NAME
dopen - open RMSfileSYNOPSIS
#includeDFILE *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.