OpenVMS Record Management Services Reference Manual

Document revision date: 15 July 2002

OpenVMS Record Management Services Reference Manual

Contents

Index

Table RMS-44 lists the RAB control block fields written as output by the Get service.

Table RMS-44 Get Service RAB Output Fields
Field Name Description

RAB$L_BKT Bucket code: set to the relative record number for relative files when the record access mode is sequential.

RAB$L_RBF Record buffer address.

RAB$W_RFA Record file address.

RAB$W_RSZ Record size.

RAB$L_STS Completion status code (also returned in register 0).

RAB$L_STV Status value (contains a terminator character for terminal input or the record length if the requested record is too large for the user buffer area).

**Table RMS-44 Get Service RAB Output Fields**
Field Name	Description
RAB$L_BKT	Bucket code: set to the relative record number for relative files when the record access mode is sequential.
RAB$L_RBF	Record buffer address.
RAB$W_RFA	Record file address.
RAB$W_RSZ	Record size.
RAB$L_STS	Completion status code (also returned in register 0).
RAB$L_STV	Status value (contains a terminator character for terminal input or the record length if the requested record is too large for the user buffer area).

RAB64 Control Block Fields (Alpha Only)

Table RMS-45 lists the Alpha-only RAB64 control block fields read as input by the Get service. These fields are comparable to the RAB fields described in Table RMS-43. For additional information on the fields accessed by this service, see Part 2.

Table RMS-45 Get Service RAB64 Input Fields (Alpha Only)
Field Name Description

RAB64$B_BLN This field must be initialized to RAB64$C_BLN64 in order for RAB64 fields to be used.

RAB64$W_ISI Internal stream identifier (required). Equates to RAB$W_ISI.

RAB64$L_KBF Key buffer address. This field must contain -1 if you want to use RAB64$PQ_KBF. For 32-bit addressing, this field equates to RAB$L_KBF (see Table RMS-43).

RAB64$PQ_KBF Key buffer 64-bit address (used if RAB64$L_KBF contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.

RAB64$B_KRF Key of reference. Equates to RAB$B_KRF (see Table RMS-43).

RAB64$B_KSZ Key buffer size. Equates to RAB$B_KSZ (see Table RMS-43).

RAB64$L_PBF ¹ Prompt buffer address. Equates to RAB$L_PBF (see Table RMS-43).

RAB64$B_PSZ ¹ Prompt buffer size. Equates to RAB$B_PSZ (see Table RMS-43).

RAB64$B_RAC Record access mode. Equates to RAB$B_RAC and constants described in Table RMS-43. The constants are identical except for the RAB64 prefix; for example, RAB64$C_KEY equates to RAB$C_KEY.

RAB64$W_RFA Record file address. Equates to RAB$W_RFA (see Table RMS-43).

RAB64$L_RHB Record header buffer. This field must contain -1 if you want to use RAB64$PQ_RHB. For 32-bit addressing, this field equates to RAB$L_RHB (see Table RMS-43).

RAB64$PQ_RHB Record header buffer 64-bit address (used if RAB64$L_RHB contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.

RAB64$L_ROP Record-processing options. Equates to RAB$L_ROP and options described in Table RMS-43. Options are identical except for the RAB64 prefix; for example, option RAB64$V_ASY equates to RAB$V_ASY.

RAB64$W_ROP_2 ¹ Extended record-processing options. Equates to RAB$W_ROP_2 and options described in Table RMS-43. Options are identical except for the RAB64 prefix; for example, option RAB64$V_NODLCKWT equates to RAB$V_NODLCKWT.

RAB64$B_TMO ¹ Timeout period. Equates to RAB$B_TMO (see Table RMS-43).

RAB64$L_UBF ² User record buffer address. This field must contain -1 if you want to use RAB64$PQ_UBF. For 32-bit addressing, this field equates to RAB$L_UBF (see Table RMS-43).

RAB64$PQ_UBF ² User record buffer 64-bit address (used if RAB64$L_UBF contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.

RAB64$W_USZ ² User record buffer size. This field is ignored in favor of RAB64$Q_USZ if RAB64$L_UBF contains -1 . Otherwise, this field equates to RAB$W_USZ (see Table RMS-43).

RAB64$Q_USZ ² User record buffer size. This field must be used when RAB64$L_UBF contains -1 and a value is specified in RAB64$PQ_UBF.

RAB64$L_XAB Next XAB address. Equates to RAB$L_XAB and its XABTRM option (see Table RMS-43).

