Крутая программа

cat /sys/class/i2c-adapter/i2c-3/3-001d/coord | cut -d' ' -f3`

gst-launch v4l2camsrc device=/dev/video1 num-buffers=1 ! dspjpegenc ! filesink location=photo.jpg

#!/bin/sh

[ -f /usr/bin/gst-launch ] || \
{ echo "This script requires gstreamer-tools package. Run 'apt-get install gstreamer-tools' as root"; exit 1; }

IMAGES_DIR=/home/user/MyDocs/.images/

# Make shot from front camera
# Change to /dev/video0 to get photo from back camera
# Photos will be named by date
take_photo()
{
        gst-launch v4l2camsrc device=/dev/video1 num-buffers=1 ! dspjpegenc ! filesink location=$IMAGES_DIR/front_alarm_`date +%Y%m%d_%H%M%S`.jpg
}

# Read accelerometer data and extract Z-coordinate 
get_zcoord()
{
        ZCOORD=`cat /sys/class/i2c-adapter/i2c-3/3-001d/coord | cut -d' ' -f3`;
        ZVAL=`expr $ZCOORD / 18`;
}

# Check if phone is lies on the table
# Both upside and downside variants
is_lying()
{
        IS_LYING="0"
        get_zcoord
        VAL_DOWN=`expr $ZVAL + 56`
        VAL_UP=`expr $ZVAL - 56`
        [[ "$VAL_DOWN" -ge "0" -a "$VAL_DOWN" -le "3" -o \
           "$VAL_UP" -ge "0" -a "$VAL_UP" -le "3" ]] && \
                IS_LYING="1"
}

wait_for_lie()
{
        echo "Waiting for the phone to be put down... "
        while [ "$IS_LYING" -eq "0" ]; do
                is_lying
                sleep 1
        done
}

# Initially we should start only after phone will be put down
wait_for_lie

echo "Ok, phone is on the table. Start watching..."

while true; do
        is_lying
        [[ "$IS_LYING" -eq "1" ]] && { sleep 1; continue; }

        # Got alarm
        echo "Alarm! Waiting 2 secs and taking 3 photos into /home/user/MyDocs/.images/"
        sleep 2
        for i in `seq 1 3`; do
                take_photo
                sleep 1
        done

        wait_for_lie
        sleep 2 # just to make accelerometer happy after putting down

        echo "Waiting for the next alarm..."
done

exit 0