Basic Characteristics RAPID

Open Opens a file or serial channel
Example
Arguments
Open is used to open a file or serial channel for reading or writing.
VAR iodev logfile;
.
Open "flp1:LOGDIR" \File:= "LOGFILE1.DOC",logfile;
The file LOGFILE1.DOC in unit flp1: (diskette), directory LOGDIR, is opened
for writing. The reference name logfile is used later in the program when writing
to the file.
Open Object [\File] IODevice [\Read] | [\Write] | [\Append] | [\Bin]
Object Data type: string
The I/O object that is to be opened, e.g. "flp1:", "ram1disk:".
[\File] Data type: string
The name of the file. This name can also be specified in the argument Object,
e.g. "flp1:LOGDIR/LOGFILE.DOC".
IODevice Data type: iodev
A reference to the file or serial channel to open. This reference is then used for
reading from and writing to the file/channel.
The arguments \Read, \Write, \Append and \Bin are mutually exclusive. If none of these
are specified, the instruction acts in the same way as the \Write argument.
[\Read] Data type: switch
Opens a character-based file or serial channel for reading. When reading from a
file, the reading is started from the beginning of the file.
[\Write] Data type: switch
Opens a character-based file or serial channel for writing. If the selected file
already exists, its contents are deleted. Anything subsequently written is written
at the start of the file.
RAPID Reference Manual 8-Open-1