**Table RMS-45 Get Service RAB64 Input Fields (Alpha Only)**
Field Name	Description
RAB64$B_BLN	This field must be initialized to RAB64$C_BLN64 in order for RAB64 fields to be used.
RAB64$W_ISI	Internal stream identifier (required). Equates to RAB$W_ISI.
RAB64$L_KBF	Key buffer address. This field must contain -1 if you want to use RAB64$PQ_KBF. For 32-bit addressing, this field equates to RAB$L_KBF (see Table RMS-43).
RAB64$PQ_KBF	Key buffer 64-bit address (used if RAB64$L_KBF contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.
RAB64$B_KRF	Key of reference. Equates to RAB$B_KRF (see Table RMS-43).
RAB64$B_KSZ	Key buffer size. Equates to RAB$B_KSZ (see Table RMS-43).
RAB64$L_PBF ¹	Prompt buffer address. Equates to RAB$L_PBF (see Table RMS-43).
RAB64$B_PSZ ¹	Prompt buffer size. Equates to RAB$B_PSZ (see Table RMS-43).
RAB64$B_RAC	Record access mode. Equates to RAB$B_RAC and constants described in Table RMS-43. The constants are identical except for the RAB64 prefix; for example, RAB64$C_KEY equates to RAB$C_KEY.
RAB64$W_RFA	Record file address. Equates to RAB$W_RFA (see Table RMS-43).
RAB64$L_RHB	Record header buffer. This field must contain -1 if you want to use RAB64$PQ_RHB. For 32-bit addressing, this field equates to RAB$L_RHB (see Table RMS-43).
RAB64$PQ_RHB	Record header buffer 64-bit address (used if RAB64$L_RHB contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.
RAB64$L_ROP	Record-processing options. Equates to RAB$L_ROP and options described in Table RMS-43. Options are identical except for the RAB64 prefix; for example, option RAB64$V_ASY equates to RAB$V_ASY.
RAB64$W_ROP_2 ¹	Extended record-processing options. Equates to RAB$W_ROP_2 and options described in Table RMS-43. Options are identical except for the RAB64 prefix; for example, option RAB64$V_NODLCKWT equates to RAB$V_NODLCKWT.
RAB64$B_TMO ¹	Timeout period. Equates to RAB$B_TMO (see Table RMS-43).
RAB64$L_UBF ²	User record buffer address. This field must contain -1 if you want to use RAB64$PQ_UBF. For 32-bit addressing, this field equates to RAB$L_UBF (see Table RMS-43).
RAB64$PQ_UBF ²	User record buffer 64-bit address (used if RAB64$L_UBF contains -1 ). This field can hold either a 64-bit address or a 32-bit address sign-extended to 64 bits.
RAB64$W_USZ ²	User record buffer size. This field is ignored in favor of RAB64$Q_USZ if RAB64$L_UBF contains -1 . Otherwise, this field equates to RAB$W_USZ (see Table RMS-43).
RAB64$Q_USZ ²	User record buffer size. This field must be used when RAB64$L_UBF contains -1 and a value is specified in RAB64$PQ_UBF.
RAB64$L_XAB	Next XAB address. Equates to RAB$L_XAB and its XABTRM option (see Table RMS-43).

¹This field is not supported for DECnet for OpenVMS operations.
²One of the UBF fields must contain an address and the USZ field associated with it must contain a size.

Table RMS-46 lists the Alpha-only RAB64 control block fields written as output by the Get service. These fields are comparable to the RAB fields described in Table RMS-44.

Table RMS-46 Get Service RAB64 Output Fields (Alpha Only)
Field Name Description

RAB64$L_BKT Bucket code. Equates to RAB$L_BKT (see Table RMS-44).

RAB64$L_RBF Record buffer address is returned to this field if RAB64$L_UBF does not contain -1 . Equates to RAB$L_RBF.

RAB64$PQ_RBF Record buffer address is returned to this field if RAB64$L_UBF contains -1 .

RAB64$W_RFA Record file address. Equates to RAB$W_RFA.

RAB64$W_RSZ Record buffer size is returned to this field if RAB64$L_UBF does not contain -1 . Equates to RAB$W_RSZ.

RAB64$Q_RSZ Record buffer size is returned to this field if RAB64$L_UBF contains -1 .

RAB64$L_STS Completion status code. Equates to RAB$L_STS (see Table RMS-44).

RAB64$L_STV Status value. Equates to RAB$L_STV (see Table RMS-44).

