Estou tentando escrever uma regra do udev para alterar o grupo no meu programador USB MSP-FET430UIF. Isto é o que eu tenho até agora (filename /etc/udev/rules.d/40-ti-fet430.rules ):
SUBSYSTEM=="usb", ATTR{idVendor}=="0451", ATTR{idProduct}=="f430", MODE="0660", GROUP="plugdev", RUN+="/tmp/test.sh"
O comando run (que apenas redireciona data para / tmp / test) está funcionando. No entanto, o grupo e as permissões do dispositivo / dev / ttyUSB0 não estão sendo alteradas:
$ ls -l /dev/ttyUSB0
crw------- 1 root root 188, 0 May 18 13:05 /dev/ttyUSB0
Esta é a saída de udevadm test /device/blabla :
$ udevadm test 'udevadm info -q path -n /dev/ttyUSB0 '
calling: test
version 216
This program is for debugging only, it does not run any program
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.
load module index
timestamp of '/etc/systemd/network' changed
timestamp of '/lib/systemd/network' changed
Parsed configuration file /lib64/systemd/network/99-default.link
Created link configuration context.
timestamp of '/etc/udev/rules.d' changed
Reading rules file: /lib64/udev/rules.d/40-gentoo.rules
Reading rules file: /etc/udev/rules.d/40-ti-fet430.rules
Reading rules file: /lib64/udev/rules.d/42-usb-hid-pm.rules
Reading rules file: /lib64/udev/rules.d/50-firmware.rules
Reading rules file: /lib64/udev/rules.d/50-udev-default.rules
Reading rules file: /etc/udev/rules.d/52-digilent-usb.rules
Reading rules file: /lib64/udev/rules.d/56-hpmud.rules
Reading rules file: /lib64/udev/rules.d/60-cdrom_id.rules
Reading rules file: /lib64/udev/rules.d/60-drm.rules
Reading rules file: /lib64/udev/rules.d/60-keyboard.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-alsa.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-input.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-serial.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-storage-tape.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-storage.rules
Reading rules file: /lib64/udev/rules.d/60-persistent-v4l.rules
Reading rules file: /lib64/udev/rules.d/61-accelerometer.rules
Reading rules file: /run/udev/rules.d/61-dev-root-link.rules
Reading rules file: /lib64/udev/rules.d/64-btrfs.rules
Reading rules file: /lib64/udev/rules.d/70-udev-acl.rules
Reading rules file: /lib64/udev/rules.d/75-net-description.rules
Reading rules file: /lib64/udev/rules.d/75-probe_mtd.rules
Reading rules file: /lib64/udev/rules.d/75-tty-description.rules
Reading rules file: /lib64/udev/rules.d/78-sound-card.rules
Reading rules file: /lib64/udev/rules.d/80-drivers.rules
Reading rules file: /lib64/udev/rules.d/80-net-setup-link.rules
Reading rules file: /lib64/udev/rules.d/80-udisks2.rules
Reading rules file: /lib64/udev/rules.d/85-regulatory.rules
Reading rules file: /lib64/udev/rules.d/90-alsa-restore.rules
Reading rules file: /lib64/udev/rules.d/90-network.rules
Reading rules file: /lib64/udev/rules.d/95-udev-late.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-dell.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-fujitsu.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-gateway.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-ibm.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-lenovo.rules
Reading rules file: /lib64/udev/rules.d/95-upower-battery-recall-toshiba.rules
Reading rules file: /lib64/udev/rules.d/95-upower-csr.rules
