add process outline

This commit is contained in:
Alfonso Gamboa 2022-04-20 01:56:19 -07:00
parent 3f1c819276
commit bb2fd3b362

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@ -1 +1,47 @@
# process # 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