文件操作 - 60-persistent-v4l.rules
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文件: /snap/core22/2411/usr/lib/udev/rules.d/60-persistent-v4l.rules
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# 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" ENV{ID_PATH}=="?*", KERNEL=="video*|vbi*", SYMLINK+="v4l/by-path/$env{ID_PATH}-video-index$attr{index}" ENV{ID_PATH}=="?*", KERNEL=="audio*", SYMLINK+="v4l/by-path/$env{ID_PATH}-audio-index$attr{index}" LABEL="persistent_v4l_end"
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