Reading rules file: /lib64/udev/rules.d/95-upower-hid.rules
Reading rules file: /lib64/udev/rules.d/95-upower-wup.rules
Reading rules file: /lib64/udev/rules.d/97-hid2hci.rules
rules contain 49152 bytes tokens (4096 * 12 bytes), 12512 bytes strings
2501 strings (28205 bytes), 1749 de-duplicated (16446 bytes), 753 trie nodes used
IMPORT builtin 'path_id' /lib64/udev/rules.d/60-persistent-serial.rules:9
LINK 'serial/by-path/pci-0000:00:13.0-usb-0:2:2.0-port0' /lib64/udev/rules.d/60-persistent-serial.rules:11
IMPORT builtin 'usb_id' /lib64/udev/rules.d/60-persistent-serial.rules:13
/sys/devices/pci0000:00/0000:00:13.0/usb2/2-2/2-2:2.0: if_class 255 protocol 0
LINK 'serial/by-id/usb-Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89-if00-port0' /lib64/udev/rules.d/60-persistent-serial.rules:18
IMPORT builtin skip 'usb_id' /lib64/udev/rules.d/75-tty-description.rules:6
IMPORT builtin 'hwdb' /lib64/udev/rules.d/75-tty-description.rules:6
handling device node '/dev/ttyUSB0', devnum=c188:0, mode=0600, uid=0, gid=0
preserve permissions /dev/ttyUSB0, 020600, uid=0, gid=0
preserve already existing symlink '/dev/char/188:0' to '../ttyUSB0'
found 'c188:0' claiming '/run/udev/links//serial/by-id/usb-Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89-if00-port0'
creating link '/dev/serial/by-id/usb-Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89-if00-port0' to '/dev/ttyUSB0'
preserve already existing symlink '/dev/serial/by-id/usb-Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89-if00-port0' to '../../ttyUSB0'
found 'c188:0' claiming '/run/udev/links//serial/by-path/pci-0000:00:13.0-usb-0:2:2.0-port0'
creating link '/dev/serial/by-path/pci-0000:00:13.0-usb-0:2:2.0-port0' to '/dev/ttyUSB0'
preserve already existing symlink '/dev/serial/by-path/pci-0000:00:13.0-usb-0:2:2.0-port0' to '../../ttyUSB0'
unable to create temporary db file '/run/udev/data/c188:0.tmp': Permission denied
.ID_PORT=0
ACTION=add
DEVLINKS=/dev/serial/by-id/usb-Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89-if00-port0 /dev/serial/by-path/pci-0000:00:13.0-usb-0:2:2.0-port0
DEVNAME=/dev/ttyUSB0
DEVPATH=/devices/pci0000:00/0000:00:13.0/usb2/2-2/2-2:2.0/ttyUSB0/tty/ttyUSB0
ID_BUS=usb
ID_MODEL=MSP-FET430UIF_JTAG_Tool
ID_MODEL_ENC=MSP-FET430UIF JTAG Tool
ID_MODEL_FROM_DATABASE=MSP-FET430UIF JTAG Tool
ID_MODEL_ID=f430
ID_PATH=pci-0000:00:13.0-usb-0:2:2.0
ID_PATH_TAG=pci-0000_00_13_0-usb-0_2_2_0
ID_REVISION=0101
ID_SERIAL=Texas_Instruments_MSP-FET430UIF_JTAG_Tool_TUSB3410172ECD5EF754FF89
ID_SERIAL_SHORT=TUSB3410172ECD5EF754FF89
ID_TYPE=generic
ID_USB_CLASS_FROM_DATABASE=Vendor Specific Class
ID_USB_DRIVER=ti_usb_3410_5052
ID_USB_INTERFACES=:ff0000:
ID_USB_INTERFACE_NUM=00
ID_VENDOR=Texas_Instruments
ID_VENDOR_ENC=Texas Instruments
ID_VENDOR_FROM_DATABASE=Texas Instruments, Inc.
ID_VENDOR_ID=0451
MAJOR=188
MINOR=0
SUBSYSTEM=tty
USEC_INITIALIZED=33057949
unload module index
Unloaded link configuration context.
(Eu tenho que confessar que não tenho certeza do que eu deveria estar vendo na saída udevadm test ).
Em resumo, por que o grupo não está sendo alterado?
P.S. Havia uma regra definindo o grupo para uucp, mas eu comentei essa regra por simplicidade. Estava no arquivo /lib64/udev/rules.d/50-udev-default.rules , então, se eu entendi, minha regra provavelmente teria precedência.
