Add support for custom shell script on boot.

README.md

@@ -90,6 +90,10 @@ To start services immediately, in Archbox, do :
 ```
 sudo archboxctl exec <Service name>
 ```
+
+##### Custom command on boot
+You can create a shell script located at ```/etc/archbox.rc``` and ```archboxinit``` will execute it in Archbox on boot.
+
 #### Desktop entries
 Use ```archbox-desktop``` to install desktop entries in chroot to host (installed to ```~/.local/share/applications/archbox```)
 #### Lauching apps via rofi

archboxinit.bash

@@ -48,6 +48,12 @@ case $1 in
                 chroot $CHROOT /bin/su -c "/usr/local/bin/archboxctl exec $j" > /dev/null 2>&1 &
             fi
         done
+        if [[ -e /etc/archbox.rc ]]; then
+            cp /etc/archbox.rc /tmp/archbox.rc
+            chmod +x /tmp/archbox.rc
+            chroot $CHROOT /bin/su -c '/tmp/archbox.rc' > /tmp/archbox.rc.log 2>&1
+            rm /tmp/archbox.rc
+        fi
         exit 0
     ;;
     stop)