Add keepalive scripts

scripts/README.md

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+#ofxPiMapper Scripts
+
+This directory contains useful scripts to be used to autorun and keep alive your projection mapping application.
+
+
+## keepalive-example.sh
+
+This script launches and keeps alive the example application. 
+
+1. Copy it to your home directory.
+   ```
+   cp keepalive-example.sh ~/keepalive-example.sh
+   ```
+2. Set exec permissions.
+   ```
+   chmod a+x keepalive-example.sh
+   ```
+3. Run `crontab -e` and add the following lines to make use of it.
+   ```
+   @reboot /home/pi/keepalive-example.sh
+   * * * * * /home/pi/keepalive-example.sh
+   ```
+
+
+## keepalive-example-camera.sh
+
+This script launches and keeps alive the example-camera application.
+
+1. Copy it to your home directory.
+   ```
+   cp keepalive-example-camera.sh ~/keepalive-example-camera.sh
+   ```
+2. Set exec permissions.
+   ```
+   chmod a+x keepalive-example-camera.sh
+   ```
+3. Run `crontab -e` and add the following lines to make use of it.
+   ```
+   @reboot /home/pi/keepalive-example-camera.sh
+   * * * * * /home/pi/keepalive-example-camera.sh
+   ```

scripts/keepalive-example-camera.sh

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+#!/bin/bash
+
+PROCESS_DIR="/home/pi/openFrameworks/addons/ofxPiMapper/example/bin"
+PROCESS_NAME="example-camera"
+
+case "$(pidof $PROCESS_NAME | wc -w)" in
+
+0)  echo "Restarting $PROCESS_NAME: $(date)" >> "/var/log/$PROCESS_NAME.txt"
+    "$PROCESS_DIR/$PROCESS_NAME" &
+    ;;
+1)  # all ok
+    ;;
+*)  echo "Removed double $PROCESS_NAME: $(date)" >> "/var/log/$PROCESS_NAME.txt"
+    kill $(pidof $PROCESS_NAME | awk '{print $1}')
+    ;;
+esac

scripts/keepalive-example.sh

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+#!/bin/bash
+
+PROCESS_DIR="/home/pi/openFrameworks/addons/ofxPiMapper/example/bin"
+PROCESS_NAME="example"
+
+case "$(pidof $PROCESS_NAME | wc -w)" in
+
+0)  echo "Restarting $PROCESS_NAME: $(date)" >> "/var/log/$PROCESS_NAME.txt"
+    "$PROCESS_DIR/$PROCESS_NAME" &
+    ;;
+1)  # all ok
+    ;;
+*)  echo "Removed double $PROCESS_NAME: $(date)" >> "/var/log/$PROCESS_NAME.txt"
+    kill $(pidof $PROCESS_NAME | awk '{print $1}')
+    ;;
+esac