Saída de udevadm info -a /dev/ttyUSB0 :
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/pci0000:00/0000:00:13.0/usb2/2-2/2-2:2.0/ttyUSB0/tty/ttyUSB0':
KERNEL=="ttyUSB0"
SUBSYSTEM=="tty"
DRIVER==""
looking at parent device '/devices/pci0000:00/0000:00:13.0/usb2/2-2/2-2:2.0/ttyUSB0':
KERNELS=="ttyUSB0"
SUBSYSTEMS=="usb-serial"
DRIVERS=="ti_usb_3410_5052_1"
ATTRS{port_number}=="0"
looking at parent device '/devices/pci0000:00/0000:00:13.0/usb2/2-2/2-2:2.0':
KERNELS=="2-2:2.0"
SUBSYSTEMS=="usb"
DRIVERS=="ti_usb_3410_5052"
ATTRS{bInterfaceClass}=="ff"
ATTRS{bInterfaceSubClass}=="00"
ATTRS{bInterfaceProtocol}=="00"
ATTRS{bNumEndpoints}=="03"
ATTRS{supports_autosuspend}=="1"
ATTRS{bAlternateSetting}==" 0"
ATTRS{bInterfaceNumber}=="00"
looking at parent device '/devices/pci0000:00/0000:00:13.0/usb2/2-2':
KERNELS=="2-2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{devpath}=="2"
ATTRS{idVendor}=="0451"
ATTRS{speed}=="12"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="2"
ATTRS{bMaxPacketSize0}=="8"
ATTRS{busnum}=="2"
ATTRS{devnum}=="3"
ATTRS{configuration}==""
ATTRS{bMaxPower}=="100mA"
ATTRS{authorized}=="1"
ATTRS{bmAttributes}=="a0"
ATTRS{bNumConfigurations}=="2"
ATTRS{maxchild}=="0"
ATTRS{bcdDevice}=="0101"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="TUSB3410172ECD5EF754FF89"
ATTRS{version}==" 1.10"
ATTRS{urbnum}=="13"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Texas Instruments"
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="f430"
ATTRS{bDeviceClass}=="ff"
ATTRS{product}=="MSP-FET430UIF JTAG Tool"
looking at parent device '/devices/pci0000:00/0000:00:13.0/usb2':
KERNELS=="usb2"
SUBSYSTEMS=="usb"
DRIVERS=="usb"
ATTRS{bDeviceSubClass}=="00"
ATTRS{bDeviceProtocol}=="00"
ATTRS{devpath}=="0"
ATTRS{idVendor}=="1d6b"
ATTRS{speed}=="12"
ATTRS{bNumInterfaces}==" 1"
ATTRS{bConfigurationValue}=="1"
ATTRS{bMaxPacketSize0}=="64"
ATTRS{authorized_default}=="1"
ATTRS{busnum}=="2"
ATTRS{devnum}=="1"
ATTRS{configuration}==""
ATTRS{bMaxPower}=="0mA"
ATTRS{authorized}=="1"
ATTRS{bmAttributes}=="e0"
ATTRS{bNumConfigurations}=="1"
ATTRS{maxchild}=="2"
ATTRS{bcdDevice}=="0318"
ATTRS{avoid_reset_quirk}=="0"
ATTRS{quirks}=="0x0"
ATTRS{serial}=="0000:00:13.0"
ATTRS{version}==" 1.10"
ATTRS{urbnum}=="49"
ATTRS{ltm_capable}=="no"
ATTRS{manufacturer}=="Linux 3.18.12-gentoo ohci_hcd"
ATTRS{removable}=="unknown"
ATTRS{idProduct}=="0001"
ATTRS{bDeviceClass}=="09"
ATTRS{product}=="OHCI PCI host controller"
looking at parent device '/devices/pci0000:00/0000:00:13.0':
KERNELS=="0000:00:13.0"
SUBSYSTEMS=="pci"
DRIVERS=="ohci-pci"
ATTRS{irq}=="16"
ATTRS{subsystem_vendor}=="0x1028"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x0c0310"
ATTRS{driver_override}=="(null)"
ATTRS{consistent_dma_mask_bits}=="32"
ATTRS{dma_mask_bits}=="32"
ATTRS{local_cpus}=="ffffffff"
ATTRS{device}=="0x4387"
ATTRS{enable}=="1"
ATTRS{msi_bus}=="1"
ATTRS{local_cpulist}=="0-31"
ATTRS{vendor}=="0x1002"
ATTRS{subsystem_device}=="0x01fc"
looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""