The following function should be used very seldom.
ret = gdbm_reorganize(dbf);
The parameter is:
The pointer returned by `gdbm_open'.
If you have had a lot of deletions and would like to shrink the space
used by the `gdbm' file, this function will reorganize the database.
`gdbm' will not shorten the length of a `gdbm' file (deleted file space
will be reused) except by using this reorganization.
This reorganization requires creating a new file and inserting all
the elements in the old file `dbf' into the new file. The new file is
then renamed to the same name as the old file and `dbf' is updated to
contain all the correct information about the new file. If an error is
detected, the return value is negative. The value zero is returned
after a successful reorganization.
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