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| Updated: 11 December 1998 |
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| Updated: 11 December 1998 |
OpenVMS System Services Reference Manual
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On Alpha systems, deletes a virtual region within the process's address space, including all created virtual addresses within the region.This service accepts 64-bit addresses.
SYS$DELETE_REGION_64 region_id_64 ,acmode ,return_va_64 ,return_length_64
nt sys$delete_region_64 (struct _generic_64 *region_id_64, unsigned int acmode, void *(*(return_va_64)), unsigned __int64 *return_length_64);
region_id_64
OpenVMS usage: region identifier type: quadword (unsigned) access: read only mechanism: by 32- or 64-bit reference
The region ID associated with the region to be deleted. The region ID specified must be one returned by the $CREATE_REGION_64 service. You cannot specify VA$C_P0, VA$C_P1, or VA$C_P2.acmode
OpenVMS usage: access_mode type: longword (unsigned) access: read only mechanism: by value
Access mode associated with the call to $DELETE_REGION_64. The acmode argument is a longword containing the access mode.The $PSLDEF macro in STARLET.MLB and the file PSLDEF.H in SYS$STARLET_C.TLB define the following symbols and their values for the four access modes:
Value Symbolic Name Access Mode 0 PSL$C_KERNEL Kernel 1 PSL$C_EXEC Executive 2 PSL$C_SUPER Supervisor 3 PSL$C_USER User The most privileged access mode used is the access mode of the caller. The caller can delete pages only if those pages are owned by an access mode equal to or less privileged than the access mode of the caller.
Once all pages are deleted within the region, the region can be deleted only if the region is owned by an access mode equal to or less privileged than the access mode of the caller.
return_va_64
OpenVMS usage: address type: quadword address access: write only mechanism: by 32- or 64-bit reference
The lowest process virtual address of the pages that $DELETE_REGION_64 has successfully deleted. The return_va_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the virtual address of the first page deleted. Virtual addresses are deleted from low address to high address, regardless of the direction in which virtual addresses expand for that region.return_length_64
OpenVMS usage: byte count type: quadword (unsigned) access: write only mechanism: by 32- or 64-bit reference
The length of the virtual address range that $DELETE_REGION_64 has successfully deleted. The return_length_64 argument is the 32- or 64-bit virtual address of a naturally aligned quadword into which the service returns the length of the deleted virtual address range in bytes.
The Delete a Virtual Region service is a kernel mode service that can be called from any mode. The Delete a Virtual Region service deletes the user-defined region specified by the region_id_64 argument. You cannot delete the program (P0), control (P1), or 64-bit program (P2) regions.The Delete a Virtual Region service also deletes all created virtual addresses within the specified region before deleting the region itself.
If a page within the region is owned by an access mode more privileged than the access mode of the caller, the condition value SS$_PAGOWNVIO is returned. The return_va_64 and return_length_64 arguments contain the virtual address range that was actually deleted by $DELETE_REGION_64. In this case, the region is not deleted because there are still some pages mapped within the region.
To delete a virtual region, the caller's access mode must be at least as privileged as the access mode associated with the region. If the caller is not privileged enough to delete the region, the condition value SS$_REGOWNVIO is returned only if all pages were successfully deleted from within the region.
If the condition value SS$_ACCVIO is returned by this service, a value cannot be returned in the memory locations pointed to by the return_va_64 and return_length_64 arguments. If the condition value SS$_ACCVIO is returned, no pages have been deleted, and the region has not been deleted.
If an error other than SS$_ACCVIO occurs, the returned address and returned length indicate the pages that were successfully deleted before the error occurred. If no pages were deleted, the return_va_64 argument contains the value --1 and a value cannot be returned in the memory location pointed to by the return_length_64 argument.
