udev

I'm on Ubuntu 12.04.5 LTS, x86_64. I've a usb device that uses libusb to communicate with the computer. Once I plug it into the computer and run the communication program I get the following error: libusb couldn't open USB device /dev/bus/usb/008/004: Permission denied. libusb requires write access to USB device nodes. libusb failed to find the Optotrak USB device. Are you sure you have set the udev permissions correctly? So if I chmod the /dev/bus/usb/008/004 as follows: sudo chmod 777 /dev/bus/usb/008/004 and run the communication program again, then the device works perfectly. The problem

EDIT: This occurs when I am trying to use a separate partition with ANY mount point, not just /var . I am using Buildroot to build an embedded linux system. I am trying to use a separate partition for /var, but this occurs for ANY mount point. My init system is systemd, udev for device management. I've edited my fstab to: # <file system> <mount pt> <type> <options> <dump> <pass> /dev/root / ext2 rw,noauto 0 1 /dev/mmcblk0p4 /var ext2 defaults 0 2 proc /proc proc defaults 0 0 devpts /dev/pts devpts defaults,gid=5,mode=620 0 0 tmpfs /dev/shm tmpfs mode=0777 0 0 tmpfs /tmp tmpfs defaults 0 0

I need complex and universal udev rule to determine USB-device plugged in certain port of the any USB hub. so, i have to combine parent attributes of different layers of the device tree... I have this: $udevadm info --query=all --name=/dev/ttyUSB0 --attribute-walk looking at device '/devices/platform/bcm2708_usb/usb1/1-1/1-1.2/1-1.2.4/1-1.2.4:1.0/ttyUSB0/tty/ttyUSB0': KERNEL=="ttyUSB0" SUBSYSTEM=="tty" DRIVER=="" . . . looking at parent device '/devices/platform/bcm2708_usb/usb1/1-1/1-1.2/1-1.2.4': KERNELS=="1-1.2.4" SUBSYSTEMS=="usb" DRIVERS=="usb" ... looking at parent device '/devices

I have two LCD's using Xorg's xinerama feature. Each LCD screen has a touchscreen which are connected to their respective USB lines. Looking into the '/var/log/messages' file, I see the following: kernel: input: Analog Resistive as /class/input/input0 kernel: input: USB HID v1.01 Mouse [Analog Resistive] on usb-0000:00:1d.3-1 kernel: input: Analog Resistive as /class/input/input1 kernel: input: USB HID v1.01 Mouse [Analog Resistive] on usb-0000:00:1d.3-2 For some reason, at some point in time the USB bus seems to reset (or something weird) and my two touchscreens get inverted (press the left

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I am trying to run a script from a udev rule after any USB drive has been plugged in. When I run the script manually, after the USB is mounted normally, it will run fine. The script calls a python program to run and the python program uses a file on the USB drive. No issues there. If I make the script to simply log the date in a file, that works just fine. So I know my UDEV rule and my script work fine, each on their own. The issue seems to come up when udev calls the script, then script calling the python program and the python

ubuntu下运行adb devices, 出现如下显示 List of devices attached ???????????? no permissions 解决方法： 1. 运行lsusb 记住新加入的vid:pid 2. sudo vi/etc/udev/rules.d/51-android.rules，加入一行 SUBSYSTEM=="usb", ATTR{idVendor}=="vid", ATTR{idProduct}=="pid", MODE="0666" 保存 sudo chmod a+rx/etc/udev/rules.d/51-android.rules 3. 重启udev sudo /etc/init.d/udev restart 或者 sudo restartudev 4. 重启adb server adb kill-server adb start-server 再次运行adb devices, 此时OK 更新：类似的error有 user in plugdev group; are your udev rules wrong? 也同样方法可以解决 3&4可以 不需要，直接拔下再插上USB线就可以了 来源： CSDN 作者： kv110 链接： https://blog.csdn.net/kv110/article/details/48272159

I am trying to get a script to run whenever ANY USB flash drive (not just a specific one) is plugged in to the system and I have been pulling my hair out for about 2 weeks now on and off trying to figure it out. Can anybody help me? (running Ubuntu if that helps). I need to be able to pass the drive serial number and the devpath (/dev/sd**) at bear minimum. SpliFF First you need your rule to detect usb storage devices /etc/udev/rules.d/10-usbmount.rules: KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb", RUN+="/usr/bin/usbdevinserted" This runs our custom executable shell script

udev是一种工具，它能够根据系统中的硬件设备的状态动态更新设备文件，包括设备文件的创建，删除等，设备文件通常放在/dev目录下。使用udev后，在/dev目录下就只包含系统中真正存在的设备。udev同时提供了监视接口，当设备的状态改变时，监视接口可以向应用程序报告发生的事件，当设备加入系统或从系统移除时都可以接到通知。 udev只支持linux-2.6及以上版本的内核，因为udev严重依赖于sysfs文件系统提供的信息，而sysfs文件系统只在linux-2.6内核中才有。 udev能够实现所有devfs实现的功能。但udev运行在用户模式中，而devfs运行在内核模式中。 作用： 1. 动态创建或删除设备文件 2. 遍历sysfs设备文件 3. hotplug（利用netlink） 使用udev需要先安装libudev库，在程序中包含libudev.h头文件，并且在编译时加上-ludev告诉编译器去链接udev库。 1. 安装libudev sudo apt-get install libudev-dev 2. 编写测试代码udev-hotplugin.c #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <signal.h> #include <sys

环境 RHEL6|RHEL7，LVM2，RAW device 用途 使用LVM的lv逻辑卷绑定裸设备 1. 编辑 /etc/udev/rules.d/60-raw.rules 添加如下： ACTION!="add|change", GOTO="raw_end" # Create raw character device mapping: ENV{DM_VG_NAME}=="vgoradata", ENV{DM_LV_NAME}=="lv_5G_1", RUN+="/bin/raw /dev/raw/raw1 %N" ENV{DM_VG_NAME}=="vgoradata", ENV{DM_LV_NAME}=="lv_5G_2", RUN+="/bin/raw /dev/raw/raw2 %N" ENV{DM_VG_NAME}=="vgoradata", ENV{DM_LV_NAME}=="lv_5G_3", RUN+="/bin/raw /dev/raw/raw3 %N" # To set permissions: KERNEL=="raw*", OWNER:="grid", GROUP:="asmadmin", MODE:="0660" LABEL="raw_end 2.使规则生效 udevadm control --reload-rules udevadm trigger -