I've found the O'Reilly Embedded Android book to be really useful. It has a good section on init and might clear up a lot of your questions. Just keep in mind it is a little out of date and sometimes too high level, but it makes a good first step for a lot of Android platform questions.
On Friday, December 13, 2013 12:41:10 AM UTC-7, jui...@gmail.com wrote: > > Hi, > Because I was digging sources and Internet for long time with this topic > and didn't find some full documentation for this I dare to ask someone here. > I'm having some troubles with porting Android to some new device so that's > why I choose this group. > > During the study of init.rc doc ( > https://android.googlesource.com/platform/system/core/+/master/init/readme.txt) > > I had feeling that no one care about proper documentation. > Let see some example: > In readme.txt is written: > "Actions and Services implicitly declare a new section. All commands > > or options belong to the section most recently declared. Commands > or options before the first section are ignored." > > > Then I look into example file (from: > https://android.googlesource.com/platform/system/core/+/master/rootdir/init.rc) > and see, that firs command is the "include" but it is command (placed in > section commands in readme.txt) so it should be ignored. Why is not ignored? > Why is not proper described? What happen if I include file which is on > partition which isn't mounted at beginning? > > > Then I started looking closer and deeper and here is another example of lack > of lack of consistency: Triggers. > > readme.txt: > > "Actions take the form of: > > on <trigger> > <command> > > ... > > > Triggers > > ... > > boot > > ... > > <name>=<value> > > ... > > device-added-<path> > device-removed-<path> > > ... > > service-exited-<name> > > ..." > > > So what is that in example init.rc like: > > on early-init > > on init > > on fs > > on post-fs > > > There is no documentation for this (even "do not touch this sections"), no > definition in keywords.h or init_parser.c after digging more finally I have > it! In file init.c function main there is section of parsing those "Triggers" > but when this is triggered? Which goes first? How init recognizing that now > is "init" part of process, or "fs". > > > Then looking closer I see some another crucial label for init process called: > "charger". Where it is came from? Why some boot has "charger" option. When? > > Why this is not documented if this is important part of init process? > > > So is there any real, I mean REAL documentation for whole Android init > process? > Because this what is provided by AOSP is really poorly written. To not say > "slovenly". > > I will be really thankful for giving me some ideas and "breadcrumbs" for > understanding whole booting process in init part as well as what I should > care most with porting Android to new device. > > Thanks > Kamil > -- -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting --- You received this message because you are subscribed to the Google Groups "android-porting" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-porting+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
