* Use sysvinit's init to start the system. This has the happy

side-effect of initialising the console properly (i.e., enabling
  Ctrl-[C, Z]).

svn path=/nixu/trunk/; revision=801

fill-disk.sh

@@ -1,6 +1,7 @@
 #! /bin/sh -e
 
-initExpr=$1
+sysvinitPath=$1
+initPath=$2
 
 make_dir() {
     mode=$1
@@ -18,6 +19,8 @@ mount -t ext2 /dev/discs/disc0/disc $root
 make_dir 00755 /dev
 make_dir 00755 /proc
 make_dir 01777 /tmp
+make_dir 00755 /etc # global non-constant configuration
+make_dir 00755 /var
 make_dir 00755 /nix
 make_dir 00755 /nix/store
 make_dir 00755 /nix/var
@@ -25,6 +28,13 @@ make_dir 00755 /nix/var/nix
 make_dir 00755 /nix/var/nix/db
 make_dir 00755 /nix/var/log
 make_dir 00755 /nix/var/log/nix
+make_dir 00755 /mnt
+make_dir 00755 /mnt/host
+make_dir 00755 /home
+make_dir 00755 /home/root
+
+rm -f $root/etc/mtab
+ln -s /proc/mounts $root/etc/mtab
 
 export NIX_ROOT=$root
 
@@ -50,9 +60,13 @@ echo registering successors...
 done) < /tmp/successors
 
 echo setting init symlink...
-initPath=$(/nix/bin/nix-store -qn $initExpr)
 rm -f $root/init
-ln -s $initPath/bin/init $root/init
+ln -s $sysvinitPath/sbin/init $root/init
+
+echo setting up inittab...
+rm -f $root/etc/inittab
+echo "id:2:initdefault:" >> $root/etc/inittab
+echo "si::bootwait:$initPath/bin/init" >> $root/etc/inittab
 
 echo unmounting...
 umount $root

init/builder.sh

@@ -9,6 +9,10 @@ sed \
     -e "s^@bash\@^$bash^g" \
     -e "s^@coreutils\@^$coreutils^g" \
     -e "s^@findutils\@^$findutils^g" \
+    -e "s^@utillinux\@^$utillinux^g" \
+    -e "s^@sysvinit\@^$sysvinit^g" \
+    -e "s^@e2fsprogs\@^$e2fsprogs^g" \
+    -e "s^@nix\@^$nix^g" \
     < $src > $out/bin/init
 
 chmod +x $out/bin/init

init/default.nix

@@ -1,9 +1,9 @@
-{stdenv, bash, coreutils, findutils}:
+{stdenv, bash, coreutils, findutils, utillinux, sysvinit, e2fsprogs, nix}:
 
 derivation {
   name = "init";
   system = stdenv.system;
   builder = ./builder.sh;
   src = ./init.sh;
-  inherit stdenv bash coreutils findutils;
+  inherit stdenv bash coreutils findutils utillinux sysvinit e2fsprogs nix;
 }

init/init.sh

@@ -1,14 +1,33 @@
 #! @bash@/bin/sh -e
 
-export PATH=@bash@/bin:@coreutils@/bin:@findutils@/bin
+trap "echo 'ignoring TERM signal'" SIGTERM
+trap "echo 'ignoring INT signal'" SIGINT
+
+export PATH=@nix@/bin:@bash@/bin:@coreutils@/bin:@findutils@/bin:@utillinux@/bin:@utillinux@/sbin:@sysvinit@/bin:@sysvinit@/sbin:@e2fsprogs@/bin:@e2fsprogs@/sbin
 
 echo "--- Nix ---"
 
-#echo "remounting root..."
+echo "mounting /proc..."
+mount -n -t proc none /proc
+
+echo "checking /dev/root..."
+e2fsck -y /dev/root || test "$?" -le 1
+
+echo "remounting / writable..."
+mount -n -o remount,rw /dev/root /
+
+echo "mounting /mnt/host..."
+mount -n -t hostfs none /mnt/host
 
 echo "starting root shell..."
 
 @bash@/bin/sh
 
+echo "remounting / read-only..."
+mount -n -o remount,rw /dev/root / || echo "(failed)" # ignore errors
+
+echo "syncing..."
+sync || echo "(failed)" # ignore errors
+
 echo "shutting down..."
-exit 0
+halt -d -f

make-disk.sh

@@ -2,7 +2,7 @@
 
 image=/tmp/disk.img
 size=$(expr 256 \* 1024 \* 1024)
-storepaths=/tmp/storepaths
+storePaths=/tmp/storepaths
 successors=/tmp/successors
 
 if ! test -f $image; then 
@@ -16,19 +16,24 @@ if ! test -f $image; then
 
 fi
 
-
 # What to copy?
-storeexpr=$(echo '(import ./pkgs.nix).init' | nix-instantiate -)
+storeExpr=$(echo '(import ./pkgs.nix).everything' | nix-instantiate -)
-nix-store -rB $storeexpr
+nix-store -rB $storeExpr
-nix-store -qn --requisites $storeexpr > $storepaths
+nix-store -qn --requisites $storeExpr > $storePaths
 
 (while read storepath; do
   nix-store -q --predecessors $storepath | (while read predecessor; do
     echo $predecessor $storepath
   done) 
-done) < $storepaths > $successors
+done) < $storePaths > $successors
+
+# Location of sysvinit?
+sysvinitPath=$(nix-store -qn $(echo '(import ./pkgs.nix).sysvinit' | nix-instantiate -))
+
+# Location of Nix init?
+initPath=$(nix-store -qn $(echo '(import ./pkgs.nix).init' | nix-instantiate -))
 
 # Fill the disk with the minimal Nix store.
 if ! test -d /tmp/mnt; then mkdir /tmp/mnt; fi
-linux ubd0=$image root=/dev/root rootflags=/ rootfstype=hostfs init="$(pwd)/fill-disk.sh $storeexpr"
+linux ubd0=$image root=/dev/root rootflags=/ rootfstype=hostfs \
-
+  init="$(pwd)/fill-disk.sh $sysvinitPath $initPath"

pkgs.nix

@@ -1,4 +1,9 @@
 rec {
-  inherit (import pkgs/system/i686-linux.nix) stdenv bash coreutils findutils;
+  inherit (import pkgs/system/i686-linux.nix)
-  init = (import ./init) {inherit stdenv bash coreutils findutils;};
+    stdenv bash coreutils findutils utillinux sysvinit e2fsprogs nix;
+
+  init = (import ./init)
+    {inherit stdenv bash coreutils findutils utillinux sysvinit e2fsprogs nix;};
+
+  everything = [init sysvinit];
 }