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udevadm [2018/04/09 02:02] beandog created |
udevadm [2018/04/09 02:07] (current) beandog |
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====== udevadm ====== | ====== udevadm ====== | ||
+ | |||
+ | * [[udev]] | ||
You can use udevadm to see the variables set by udev for a device. This is helpful if you want to get information about the device, based on whether it has a DVD or a CD in there, for example. | You can use udevadm to see the variables set by udev for a device. This is helpful if you want to get information about the device, based on whether it has a DVD or a CD in there, for example. | ||
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<code> | <code> | ||
udevadm info /dev/sr0 | udevadm info /dev/sr0 | ||
+ | </code> | ||
+ | |||
+ | If you want to change any rules, such as in ''/lib/udev/rules.d'' or ''/etc/udev/rules.d'', you can reload them with udevadm as well: | ||
+ | |||
+ | <code> | ||
+ | udevadm trigger | ||
+ | </code> | ||
+ | |||
+ | That's what I use when doing my onevent trayclose calls. | ||
+ | |||
+ | In ''/etc/udev/rules.d/70-persistent-cd.rules'' I generate a symlink to ''/dev/dvd'' and ''/dev/bluray'', as well as call ''onevent.trayclose'' when there is a DVD detected in the drive on an event change (tray closed from being open). | ||
+ | |||
+ | <code> | ||
+ | # Sony Blu-ray | ||
+ | SUBSYSTEM=="block", ENV{ID_MODEL}=="ATAPI_iHOS104", ENV{ID_REVISION}=="WL0D", SYMLINK+="bluray", ENV{GENERATED}="1" | ||
+ | SUBSYSTEM=="block", ENV{ID_MODEL}=="ATAPI_iHOS104", ENV{ID_REVISION}=="WL0D", SYMLINK+="dvd", ENV{GENERATED}="1" | ||
+ | SUBSYSTEM=="block", ENV{ID_MODEL}=="ATAPI_iHOS104", ENV{ID_CDROM_MEDIA_DVD}=="1", ENV{ID_CDROM_MEDIA_STATE}=="complete", RUN+="/usr/local/bin/onevent.trayclose" | ||
+ | </code> | ||
+ | |||
+ | For completion's sake, here's ''onevent.trayclose'': | ||
+ | |||
+ | <code> | ||
+ | #!/bin/bash | ||
+ | mount -o ro -t udf $DEVNAME &> /dev/null | ||
+ | if [[ -z "$ID_FS_LABEL" ]]; then ID_FS_LABEL=$(busybox volname $DEVNAME); fi | ||
+ | echo "/usr/bin/sudo -u steve /home/steve/Videos/Rip-o-Matic/spincycle $DEVNAME $ID_FS_LABEL" | at now | ||
</code> | </code> |