1 files changed, 79 insertions, 0 deletions
diff --git a/scripts/change_fan.sh b/scripts/change_fan.sh
new file mode 100755
index 0000000..b290700
--- /dev/null
+++ b/scripts/change_fan.sh
@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+## It would be nice to check the system and dynamically figure out which fan controller
+## is being used...but I don't need that right now.
+
+# echo "1" > /sys/devices/platform/applesmc.768/fan1_manual
+# echo "9000" > /sys/devices/platform/applesmc.768/fan1_output
+# cat /sys/devices/platform/applesmc.768/fan1_output
+
+FAN_DIR=/sys/devices/platform/applesmc.768
+FAN_OUT=$FAN_DIR/fan1_output
+FAN_MANUAL=$FAN_DIR/fan1_manual
+MAX_FAN=$(cat $FAN_DIR/fan1_max)
+MIN_FAN=$(cat $FAN_DIR/fan1_min)
+
+function toggle_mbpfan() {
+    SHOULD_DEACTIVE=$1
+    IS_ACTIVE=$(systemctl is-active mbpfan)
+    if [[ "$SHOULD_DEACTIVE" == "false" ]]; then
+        echo "force deactive!"
+        echo "0" > "$FAN_MANUAL"
+        sudo systemctl start mbpfan
+        return
+    elif [[ "$IS_ACTIVE" == "active" || "$SHOULD_DEACTIVE" == "true" ]]; then
+        sudo systemctl stop mbpfan
+        echo "force active!"
+        echo "1" > "$FAN_MANUAL"
+        return
+    else
+	echo "force deactive and start mbpfan"
+        echo "there!"
+        echo "0" > "$FAN_MANUAL"
+        sudo systemctl start mbpfan
+        return
+    fi
+}
+
+function increase_fan() {
+    CURR_SPEED=$(cat $FAN_DIR/fan1_output)
+    NEXT_SPEED=$(echo - | awk -v curr="$CURR_SPEED" '{printf "%1.0f", (curr + 500)}')
+
+    # deactivate mbpfan
+    toggle_mbpfan "true"
+
+    if [[ $NEXT_SPEED -lt $MAX_FAN ]]; then
+        echo $NEXT_SPEED > "$FAN_OUT"
+    else
+        echo $MAX_FAN > "$FAN_OUT"
+    fi
+}
+
+function decrease_fan() {
+    CURR_SPEED=$(cat $FAN_DIR/fan1_output)
+    NEXT_SPEED=$(echo - | awk -v curr="$CURR_SPEED" '{printf "%1.0f", (curr - 500)}')
+
+    # deactivate mbpfan
+    toggle_mbpfan "true"
+
+    if [[ $NEXT_SPEED -gt $MIN_FAN ]]; then
+        echo $NEXT_SPEED > "$FAN_OUT"
+    else
+        # no reason to ever this low.
+        # let the system take back over, since the user probably forgot
+        toggle_mbpfan "false"
+    fi
+}
+
+while getopts ":idt" opt; do
+    case ${opt} in
+        t) toggle_mbpfan
+        ;;
+        i) increase_fan
+        ;;
+        d) decrease_fan
+        ;;
+        \? )
+        ;;
+    esac
+done