dell 的 Remove Operating System 代码

title Remove Operating System
    root (hd0,2)
    kernel /vmlinuz root=/dev/disk/by-label/root ro init=/sbin/remove-os.sh resume=/dev/sda5 splash=silent showopts
    initrd /initrd

dell:/sbin # cat remove-os.sh
#!/bin/sh
 
abort() {
    echo "OS removal ABORTED. System will reboot in 30 seconds."
    echo ""
    echo "NO CHANGES HAVE BEEN MADE TO THE HARD DISKS."
    sleep 30
    /etc/init.d/reboot
}
 
echo "Initializing keyboard..."
export PREVLEVEL=N
export RUNLEVEL=S
/etc/init.d/earlykbd start
 
CORRECT_ANSWER="REMOVE OPERATING SYSTEM"
 
echo -e "\n\n"
echo -e 'WARNING!    WARNING!   WARNING!'
echo -e ""
echo -e "This operation will remove the Operating System (OS) from your computer"
echo -e "All personal files on this system will be lost."
echo -e "The information will not be recoverable."
echo -e ""
echo -e "ALL DATA ON YOUR HARD DRIVES WILL BE PERMANENTLY AND IRRETRIEVABLY DESTROYED IF YOU CONTINUE.\n"
echo -e ""
echo -e "To proceed with the Operating System removal, please type: $CORRECT_ANSWER"
read -p      "Type any other text to abort: " answer
 
if [ "$answer" != "$CORRECT_ANSWER" ]; then
    abort
fi
 
echo
echo "Hard Drive erasure begins in 10 seconds. Power off system to abort (last chance)..."
sleep 10
 
# Remove all parts save N1
DRIVE=`fdisk -l | grep -m1 "Disk" | awk '{print $2}' | cut -d':' -f1`
echo "DRIVE = "$DRIVE
if [ ! -e $DRIVE ]; then break; fi
echo "0,0,0,-" | sfdisk -uS -N2 --force --no-reread $DRIVE
echo "0,0,0,-" | sfdisk -uS -N3 --force --no-reread $DRIVE
echo "0,0,0,-" | sfdisk -uS -N4 --force --no-reread $DRIVE
 
echo "Operating System has been removed. The system is now unbootable. You must reinstall an operating system for the computer."
sleep 600000