SYNOPSIS
#include <tdb.h>
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
DESCRIPTION
Test to see if a key exists. tdb is a pointer returned by tdb_open and key is a lump of data that is used as the index into the database. The TDB_DATA structure is defined as:
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typedef struct { char *dptr; size_t dsize; } TDB_DATA;