#include "btree.h"
int btupd(BTA* btact, char* key, char* data, int dsize);
The btupd function updates the data
record of an existing key in the file associated with the
btact context pointer. Both
key and data are
character pointers. Since the data may legitimately contain
null (x'00) characters, the length of the data, in bytes, must
be passed in dsize. If the replacement
data is successfully stored in the B Tree file,
btupd returns zero.
A non-zero return from btupd indicates an
error occurred.