MPE/iX Intrinsics Reference Manual (32650-90875)

Chapter 7 383
Command Definitions (HP32208-HPLOACNMPROC)
HPFOPEN
bound to the volume (the volume set is an attribute of the group in which
the file resides).
Only one of the following options can be in effect when a file is opened with
this option:
itemnum =20
itemnum =22
itemnum =23
itemnum =42
Default: A disk file located on the volume class DISC associated with the
group in which file resides.
A character placed in the first element designates the delimiter used by
HPFOPEN to search for the end of the character array. The delimiter can
appear again only following the last valid character of the character array,
for example:
%volclass% (% is the delimiter, volclass is the designator)
fabcxyzf ( f is the delimiter, abcxyz is the designator)
This
itemnum may not be specified when creating hierarchical directories.
(ASC) Not used for asynchronous devices.
23/CA Volume name:
Passes a character array representing a volume name that restricts the
file specified to a specific volume. The volume must reside within the
volume set of the group where the file resides. This option is applicable
only at file creation.
Only one of the following options can be in effect when a file is opened with
this option:
itemnum =20
itemnum =22
itemnum =23
itemnum =42
Default: A disk file located on the volume class DISC associated with the
group in which the file resides.
This
itemnum may not be specified when creating hierarchical directories.
(ASC) Not used for asynchronous devices.
24/I32 Density:
Passes the tape density required when writing to a tape file. This option is
applicable only when writing to a tape on a drive that supports more than
one density. When reading from a tape, the density of the tape overrides
this option