44e289f93b
This makes predictable interfaces names available as soon as possible with udev by adding the default network link units to initrd which are read by udev. Also adds some udev rules that are needed but which would normally loaded from the udev store path which is not included in the initrd.
605 lines
17 KiB
Bash
605 lines
17 KiB
Bash
#! @shell@
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targetRoot=/mnt-root
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console=tty1
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extraUtils="@extraUtils@"
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export LD_LIBRARY_PATH=@extraUtils@/lib
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export PATH=@extraUtils@/bin
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ln -s @extraUtils@/bin /bin
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# Copy the secrets to their needed location
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if [ -d "@extraUtils@/secrets" ]; then
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for secret in $(cd "@extraUtils@/secrets"; find . -type f); do
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mkdir -p $(dirname "/$secret")
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ln -s "@extraUtils@/secrets/$secret" "$secret"
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done
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fi
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# Stop LVM complaining about fd3
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export LVM_SUPPRESS_FD_WARNINGS=true
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fail() {
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if [ -n "$panicOnFail" ]; then exit 1; fi
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@preFailCommands@
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# If starting stage 2 failed, allow the user to repair the problem
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# in an interactive shell.
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cat <<EOF
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An error occurred in stage 1 of the boot process, which must mount the
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root filesystem on \`$targetRoot' and then start stage 2. Press one
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of the following keys:
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EOF
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if [ -n "$allowShell" ]; then cat <<EOF
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i) to launch an interactive shell
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f) to start an interactive shell having pid 1 (needed if you want to
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start stage 2's init manually)
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EOF
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fi
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cat <<EOF
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r) to reboot immediately
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*) to ignore the error and continue
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EOF
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read -n 1 reply
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if [ -n "$allowShell" -a "$reply" = f ]; then
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exec setsid @shell@ -c "exec @shell@ < /dev/$console >/dev/$console 2>/dev/$console"
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elif [ -n "$allowShell" -a "$reply" = i ]; then
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echo "Starting interactive shell..."
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setsid @shell@ -c "exec @shell@ < /dev/$console >/dev/$console 2>/dev/$console" || fail
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elif [ "$reply" = r ]; then
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echo "Rebooting..."
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reboot -f
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else
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echo "Continuing..."
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fi
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}
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trap 'fail' 0
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# Print a greeting.
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echo
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echo "[1;32m<<< NixOS Stage 1 >>>[0m"
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echo
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# Make several required directories.
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mkdir -p /etc/udev
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touch /etc/fstab # to shut up mount
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ln -s /proc/mounts /etc/mtab # to shut up mke2fs
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touch /etc/udev/hwdb.bin # to shut up udev
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touch /etc/initrd-release
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# Function for waiting a device to appear.
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waitDevice() {
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local device="$1"
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# USB storage devices tend to appear with some delay. It would be
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# great if we had a way to synchronously wait for them, but
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# alas... So just wait for a few seconds for the device to
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# appear.
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if test ! -e $device; then
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echo -n "waiting for device $device to appear..."
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try=20
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while [ $try -gt 0 ]; do
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sleep 1
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# also re-try lvm activation now that new block devices might have appeared
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lvm vgchange -ay
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# and tell udev to create nodes for the new LVs
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udevadm trigger --action=add
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if test -e $device; then break; fi
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echo -n "."
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try=$((try - 1))
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done
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echo
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[ $try -ne 0 ]
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fi
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}
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# Mount special file systems.
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specialMount() {
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local device="$1"
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local mountPoint="$2"
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local options="$3"
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local fsType="$4"
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mkdir -m 0755 -p "$mountPoint"
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mount -n -t "$fsType" -o "$options" "$device" "$mountPoint"
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}
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source @earlyMountScript@
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# Log the script output to /dev/kmsg or /run/log/stage-1-init.log.
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mkdir -p /tmp
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mkfifo /tmp/stage-1-init.log.fifo
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logOutFd=8 && logErrFd=9
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eval "exec $logOutFd>&1 $logErrFd>&2"
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if test -w /dev/kmsg; then
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tee -i < /tmp/stage-1-init.log.fifo /proc/self/fd/"$logOutFd" | while read -r line; do
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if test -n "$line"; then
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echo "<7>stage-1-init: $line" > /dev/kmsg
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fi
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done &
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else
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mkdir -p /run/log
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tee -i < /tmp/stage-1-init.log.fifo /run/log/stage-1-init.log &
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fi
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exec > /tmp/stage-1-init.log.fifo 2>&1
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# Process the kernel command line.
