dupdate - update current record
#include
rno_t dupdate (buffer, fcb)
char *buffer;
DFILE *fcb;
Dupdate changes the data of the current record in an opened
RMSfile. The key and data of the record to change must be in
buffer prior to calling dupdate. Although the key is required to
be in buffer, primary key changes are not allowed. If the RMSfile
contains secondary keys, the index key values are updated at the
time of the call to dupdate.
Fcb is the file block pointer returned by dlopen(C-3)
or
dopen(C-3).
The returned record numbers may be saved and used on a subsequent
call to dread(C-3). The contents of
buffer remain unchanged.
dlopen(C-3), dopen(C-3),
dread(C-3)
Chapter 4, RMS Programming Guide
DIAGNOSTICS
A value of BAD (-1) is returned if there is an I/O error, if an
attempt is made to change the key or if the current record has
not been defined at the time of the call to dupdate.