From bb2fd3b362b2f6776379302b32a69180488e9c5a Mon Sep 17 00:00:00 2001
From: Alfonso Gamboa <gtxent@gmail.com>
Date: Wed, 20 Apr 2022 01:56:19 -0700
Subject: [PATCH] add process outline

---
 build.md | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/build.md b/build.md
index 8a7fb7a..569196d 100644
--- a/build.md
+++ b/build.md
@@ -1 +1,47 @@
 # process
+
+
+build kernel with initramfs
+
+initramfs ```/etc/init``` runs ```exec busybox switch_root /v3 /opt/wz_mini/etc/init.d/v3_init.sh```
+
+```/opt/wz_mini/etc/init.d/v3_init.sh``` 
+
+bind replace ```/etc/init.d/inittab``` with out own version that has rcS located at ```/opt/wz_mini/tmp/.storage/rcS```
+
+bind replaces ```/etc/profile```
+mounts ```/tmp``` and ```/run```
+mounts ```/system```
+bind replaces ```/system/bin/factorycheck```, this program unmounts the binds that we do later in the file, its a debug program.
+bind replaces ```/etc/fstab```
+
+creates wz_mini's workplace directory at ```/opt/wz_mini/tmp```
+copies the stock ```/etc/init.d/rcS``` to the workplace directory
+modifies the stock rcS, adds ```set -x``` debug mode and injects the following script ```/opt/wz_mini/etc/init.d/v3_post.sh``` ro run
+
+bind replaces ```/etc/shadow``` to change the stock password
+
+checks to see if the swap archive is present at ```/opt/wz_mini/swap.gz```, if it is, extracts it, then mkswap's it, and drops the vm cache.
+
+check to see if the ```/opt/wz_mini/usr/share/terminfo``` directory is present, if not, extract the terminfo files for console programs
+
+mounts ```/configs``` to check if the ```.ssh``` dir is present, a requirement for the dropbear ssh server
+
+checks to see if ```/opt/wz_mini/run_mmc.sh``` has debug mode enabled, if it does, skip loading ```/system/bin/app_init.sh``` and ```/media/mmc/wz_mini/run_mmc.sh```
+
+run ```/media/mmc/wz_mini/run_mmc.sh```, but delay execution for 30 seconds, enough time for WiFi or wired ethernet/usb to load and connect successfully to the internet
+
+runs ```/linuxrc``` to kick off the stock boot process
+
+our modified inittab runs from ```/opt/wz_mini/tmp/.storage/rcS```, we have enabled set -x debug info, added ```/opt/wz_mini/bin``` and ```/opt/wz_mini/lib``` to the system PATH's, and added ```/opt/wz_mini/etc/init.d/v3_post.sh``` to run before ```/system/init/app_init.sh``` runs.
+
+```/opt/wz_mini/etc/init.d/v3_post.sh``` checks if ```run_mmc.sh``` has the RTSP server enabled, and if it does, we copy ```/system/bin/iCamera``` to our workplace directory at ```/opt/wz_mini/tmp/.storage/```
+
+bind replace ```/system/bin/iCamera```
+
+our version of iCamera is a script which injects the libcallback.so library as LD_PRELOAD to hook the Audio and Video to the RTSP Server, calling iCamera from it's new home at ```/opt/wz_mini/tmp/.storage/```
+
+we then load the video loopback driver from ```/opt/wz_mini/lib/modules/v4l2loopback.ko```
+
+```/system/bin/app_init.sh``` loads the stock system software
+