https://yafengabc.github.io/tags/udev/index.html Hugo zh-cn Sat, 19 Sep 2026 16:30:07 +0800 https://yafengabc.github.io/cnblogs/p8873397/index.html Wed, 18 Apr 2018 11:52:00 +0800 https://yafengabc.github.io/cnblogs/p8873397/index.html Raspbian上的Rpi.GPIO库是可以在普通用户下控制树莓派的GPIO的，然而在ArchlinuxARM下，却需要root用户才行，这无疑会引起安全问题，好在RPi.GPIO提供了一个获取权限的脚本：create_gpio_user_permissions.py 然而这个脚本是没法在ArchlinuxARM上直接运行的，因为Archlinux缺少adduser命令。 这个脚本是这样的： import grp import subprocess def ensure_gpiogroup(): try: grp.getgrnam('gpio') except KeyError: print('GPIO group does not exist - creating...') subprocess.call(['groupadd', '-f', '-r', 'gpio']) subprocess.call(['adduser', 'pi', 'gpio']) # in future, also for groups: # spi # i2c add_udev_rules() def add_udev_rules(): with open('/etc/udev/rules.d/99-gpio.rules','w') as f: f.write("""SUBSYSTEM=="bcm2835-gpiomem", KERNEL=="gpiomem", GROUP="gpio", MODE="0660" SUBSYSTEM=="gpio", KERNEL=="gpiochip*", ACTION=="add", PROGRAM="/bin/sh -c 'chown root:gpio /sys/class/gpio/export /sys/class/gpio/unexport ; chmod 220 /sys/class/gpio/export /sys/class/gpio/unexport'" SUBSYSTEM=="gpio", KERNEL=="gpio*", ACTION=="add", PROGRAM="/bin/sh -c 'chown root:gpio /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value ; chmod 660 /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value'" """) if __name__ == '__main__': ensure_gpiogroup() 反正很简单，手动搞进去就行了