#!/bin/sh
 
# Written by Nick Welch <nick@incise.org>.  Author disclaims copyright.
 
mkdir -p /tmp/grabpics &&
cd /tmp/grabpics && \
sudo rm -f * && \
sudo gphoto2 --filename '%:' -P && \
sudo gphoto2 --delete-all-files --folder /store_00010001/DCIM/100CANON && \
sudo chown death:death img_*.jpg && \
chmod 600 img_*.jpg
 
die () { echo "$1"; exit 1; }
sorted_jpegs_in_dir () { find "$1" -mindepth 1 -maxdepth 1 -iname '*.jpg' | sort -n; }
sorted_new_files () { sorted_jpegs_in_dir .; }
first_new_file () { sorted_new_files | head -n1; }
 
lastnum=`basename $(sorted_jpegs_in_dir ~/Pictures/Photos | tail -n1) .jpg | sed -e 's/^0*//'`
newcount=`sorted_new_files | wc -l`
 
test "$newcount" -gt 0 -a "$newcount" -lt 100000 || die "weird number ($newcount) of new files"
test "$lastnum" -gt 0 -a "$lastnum" -lt 100000 || die "weird number ($lastnum) of last file number"
 
for x in `seq $newcount`
do
    mv -v `first_new_file` ~/Pictures/Photos/`printf '%04d' $(( $lastnum + $x ))`.jpg
done