Hi,
I want to run initramfs to update emmc if image available au usb storage device script as follow
///////////////////////////////Installer.sh/////////////////////////////////////
#!/bin/sh
emmc="/dev/mmcblk1"
bootpart=“p1”
mpoint="";
usbdev="/dev/sda1"
egiimage="/mnt/egi/sdcard.img.bz2"
echo “egiimage=$egiimage”
if ! [ -b “$usbdev” ]
then
echo “USB Block Device not found!! $usbdev”
exit 3
else
mount /dev/sda1 /mnt/egi/
if ! [ -e “$egiimage” ]
then
umount /mnt/egi
echo “Egi Image not found!!”
exit 3
fi
fi
if [ -b “$emmc” ]
then
echo “SD card detected!!”
#dd if=$egiimage of=/dev/mmcblk1
mpoint="/dev/mmcblk1"
else
echo “SD card not detected!!”
#dd if=$egiimage of=/dev/mmcblk0
mpoint="/dev/mmcblk0"
fi
led blink logic
bzcat $egiimage | dd of=$mpoint
////////////////////////////////////////////////////////////////////////////
Above script tested and working fine when running from command line
For root file system I refer https://embedjournal.com/custom-rfs-beaglebone-black/
whereas I used my busybox and cross compiler which is used to build kernel uImage.
I created soft link init in / to /bin/busybox
and added above script .Installer.sh to etc/inittab as: