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This page displays the COHERENT manpage for gdbm_exists() [Check whether a GDBM data base contains a given record].
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gdbm_exists() -- GDBM Function (libgdbm) Check whether a GDBM data base contains a given record #include <gdbm.h> int gdbm_exists(database, key) GDBM_FILE database; datum key; Function gdbm_exists() checks whether the GDBM data base to which database points contains a record with the key to which key points. database must have been returned by a call to gdbm_open(). If database contains key, gdbm_exists() returns a value other than zero; otherwise, it returns zero. See Also Notes For a statement of copyright and permissions on this routine, see the Lexicon entry for libgdbm.