Question

我有一个要求, 我需要读取一个界面( says /sys/ module/my_ file/ paraters/ val), 然后根据它的价值在另一个界面上写一些值。这必须在 insit. rc 中进行。

水流会像这样

if ( read /sys/module/my_file/parameters/val == "yes") then
write /sys/devices/platform/target_file/val 100

有人能帮我做同样的事吗?

Answer 1

您可以使用 exec stanza 执行此项 :

exec <path> [ <argument> ]*
   Fork and execute a program (<path>). This will block until
   the program completes execution. It is best to avoid exec
   as unlike the builtin commands, it runs the risk of getting
   init "stuck".

详情见https://github.com/android/platform_system_crecore/blob/master/init/readme.txt 。

Example: Move your code into a script (my_script.sh). Add this to your init.rc

on boot:
  ...
  exec /path/to/my_script.sh

Answer 2

您可以使用 Init 的服务概念运行脚本。下面是代码样本表 init 脚本. rc 文件。

chmod 0750 /system/bin/myscript.sh
start script
[...]
service script /system/bin/myscript.sh
    class main
    user root
    group root
    oneshot

友情链接