Brother scantofile script mod to generate pdf from brscan-skey

gistfile1.txt

#! /bin/sh
#
#   $1 = scanner device
#   $2 = friendly name
#    100,200,300,400,600
# 200 is a little more than half the size but still readable.
resolution=300
device=$1
device='brother4:net1;dev0'
#BASE= /home/glamke/brscan
sleep  1
output_tmp=/home/glamke/brscan/"`date +%Y%m%d_%H%M%S`"
echo "scan from $2($device)"
# This is introduced to kill scanadf if the button on the scanner isn't pressed.
# It has a timeout of 5 min before killing scanadf.
# testing without this
#nohup /opt/brother/scanner/brscan-skey/script/kill_scan_adf.sh > /dev/null 2>&1 &
# hangs on single page if putton not pushed. with below. 
# nohup with tailing & didn't work. so back to kill script.
#
#scanadf  --script-wait --mode '24bit Color[Fast]' --resolution 300 -y 270 -o "$output_tmp"_%04d".pnm" 
# 20190220 Working very well with timeout command below.  
timeout 5m scanadf  -v --script-wait --mode '24bit Color[Fast]' --resolution 300 -y 270 -o "$output_tmp"_%04d".pnm" 
for pnmfile in $(ls "$output_tmp"*)
do
   echo pnmtops "$pnmfile"  "$pnmfile".ps
#   pnmtops -imagewidth=8.5 -width=8.5 "$pnmfile"  > "$pnmfile".ps
    pnmtops  "$pnmfile"  > "$pnmfile".ps  
   rm -f "$pnmfile"
done
echo psmerge -o"$output_tmp".ps  $(ls "$output_tmp"*.ps)
psmerge -o"$output_tmp".ps  $(ls "$output_tmp"*.ps)

echo "Converting ""$output_tmp".ps "$output_tmp"_CLR.pdf
ps2pdf  "$output_tmp".ps   "$output_tmp"_CLR.pdf
# Convert same PS to greyscale and then to pdf
#gs \
#   -sDEVICE=pdfwrite \
#   -sProcessColorModel=DeviceGray \
#   -sColorConversionStrategy=Gray \
#   -dOverrideICC \
#   -o "$output_tmp"_GS.pdf \
#   -f "$output_tmp"_CLR.pdf

# Failed options
# ps2pdf  "$output_tmp"_GS.ps   "$output_tmp"_GS.pdf
# ps2pdf -dUseFlateCompression=true does nothing since it is a scanned image
# pdfcrop  "$output_tmp".pdf "$output_tmp"_crop.pdf #not needed after adjusting adf size above


#cleanup
for psfile in $(ls "$output_tmp"*.ps)
do
   rm $psfile
done
rm -f "$pnmfile".ps