A more friendly stage1, with interactive bash, busybox plenty of tools, etc.

I set it as default because users can benefit of this without having to prepare
their nixos first, and I don't think it will break any nixos for the initrd
size increase.

It can be disabled with 'boot.initrd.withExtraTools = false'.


svn path=/nixos/trunk/; revision=33000

modules/module-list.nix

@@ -190,6 +190,7 @@
   ./system/boot/luksroot.nix
   ./system/boot/modprobe.nix
   ./system/boot/stage-1.nix
+  ./system/boot/stage-1-extratools.nix
   ./system/boot/stage-2.nix
   ./system/etc/etc.nix
   ./system/upstart-events/control-alt-delete.nix

modules/system/boot/stage-1-extratools.nix

@@ -0,0 +1,56 @@
+{ config, pkgs, ...}:
+
+with pkgs.lib;
+
+let
+  staticBusybox = pkgs.busybox.override {
+    enableStatic = true;
+  };
+in
+{
+
+  ###### interface
+
+  options = {
+    boot.initrd.withExtraTools = mkOption {
+      default = true;
+      type = with types; bool;
+      description = ''
+        Have busybox utils in initrd, and an interactive bash.
+      '';
+    };
+  };
+
+  config = {
+    boot.initrd.extraUtilsCommands = mkIf config.boot.initrd.withExtraTools ''
+
+      set -x
+      cp -pv ${pkgs.ncurses}/lib/libncurses*.so.* $out/lib
+      cp -pv ${pkgs.readline}/lib/libreadline.so.* $out/lib
+      cp -pv ${pkgs.readline}/lib/libhistory.so.* $out/lib
+      rm $out/bin/bash
+      cp -pv ${pkgs.bashInteractive}/bin/bash $out/bin
+
+      cp -pv ${staticBusybox}/bin/busybox $out/bin
+      shopt -s nullglob
+      for d in bin sbin; do
+        pushd ${staticBusybox}/$d
+        # busybox has these, but we'll put them later
+        GLOBIGNORE=.:..:mke2fs:ip:modprobe
+        for a in *; do
+          if [ ! -e $out/bin/$a ]; then
+            ln -sf busybox $out/bin/$a
+          fi
+        done
+        popd
+      done
+      shopt -u nullglob
+      unset GLOBIGNORE
+    '';
+
+    boot.initrd.extraUtilsCommandsTest = mkIf config.boot.initrd.withExtraTools ''
+      $out/bin/busybox
+    '';
+  };
+
+}

modules/system/boot/stage-1-init.sh

@@ -25,12 +25,23 @@ EOF
 
     read reply
 
+    # Get the console from the kernel cmdline
+    console=tty1
+    for o in $(cat /proc/cmdline); do
+      case $o in
+        console=*)
+          set -- $(IFS==; echo $o)
+          console=$2
+          ;;
+      esac
+    done
+
     case $reply in
         f)
-            exec @shell@;;
+            exec setsid @shell@ < /dev/$console >/dev/$console 2>/dev/$console ;;
         i)
             echo "Starting interactive shell..."
-            @shell@ || fail
+            setsid @shell@ < /dev/$console >/dev/$console 2>/dev/$console || fail
             ;;
         *)
             echo "Continuing...";;
@@ -57,6 +68,11 @@ mount -t tmpfs -o "mode=0755,size=@devSize@" none /dev
 mkdir -p /run
 mount -t tmpfs -o "mode=0755,size=@runSize@" none /run
 
+# Some console devices, for the interactivity
+mknod /dev/console c 5 1
+mknod /dev/tty1 c 4 1
+mknod /dev/ttyS0 c 4 64
+mknod /dev/ttyS1 c 4 65
 
 # Process the kernel command line.
 export stage2Init=/init

modules/system/boot/stage-1.nix

@@ -139,7 +139,7 @@ let
       # Copy some utillinux stuff.
       cp -v ${pkgs.utillinux}/bin/mount ${pkgs.utillinux}/bin/umount \
          ${pkgs.utillinux}/sbin/fsck ${pkgs.utillinux}/sbin/switch_root \
-         ${pkgs.utillinux}/sbin/blkid $out/bin
+         ${pkgs.utillinux}/sbin/blkid ${pkgs.utillinux}/bin/setsid $out/bin
       cp -pdv ${pkgs.utillinux}/lib/libblkid*.so.* $out/lib
       cp -pdv ${pkgs.utillinux}/lib/libuuid*.so.* $out/lib
 

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

@@ -46,6 +46,9 @@ if [ ! -e /proc/1 ]; then
     mknod -m 0666 /dev/null c 1 3
     mknod -m 0644 /dev/urandom c 1 9 # needed for passwd
     mknod -m 0644 /dev/console c 5 1
+    mknod -m 0644 /dev/tty1 c 4 1
+    mknod -m 0644 /dev/ttyS0 c 4 64
+    mknod -m 0644 /dev/ttyS1 c 4 65
 fi