nixos/modules/system/boot/stage-2-init.sh

   1 #! @shell@
   2
   3 systemConfig=@systemConfig@
   4
   5 export HOME=/root PATH="@path@"
   6
   7
   8 if [ "${IN_NIXOS_SYSTEMD_STAGE1:-}" != true ]; then
   9     # Process the kernel command line.
  10     for o in $(</proc/cmdline); do
  11         case $o in
  12             boot.debugtrace)
  13                 # Show each command.
  14                 set -x
  15                 ;;
  16         esac
  17     done
  18
  19
  20     # Print a greeting.
  21     echo
  22     echo -e "\e[1;32m<<< @distroName@ Stage 2 >>>\e[0m"
  23     echo
  24
  25
  26     # Normally, stage 1 mounts the root filesystem read/writable.
  27     # However, in some environments, stage 2 is executed directly, and the
  28     # root is read-only.  So make it writable here.
  29     if [ -z "$container" ]; then
  30         mount -n -o remount,rw none /
  31     fi
  32 fi
  33
  34
  35 # Likewise, stage 1 mounts /proc, /dev and /sys, so if we don't have a
  36 # stage 1, we need to do that here.
  37 if [ ! -e /proc/1 ]; then
  38     specialMount() {
  39         local device="$1"
  40         local mountPoint="$2"
  41         local options="$3"
  42         local fsType="$4"
  43
  44         # We must not overwrite this mount because it's bind-mounted
  45         # from stage 1's /run
  46         if [ "${IN_NIXOS_SYSTEMD_STAGE1:-}" = true ] && [ "${mountPoint}" = /run ]; then
  47             return
  48         fi
  49
  50         install -m 0755 -d "$mountPoint"
  51         mount -n -t "$fsType" -o "$options" "$device" "$mountPoint"
  52     }
  53     source @earlyMountScript@
  54 fi
  55
  56
  57 if [ "${IN_NIXOS_SYSTEMD_STAGE1:-}" = true ] || [ ! -c /dev/kmsg ] ; then
  58     echo "booting system configuration ${systemConfig}"
  59 else
  60     echo "booting system configuration $systemConfig" > /dev/kmsg
  61 fi
  62
  63
  64 # Make /nix/store a read-only bind mount to enforce immutability of
  65 # the Nix store.  Note that we can't use "chown root:nixbld" here
  66 # because users/groups might not exist yet.
  67 # Silence chown/chmod to fail gracefully on a readonly filesystem
  68 # like squashfs.
  69 chown -f 0:30000 /nix/store
  70 chmod -f 1775 /nix/store
  71 if [ -n "@readOnlyNixStore@" ]; then
  72     if ! [[ "$(findmnt --noheadings --output OPTIONS /nix/store)" =~ ro(,|$) ]]; then
  73         if [ -z "$container" ]; then
  74             mount --bind /nix/store /nix/store
  75         else
  76             mount --rbind /nix/store /nix/store
  77         fi
  78         mount -o remount,ro,bind /nix/store
  79     fi
  80 fi
  81
  82
  83 if [ "${IN_NIXOS_SYSTEMD_STAGE1:-}" != true ]; then
  84     # Use /etc/resolv.conf supplied by systemd-nspawn, if applicable.
  85     if [ -n "@useHostResolvConf@" ] && [ -e /etc/resolv.conf ]; then
  86         resolvconf -m 1000 -a host </etc/resolv.conf
  87     fi
  88
  89
  90     # Log the script output to /dev/kmsg or /run/log/stage-2-init.log.
  91     # Only at this point are all the necessary prerequisites ready for these commands.
  92     exec {logOutFd}>&1 {logErrFd}>&2
  93     if test -w /dev/kmsg; then
  94         exec > >(tee -i /proc/self/fd/"$logOutFd" | while read -r line; do
  95             if test -n "$line"; then
  96                 echo "<7>stage-2-init: $line" > /dev/kmsg
  97             fi
  98         done) 2>&1
  99     else
 100         mkdir -p /run/log
 101         exec > >(tee -i /run/log/stage-2-init.log) 2>&1
 102     fi
 103 fi
 104
 105
 106 # Required by the activation script
 107 install -m 0755 -d /etc
 108 if [ ! -h "/etc/nixos" ]; then
 109     install -m 0755 -d /etc/nixos
 110 fi
 111 install -m 01777 -d /tmp
 112
 113
 114 # Run the script that performs all configuration activation that does
 115 # not have to be done at boot time.
 116 echo "running activation script..."
 117 $systemConfig/activate
 118
 119
 120 # Record the boot configuration.
 121 ln -sfn "$systemConfig" /run/booted-system
 122
 123
 124 # Run any user-specified commands.
 125 @shell@ @postBootCommands@
 126
 127
 128 # No need to restore the stdout/stderr streams we never redirected and
 129 # especially no need to start systemd
 130 if [ "${IN_NIXOS_SYSTEMD_STAGE1:-}" != true ]; then
 131     # Reset the logging file descriptors.
 132     exec 1>&$logOutFd 2>&$logErrFd
 133     exec {logOutFd}>&- {logErrFd}>&-
 134
 135
 136     # Start systemd in a clean environment.
 137     echo "starting systemd..."
 138     exec @systemdExecutable@ "$@"
 139 fi