ogrinfo detecting geojson

ogr_test.sh

$ ogrinfo --version
GDAL 1.8.1, released 2011/07/09

# create a normal json file with an ext
$ echo '{ "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": {"type": "Point", "coordinates": [102.0, 0.5]}, "properties": {"prop0": "value0"} } ]}' > file.json

# this works as expected
$ ogrinfo file.json 
ERROR 4: GeoJSON Driver doesn't support update.
Had to open data source read-only.
INFO: Open of `file.json'
      using driver `GeoJSON' successful.
1: OGRGeoJSON (Point)

# create a json file with no extension
$ echo '{ "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": {"type": "Point", "coordinates": [102.0, 0.5]}, "properties": {"prop0": "value0"} } ]}' > filejson

$ head -n 1 filejson 
{ "type": "FeatureCollection", "features": [ { "type": "Feature", "geometry": {"type": "Point", "coordinates": [102.0, 0.5]}, "properties": {"prop0": "value0"} } ]}

# this does not work
# this http://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogrsf_frmts/geojson/ogrgeojsonutils.cpp#L39 must not be being called for some reason so '{' is not detected

$ ogrinfo filejson
FAILURE:
Unable to open datasource `filejson' with the following drivers.
  -> ESRI Shapefile
  -> MapInfo File
  -> UK .NTF
  -> SDTS
  -> TIGER
  -> S57
  -> DGN
  -> VRT
  -> REC
  -> Memory
  -> BNA
  -> CSV
  -> NAS
  -> GML
  -> GPX
  -> LIBKML
  -> KML
  -> GeoJSON
  -> Interlis 1
  -> Interlis 2
  -> GMT
  -> SQLite
  -> DODS
  -> ODBC
  -> PGeo
  -> MSSQLSpatial
  -> OGDI
  -> PostgreSQL
  -> MySQL
  -> PCIDSK
  -> XPlane
  -> AVCBin
  -> AVCE00
  -> DXF
  -> Geoconcept
  -> GeoRSS
  -> GPSTrackMaker
  -> VFK
  -> PGDump
  -> GPSBabel
  -> SUA
  -> OpenAir
  -> PDS
  -> WFS
  -> HTF
  -> AeronavFAA