BTW, is there a way to ``lock'' on a raster (or its data at
least), so that it could be opened (or rewound) multiple times
and, e. g., `G_get_raster_row' would return the same data, even
if the raster was, e. g., renamed meanwhile?
It seems to me that the combination of the dup () and lseek ()
(or rather rewind ()?) likes for GRASS rasters would do the
trick. Are such library functions currently there? Does it
seem reasonable to implement them?
I'd like to mention that given the standard Unix-like semantics,
such a locking would imply that one could read a raster that was
`g.remove'd meanwhile. I think it's a nice feature for
long-running GRASS modules, having to read certain rasters
multiple times per run.
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