#! /bin/bash
function usage {
  echo "usage: $0 -ms path_of_file"
  echo "  -m to remove useless exif entries"
  echo "  -s to show current exif entries"
  exit -1
}
if [ $# != 2 ]; then
  usage
fi
OP=$1
SRC=$2
if [ ! -f $SRC ]; then
  echo "error: file not found"
  exit -2
fi
if [ $OP = "-m" ]; then
  cp "$SRC" "$SRC"."_tmp"
  exiftool -all= "$SRC"
  exiftool -overwrite_original
      -TagsFromFile "$SRC"."_tmp"
      -ExposureTime
      -FNumber
      -ExposureProgram
      -ISO
      -DateTimeOriginal
      -CreateDate
      -ExposureCompensation
      -MaxApertureValue
      -MeteringMode
      -LightSource
      -Flash
      -FocalLength
      -SubSecTime
      -SubSecTimeOriginal
      -SubSecTimeDigitized
      -ColorSpace
      -ExifImageWidth
      -ExifImageHeight
      -SensingMethod
      -CustomRendered
      -ExposureMode
      -WhiteBalance
      -DigitalZoomRatio
      -FocalLengthIn35mmFormat
      -SceneCaptureType
      -GainControl
      -Contrast
      -Saturation
      -Sharpness
      -SubjectDistanceRange
      -GPSVersionID
      -GPSLatitudeRef
      -GPSLatitude
      -GPSLongitudeRef
      -GPSLongitude
      -Make
      -Model
    "$SRC"
  exiftool -delete_original! "$SRC"
  rm -f "$SRC"."_tmp"
else
  if [ $OP = "-s" ]; then
    exiftool "$SRC"
  else
    usage
  fi
fi