dfindnm - find next matching record using secondary index
rno_t dfindnm(buffer, fcb)
Dfindnm searches for duplicate secondary keys. Before calling dfindnm, call dseti(C-3) to select the desired secondary index. Call dfindm(C-3) to find the first key value in the secondary index. Each subsequent call to dfindnm returns the next record in secondary key order whose keys match the record returned by dfindm(C-3). If dnumidx(C-3) has been called prior to this function, only the first n fields of the current index are compared; otherwise, all fields of the current index are compared. The beginning contents of buffer are ignored by dfindnm.
Dfindnm maintains the current position in the secondary index, so additional records may be fetched in secondary key order by calling the dfindnm function repeatedly.
Fcb is the file block pointer returned by dlopen(C-3) or dopen(C-3).
The returned record number may be saved and used on a subsequent call to dread(C-3).
dlopen(C-3), dopen(C-3), dseti(C-3), dfindm(C-3), dread(C-3),
RMS Programming Guide
Dfindnm returns a value of BAD (-1) if an I/O error occurred or if there is no record that contains field values equal to the last values returned. If no record is found, the contents of buffer are undefined.