I have a read-only rootfs that I want to update from a userspace program. My rootfs is actually a CRAMFS image in a block device called /dev/mtdblock/1 which can be written to as /dev/mtd/1. Here is my plan: 1. losetup /dev/loop/0 /path/to/new_rootfs.img 2. mount /dev/loop/0 /mnt/newroot 3. cd /mnt/new-root 4. pivot_root . oldroot 5. exec chroot . sh <dev/console >dev/console 2>&1 6. umount oldroot 7. dd if=/path/to/new_rootfs.img of=/dev/mtd/1 8. reboot The problem is that I have all these applications still running on the old root fs. Can I pivot_root out from under them? If not, how else can I disable them all so that I can rewrite the CRAMFS root filesystem? Thanks, Dave -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
