NAME
dopen - open RMSfile
SYNOPSIS
#include <cbase/dirio.h>
DFILE *dopen (filename, mode)
char *filename;
char *mode;
DESCRIPTION
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
DIAGNOSTICS
Dopen returns the pointer NULL if filename cannot be accessed.