| Chapter 23 |
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23
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System Service Input/Output Operations
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23.1
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Overview of OpenVMS QIO Operations
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23.2
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Quotas, Privileges, and Protection
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23.2.1
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Buffered I/O Quota
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23.2.2
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Buffered I/O Byte Count Quota
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23.2.3
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Direct I/O Quota
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23.2.4
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AST Quota
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23.2.5
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Physical I/O Privilege
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23.2.6
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Logical I/O Privilege
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23.2.7
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Mount Privilege
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23.2.8
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Share Privilege
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23.2.9
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Volume Protection
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23.2.10
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Device Protection
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23.2.11
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System Privilege
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23.2.12
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Bypass Privilege
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23.3
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Physical, Logical, and Virtual I/O
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23.3.1
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Physical I/O Operations
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23.3.2
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Logical I/O Operations
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23.3.3
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Virtual I/O Operations
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23.4
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I/O Function Encoding
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23.4.1
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Function Codes
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23.4.2
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Function Modifiers
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23.5
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Assigning Channels
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23.5.1
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Using the Share Privilege with the SYS$ASSIGN and SYS$DASSGN Services
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23.6
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Queuing I/O Requests
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23.7
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Synchronizing Service Completion
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23.8
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Recommended Method for Testing Asynchronous Completion
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23.9
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Synchronous and Asynchronous Forms of Input/Output Services
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23.9.1
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Reading Operations with SYS$QIOW
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23.9.2
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Reading Operations with SYS$QIO
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23.9.3
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Write Operations with SYS$QIOW
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23.10
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I/O Completion Status
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23.11
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Deassigning I/O Channels
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23.12
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Using Complete Terminal I/O
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23.13
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Canceling I/O Requests
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23.14
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Logical Names and Physical Device Names
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23.15
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Device Name Defaults
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23.16
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Obtaining Information About Physical Devices
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23.16.1
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Checking the Terminal Device
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23.16.2
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Terminal Characteristics
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23.16.3
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Record Terminators
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23.16.4
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File Terminators
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23.17
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Device Allocation
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23.17.1
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Implicit Allocation
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23.17.2
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Deallocation
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23.18
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Mounting, Dismounting, and Initializing Volumes
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23.18.1
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Mounting a Volume
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23.18.1.1
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Calling the SYS$MOUNT System Service
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23.18.1.2
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Calling the SYS$DISMOU System Service
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23.18.2
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Initializing Volumes
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23.18.2.1
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Calling the Initialize Volume System Service
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23.19
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Formatting Output Strings
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23.20
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Mailboxes
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23.20.1
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Mailbox Name
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23.20.2
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System Mailboxes
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23.20.3
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Mailboxes for Process Termination Messages
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23.21
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Example of Using I/O Services
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23.22
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Fast I/O and Fast Path Features (Alpha Only)
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23.22.1
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Fast I/O (Alpha Only)
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23.22.1.1
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Fast I/O Benefits
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23.22.1.2
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Buffer Objects
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23.22.2
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Fast Path (Alpha Only)
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23.22.2.1
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Fast Path Features and Benefits
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23.22.2.2
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Additional Information About Fast Path
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| Chapter 24 |
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24
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Using Run-Time Library Routines to Access Operating System Components
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24.1
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System Service Access Routines
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24.2
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Access to the Command Language Interpreter
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24.2.1
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Obtaining the Command Line
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24.2.2
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Chaining from One Program to Another
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24.2.3
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Executing a CLI Command
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24.2.4
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Using Symbols and Logical Names
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24.2.5
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Disabling and Enabling Control Characters
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24.2.6
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Creating and Connecting to a Subprocess
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24.3
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Access to VAX Machine Instructions
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24.3.1
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Variable-Length Bit Field Instruction Routines
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24.3.2
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Integer and Floating-Point Routines
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24.3.3
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Queue Access Routines
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24.3.4
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Character String Routines
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24.3.5
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Miscellaneous Instruction Routines
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24.4
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Processwide Resource Allocation Routines
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24.4.1
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Allocating Logical Unit Numbers
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24.4.2
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Allocating Event Flag Numbers
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24.5
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Performance Measurement Routines
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24.6
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Output Formatting Control Routines
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24.7
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Miscellaneous Interface Routines
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24.7.1
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Indicating Asynchronous System Trap in Progress
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24.7.2
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Create a Directory or Subdirectory
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24.7.3
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File Searching Routines
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24.7.4
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Inserting an Entry into a Balanced Binary Tree
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