**Table RMS-46 Get Service RAB64 Output Fields (Alpha Only)**
Field Name	Description
RAB64$L_BKT	Bucket code. Equates to RAB$L_BKT (see Table RMS-44).
RAB64$L_RBF	Record buffer address is returned to this field if RAB64$L_UBF does not contain -1 . Equates to RAB$L_RBF.
RAB64$PQ_RBF	Record buffer address is returned to this field if RAB64$L_UBF contains -1 .
RAB64$W_RFA	Record file address. Equates to RAB$W_RFA.
RAB64$W_RSZ	Record buffer size is returned to this field if RAB64$L_UBF does not contain -1 . Equates to RAB$W_RSZ.
RAB64$Q_RSZ	Record buffer size is returned to this field if RAB64$L_UBF contains -1 .
RAB64$L_STS	Completion status code. Equates to RAB$L_STS (see Table RMS-44).
RAB64$L_STV	Status value. Equates to RAB$L_STV (see Table RMS-44).

Condition Values Returned

The following condition values can be returned. Use the Help Message utility to access online message descriptions. For more information about interpreting condition values, see Section 2.4.

RMS$_ACT	RMS$_ANI	RMS$_BES
RMS$_BLN	RMS$_BUG	RMS$_BUG_DAP
RMS$_CDA	RMS$_CHK	RMS$_CONTROLC
RMS$_CONTROLY	RMS$_DEADLOCK	RMS$_DEL
RMS$_DME	RMS$_DNR	RMS$_EOF
RMS$_ENQ	RMS$_EXENQLM	RMS$_EXP
RMS$_EXT_ERR	RMS$_FAC	RMS$_FTM
RMS$_IBF	RMS$_IDXSEARCH	RMS$_IOP
RMS$_IRC	RMS$_ISI	RMS$_KBF
RMS$_KEY	RMS$_KRF	RMS$_KSZ
RMS$_MRN	RMS$_NET	RMS$_NETBTS
RMS$_NETFAIL	RMS$_NORMAL	RMS$_OK_ALK
RMS$_OK_DEL	RMS$_OK_LIM	RMS$_OK_RLK
RMS$_OK_RNF	RMS$_OK_RRL	RMS$_OK_WAT
RMS$_OPNOTSUP	RMS$_PBF	RMS$_PENDING
RMS$_PES	RMS$_PLG	RMS$_RAB
RMS$_RAC	RMS$_RER	RMS$_RFA
RMS$_RHB	RMS$_RLK	RMS$_RNF
RMS$_ROP	RMS$_RPL	RMS$_RRV
RMS$_RSA	RMS$_RTB	RMS$_SQO
RMS$_STR	RMS$_SUC	RMS$_SUP
RMS$_SUPPORT	RMS$_SYS	RMS$_TMO
RMS$_TNS	RMS$_TRE	RMS$_UBF
RMS$_WBE	RMS$_WER	RMS$_WLK
RMS$_XAB

$NXTVOL

The Next Volume service allows you to process the next tape volume in a multiple volume set. This service applies only to files on magnetic tape volumes.

RAB64 Users (Alpha Only)
On Alpha systems, RAB64 can replace the RAB or RAB prefix wherever it is used with the Next Volume service on OpenVMS Alpha systems.

Format

SYS$NXTVOL rab [,[err] [,suc]]

RETURNS

OpenVMS usage: cond_value

type: longword

access: write only

mechanism: by value

The value is returned in symbolic offset RAB$L_STS. Symbolic offset RAB$L_STV may contain additional status information.

Arguments

rab

OpenVMS usage: rab

type: longword (unsigned)

access: modify

mechanism: by reference

RAB control block whose contents are to be used as indirect arguments for the Next Volume service call. The rab argument is the address of the RAB control block.
err

OpenVMS usage: ast_procedure

type: procedure value

access: call without stack unwinding

mechanism: by reference

AST-level error completion routine that the service invokes if the operation is unsuccessful. The err argument is the address of the entry mask of this user-written completion routine.
suc

OpenVMS usage: ast_procedure

type: procedure value

access: call without stack unwinding

mechanism: by reference

AST-level success completion routine that the service invokes if the operation is successful. The suc argument is the address of the entry mask of this user-written completion routine.

