Guardian Procedure Calls Reference Manual

FILE_GETINFOLISTBYNAME_ procedure. For a list of the device types, see Appendix A: Device
Types and Subtypes.
physical-recordlen
output
INT:ref:1
returns the physical record length associated with the file. Physical record length is determined
as follows:
• nondisk devices
physical-recordlen is the configured record length.
• disk files
physical-recordlen is the maximum possible transfer length. The transfer length is
equal to the configured buffer size for the device (either 2048 or 4096 bytes). (For an
Enscribe disk file, the logical record length can be obtained through the
FILE_GETINFO[BYNAME]_, FILE_GETINFOLIST[BYNAME]_, or FILERECINFO procedure.)
• processes and $RECEIVE file
a length of 132 is returned in physical-recordlen. This is the system convention for
interprocess files.
Considerations
• All parameters are required. If any are missing, or in error, DEVICEINFO returns with no error
indication.
• When DEVICEINFO is called with a file name that designates a subtype 30 process, it sends
a device-type inquiry system message to the process to determine the device type and subtype.
The format of this completion message is described in the Guardian Procedure Errors and
Messages Manual.
• A deadlock occurs if a subtype 30 process calls DEVICEINFO on its own process name.
• For interprocess messages directed to a process pair, file-system errors 200 (ownership) and
201 (path down) are retried automatically to the other member of the pair.
314 Guardian Procedure Calls (D-E)