* Use udevtrigger to create device nodes for all known devices.

* Plug and play: load kernel modules for all supported PCI devices
  automatically.

svn path=/nixu/trunk/; revision=6975

test/boot-stage-2-init.sh

@@ -30,19 +30,20 @@ mkdir -p /nix/var/nix/db
 mkdir -p /nix/var/nix/gcroots
 mkdir -p /nix/var/nix/temproots
 
-# Create device nodes in /dev.
-source @makeDevices@
-
 # Ensure that the module tools can find the kernel modules.
 export MODULE_DIR=@kernel@/lib/modules/
 
-# Additional path for the interactive shell.
-for i in @extraPath@; do
-    PATH=$PATH:$i/bin
-    if test -e $i/sbin; then
-        PATH=$PATH:$i/sbin
-    fi
-done
+# Create device nodes in /dev.
+#source @makeDevices@
+
+# Start udev.
+udevd --daemon
+
+# Let udev create device nodes for all modules that have already been
+# loaded into the kernel (or for which support is built into the
+# kernel).
+udevtrigger
+udevsettle # wait for udev to finish
 
 # Start syslogd.
 mkdir -p /var/run
@@ -52,6 +53,12 @@ echo "*.* /dev/tty10" > /etc/syslog.conf
 echo "syslog 514/udp" > /etc/services # required, even if we don't use it
 @sysklogd@/sbin/syslogd &
 
+# Try to load modules for all PCI devices.
+for i in /sys/bus/pci/devices/*/modalias; do
+    echo "Trying to load a module for $(basename $(dirname $i))..."
+    modprobe $(cat $i)
+done
+
 # login/su absolutely need this.
 touch /etc/login.defs 
 
@@ -59,11 +66,6 @@ touch /etc/login.defs
 echo "root::0:0:root:/:@shell@" > /etc/passwd
 echo "root:*:0" > /etc/group
 
-cat > /etc/profile <<EOF
-export PATH=$PATH
-export MODULE_DIR=$MODULE_DIR
-EOF
-
 # Set up inittab.
 for i in $(seq 1 6); do 
     echo "$i:2345:respawn:@mingetty@/sbin/mingetty --noclear tty$i" >> /etc/inittab
@@ -79,6 +81,19 @@ You can log in as \`root'.
 
 EOF
 
+# Additional path for the interactive shell.
+for i in @extraPath@; do
+    PATH=$PATH:$i/bin
+    if test -e $i/sbin; then
+        PATH=$PATH:$i/sbin
+    fi
+done
+
+cat > /etc/profile <<EOF
+export PATH=$PATH
+export MODULE_DIR=$MODULE_DIR
+EOF
+
 # Start an interactive shell.
 #exec @shell@
 

test/boot-stage-2.nix

@@ -1,5 +1,6 @@
-{ genericSubstituter, shell, coreutils
-, utillinux, kernel, sysklogd, mingetty
+{ genericSubstituter, shell, coreutils, findutils
+, utillinux, kernel, sysklogd, mingetty, udev
+, module_init_tools
 , path ? []
 }:
 
@@ -9,7 +10,10 @@ genericSubstituter {
   inherit shell kernel sysklogd mingetty;
   path = [
     coreutils
+    findutils
     utillinux
+    udev
+    module_init_tools
   ];
   extraPath = path;
   makeDevices = ./make-devices.sh;

test/rescue-system.nix

@@ -63,8 +63,8 @@ rec {
   # The init script of boot stage 2, which is supposed to do
   # everything else to bring up the system.
   bootStage2 = import ./boot-stage-2.nix {
-    inherit (pkgs) genericSubstituter coreutils utillinux kernel
-      sysklogd;
+    inherit (pkgs) genericSubstituter coreutils findutils
+      utillinux kernel sysklogd udev module_init_tools;
     shell = pkgs.bash + "/bin/sh";
 
     # Additional stuff; add whatever you want here.
@@ -74,7 +74,6 @@ rec {
       pkgs.cpio
       pkgs.curl
       pkgs.e2fsprogs
-      pkgs.findutils
       pkgs.gnugrep
       pkgs.gnused
       pkgs.gnutar
@@ -82,7 +81,6 @@ rec {
       pkgs.gzip
       pkgs.iputils
       pkgs.less
-      pkgs.module_init_tools
       pkgs.nano
       pkgs.netcat
       pkgs.nettools