147 lines
2.9 KiB
Bash
147 lines
2.9 KiB
Bash
#! @shell@
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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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exec @shell@
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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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touch /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=@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=$2
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;;
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debugtrace)
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# Show each command.
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set -x
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;;
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debug1)
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fail
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;;
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esac
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done
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# Create device nodes in /dev.
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source @makeDevices@
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# Load some kernel modules.
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export MODULE_DIR=@modules@/lib/modules/
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modprobe ide-generic
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modprobe ide-disk
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modprobe ide-cd
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# Try to find and mount the root device.
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mkdir /mnt
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mkdir /mnt/root
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echo "mounting the root device..."
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if test -n "@autoDetectRootDevice@"; then
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# Look for the root device by label.
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echo "probing for the NixOS installation CD..."
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for i in /sys/devices/*/*/media; do
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if test "$(cat $i)" = "cdrom"; then
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# Hopefully `drivename' matches the device created in /dev.
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devName=/dev/$(cat $(dirname $i)/drivename)
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echo " in $devName..."
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if mount -n -o ro -t iso9660 $devName /mnt/root; then
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if test -e "/mnt/root/@rootLabel@"; then
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found=1
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break
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fi
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umount /mnt/root
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fi
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fi
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done
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if test -z "$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.
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rootDevice="@rootDevice@"
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# Check the root device.
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fsck -C -a "$rootDevice"
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fsckResult=$?
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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 -d !!! don't have reboot yet
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fail
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fi
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if test $(($fsckResult | 4)) = $fsckResult; then
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echo "$rootDevice 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 $rootDevice failed."
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fail
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fi
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# Mount read-writable.
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mount -n -o rw "$rootDevice" /mnt/root || fail
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fi
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# Start stage 2.
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# !!! Note: we can't use pivot_root here (the kernel gods have
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# decreed), but we could use run-init from klibc, which deletes all
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# files in the initramfs, remounts the target root on /, and chroots.
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cd /mnt/root
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mount --move . /
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umount /proc # cleanup
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umount /sys
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echo "INIT = $stage2Init"
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if test -z "$stage2Init"; then fail; fi
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exec chroot . $stage2Init
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fail
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