Description

You use the Next Volume service when you want to proceed to the next volume in the set before the end of the current volume (EOV label) is reached on input, or before the end-of-tape (EOT) mark is reached on output. RMS positions your process to the first file section on the next volume. File sections occur when a file is written on more than one volume, the portion of the file on each of the volumes constituting a file section.
When you perform a Next Volume service for input files, RMS responds as follows:

If the current volume is the last volume of the set, RMS reports end-of-file information.
If another file section exists, the next volume is mounted. When necessary, the current volume is rewound and a request to mount the next volume is issued to the operator.
The header label (HDR1) of the file section on the newly mounted volume is read. If this is not the volume being sought, the operator is requested to mount the correct volume.

When you perform a Next Volume service for output files, the following sequence occurs:

The file section on the current volume is closed with the appropriate end-of-volume labels, and the volume is rewound.
The next volume is mounted.
A file with the same file name and the next higher file section number is opened for output, and processing continues.

If your program is operating asynchronously, it must wait for any I/O activity on this volume to complete before issuing a Next Volume service.
The Next Volume service performs a Flush service for write-accessed volumes (see $FLUSH), thus writing the I/O buffers on the current volume before creating the next file section. If this is an input-only file, then all records currently contained in the I/O buffers are lost, and the next Get service returns the first record on the next volume.
The Next Volume service is not supported for DECnet for OpenVMS operations on files between two OpenVMS systems.
Table RMS-47 lists the control block fields read as input and written as output by the Next Volume service. For additional information on the fields accessed by this service, see Part 2.

Table RMS-47 Next Volume Service RAB Input Fields
Field Name Option Description

RAB$W_ISI Internal stream identifier (required).

RAB$L_ROP Record-processing options.

RAB$V_ASY Asynchronous: performs Next Volume service asynchronously.

Table RMS-48 lists the control block fields written as output by the Next Volume service.

Table RMS-48 Delete Service RAB Output Fields
Field Name Description

RAB$L_STS Completion status code (also returned in register 0).

RAB$L_STV Status value.

**Table RMS-47 Next Volume Service RAB Input Fields**
Field Name	Option	Description
RAB$W_ISI		Internal stream identifier (required).
RAB$L_ROP		Record-processing options.
	RAB$V_ASY	Asynchronous: performs Next Volume service asynchronously.

**Table RMS-48 Delete Service RAB Output Fields**
Field Name	Description
RAB$L_STS	Completion status code (also returned in register 0).
RAB$L_STV	Status value.

Condition Values Returned

The following condition values can be returned. Use the Help Message utility to access online message descriptions. For more information about interpreting condition values, see Section 2.4.

RMS$_ACT	RMS$_BLN	RMS$_CDA
RMS$_DME	RMS$_DNR	RMS$_DPE
RMS$_EXT_ERR	RMS$_IOP	RMS$_ISI
RMS$_NORMAL	RMS$_OPNOTSUP	RMS$_PENDING
RMS$_RAB	RMS$_RSA	RMS$_STR
RMS$_SUC	RMS$_SUP	RMS$_SUPPORT
RMS$_SYS

$OPEN

The Open service makes an existing file available for processing by your program. The Open service specifies the type of record access to be used and determines whether the file can be shared. The Open service also performs an implicit Display service. The maximum number of files that can be open within an image at one time is 16383.

Format

SYS$OPEN fab [,[err] [,suc]]

RETURNS

OpenVMS usage: cond_value

type: longword

access: write only

mechanism: by value

The value is returned in symbolic offset FAB$L_STS. Symbolic offset FAB$L_STV may contain additional status information.

Arguments

fab

OpenVMS usage: fab

type: longword (unsigned)

access: modify

mechanism: by reference

FAB control block whose contents are to be used as indirect arguments for the Open service call. The fab argument is the address of the FAB control block.
err

OpenVMS usage: ast_procedure

type: procedure value

access: call without stack unwinding

mechanism: by reference

AST-level error completion routine that the service invokes if the operation is unsuccessful. The err argument is the address of the entry mask of this user-written completion routine.
suc

OpenVMS usage: ast_procedure

type: procedure value

access: call without stack unwinding

mechanism: by reference

AST-level success completion routine that the service invokes if the operation is successful. The suc argument is the address of the entry mask of this user-written completion routine.

Description

You must open a file to perform any record operations and most file operations. If any XABs are chained to the FAB, RMS places the attribute values in the fields of the appropriate XAB. If you specify a NAM or NAML block in the FAB, the contents of the device, directory, and file identification fields can be used with the open-by-NAM-block option to open the file. The NAM or NAML block fields are filled in with auxiliary file specification information.
Table RMS-49 lists the FAB and XAB control block fields read as input by the Open service. For additional information on the fields accessed by this service, see Part 2.

