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#1 2024-08-01 12:29:52

mustafa_nasser
Member
Registered: 2023-01-19
Posts: 25

[SOLVED] Understand udev rules

SUBSYSTEM=="usb", ATTRS{configuration}=="HID Keyboard", RUN+="/usr/local/bin/set_keyboard_layout.sh"
SUBSYSTEM=="input", ACTION=="add|bind", ENV{ID_INPUT_KEYBOARD}=="1", RUN+="/usr/local/bin/set_keyboard_layout.sh"

both of them trigger the script but the first one the script works fine, the second one the script is triggered but doesn't work

Last edited by mustafa_nasser (2024-08-01 15:29:53)

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#2 2024-08-01 12:48:20

Trilby
Inspector Parrot
Registered: 2011-11-29
Posts: 30,127
Website

Re: [SOLVED] Understand udev rules

And what's in the script?

"UNIX is simple and coherent" - Dennis Ritchie; "GNU's Not Unix" - Richard Stallman

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#3 2024-08-01 13:00:05

mustafa_nasser
Member
Registered: 2023-01-19
Posts: 25

Re: [SOLVED] Understand udev rules

#!/bin/bash
export DISPLAY=:0
export XAUTHORITY=/run/user/1000/lyxauth
/usr/bin/logger "udev helper shell script to setxkmap on every keyboard connection"
/usr/bin/env DISPLAY=:0 /usr/bin/setxkbmap -layout us,ara -variant ,digits -option grp:alt_shift_toggle

EDIT : sorry for the redundant env variable

Last edited by mustafa_nasser (2024-08-01 13:07:18)

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#4 2024-08-01 13:25:18

mustafa_nasser
Member
Registered: 2023-01-19
Posts: 25

Re: [SOLVED] Understand udev rules

[root@cybermachine mustafa]# udevadm info --attribute-walk --name=/dev/input/event6

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:04B3:3025.0022/inp>
    KERNEL=="event6"
    SUBSYSTEM=="input"
    DRIVER==""
    ATTR{power/control}=="auto"
    ATTR{power/runtime_active_time}=="0"
    ATTR{power/runtime_status}=="unsupported"
    ATTR{power/runtime_suspended_time}=="0"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:04B3:3025.0>
    KERNELS=="input58"
    SUBSYSTEMS=="input"
    DRIVERS==""
    ATTRS{capabilities/abs}=="0"
    ATTRS{capabilities/ev}=="120013"
    ATTRS{capabilities/ff}=="0"
    ATTRS{capabilities/key}=="1000000000007 ff9f207ac14057ff febeffdfffefffff fffffffffffffffe"
    ATTRS{capabilities/led}=="7"
    ATTRS{capabilities/msc}=="10"
    ATTRS{capabilities/rel}=="0"
    ATTRS{capabilities/snd}=="0"
    ATTRS{capabilities/sw}=="0"
    ATTRS{id/bustype}=="0003"
    ATTRS{id/product}=="3025"
    ATTRS{id/vendor}=="04b3"
    ATTRS{id/version}=="0110"
    ATTRS{inhibited}=="0"
    ATTRS{name}=="LITE-ON Technology USB NetVista Full Width Keyboard."
    ATTRS{phys}=="usb-0000:00:14.0-2/input0"
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_time}=="0"
    ATTRS{power/runtime_status}=="unsupported"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{properties}=="0"
    ATTRS{uniq}==""

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/0003:04B3:3025.0>
    KERNELS=="0003:04B3:3025.0022"
    SUBSYSTEMS=="hid"
    DRIVERS=="hid-generic"
    ATTRS{country}=="00"
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_time}=="0"
    ATTRS{power/runtime_status}=="unsupported"
    ATTRS{power/runtime_suspended_time}=="0"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0':
    KERNELS=="1-2:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="usbhid"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="03"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="01"
    ATTRS{bInterfaceSubClass}=="01"
    ATTRS{bNumEndpoints}=="01"
    ATTRS{interface}=="EP1 Interrupt"
    ATTRS{physical_location/dock}=="no"
    ATTRS{physical_location/horizontal_position}=="left"
    ATTRS{physical_location/lid}=="no"
    ATTRS{physical_location/panel}=="top"
    ATTRS{physical_location/vertical_position}=="upper"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-2':
    KERNELS=="1-2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="8"
    ATTRS{bMaxPower}=="70mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0109"
    ATTRS{bmAttributes}=="a0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}=="HID Keyboard"
    ATTRS{devnum}=="36"
    ATTRS{devpath}=="2"
    ATTRS{idProduct}=="3025"
    ATTRS{idVendor}=="04b3"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="LITE-ON Technology"
    ATTRS{maxchild}=="0"
    ATTRS{physical_location/dock}=="no"
    ATTRS{physical_location/horizontal_position}=="left"
    ATTRS{physical_location/lid}=="no"
    ATTRS{physical_location/panel}=="top"
    ATTRS{physical_location/vertical_position}=="upper"
    ATTRS{power/active_duration}=="4591157"
    ATTRS{power/autosuspend}=="2"
    ATTRS{power/autosuspend_delay_ms}=="2000"
    ATTRS{power/connected_duration}=="4591157"
    ATTRS{power/control}=="on"
    ATTRS{power/level}=="on"
    ATTRS{power/persist}=="1"
    ATTRS{power/runtime_active_time}=="4590892"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/wakeup}=="enabled"
    ATTRS{power/wakeup_abort_count}=="0"
    ATTRS{power/wakeup_active}=="0"
    ATTRS{power/wakeup_active_count}=="0"
    ATTRS{power/wakeup_count}=="0"
    ATTRS{power/wakeup_expire_count}=="0"
    ATTRS{power/wakeup_last_time_ms}=="0"
    ATTRS{power/wakeup_max_time_ms}=="0"
    ATTRS{power/wakeup_total_time_ms}=="0"
    ATTRS{product}=="USB NetVista Full Width Keyboard."
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="removable"
    ATTRS{remove}=="(not readable)"
    ATTRS{rx_lanes}=="1"
    ATTRS{speed}=="1.5"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="1403"
    ATTRS{version}==" 1.10"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1':
    KERNELS=="usb1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{authorized_default}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceProtocol}=="01"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{bMaxPower}=="0mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bcdDevice}=="0610"
    ATTRS{bmAttributes}=="e0"
    ATTRS{busnum}=="1"
    ATTRS{configuration}==""
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{idProduct}=="0002"
    ATTRS{idVendor}=="1d6b"
    ATTRS{interface_authorized_default}=="1"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="Linux 6.10.2-arch1-1 xhci-hcd"
    ATTRS{maxchild}=="16"
    ATTRS{power/active_duration}=="11352954"
    ATTRS{power/autosuspend}=="0"
    ATTRS{power/autosuspend_delay_ms}=="0"
    ATTRS{power/connected_duration}=="11352954"
    ATTRS{power/control}=="auto"
    ATTRS{power/level}=="auto"
    ATTRS{power/runtime_active_time}=="11352951"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/wakeup}=="disabled"
    ATTRS{power/wakeup_abort_count}==""
    ATTRS{power/wakeup_active}==""
    ATTRS{power/wakeup_active_count}==""
    ATTRS{power/wakeup_count}==""
    ATTRS{power/wakeup_expire_count}==""
    ATTRS{power/wakeup_last_time_ms}==""
    ATTRS{power/wakeup_max_time_ms}==""
    ATTRS{power/wakeup_total_time_ms}==""
    ATTRS{product}=="xHCI Host Controller"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{remove}=="(not readable)"
    ATTRS{rx_lanes}=="1"
    ATTRS{serial}=="0000:00:14.0"
    ATTRS{speed}=="480"
    ATTRS{tx_lanes}=="1"
    ATTRS{urbnum}=="778"
    ATTRS{version}==" 2.00"