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export stage2Init=/init
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for o in $(cat /proc/cmdline); do
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case $o in
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console=*)
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set -- $(IFS==; echo $o)
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params=$2
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set -- $(IFS=,; echo $params)
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console=$1
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;;
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init=*)
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set -- $(IFS==; echo $o)
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stage2Init=$2
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;;
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boot.trace|debugtrace)
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# Show each command.
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set -x
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;;
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boot.shell_on_fail)
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allowShell=1
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;;
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boot.debug1|debug1) # stop right away
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allowShell=1
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fail
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;;
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boot.debug1devices) # stop after loading modules and creating device nodes
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allowShell=1
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debug1devices=1
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;;
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boot.debug1mounts) # stop after mounting file systems
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allowShell=1
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debug1mounts=1
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;;
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boot.panic_on_fail|stage1panic=1)
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panicOnFail=1
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;;
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root=*)
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# If a root device is specified on the kernel command
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# line, make it available through the symlink /dev/root.
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# Recognise LABEL= and UUID= to support UNetbootin.
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set -- $(IFS==; echo $o)
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if [ $2 = "LABEL" ]; then
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root="/dev/disk/by-label/$3"
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elif [ $2 = "UUID" ]; then
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root="/dev/disk/by-uuid/$3"
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else
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root=$2
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fi
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ln -s "$root" /dev/root
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;;
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copytoram)
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copytoram=1
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;;
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findiso=*)
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# if an iso name is supplied, try to find the device where
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# the iso resides on
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set -- $(IFS==; echo $o)
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isoPath=$2
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;;
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esac
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done
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# Set hostid before modules are loaded.
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# This is needed by the spl/zfs modules.
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@setHostId@
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# Load the required kernel modules.
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mkdir -p /lib
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ln -s @modulesClosure@/lib/modules /lib/modules
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ln -s @modulesClosure@/lib/firmware /lib/firmware
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echo @extraUtils@/bin/modprobe > /proc/sys/kernel/modprobe
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for i in @kernelModules@; do
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echo "loading module $(basename $i)..."
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modprobe $i
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done
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# Create device nodes in /dev.
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@preDeviceCommands@
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echo "running udev..."
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mkdir -p /etc/systemd
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ln -sfn @linkUnits@ /etc/systemd/network
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mkdir -p /etc/udev
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ln -sfn @udevRules@ /etc/udev/rules.d
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mkdir -p /dev/.mdadm
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systemd-udevd --daemon
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udevadm trigger --action=add
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udevadm settle
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# XXX: Use case usb->lvm will still fail, usb->luks->lvm is covered
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@preLVMCommands@
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echo "starting device mapper and LVM..."
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lvm vgchange -ay
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if test -n "$debug1devices"; then fail; fi
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@postDeviceCommands@
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# Return true if the machine is on AC power, or if we can't determine
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# whether it's on AC power.
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onACPower() {
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! test -d "/proc/acpi/battery" ||
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! ls /proc/acpi/battery/BAT[0-9]* > /dev/null 2>&1 ||
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! cat /proc/acpi/battery/BAT*/state | grep "^charging state" | grep -q "discharg"
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}
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# Check the specified file system, if appropriate.
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checkFS() {
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local device="$1"
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local fsType="$2"
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# Only check block devices.
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if [ ! -b "$device" ]; then return 0; fi
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# Don't check ROM filesystems.
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if [ "$fsType" = iso9660 -o "$fsType" = udf ]; then return 0; fi
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# Don't check resilient COWs as they validate the fs structures at mount time
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if [ "$fsType" = btrfs -o "$fsType" = zfs -o "$fsType" = bcachefs ]; then return 0; fi
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# Skip fsck for nilfs2 - not needed by design and no fsck tool for this filesystem.
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if [ "$fsType" = nilfs2 ]; then return 0; fi
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# Skip fsck for inherently readonly filesystems.
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if [ "$fsType" = squashfs ]; then return 0; fi
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# If we couldn't figure out the FS type, then skip fsck.
