3
這個問題不是讀取lua文件,而是讀取lua中只讀非可執行文件。Lua讀取只讀文件
我有以下文件
10 awesome % ls -l /sys/class/backlight/intel_backlight/actual_brightness
-r--r--r-- 1 root root 4096 Dec 28 20:17 /sys/class/backlight/intel_backlight/actual_brightness
但是當我嘗試用下面的代碼讀取它在Lua我得到許可被拒絕的錯誤。請有人解釋我爲什麼?如何在不更改權限的情況下讀取文件?
file = io.popen('/sys/class/backlight/intel_backlight/actual_brightness', 'r')
output = file:read('*all')
file:close()
該錯誤消息(與在LUA殼鍵入的代碼放在一起:
12 awesome % lua
Lua 5.2.1 Copyright (C) 1994-2012 Lua.org, PUC-Rio
> file = assert(io.popen('/sys/class/backlight/intel_backlight/actual_brightness', 'r'))
> sh: /sys/class/backlight/intel_backlight/actual_brightness: Permission denied
^C