Alfonso Gamboa
2.6 KiB
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 our 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 with our own version which includes /opt/wz_mini/tmp as a tmpfs path
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