Table RMS-49 Open Service FAB and XAB Input Fields
Field Name Option or
XAB Type Description

FAB$B_ACMODES File access modes.

FAB$V_CHAN_MODE ¹ Assigns the channel access mode by setting either the FAB$V_UFO or the FAB$V_NFS bit in the FAB$L_FOP field (see Section 4.17). If neither bit is set, this field can be used to override the access mode protection for a specified I/O operation. See Section 4.8.

FAB$V_LNM_MODE ¹ Specifies the logical name translation access mode.

FAB$W_DEQ Default file extension quantity: if a nonzero value is present in this field, it applies only to this open of the file.

FAB$L_DNA Default file specification string address.

FAB$B_DNS Default file specification string size.

FAB$B_FAC File access field.

FAB$V_BIO Block I/O access.

FAB$V_BRO Block or record I/O.

FAB$V_DEL Delete access.

FAB$V_GET ² Read access.

FAB$V_PUT Write access.

FAB$V_TRN Truncate access.

FAB$V_UPD Update access.

FAB$L_FNA ³ File specification string address.

FAB$B_FNS ³ File specification string size.

FAB$L_FOP File-processing options.

FAB$V_ASY Asynchronous; indicates that the specified task is to be done asynchronously.

FAB$V_DFW ¹ Deferred write: indicates that writing back to the file from the modified buffer is deferred (applies to relative and indexed files only).

FAB$V_DLT Delete: indicates the file is to be deleted when it is closed.

FAB$V_NAM ¹ Name block inputs: indicates that the NAM$W_FID, NAM$W_DID, and NAM$T_DVI fields in the specified NAM or NAML block are to be used to describe the file.

FAB$V_NFS ¹ Non-file-structured: indicates that the accessed volume is to be processed in a non-file-structured manner.

FAB$V_OFP Output file parse: specifies that the related file resultant file specification string, if used, is to provide file name and file type defaults only.

FAB$V_RCK Read-check: indicates that transfers from disk are to be checked by a followup, read-compare operation.

FAB$V_RWC Rewind on close (applies to magnetic tapes only).

FAB$V_RWO Rewind on open (applies to magnetic tapes only).

FAB$V_SCF ¹ Submit command file: indicates that the file is to be submitted as a batch-command file to the process default batch queue (SYS$BATCH) when the file is closed (applies to sequential files only).

FAB$V_SPL ¹ Spool: indicates that the file is to be spooled to the process default print queue (SYS$PRINT) when the file is closed (applies to sequential files only).

FAB$V_SQO Sequential only: indicates that the file can be processed in a sequential manner only.

FAB$V_TEF Truncate at end of file: indicates that unused space allocated to a file is to be deallocated when that file is closed (applies to sequential files only).

FAB$V_UFO ¹ User file open: indicates the file is to be opened only (no further processing of that file is allowed).

FAB$V_WCK Write-check: indicates that transfers to disk are to be followed by a read-compare operation.

FAB$B_FSZ Fixed control area size: unit record devices only.

FAB$W_IFI Internal file identifier (must be 0).

FAB$L_NAM NAM or NAML block address.

FAB$B_RAT Record attributes; only for process permanent files with print file format.

FAB$B_RFM Record format; unit record devices only.

FAB$B_RTV ¹ Retrieval window size.

FAB$B_SHR File-sharing field.

FAB$V_SHRDEL Shared delete access.

FAB$V_SHRGET Shared read access.

FAB$V_MSE ¹ Multistream access; also used with the FAB$V_MSE and FAB$V_GET bits to specify a read-only global buffer cache when global buffering is enabled.

FAB$V_NIL No shared access.

FAB$V_SHRPUT Shared write access.

FAB$V_SHRUPD Shared update access.

FAB$V_UPI Shared write access for block I/O (applies to sequential files only).

FAB$V_NQL No query record locking.

FAB$L_XAB ⁴ Extended attribute block address.

XABITM Item list XAB; see Chapter 12.

