dopen - open RMSfile
#include
DFILE *dopen (filename, mode)
char *filename;
char *mode;
Dopen opens the RMSfile named filename for future I/O. Dopen returns
a
pointer to a control block to identify the RMSfile in subsequent
operations.
Filename is the pathname of the RMSfile to open.
Mode is a character string that states the types of operations to
be
done on the RMSfile. Mode may have one of the following values:
Modes Operations
"r" open for reading
"w" zero RMSfile records, open for writing
"a" open for writing
"u" open for both reading and writing
SEE ALSO
dlopen(C-3), dclose(C-3)
Chapter 4, RMS Programming Guide
Dopen returns the pointer NULL if filename cannot be accessed.