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https://github.com/nchevsky/systemrescue-zfs.git
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14cf12d01b
Arch's initcpio automatic creates global variables in the form of variable=y to kernel command line options without a suffix. See parse_cmdline_item(): https://git.archlinux.org/mkinitcpio.git/tree/init_functions
89 lines
3 KiB
Plaintext
89 lines
3 KiB
Plaintext
run_hook() {
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[[ "${findroot}" == "y" ]] || return
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# Initialisation
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local newroot="/new_root"
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local rootdev=""
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local rootcount=0
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local menuchoices=""
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modprobe -a -q dm-crypt >/dev/null 2>&1
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echo "Searching for block devices ..."
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sleep 2
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# Prepare access to luks encrypted block devices
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local cryptdev="$(blkid -t TYPE='crypto_LUKS' -o device)"
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for curdev in ${cryptdev}
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do
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if cryptsetup isLuks ${curdev} >/dev/null 2>&1
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then
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echo "A passphrase is required to access device ${curdev}:"
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local cryptname="${curdev##*/}"
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local cryptargs=""
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while ! eval cryptsetup open --type luks ${curdev} ${cryptname} ${cryptargs}
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do
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sleep 2;
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done
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if [ ! -e "/dev/mapper/${cryptname}" ]
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then
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err "Password succeeded but ${cryptname} creation failed, aborting..."
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launch_interactive_shell --exec
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fi
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echo "Have successfully prepared access to encrypted device ${curdev}"
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fi
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done
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# Show list of accessible block devices
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echo "====================================================================="
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lsblk --list --paths --output=name,size,fstype,label
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echo "====================================================================="
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sleep 5
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# Attempt to find a filesystem which contains /sbin/init
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local devlist=$(lsblk --list --noheadings --paths --output=name)
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for curdev in ${devlist}
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do
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echo "Checking for ${init} on device ${curdev} ..."
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if mount -r ${curdev} ${newroot} 2>/dev/null
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then
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if test -x ${newroot}/${init}
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then
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echo "Found ${init} on device ${curdev}"
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rootcount=$((rootcount + 1))
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menuchoices="${menuchoices} ${curdev} ${curdev}"
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fi
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umount ${newroot}
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fi
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done
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# Fail if no root filesystem has been found
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if [ ${rootcount} -eq 0 ]
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then
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err "Failed to find ${init} on any block device, cannot continue"
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launch_interactive_shell --exec
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fi
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# Get the user to select the device from which to start
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rootdev=$(whiptail --nocancel --title "Boot Linux OS from the disk" \
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--fb --menu "From which device do you want to boot ?" \
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--noitem 15 60 4 ${menuchoices} 3>&1 1>&2 2>&3)
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# Make sure the choice is a valid block device
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if ! lsblk --nodeps ${rootdev} >/dev/null 2>/dev/null
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then
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err "Choice ${rootdev} is not a valid block device"
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launch_interactive_shell --exec
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fi
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read -p "Press enter to boot from ${rootdev}"
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echo "Mounting device ${rootdev} ..."
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if ! mount ${rootdev} ${newroot}
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then
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err "Failed to mount ${rootdev} in read-write mode"
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launch_interactive_shell --exec
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fi
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rdlogger_stop
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exec env -i "TERM=$TERM" /usr/bin/switch_root ${newroot} ${init} "$@"
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}
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