This makes the initrd a few megabytes smaller. * Use run-init from klibc to delete everything in the initrd ramfs prior to switching to the real root FS. * Removed the stage2Init argument. svn path=/nixos/trunk/; revision=12544
253 lines
5.8 KiB
Bash
253 lines
5.8 KiB
Bash
#! @staticShell@
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fail() {
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# If starting stage 2 failed, start an interactive shell.
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echo "Stage 2 failed, starting emergency shell..."
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echo "(Stage 1 init script is $stage2Init)"
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exec @staticShell@
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}
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# Print a greeting.
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echo
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echo "<<< NixOS Stage 1 >>>"
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echo
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# Set the PATH.
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export PATH=/empty
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for i in @path@; do
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PATH=$PATH:$i/bin
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if test -e $i/sbin; then
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PATH=$PATH:$i/sbin
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fi
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done
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# Mount special file systems.
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mkdir -p /etc # to shut up mount
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echo -n > /etc/fstab # idem
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mkdir -p /proc
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mount -t proc none /proc
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mkdir -p /sys
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mount -t sysfs none /sys
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# Process the kernel command line.
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stage2Init=
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for o in $(cat /proc/cmdline); do
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case $o in
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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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debugtrace)
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# Show each command.
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set -x
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;;
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debug1) # stop right away
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fail
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;;
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debug1devices) # stop after loading modules and creating device nodes
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debug1devices=1
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;;
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debug1mounts) # stop after mounting file systems
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debug1mounts=1
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;;
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esac
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done
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# Load some kernel modules.
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export MODULE_DIR=@modulesDir@/lib/modules/
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for i in @modules@; do
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echo "trying to load $i..."
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modprobe $i
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done
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# Create /dev/null.
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mknod /dev/null c 1 3
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# Try to resume - all modules are loaded now.
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if test -e /sys/power/tuxonice/resume; then
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if test -n "$(cat /sys/power/tuxonice/resume)"; then
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echo 0 > /sys/power/tuxonice/user_interface/enabled
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echo 1 > /sys/power/tuxonice/do_resume || echo "Failed to resume..."
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fi
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fi
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echo "@resumeDevice@" > /sys/power/resume 2> /dev/null || echo "Failed to resume..."
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echo shutdown > /sys/power/disk
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# Create device nodes in /dev.
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export UDEV_CONFIG_FILE=/udev.conf
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echo 'udev_rules="/no-rules"' > $UDEV_CONFIG_FILE
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echo -n > /no-rules
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udevd --daemon
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udevadm trigger
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udevadm settle
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if type -p dmsetup > /dev/null; then
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echo "dmsetup found, starting device mapper and lvm"
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dmsetup mknodes
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lvm vgscan --ignorelockingfailure
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lvm vgchange -ay --ignorelockingfailure
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fi
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if test -n "$debug1devices"; then fail; fi
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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="$4"
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# Check the root device, if .
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mustCheck=
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if test -b "$device"; then
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mustCheck=1
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else
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case $device in
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LABEL=*)
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mustCheck=1
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;;
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esac
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fi
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if test -n "$mustCheck"; then
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FSTAB_FILE="/etc/mtab" fsck -V -v -C -a "$device"
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fsckResult=$?
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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
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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 $device failed."
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fail
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fi
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fi
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# Mount read-writable.
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mount -t "$fsType" -o "$options" "$device" /mnt-root$mountPoint || fail
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}
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# Try to find and mount the root device.
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mkdir /mnt-root
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echo "mounting the root device.... (fix: sleeping 5 seconds to wait for upcoming usb drivers)"
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sleep 5
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if test -n "@autoDetectRootDevice@"; then
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# Look for the root device by label.
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echo "probing for the NixOS installation CD..."
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for i in /sys/block/*; do
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if test "$(cat $i/removable)" = "1"; then
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echo " in $i..."
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set -- $(IFS=: ; echo $(cat $i/dev))
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major="$1"
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minor="$2"
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# Create a device node for this device.
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nuke /dev/tmpdev # don't have `rm' in klibc
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mknod /dev/tmpdev b "$major" "$minor"
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if mount -o ro -t iso9660 /dev/tmpdev /mnt-root; then
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if test -e "/mnt-root/@rootLabel@"; then
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found=1
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break
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fi
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umount /mnt-root
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fi
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fi
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done
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if test -z "$found"; then
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echo "CD not found!"
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fail
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fi
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else
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# Hard-coded root device(s).
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mountPoints=(@mountPoints@)
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devices=(@devices@)
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fsTypes=(@fsTypes@)
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optionss=(@optionss@)
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for ((n = 0; n < ${#mountPoints[*]}; n++)); do
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mountPoint=${mountPoints[$n]}
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device=${devices[$n]}
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fsType=${fsTypes[$n]}
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options=${optionss[$n]}
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# !!! Really quick hack to support bind mounts, i.e., where
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# the "device" should be taken relative to /mnt-root, not /.
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# Assume that every device that start with / but doesn't
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# start with /dev or LABEL= is a bind mount.
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case $device in
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/dev/*)
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;;
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LABEL=*)
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;;
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/*)
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device=/mnt-root$device
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;;
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esac
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echo "mounting $device on $mountPoint..."
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mountFS "$device" "$mountPoint" "$options" "$fsType"
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done
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fi
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# If this is a live-CD/DVD, then union-mount a tmpfs on top of the
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# original root.
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targetRoot=/mnt-root
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if test -n "@isLiveCD@"; then
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mkdir /mnt-tmpfs
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mount -t tmpfs -o "mode=755" none /mnt-tmpfs
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mkdir /mnt-union
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mount -t aufs -o dirs=/mnt-tmpfs=rw:$targetRoot=ro none /mnt-union
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targetRoot=/mnt-union
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fi
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if test -n "$debug1mounts"; then fail; fi
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# `run-init' needs a /dev/console on the target FS.
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if ! test -e $targetRoot/dev/console; then
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mkdir -p $targetRoot/dev
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mknod $targetRoot/dev/console c 5 1
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fi
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# Start stage 2. `run-init' deletes all files in the ramfs on the
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# current /.
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if test -z "$stage2Init"; then fail; fi
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umount /sys
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umount /proc
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exec run-init "$targetRoot" "$stage2Init"
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fail
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