  looking at parent device '/devices/pci0000:00/0000:00:14.0':
    KERNELS=="0000:00:14.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="xhci_hcd"
    ATTRS{ari_enabled}=="0"
    ATTRS{broken_parity_status}=="0"
    ATTRS{class}=="0x0c0330"
    ATTRS{consistent_dma_mask_bits}=="64"
    ATTRS{d3cold_allowed}=="1"
    ATTRS{dbc}=="disabled"
    ATTRS{dbc_bInterfaceProtocol}=="01"
    ATTRS{dbc_bcdDevice}=="0010"
    ATTRS{dbc_idProduct}=="0010"
    ATTRS{dbc_idVendor}=="1d6b"
    ATTRS{device}=="0x06ed"
    ATTRS{dma_mask_bits}=="64"
    ATTRS{driver_override}=="(null)"
    ATTRS{enable}=="1"
    ATTRS{irq}=="126"
    ATTRS{local_cpulist}=="0-11"
    ATTRS{local_cpus}=="fff"
    ATTRS{msi_bus}=="1"
    ATTRS{msi_irqs/126}=="msi"
    ATTRS{msi_irqs/127}=="msi"
    ATTRS{msi_irqs/128}=="msi"
    ATTRS{msi_irqs/129}=="msi"
    ATTRS{msi_irqs/130}=="msi"
    ATTRS{msi_irqs/131}=="msi"
    ATTRS{msi_irqs/132}=="msi"
    ATTRS{msi_irqs/133}=="msi"
    ATTRS{numa_node}=="-1"
    ATTRS{power/control}=="on"
    ATTRS{power/runtime_active_time}=="11353777"
    ATTRS{power/runtime_status}=="active"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{power/wakeup}=="enabled"
    ATTRS{power/wakeup_abort_count}=="0"
    ATTRS{power/wakeup_active}=="0"
    ATTRS{power/wakeup_active_count}=="0"
    ATTRS{power/wakeup_count}=="0"
    ATTRS{power/wakeup_expire_count}=="0"
    ATTRS{power/wakeup_last_time_ms}=="0"
    ATTRS{power/wakeup_max_time_ms}=="0"
    ATTRS{power/wakeup_total_time_ms}=="0"
    ATTRS{power_state}=="D0"
    ATTRS{remove}=="(not readable)"
    ATTRS{rescan}=="(not readable)"
    ATTRS{revision}=="0x00"
    ATTRS{subsystem_device}=="0x87ae"
    ATTRS{subsystem_vendor}=="0x103c"
    ATTRS{vendor}=="0x8086"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""
    ATTRS{power/control}=="auto"
    ATTRS{power/runtime_active_time}=="0"
    ATTRS{power/runtime_status}=="unsupported"
    ATTRS{power/runtime_suspended_time}=="0"
    ATTRS{waiting_for_supplier}=="0"

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#5 2024-08-01 15:10:50

seth
Member
Registered: 2012-09-03
Posts: 56,256

Re: [SOLVED] Understand udev rules

The rule might fire too early or too late, in either case abandon this approach
https://wiki.archlinux.org/title/Xorg/K … tion_files - you can add 

MatchProduct "<product as seen in xinput list>"

to isolate a specific keyboard.

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

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#6 2024-08-01 15:29:31

mustafa_nasser
Member
Registered: 2023-01-19
Posts: 25

Re: [SOLVED] Understand udev rules

Thanks seth ! will be marked as solved

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