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if [ "$fsType" = auto ]; then
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echo 'cannot check filesystem with type "auto"!'
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return 0
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fi
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# Device might be already mounted manually
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# e.g. NBD-device or the host filesystem of the file which contains encrypted root fs
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if mount | grep -q "^$device on "; then
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echo "skip checking already mounted $device"
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return 0
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fi
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# Optionally, skip fsck on journaling filesystems. This option is
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# a hack - it's mostly because e2fsck on ext3 takes much longer to
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# recover the journal than the ext3 implementation in the kernel
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# does (minutes versus seconds).
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if test -z "@checkJournalingFS@" -a \
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\( "$fsType" = ext3 -o "$fsType" = ext4 -o "$fsType" = reiserfs \
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-o "$fsType" = xfs -o "$fsType" = jfs -o "$fsType" = f2fs \)
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then
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return 0
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fi
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# Don't run `fsck' if the machine is on battery power. !!! Is
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# this a good idea?
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if ! onACPower; then
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echo "on battery power, so no \`fsck' will be performed on \`$device'"
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return 0
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fi
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echo "checking $device..."
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fsckFlags=
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if test "$fsType" != "btrfs"; then
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fsckFlags="-V -a"
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fi
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fsck $fsckFlags "$device"
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fsckResult=$?
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if test $(($fsckResult | 2)) = $fsckResult; then
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echo "fsck finished, rebooting..."
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sleep 3
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reboot -f
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fi
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if test $(($fsckResult | 4)) = $fsckResult; then
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echo "$device has unrepaired errors, please fix them manually."
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fail
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fi
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if test $fsckResult -ge 8; then
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echo "fsck on $device failed."
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fail
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fi
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return 0
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}
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# Function for mounting a file system.
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mountFS() {
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local device="$1"
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local mountPoint="$2"
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local options="$3"
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local fsType="$4"
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if [ "$fsType" = auto ]; then
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fsType=$(blkid -o value -s TYPE "$device")
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if [ -z "$fsType" ]; then fsType=auto; fi
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fi
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# Filter out x- options, which busybox doesn't do yet.
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local optionsFiltered="$(IFS=,; for i in $options; do if [ "${i:0:2}" != "x-" ]; then echo -n $i,; fi; done)"
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# Prefix (lower|upper|work)dir with /mnt-root (overlayfs)
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local optionsPrefixed="$( echo "$optionsFiltered" | sed -E 's#\<(lowerdir|upperdir|workdir)=#\1=/mnt-root#g' )"
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echo "$device /mnt-root$mountPoint $fsType $optionsPrefixed" >> /etc/fstab
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checkFS "$device" "$fsType"
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# Optionally resize the filesystem.
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case $options in
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*x-nixos.autoresize*)
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if [ "$fsType" = ext2 -o "$fsType" = ext3 -o "$fsType" = ext4 ]; then
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echo "resizing $device..."
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e2fsck -fp "$device"
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resize2fs "$device"
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elif [ "$fsType" = f2fs ]; then
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echo "resizing $device..."
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fsck.f2fs -fp "$device"
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resize.f2fs "$device"
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fi
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;;
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esac
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# Create backing directories for overlayfs
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if [ "$fsType" = overlay ]; then
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for i in upper work; do
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dir="$( echo "$optionsPrefixed" | grep -o "${i}dir=[^,]*" )"
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mkdir -m 0700 -p "${dir##*=}"
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done
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fi
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echo "mounting $device on $mountPoint..."
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mkdir -p "/mnt-root$mountPoint"
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# For CIFS mounts, retry a few times before giving up.
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local n=0
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while true; do
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mount "/mnt-root$mountPoint" && break
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if [ "$fsType" != cifs -o "$n" -ge 10 ]; then fail; break; fi
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echo "retrying..."
