Hello,
our own device (see attachement for udevadm info --attribute-walk)
should have a symlink.
Therefore I create the following udev rule:
SUBSYSTEM=="tty", KERNEL=="ttyACM[0-9]*",
ENV{ID_USB_INTERFACE_NUM}=="02", ATTRS{idVendor}=="1dfb",
ATTRS{idProduct}=="0010", SYMLINK+="2a"
But a "udevadm test /sys/class/tty/ttyACM1" shows, that there is no
match, a symlink is not created. If I remofe the "ENV" pattern, the rule
is working.
Any idea, whats wrong here?
System is opensuse LEAP 15.5, RPM-VErsion of UDEV is 249.16-150400.8.25.7
Best regards
Daniel
--
Daniel Spannbauer Systemadministration
marco Systemanalyse und Entwicklung GmbH Tel +49 8333 9233-27 Fax -11
Rechbergstr. 4-6, D 87727 Babenhausen Mobil +49 171 4033220
https://www.marco.de Email ds@xxxxxxxx
Geschäftsführer Martin Reuter, Torsten Lukas HRB 171775 Amtsgericht München
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/usb1/1-1/1-1:1.2/tty/ttyACM1':
KERNEL=="ttyACM1"
SUBSYSTEM=="tty"
DRIVER==""
ATTR{power/async}=="disabled"
ATTR{power/control}=="auto"
ATTR{power/runtime_active_kids}=="0"
ATTR{power/runtime_active_time}=="0"
ATTR{power/runtime_enabled}=="disabled"
ATTR{power/runtime_status}=="unsupported"
ATTR{power/runtime_suspended_time}=="0"
ATTR{power/runtime_usage}=="0"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.2':
KERNELS=="1-1:1.2"
SUBSYSTEMS=="usb"
DRIVERS=="cdc_acm"
ATTRS{authorized}=="1"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceClass}=="02"
ATTRS{bInterfaceNumber}=="02"
ATTRS{bInterfaceProtocol}=="01"
ATTRS{bInterfaceSubClass}=="02"
ATTRS{bNumEndpoints}=="01"
ATTRS{bmCapabilities}=="6"
ATTRS{iad_bFirstInterface}=="02"
ATTRS{iad_bFunctionClass}=="02"
ATTRS{iad_bFunctionProtocol}=="01"
ATTRS{iad_bFunctionSubClass}=="02"
ATTRS{iad_bInterfaceCount}=="02"
ATTRS{power/async}=="enabled"
ATTRS{power/runtime_active_kids}=="0"
ATTRS{power/runtime_enabled}=="enabled"
ATTRS{power/runtime_status}=="suspended"
ATTRS{power/runtime_usage}=="0"
ATTRS{supports_autosuspend}=="1"
looking at parent device '/devices/pci0000:00/0000:00:14.0/usb1/1-1':
KERNELS=="1-1"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{authorized}=="1"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{bConfigurationValue}=="1"
ATTRS{bDeviceClass}=="ef"
ATTRS{bDeviceProtocol}=="01"
ATTRS{bDeviceSubClass}=="02"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{bMaxPower}=="500mA"
ATTRS{bNumConfigurations}=="1"
ATTRS{bNumInterfaces}==" 5"
ATTRS{bcdDevice}=="0130"
ATTRS{bmAttributes}=="80"
ATTRS{busnum}=="1"
ATTRS{configuration}==""
ATTRS{devnum}=="2"
ATTRS{devpath}=="1"
ATTRS{idProduct}=="0010"
ATTRS{idVendor}=="1dfb"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="marco Systemanalyse und Entwicklung GmbH"
ATTRS{maxchild}=="0"
ATTRS{power/active_duration}=="506752"
ATTRS{power/async}=="enabled"
ATTRS{power/autosuspend}=="2"
ATTRS{power/autosuspend_delay_ms}=="2000"
ATTRS{power/connected_duration}=="506752"
ATTRS{power/control}=="on"
ATTRS{power/level}=="on"
ATTRS{power/persist}=="1"
ATTRS{power/runtime_active_kids}=="0"
ATTRS{power/runtime_active_time}=="506474"
ATTRS{power/runtime_enabled}=="forbidden"
ATTRS{power/runtime_status}=="active"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/runtime_usage}=="1"
ATTRS{product}=="USB-Serial Controller"
ATTRS{quirks}=="0x0"
ATTRS{removable}=="removable"
ATTRS{rx_lanes}=="1"
ATTRS{serial}=="1105484298"
ATTRS{speed}=="12"
ATTRS{tx_lanes}=="1"
ATTRS{urbnum}=="20"
ATTRS{version}==" 2.00"
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}=="0514"
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 5.14.21-150500.53-default xhci-hcd"
ATTRS{maxchild}=="16"
ATTRS{power/active_duration}=="506888"
ATTRS{power/async}=="enabled"
ATTRS{power/autosuspend}=="0"
ATTRS{power/autosuspend_delay_ms}=="0"
ATTRS{power/connected_duration}=="506888"
ATTRS{power/control}=="auto"
ATTRS{power/level}=="auto"
ATTRS{power/runtime_active_kids}=="3"
ATTRS{power/runtime_active_time}=="506885"
ATTRS{power/runtime_enabled}=="enabled"
ATTRS{power/runtime_status}=="active"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/runtime_usage}=="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{rx_lanes}=="1"
ATTRS{serial}=="0000:00:14.0"
ATTRS{speed}=="480"
ATTRS{tx_lanes}=="1"
ATTRS{urbnum}=="68"
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{device}=="0xa36d"
ATTRS{dma_mask_bits}=="64"
ATTRS{driver_override}=="(null)"
ATTRS{enable}=="1"
ATTRS{index}=="4"
ATTRS{irq}=="127"
ATTRS{label}=="Onboard - Other"
ATTRS{local_cpulist}=="0-11"
ATTRS{local_cpus}=="fff"
ATTRS{msi_bus}=="1"
ATTRS{msi_irqs/127}=="msi"
ATTRS{numa_node}=="-1"
ATTRS{power/async}=="enabled"
ATTRS{power/control}=="on"
ATTRS{power/runtime_active_kids}=="1"
ATTRS{power/runtime_active_time}=="508239"
ATTRS{power/runtime_enabled}=="forbidden"
ATTRS{power/runtime_status}=="active"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/runtime_usage}=="1"
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{revision}=="0x10"
ATTRS{subsystem_device}=="0x7270"
ATTRS{subsystem_vendor}=="0x8086"
ATTRS{vendor}=="0x8086"
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""
ATTRS{power/async}=="enabled"
ATTRS{power/control}=="auto"
ATTRS{power/runtime_active_kids}=="14"
ATTRS{power/runtime_active_time}=="0"
ATTRS{power/runtime_enabled}=="disabled"
ATTRS{power/runtime_status}=="unsupported"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/runtime_usage}=="0"
ATTRS{waiting_for_supplier}=="0"
