raspi-cam time lapse

autorun.sh

if usbkey mounted then watch raspistill

autorunonce.sh

#!/bin/bash

set_config_var() {
  lua - "$1" "$2" "$3" <<EOF > "$3.bak"
local key=assert(arg[1])
local value=assert(arg[2])
local fn=assert(arg[3])
local file=assert(io.open(fn))
local made_change=false
for line in file:lines() do
  if line:match("^#?%s*"..key.."=.*$") then
    line=key.."="..value
    made_change=true
  end
  print(line)
end

#enable raspi-cam
set_config_var start_x 1 /boot/config.txt
CUR_GPU_MEM=$(get_config_var gpu_mem /boot/config.txt)
if [ -z "$CUR_GPU_MEM" ] || [ "$CUR_GPU_MEM" -lt 128 ]; then
  set_config_var gpu_mem 128 /boot/config.txt
fi
sed /boot/config.txt -i -e "s/^startx/#startx/"
sed /boot/config.txt -i -e "s/^fixup_file/#fixup_file/