Introduce mount handlers

Instead of having special NFS code in /init, make it possible for a hook to register a mount handler
When a hook sets the mount_handler environment variable, the normal mount code will be skipped and
the handler will be called with the path to mount point as the first and only argument.

1 files changed, 14 insertions, 0 deletions

diff --git a/hooks/net b/hooks/net
index ff33955..d2085c7 100644
--- a/hooks/net
+++ b/hooks/net
@@ -80,6 +80,20 @@ run_hook ()
             rootfstype="nfs"
 
             echo "NFS-Mount: ${nfs_server}:${nfs_path}"
+
+            # set mount handler for NFS
+            mount_handler="nfs_mount_handler"
         fi
     fi
 }
+
+nfs_mount_handler() {
+    if [ -z "$nfs_server" -o -z "$nfs_path" ]; then
+        err "Unable to mount root filesystem over NFS: wrong parameters."
+        echo "You are being dropped to a recovery shell"
+        echo "    Type 'exit' to try and continue booting"
+        launch_interactive_shell
+        msg "Trying to continue (this will most likely fail) ..."
+    fi
+    nfsmount ${nfs_option:+-o ${nfs_option}} "${nfs_server}:${nfs_path}" "$1"
+}