the persistancy rules for other
subsystems, such as v4l or storage.
This patch is useful only when alsa-lib with this patch is used:
http://git.alsa-project.org/?p=alsa-lib.git;a=commit;h=33ab0b5381c87e151e87e5000964edd868484886
This will allow referring to ALSA devices with device strings such as:
hw:/dev/snd/by-path/pci-0000:00:1a.1-usb-0:1:1.0
instead of
hw:0
where the device index might be unstable.
| -rw-r--r-- | rules.d/60-persistent-alsa.rules | 15 | ||||
| -rw-r--r-- | rules.d/Makefile.am | 3 |
2 files changed, 17 insertions, 1 deletions
diff --git a/rules.d/60-persistent-alsa.rules b/rules.d/60-persistent-alsa.rules new file mode 100644 index 0000000..4f3cf6a --- /dev/null +++ b/rules.d/60-persistent-alsa.rules @@ -0,0 +1,15 @@ +# do not edit this file, it will be overwritten on update + +ACTION!="add|change", GOTO="persistent_alsa_end" +SUBSYSTEM!="sound", GOTO="persistent_alsa_end" +KERNEL!="controlC[0-9]*", GOTO="persistent_alsa_end" + +SUBSYSTEMS=="usb", ENV{ID_MODEL}=="", IMPORT{program}="usb_id --export %p" +SUBSYSTEMS=="usb", ENV{ID_IFACE}="$attr{bInterfaceNumber}" +ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="?*", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_IFACE}" +ENV{ID_SERIAL}=="?*", ENV{ID_IFACE}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}" + +IMPORT{program}="path_id %p" +ENV{ID_PATH}=="?*", SYMLINK+="snd/by-path/$env{ID_PATH}" + +LABEL="persistent_alsa_end" diff --git a/rules.d/Makefile.am b/rules.d/Makefile.am index a6ee93f..65800ef 100644 --- a/rules.d/Makefile.am +++ b/rules.d/Makefile.am @@ -3,4 +3,5 @@ include $(top_srcdir)/Makefile.am.inc udevrulesdir = $(udev_prefix)/lib/udev/rules.d dist_udevrules_DATA = \ - 78-sound-card.rules + 78-sound-card.rules \ + 60-persistent-alsa.rules |