How can I run a custom .sh script at each startup (without native init.d support)?

Question

This looks like a general concern of rookie Android system players who have just rooted their phones. The most prevalent method may be throwing your script into /system/etc/init.d. If the ROM supports init.d then Voila but that's not always the case. So



How can I run my custom script at each startup? What's the user/group my script will be running as if I use your solution?





We welcome all kinds of solutions.


— iBug | Sources

Answer

Simple way (working):




  1. Prepare your post boot commands in a script, say /system/xbin/post-boot (set exec perm)


  2. Add the above custom script path at the end of /system/etc/init.qcom.post_boot.sh




Eg:



# echo /system/xbin/post-boot >> /system/etc/init.qcom.post_boot.sh


Done!



(If you can't find the qcom post_boot (Qualcomm devices), look for any post_boot scripts)


— Seff | Sources

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