1 files changed, 59 insertions, 0 deletions
diff --git a/pkgs/build-support/vm/rpm/run-in-uml-boot.sh b/pkgs/build-support/vm/rpm/run-in-uml-boot.sh
new file mode 100644
index 000000000000..46c15331305e
--- /dev/null
+++ b/pkgs/build-support/vm/rpm/run-in-uml-boot.sh
@@ -0,0 +1,59 @@
+set -e
+set -x
+
+# Restore the original variables.
+export NIX_BUILD_TOP=$1
+. $NIX_BUILD_TOP/initial-env-vars
+
+export PATH=$(< $NIX_BUILD_TOP/path)
+
+export NIX_STORE=/nix/store # !!! assuming that Nix store = /nix/store
+
+cd $NIX_BUILD_TOP
+
+root=$NIX_BUILD_TOP/root
+
+echo "remounting / writeable..."
+mount -n -o remount,rw dummy /
+
+exec > log 2>&1
+
+echo "creating /dev..."
+mount -n -t tmpfs none /dev
+mknod /dev/ubd0 b 98 0
+
+echo "mounting image on $root..."
+mkdir root
+mount -n -t ext2 /dev/ubd0 $root
+
+echo "switching roots"
+mkdir $root/hostfs
+
+# Make the Nix store available in the UML file system as a symlink to /hostfs/$NIX_STORE.
+mkdir -p $root/$(dirname $NIX_STORE)
+ln -s /hostfs/$NIX_STORE $root/$NIX_STORE 
+
+$utillinux/sbin/pivot_root $root $root/hostfs
+cd /
+# !!! we should also chroot here (according to the pivot_root manpage)
+
+echo "mounting /proc..."
+mount -n -t proc none /proc
+
+#mount --bind /hostfs/tmp /tmp
+
+cd /tmp
+export TMPDIR=/tmp
+export TMP_DIR=/tmp
+#cd $NIX_BUILD_TOP
+
+# Call the actual builder.
+if sh -e $actualBuilder; then
+    touch /hostfs/$NIX_BUILD_TOP/success
+fi
+
+echo "syncing..."
+sync
+
+echo "halting..."
+$sysvinit/sbin/halt -d -f