[Bug-tar] [PATCH] --show-snapshot-field-ranges option

[Nathan Stratton Treadway]

On Sat, Dec 22, 2012 at 20:43:16 -0800, Paul Eggert wrote:
> * src/incremen.c (read_incr_db_01, write_directory_file_entry):
> Allow negative time_t, dev_t, and ino_t.

As I tried to investigate the original "Unexpected field value in
snapshot file" error that eventually let to Paul's patch, I found that
it is rather difficult to figure out exactly what field ranges are
considered valid by a particular GNU tar binary on a particular system.

The attached patch attempts to solve that problem by adding a
--show-snapshot-field-ranges option, which simply prints to standard out
the compiled-in minimum and maximum allowed values for each field.              

                                                Nathan


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show-snapshot-field-ranges.patch
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