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n=$((n + 1))
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done
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[ "$mountPoint" == "/" ] &&
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[ -f "/mnt-root/etc/NIXOS_LUSTRATE" ] &&
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lustrateRoot "/mnt-root"
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true
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}
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lustrateRoot () {
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local root="$1"
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echo
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echo -e "\e[1;33m<<< NixOS is now lustrating the root filesystem (cruft goes to /old-root) >>>\e[0m"
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echo
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mkdir -m 0755 -p "$root/old-root.tmp"
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echo
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echo "Moving impurities out of the way:"
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for d in "$root"/*
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do
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[ "$d" == "$root/nix" ] && continue
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[ "$d" == "$root/boot" ] && continue # Don't render the system unbootable
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[ "$d" == "$root/old-root.tmp" ] && continue
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mv -v "$d" "$root/old-root.tmp"
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done
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# Use .tmp to make sure subsequent invokations don't clash
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mv -v "$root/old-root.tmp" "$root/old-root"
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mkdir -m 0755 -p "$root/etc"
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touch "$root/etc/NIXOS"
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exec 4< "$root/old-root/etc/NIXOS_LUSTRATE"
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echo
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echo "Restoring selected impurities:"
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while read -u 4 keeper; do
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dirname="$(dirname "$keeper")"
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mkdir -m 0755 -p "$root/$dirname"
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cp -av "$root/old-root/$keeper" "$root/$keeper"
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done
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exec 4>&-
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}
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if test -e /sys/power/resume -a -e /sys/power/disk; then
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if test -n "@resumeDevice@" && waitDevice "@resumeDevice@"; then
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resumeDev="@resumeDevice@"
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resumeInfo="$(udevadm info -q property "$resumeDev" )"
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else
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for sd in @resumeDevices@; do
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# Try to detect resume device. According to Ubuntu bug:
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# https://bugs.launchpad.net/ubuntu/+source/pm-utils/+bug/923326/comments/1
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# when there are multiple swap devices, we can't know where the hibernate
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# image will reside. We can check all of them for swsuspend blkid.
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if waitDevice "$sd"; then
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resumeInfo="$(udevadm info -q property "$sd")"
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if [ "$(echo "$resumeInfo" | sed -n 's/^ID_FS_TYPE=//p')" = "swsuspend" ]; then
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resumeDev="$sd"
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break
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fi
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fi
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done
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fi
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if test -n "$resumeDev"; then
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resumeMajor="$(echo "$resumeInfo" | sed -n 's/^MAJOR=//p')"
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resumeMinor="$(echo "$resumeInfo" | sed -n 's/^MINOR=//p')"
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echo "$resumeMajor:$resumeMinor" > /sys/power/resume 2> /dev/null || echo "failed to resume..."
|
||
fi
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fi
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# If we have a path to an iso file, find the iso and link it to /dev/root
|
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if [ -n "$isoPath" ]; then
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mkdir -p /findiso
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for delay in 5 10; do
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blkid | while read -r line; do
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device=$(echo "$line" | sed 's/:.*//')
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type=$(echo "$line" | sed 's/.*TYPE="\([^"]*\)".*/\1/')
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mount -t "$type" "$device" /findiso
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if [ -e "/findiso$isoPath" ]; then
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ln -sf "/findiso$isoPath" /dev/root
|
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break 2
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else
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umount /findiso
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fi
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||
done
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sleep "$delay"
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||
done
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fi
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# Try to find and mount the root device.
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mkdir -p $targetRoot
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exec 3< @fsInfo@
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||
while read -u 3 mountPoint; do
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read -u 3 device
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read -u 3 fsType
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read -u 3 options
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||
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||
# !!! Really quick hack to support bind mounts, i.e., where the
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# "device" should be taken relative to /mnt-root, not /. Assume
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# that every device that starts with / but doesn't start with /dev
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# is a bind mount.
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pseudoDevice=
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case $device in
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/dev/*)
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;;
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//*)
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# Don't touch SMB/CIFS paths.
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pseudoDevice=1
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;;
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/*)
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device=/mnt-root$device
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;;
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*)
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# Not an absolute path; assume that it's a pseudo-device
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# like an NFS path (e.g. "server:/path").
