register char device and prepare mknod script

1 files changed, 24 insertions, 0 deletions

diff --git a/load.sh b/load.sh
new file mode 100755
index 0000000..41266bc
--- /dev/null
+++ b/load.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+MODULE=hello
+DEVICE=skull
+MODE=664
+
+# invoke insmod with all arguments and use a pathname
+# as newer modutils don't look into . by default
+/usr/bin/insmod ./${MODULE}.ko $* || exit 1
+
+# remove stale nodes
+rm -f /dev/${DEVICE}[0]
+
+MAJOR=$(awk "\$2 == \"$DEVICE\" {print \$1}" /proc/devices)
+
+mknod /dev/${DEVICE}0 c $MAJOR 0
+
+# give appriopriate permissions
+GROUP=staff
+grep -q '^staff' /etc/group || GROUP=wheel
+
+chgrp $GROUP /dev/${DEVICE}0
+chmod $MODE  /dev/${DEVICE}0
+