adding linux application to rootfs using LTIB

[garimella]

I am able to run a linux application on a custom MPC83x board using TFTP. I need to boot this application at start up which means storing in flash.

a)How should I add the application (say ./hello) in rootfile system using LTIB?

b) What is the method to invoke this application to run at startup?.

Searched many forums, but without pointed answers. A definitive guide would be helpful.

[Pavel]

Use the following command sequence for adding file to RAM disk image.

1. rename your RAM disk image to rootfs.ext2.gz.uboot
2. sudo apt-get install u-boot-tools

Following are the steps for adding files into rootfilesystem:

2. dd if=rootfs.ext2.gz.uboot of=rootfs.ext2.gz bs=64 skip=1

3. gunzip rootfs.ext2.gz

4. mkdir /mnt/iso_1

5. sudo mount -oloop rootfs.ext2 /mnt/iso_1

6. Now, one can copy files into appropriate location under “./mnt/iso_1” directory.

7. sudo umount /mnt/iso_1

8. gzip -9 rootfs.ext2

9. mkimage -A ppc -O linux -T ramdisk -C gzip -n 'rootfs.ext2.gz.uboot' -d rootfs.ext2.gz rootfs.ext2.gz.uboot

See also the following pages:

http://www.tldp.org/HOWTO/HighQuality-Apps-HOWTO/boot.html

and

https://stackoverflow.com/questions/7221757/run-automatically-program-on-startup-under-linux-ubuntu

Have a great day,
Pavel Chubakov

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[garimella]

Hi Pavel,

I was asking the same process through LTIB. I just saw hello listed is LTIB-c. Just want to similarly add my custom application such that it appears in LTIB -c to generate rootfs.

For auto start up, I went through the link sent by you. It says to add our applications at init.d. But during run time, this init.d resides in RAM. How do we store this in flash in the first place?. It is a novice question.