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pseudoDevice=1
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;;
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esac
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|
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if test -z "$pseudoDevice" && ! waitDevice "$device"; then
|
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# If it doesn't appear, try to mount it anyway (and
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# probably fail). This is a fallback for non-device "devices"
|
||
# that we don't properly recognise.
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echo "Timed out waiting for device $device, trying to mount anyway."
|
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fi
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|
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# Wait once more for the udev queue to empty, just in case it's
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# doing something with $device right now.
|
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udevadm settle
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# If copytoram is enabled: skip mounting the ISO and copy its content to a tmpfs.
|
||
if [ -n "$copytoram" ] && [ "$device" = /dev/root ] && [ "$mountPoint" = /iso ]; then
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fsType=$(blkid -o value -s TYPE "$device")
|
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fsSize=$(blockdev --getsize64 "$device")
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|
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mkdir -p /tmp-iso
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mount -t "$fsType" /dev/root /tmp-iso
|
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mountFS tmpfs /iso size="$fsSize" tmpfs
|
||
|
||
cp -r /tmp-iso/* /mnt-root/iso/
|
||
|
||
umount /tmp-iso
|
||
rmdir /tmp-iso
|
||
continue
|
||
fi
|
||
|
||
mountFS "$device" "$mountPoint" "$options" "$fsType"
|
||
done
|
||
|
||
exec 3>&-
|
||
|
||
|
||
@postMountCommands@
|
||
|
||
|
||
# Emit a udev rule for /dev/root to prevent systemd from complaining.
|
||
if [ -e /mnt-root/iso ]; then
|
||
eval $(udevadm info --export --export-prefix=ROOT_ --device-id-of-file=/mnt-root/iso)
|
||
else
|
||
eval $(udevadm info --export --export-prefix=ROOT_ --device-id-of-file=$targetRoot)
|
||
fi
|
||
if [ "$ROOT_MAJOR" -a "$ROOT_MINOR" -a "$ROOT_MAJOR" != 0 ]; then
|
||
mkdir -p /run/udev/rules.d
|
||
echo 'ACTION=="add|change", SUBSYSTEM=="block", ENV{MAJOR}=="'$ROOT_MAJOR'", ENV{MINOR}=="'$ROOT_MINOR'", SYMLINK+="root"' > /run/udev/rules.d/61-dev-root-link.rules
|
||
fi
|
||
|
||
|
||
# Stop udevd.
|
||
udevadm control --exit
|
||
|
||
# Reset the logging file descriptors.
|
||
# Do this just before pkill, which will kill the tee process.
|
||
exec 1>&$logOutFd 2>&$logErrFd
|
||
eval "exec $logOutFd>&- $logErrFd>&-"
|
||
|
||
# Kill any remaining processes, just to be sure we're not taking any
|
||
# with us into stage 2. But keep storage daemons like unionfs-fuse.
|
||
#
|
||
# Storage daemons are distinguished by an @ in front of their command line:
|
||
# https://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons/
|
||
for pid in $(pgrep -v -f '^@'); do
|
||
# Make sure we don't kill kernel processes, see #15226 and:
|
||
# http://stackoverflow.com/questions/12213445/identifying-kernel-threads
|
||
readlink "/proc/$pid/exe" &> /dev/null || continue
|
||
# Try to avoid killing ourselves.
|
||
[ $pid -eq $$ ] && continue
|
||
kill -9 "$pid"
|
||
done
|
||
|
||
if test -n "$debug1mounts"; then fail; fi
|
||
|
||
|
||
# Restore /proc/sys/kernel/modprobe to its original value.
|
||
echo /sbin/modprobe > /proc/sys/kernel/modprobe
|
||
|
||
|
||
# Start stage 2. `switch_root' deletes all files in the ramfs on the
|
||
# current root. Note that $stage2Init might be an absolute symlink,
|
||
# in which case "-e" won't work because we're not in the chroot yet.
|
||
if [ ! -e "$targetRoot/$stage2Init" ] && [ ! -L "$targetRoot/$stage2Init" ] ; then
|
||
echo "stage 2 init script ($targetRoot/$stage2Init) not found"
|
||
fail
|
||
fi
|
||
|
||
mkdir -m 0755 -p $targetRoot/proc $targetRoot/sys $targetRoot/dev $targetRoot/run
|
||
|
||
mount --move /proc $targetRoot/proc
|
||
mount --move /sys $targetRoot/sys
|
||
mount --move /dev $targetRoot/dev
|
||
mount --move /run $targetRoot/run
|
||
|
||
exec env -i $(type -P switch_root) "$targetRoot" "$stage2Init"
|
||
|
||
fail # should never be reached
|