Function mdb_env_get_fd

pub unsafe extern "C" fn mdb_env_get_fd(
    env: *mut MDB_env,
    fd: *mut mdb_filehandle_t,
) -> c_int

Return the filedescriptor for the given environment.

This function may be called after fork(), so the descriptor can be closed before exec*(). Other LMDB file descriptors have FD_CLOEXEC. (Until LMDB 0.9.18, only the lockfile had that.)

Arguments

• env (direction in) - An environment handle returned by #mdb_env_create()
• fd (direction out) - Address of a mdb_filehandle_t to contain the descriptor.

Returns

A non-zero error value on failure and 0 on success. Some possible errors are:

• EINVAL - an invalid parameter was specified.