systemd/rules.d/60-persistent-v4l.rules

# do not edit this file, it will be overwritten on update

ACTION=="remove", GOTO="persistent_v4l_end"
SUBSYSTEM!="video4linux", GOTO="persistent_v4l_end"
ENV{MAJOR}=="", GOTO="persistent_v4l_end"

IMPORT{program}="v4l_id $devnode"

SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
KERNEL=="video*", ENV{ID_SERIAL}=="?*", SYMLINK+="v4l/by-id/$env{ID_BUS}-$env{ID_SERIAL}-video-index$attr{index}"

# check for valid "index" number
TEST!="index", GOTO="persistent_v4l_end"
ATTR{index}!="?*", GOTO="persistent_v4l_end"

IMPORT{builtin}="path_id"
KERNEL=="video*|vbi*", ENV{ID_PATH}=="?*",                   SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}"
KERNEL=="video*|vbi*", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-video-index$attr{index}"
KERNEL=="audio*",      ENV{ID_PATH}=="?*",                   SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}"
KERNEL=="audio*",      ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-audio-index$attr{index}"

LABEL="persistent_v4l_end"
rules: add v4l persistent links Maybe we will have this working, finally. Thanks to Kees and Brandon. 2008-06-26 23:28:13 +08:00			`# do not edit this file, it will be overwritten on update`

replace "add\|change" with "!remove" 2010-04-12 22:52:41 +08:00			`ACTION=="remove", GOTO="persistent_v4l_end"`
rules: add v4l persistent links Maybe we will have this working, finally. Thanks to Kees and Brandon. 2008-06-26 23:28:13 +08:00			`SUBSYSTEM!="video4linux", GOTO="persistent_v4l_end"`
v4l_id: move from udev-extras 2009-06-17 00:41:05 +08:00			`ENV{MAJOR}=="", GOTO="persistent_v4l_end"`

remove mknod() logic and rely on 'devtmpfs' 2012-01-01 11:21:15 +08:00			`IMPORT{program}="v4l_id $devnode"`
rules: add v4l persistent links Maybe we will have this working, finally. Thanks to Kees and Brandon. 2008-06-26 23:28:13 +08:00
implement path_id, usb_id, input_id as built-in command 2011-08-05 08:00:30 +08:00			`SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"`
rules: v4l - add by-id/ links for USB devices /dev/v4l \|-- by-id \| \|-- usb-046d_09a4_C4B15020-video-index0 -> ../../video0 \| `-- usb-05a9_a511-video-index0 -> ../../video1 `-- by-path \|-- pci-0000:00:1d.0-usb-0:1:1.0-video-index0 -> ../../video1 `-- pci-0000:00:1d.7-usb-0:2:1.0-video-index0 -> ../../video0 2008-11-20 09:26:13 +08:00			`KERNEL=="video", ENV{ID_SERIAL}=="?", SYMLINK+="v4l/by-id/$env{ID_BUS}-$env{ID_SERIAL}-video-index$attr{index}"`

rules: add v4l persistent links Maybe we will have this working, finally. Thanks to Kees and Brandon. 2008-06-26 23:28:13 +08:00			`# check for valid "index" number`
			`TEST!="index", GOTO="persistent_v4l_end"`
			`ATTR{index}!="?*", GOTO="persistent_v4l_end"`

implement path_id, usb_id, input_id as built-in command 2011-08-05 08:00:30 +08:00			`IMPORT{builtin}="path_id"`
udev: add USB revision in ID_PATH xHCI host controller may register two (or more?) USB root hubs for USB 2.0 and USB 3.0, and devices under the hubs may have same ID_PATH. So, to avoid the conflict, let's introduce ID_PATH_WITH_USB_REVISION that includes the USB revision. Closes #19406. 2023-05-02 01:28:35 +08:00			`KERNEL=="video\|vbi", ENV{ID_PATH}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}"`
			`KERNEL=="video\|vbi", ENV{ID_PATH_WITH_USB_REVISION}=="?*", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-video-index$attr{index}"`
			`KERNEL=="audio", ENV{ID_PATH}=="?", SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}"`
			`KERNEL=="audio", ENV{ID_PATH_WITH_USB_REVISION}=="?", SYMLINK+="v4l/by-path/$env{ID_PATH_WITH_USB_REVISION}-audio-index$attr{index}"`
rules: add v4l persistent links Maybe we will have this working, finally. Thanks to Kees and Brandon. 2008-06-26 23:28:13 +08:00
			`LABEL="persistent_v4l_end"`