Specifications

Using Callable System Routines
10.3 System Services
Table 10–3 (Cont.) Summary of System Services
Service Function
I/O Services
$DELMBX Marks a permanent mailbox for deletion.
$DEVICE_SCAN Returns the names of all devices that match a specified set
of search criteria.
$DISMOU Dismounts a mounted volume or volume sets.
†$DNS (AND $DNSW) Allows client applications to store resource names and
addresses (and wait).
$FAO Converts a binary value into an ASCII character string in
decimal, hexadecimal, or octal notation and returns the
character string in an output string, and inserts variable
character string data into an output string.
$FAOL Provides an alternate method for specifying input
parameters when calling the $FAO system service.
$GETDVI (and $GETDVIW) Returns information related to the primary and secondary
device characteristics of an I/O device (and wait).
$GETMSG Returns message text associated with a given message
identification code into the caller’s buffer.
$GETQUI (and $GETQUIW) Returns information about queues and the jobs initiated
from those queues (and wait).
$INIT_VOL Formats a disk or magnetic tape volume and writes a label
on the volume.
$MOUNT Mounts a tape, disk volume, or volume set and specifies
options for the mount operation.
$PUTMSG Writes informational and error messages to processes.
$QIO (and $QIOW) Queues an I/O request to a channel associated with a
device (and wait).
$RMSRUNDWN Closes all files opened by OpenVMS RMS for the image or
process and halts I/O activity.
$SNDERR Writes a user-specified message to the system error log
file, preceding it with the date and time.
$SNDJBC (and $SNDJBCW) Creates, stops, and manages queues and the batch and
print jobs in those queues (and wait).
$SNDOPR Performs the following functions:
• Sends a user request to operator terminals
• Sends a user cancellation request to operator
terminals
• Sends an operator reply to a user terminal
• Enables an operator terminal
• Displays the status of an operator terminal
• Initializes the operator log file
†VAX specific
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10–9