122 lines
3.5 KiB
Bash
122 lines
3.5 KiB
Bash
#!/bin/sh
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# Setup booting from disk (USB or harddrive)
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# Requires: fdisk, df, tail, tr, cut, dd, sed
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# Make sure that we are root
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if [ $(id -u) -ne 0 ]; then
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echo "> $(basename $0): Must be root to install bootloader!" >&2
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exit 1
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fi
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# change working directory to dir from which we are started
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CWD="$(pwd)"
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BOOT="$(dirname "$0")"
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cd "$BOOT"
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# Program definitions
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INST_NAME=`basename $0`
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INST_PID=$$
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LOGFILE="/tmp/$INST_NAME-$INST_PID.log"
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# find out device and mountpoint
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PART="$(df . | tail -n 1 | tr -s " " | cut -d " " -f 1)"
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DEV="$(echo "$PART" | sed -r "s:[0-9]+\$::" | sed -r "s:([0-9])[a-z]+\$:\\1:i")" #"
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# Try to use installed extlinux binary and
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# fallback to extlinux.exe only if no installed
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# extlinux is not found at all.
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EXTLINUX="$(which extlinux 2>/dev/null)"
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if [ -z "$EXTLINUX" ]; then
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echo "> Falling back to included EXTLinux program..." >&2
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EXTLINUX="./extlinux.exe"
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fi
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# Prompt user
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#
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clear
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echo " +-+-+-+-+-+-+-+-+-+-+============+-+-+-+-+-+-+-+-+-+-+-+ "
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echo " Boot setup: MyLinux"
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echo " +-+-+-+-+-+-+-+-+-+-+============+-+-+-+-+-+-+-+-+-+-+-+ "
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echo " Current device: $DEV"
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echo " Current partition: $PART"
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echo " +-+-+-+-+-+-+-+-+-=+-+-+-+>--<+-+-+-+=-+-+-+-+-+-+-+-+-+ "
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echo " Thank you for choosing MyLinux!"
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echo " Are you sure that you wanna install MyLinux on"
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echo " this device? Make sure that you are not installing on"
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echo " your local drive!"
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echo " +-+-+-+-+-+-+-+-+-=+-+-+-+>--<+-+-+-+=-+-+-+-+-+-+-+-+-+ "
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echo " Just press 'Enter' to continue or press Ctrl-C"
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echo " to cancel the installation..."
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read -p ' What are you waiting for... ' junk
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# If he/she continues, check which disk are we on
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if [ "$DEV" = "/dev/sda" ] || [ "$DEV" = "/dev/hda" ]; then
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WARN_DISK=0
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else
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WARN_DISK=1
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fi
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if [ $WARN_DISK -eq 0 ]; then
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# APT-like danger prompt
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CONFIRM_TEXT="Yes, do as I say!"
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clear
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echo " ===================> DANGER! <======================" >&2
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echo " Current device: $DEV" >&2
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echo " Current partition: $PART" >&2
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echo " ====================================================" >&2
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echo " You are about to do something "
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echo " dangerous to your system!" >&2
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echo " ====================================================" >&2
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echo " Type in to continue: 'Yes, do as I say!'"
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read -p " ?] " CONFIRM
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if test "$CONFIRM" != "$CONFIRM_TEXT"; then
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echo "> Incorrect phrase!" >&2
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echo "> No changes were made!" >&2
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exit 1
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fi
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fi
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echo
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# notify user
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echo "> WARNING: Do not interrupt at this stage!" >&2
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echo "> Installing EXTLinux bootloader: Please wait..." >&2
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# install bootloader
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"$EXTLINUX" --install "$BOOT" 2>&1 | tee $LOGFILE | cat >&2
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if [ $? -ne 0 ]; then
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echo "> Failed to install boot loader!" >&2
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echo "> Please read the errors above (and/or" >&2
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echo "> consult the logfile at /tmp) and press Enter to exit." >&2
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read junk
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exit 1
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else
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echo "> Installation of EXTLinux bootloader was successful!"
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fi
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echo "> Initialising new MBR..." >&2
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# MBR
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if [ "$DEV" != "$PART" ]; then
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# Setup MBR on the first block
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dd bs=440 count=1 conv=notrunc if="$BOOT/mbr.bin" of="$DEV" 2>/dev/null
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# Toggle a bootable flag
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PART="$(echo "$PART" | sed -r "s:.*[^0-9]::")"
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(
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fdisk -l "$DEV" | fgrep "*" | fgrep "$DEV" | cut -d " " -f 1 \
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| sed -r "s:.*[^0-9]::" | xargs -I '{}' echo -ne "a\n{}\n"
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echo a
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echo $PART
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echo w
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) | fdisk $DEV >/dev/null 2>&1
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fi
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echo "Bootloader installation finished."
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cd "$CWD"
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