scan.script

#!/bin/bash
# Thanks to Andreas Gohr (http://www.splitbrain.org/) for the initial work
# https://github.com/splitbrain/paper-backup/
export LANGUAGE="eng"
export HOME=/service/scan-button
export TMPDIR=$HOME/work
FILE_NAME=scan_$(date +%Y%m%d-%H%M%S)
OUT_DIR=/service/scan-processor/work/

# Extra insurance against folder collisions
TEMPLATE="tmp.$(tr -dc '0-9A-Za-z' < /dev/urandom | head -c 12).XXXXXX"
WORK=$(/bin/mktemp -d -t "${TEMPLATE}")
cd $WORK

echo 'Scanning...'
scanimage \
    -d "$SCANBD_DEVICE" \
    --batch="$WORK/$FILE_NAME-%03d.pnm" \
    --resolution 300 \
    --source 'ADF Duplex' \
    --format pnm \
    --mode Color \
    && echo 'Scan complete.'

cd $TMPDIR

# Submit the scan for processing, unless there are no image files
if ls "$WORK" | egrep -q pnm; then
    mv $WORK $OUT_DIR \
        && echo "Scan saved in $OUT_DIR$(basename $WORK)/$FILE_NAME-*.pnm"
fi