**Table RMS-49 Open Service FAB and XAB Input Fields**
Field Name	Option or XAB Type	Description
FAB$B_ACMODES		File access modes.
	FAB$V_CHAN_MODE ¹	Assigns the channel access mode by setting either the FAB$V_UFO or the FAB$V_NFS bit in the FAB$L_FOP field (see Section 4.17). If neither bit is set, this field can be used to override the access mode protection for a specified I/O operation. See Section 4.8.
	FAB$V_LNM_MODE ¹	Specifies the logical name translation access mode.
FAB$W_DEQ		Default file extension quantity: if a nonzero value is present in this field, it applies only to this open of the file.
FAB$L_DNA		Default file specification string address.
FAB$B_DNS		Default file specification string size.
FAB$B_FAC		File access field.
	FAB$V_BIO	Block I/O access.
	FAB$V_BRO	Block or record I/O.
	FAB$V_DEL	Delete access.
	FAB$V_GET ²	Read access.
	FAB$V_PUT	Write access.
	FAB$V_TRN	Truncate access.
	FAB$V_UPD	Update access.
FAB$L_FNA ³		File specification string address.
FAB$B_FNS ³		File specification string size.
FAB$L_FOP		File-processing options.
	FAB$V_ASY	Asynchronous; indicates that the specified task is to be done asynchronously.
	FAB$V_DFW ¹	Deferred write: indicates that writing back to the file from the modified buffer is deferred (applies to relative and indexed files only).
	FAB$V_DLT	Delete: indicates the file is to be deleted when it is closed.
	FAB$V_NAM ¹	Name block inputs: indicates that the NAM$W_FID, NAM$W_DID, and NAM$T_DVI fields in the specified NAM or NAML block are to be used to describe the file.
	FAB$V_NFS ¹	Non-file-structured: indicates that the accessed volume is to be processed in a non-file-structured manner.
	FAB$V_OFP	Output file parse: specifies that the related file resultant file specification string, if used, is to provide file name and file type defaults only.
	FAB$V_RCK	Read-check: indicates that transfers from disk are to be checked by a followup, read-compare operation.
	FAB$V_RWC	Rewind on close (applies to magnetic tapes only).
	FAB$V_RWO	Rewind on open (applies to magnetic tapes only).
	FAB$V_SCF ¹	Submit command file: indicates that the file is to be submitted as a batch-command file to the process default batch queue (SYS$BATCH) when the file is closed (applies to sequential files only).
	FAB$V_SPL ¹	Spool: indicates that the file is to be spooled to the process default print queue (SYS$PRINT) when the file is closed (applies to sequential files only).
	FAB$V_SQO	Sequential only: indicates that the file can be processed in a sequential manner only.
	FAB$V_TEF	Truncate at end of file: indicates that unused space allocated to a file is to be deallocated when that file is closed (applies to sequential files only).
	FAB$V_UFO ¹	User file open: indicates the file is to be opened only (no further processing of that file is allowed).
	FAB$V_WCK	Write-check: indicates that transfers to disk are to be followed by a read-compare operation.
FAB$B_FSZ		Fixed control area size: unit record devices only.
FAB$W_IFI		Internal file identifier (must be 0).
FAB$L_NAM		NAM or NAML block address.
FAB$B_RAT		Record attributes; only for process permanent files with print file format.
FAB$B_RFM		Record format; unit record devices only.
FAB$B_RTV ¹		Retrieval window size.
FAB$B_SHR		File-sharing field.
	FAB$V_SHRDEL	Shared delete access.
	FAB$V_SHRGET	Shared read access.
	FAB$V_MSE ¹	Multistream access; also used with the FAB$V_MSE and FAB$V_GET bits to specify a read-only global buffer cache when global buffering is enabled.
	FAB$V_NIL	No shared access.
	FAB$V_SHRPUT	Shared write access.
	FAB$V_SHRUPD	Shared update access.
	FAB$V_UPI	Shared write access for block I/O (applies to sequential files only).
	FAB$V_NQL	No query record locking.
FAB$L_XAB ⁴		Extended attribute block address.
	XABITM	Item list XAB; see Chapter 12.

¹This field is not supported for DECnet for OpenVMS operations.
²This is the default value supplied by RMS.
³These fields must be supplied by the user.
⁴The appropriate XAB must be specified as input if you desire information about that particular XAB on output from the Open service.

Contents

Index

privacy and legal statement

4523PRO_028.HTML

OpenVMS usage:	cond_value
type:	longword
access:	write only
mechanism:	by value

OpenVMS usage:	rab
type:	longword (unsigned)
access:	modify
mechanism:	by reference

OpenVMS usage:	ast_procedure
type:	procedure value
access:	call without stack unwinding
mechanism:	by reference

OpenVMS usage:	fab
type:	longword (unsigned)
access:	modify
mechanism:	by reference