HP OpenVMS System Services Reference Manual 2

This document is the "HP OpenVMS System Services Reference Manual: GETUTC–Z", published in January 2005 for OpenVMS I64 Version 8.2 and OpenVMS Alpha Version 8.2. It is intended for system and application programmers.

The manual provides detailed descriptions of a wide range of HP OpenVMS system services, specifically covering those whose names fall alphabetically between GETUTC and Z. These services are fundamental routines used by the OpenVMS operating system for controlling resources, facilitating interprocess communication, managing I/O, and performing other system-level functions.

A significant aspect of this edition is its comprehensive support for 64-bit virtual memory addressing on Alpha and I64 systems, with many services being enhanced or having dedicated _64 variants to handle 64-bit addresses. Each service description includes its purpose, format, arguments, C prototype, detailed description, required access/privileges, quotas, related services, and condition values returned.

Key areas covered by the services include:

• Time Management: Converting and setting system time, including UTC.
• Fault and Exception Handling: Getting information on alignment faults and arithmetic exceptions, and managing their reporting.
• Transaction Management: Starting, joining, and managing distributed transactions.
• Process Control: Modifying process affinity, user capabilities, priority, and managing process states (hibernate, suspend, wake, reschedule).
• Memory Management: Locking and unlocking pages in memory and working sets, creating and mapping global sections.
• Security Features: Retrieving and setting security characteristics for objects, hashing passwords, managing user personas and proxies.
• Input/Output Operations: Performing fast I/O, queuing I/O requests, and sending messages to operators or error logs.
• Logical Name Services: Translating logical names.
• Queue Management: Creating, altering, and managing batch and print queues and jobs.
• System Event Notification: Setting up notifications for cluster and other system events.
• IEEE Floating-Point Control: Setting precision and rounding modes.
• Volume Management: Initializing and mounting volumes.

The document also includes a list of obsolete services and emphasizes referring to other related OpenVMS manuals for broader conceptual understanding.