NAME

       tdb_chainlock - lock a group of keys tdb_chainunlock - unlock a previously locked group of
       keys

SYNOPSIS

       #include <tdb.h>

       int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key);
       void tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key);

DESCRIPTION

       tdb_chainlock is a low-level function used to lock a particular key (and a number of other
       keys)  without  any  checking:  any  other process attempting to perform tdb operations on
       those keys will block until tdb_chainunlock is called.

NOTES

       It is the user's responsibility to ensure that they do not  deadlock  the  database  using
       these functions: something which is impossible using the other access functions.

RETURN VALUE

       A return value of 0 indicates success and -1 indicates failure.

AUTHORS

       Software: Andrew Tridgell <tridge@linuxcare.com> Man page: Rusty.

SEE ALSO

       gdbm(3), tdb(3), tdb_lockall(3).