Document revision date: 19 July 1999

Chapter 11
11	System Service Input/Output Operations
11.1	Overview of OpenVMS QIO Operations
11.2	Quotas, Privileges, and Protection
11.2.1	Buffered I/O Quota
11.2.2	Buffered I/O Byte Count Quota
11.2.3	Direct I/O Quota
11.2.4	AST Quota
11.2.5	Physical I/O Privilege
11.2.6	Logical I/O Privilege
11.2.7	Mount Privilege
11.2.8	Share Privilege
11.2.9	Volume Protection
11.2.10	Device Protection
11.2.11	System Privilege
11.2.12	Bypass Privilege
11.3	Physical, Logical, and Virtual I/O
11.3.1	Physical I/O Operations
11.3.2	Logical I/O Operations
11.3.3	Virtual I/O Operations
11.4	I/O Function Encoding
11.4.1	Function Codes
11.4.2	Function Modifiers
11.5	Assigning Channels
11.5.1	Using the Share Privilege with the SYS$ASSIGN and SYS$DASSGN Services
11.6	Queuing I/O Requests
11.7	Synchronizing Service Completion
11.8	Recommended Method for Testing Asynchronous Completion
11.9	Synchronous and Asynchronous Forms of Input/Output Services
11.9.1	Reading Operations with SYS$QIOW
11.9.2	Reading Operations with SYS$QIO
11.9.3	Write Operations with SYS$QIOW
11.10	I/O Completion Status
11.11	Deassigning I/O Channels
11.12	Using Complete Terminal I/O
11.13	Canceling I/O Requests
11.14	Logical Names and Physical Device Names
11.15	Device Name Defaults
11.16	Obtaining Information About Physical Devices
11.16.1	Checking the Terminal Device
11.16.2	Terminal Characteristics
11.16.3	Record Terminators
11.16.4	File Terminators
11.17	Device Allocation
11.17.1	Implicit Allocation
11.17.2	Deallocation
11.18	Mounting, Dismounting, and Initializing Volumes
11.18.1	Mounting a Volume
11.18.1.1	Calling the SYS$MOUNT System Service
11.18.1.2	Calling the SYS$DISMOU System Service
11.18.2	Initializing Volumes
11.18.2.1	Calling the Initialize Volume System Service
11.19	Formatting Output Strings
11.20	Mailboxes
11.20.1	Mailbox Name
11.20.2	System Mailboxes
11.20.3	Mailboxes for Process Termination Messages
11.21	Example of Using I/O Services
11.22	Fast I/O and Fast Path Features
11.22.1	Fast I/O
11.22.1.1	Fast I/O Benefits
11.22.1.2	Buffer Objects
11.22.1.3	Additional Information About Fast I/O and Buffer Objects
11.22.2	Past Path
11.22.2.1	Fast Path Features and Benefits
11.22.2.2	Additional Information About Fast Path
Chapter 12
12	Logical Name and Logical Name Tables
12.1	Logical Name System Services and DCL Commands
12.1.1	Logical Names, Equivalence Names, and Search Lists
12.1.2	Logical Name Tables
12.1.2.1	Logical Name Directory Tables
12.1.2.2	Process, Job, Group, System and Clusterwide Default Logical Name Tables
12.1.2.2.1	Process Logical Name Table
12.1.2.2.2	Job Logical Name Table
12.1.2.2.3	Group Logical Name Table
12.1.2.2.4	System Logical Name Table
12.1.2.2.5	Clusterwide Logical Name Table
12.1.3	Logical Name Table Names and Search Lists
12.1.4	Specifying the Logical Name Table Search List
12.2	Creating User-Defined and Clusterwide Logical Name Tables
12.2.1	Creating Clusterwide Logical Name Tables
12.3	Checking Access and Protection
12.4	Specifying Access Modes
12.5	Translating Logical Names
12.6	Specifying Attributes
12.7	Establishing Logical Name Table Quotas
12.7.1	Directory Table Quotas
12.7.2	Default Logical Name Table Quotas
12.7.3	Job Logical Name Table Quotas
12.7.4	User-Defined Logical Name Table Quotas
12.8	Interprocess Communication
12.9	Using Logical Name and Equivalence Name Format Conventions
12.10	Using Logical Names and Logical Name Table System Services in Programs
12.10.1	Using SYS$CRELNM to Create a Logical Name
12.10.2	Using SYS$CRELNT to Create Logical Name Tables
12.10.3	Using SYS$DELLNM to Delete Logical Names
12.10.4	Using SYS$TRNLNM to Translate Logical Names
12.10.5	Using SYS$CRELNM, SYS$TRNLNM, and SYS$DELLNM in a Program Example

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