None
None
$CREATE_REGION_64, $CRETVA_64, $CRMPSC_FILE_64, $CRMPSC_GFILE_64, $CRMPSC_GPFILE_64, $CRMPSC_GPFN_64, $CRMPSC_PFN_64, $DELTVA_64, $EXPREG_64, $GET_REGION_INFO, $MGBLSC_64, $MGBLSC_GPFN_64
SS$_NORMAL Successful completion. All pages within the region have been deleted as well as the region itself. SS$_ACCVIO The return_va_64 argument or the return_length_64 argument cannot be written by the caller. SS$_IVREGID Invalid region ID specified. This condition value is returned if P0, P1, or P2 space is specified because these regions cannot be deleted, or if no region exists for the specified ID. SS$_REGOWNVIO The region is owned by a more privileged access mode than the access mode of the caller. All pages within the region have been deleted; however, the region has not been deleted. SS$_PAGOWNVIO A page within the specified region is owned by a more privileged access mode than the access mode of the caller. SS$_VA_IN_USE The existing underlying page cannot be deleted because it is associated with a buffer object.
Deletes all logical names with the specified name at the specified access mode or outer access mode, or it deletes all the logical names with the specified access mode or outer access mode in a specified table.On Alpha systems, this service accepts 64-bit addresses.
SYS$DELLNM tabnam ,[lognam] ,[acmode]
int sys$dellnm (void *tabnam, void *lognam, unsigned char *acmode);
tabnam
OpenVMS usage: logical_name type: character-coded text string access: read only mechanism: by 32- or 64-bit descriptor--fixed-length string descriptor (Alpha) mechanism: by 32-bit descriptor--fixed-length string descriptor (VAX)
Name of a logical name table or a list of tables to be searched for the logical name to be deleted. The tabnam argument is the 32-bit address (on VAX systems) or the 32- or 64-bit address (on Alpha systems) of a descriptor that points to the table name. This argument is required.If tabnam is not the name of a logical name table, it is assumed to be a logical name and is translated iteratively until either the name of a logical name table is found or the number of translations allowed by the system has been performed.
If tabnam translates to the name of a list of tables, $DELLNM does the following:
- If you specify the lognam argument, $DELLNM searches (in order) each table in the list until it finds the first table that contains the specified logical name. If the logical name is at the specified access mode, $DELLNM then deletes occurrences of the logical name at the specified access mode and at outer access modes within the table.
- If you do not specify the lognam argument, $DELLNM deletes all of the logical names at the specified access mode or at outer access modes from the first table in the list whose access mode is equal to or less privileged than the caller's access mode.
lognam
OpenVMS usage: logical_name type: character-coded text string access: read only mechanism: by 32- or 64-bit descriptor--fixed-length string descriptor (Alpha) mechanism: by 32-bit descriptor--fixed-length string descriptor (VAX)
Logical name to be deleted. The lognam argument is the 32-bit address (on VAX systems) or the 32- or 64-bit address (on Alpha systems) of a descriptor that points to the logical name string.acmode
OpenVMS usage: access_mode type: byte (unsigned) access: read only mechanism: by 32- or 64-bit reference (Alpha) mechanism: by 32-bit reference (VAX)
Access mode to be used in the delete operation. The acmode argument is the 32-bit address (on VAX systems) or the 32- or 64-bit address (on Alpha systems) of a byte containing this access mode. The $PSLDEF macro defines symbolic names for the four access modes.You determine the access mode actually used in the delete operation by maximizing the access mode of the caller with the access mode specified by the acmode argument; that is, the less privileged of the two is used.
However, if you have SYSNAM privilege, the delete operation is executed at the specified access mode regardless of the caller's access mode.
If you omit this argument or specify it as 0, the access mode of the caller is used in the delete operation. The access mode used in the delete operation determines which tables are used and which names are deleted.
The Delete Logical Name service deletes all logical names with the specified name at the specified access mode or outer access mode, or it deletes all the logical names with the specified access mode or outer access mode in a specified table. If any logical names being deleted are also the names of logical name tables, then all of the logical names contained within those tables and all of their subtables are also deleted.Depending on the operation, the calling process might need one of the following access or rights privileges to use $DELLNM:
- Write and delete access to the logical name table to delete a logical name
- Write access to the directory table that contains the table name, or SYSPRV privilege, to delete a shareable logical name table
- SYSNAM privilege to delete a logical name or table at an inner access mode
- GRPNAM or SYSPRV privilege to delete a logical name from a group table
- SYSNAM or SYSPRV privilege to delete a logical name from a system table
None
$CRELNM, $CRELNT, $TRNLNM
SS$_NORMAL The service completed successfully. SS$_ACCVIO The service cannot access the locations specified by one or more arguments. SS$_BADPARAM One or more arguments have an invalid value, or a logical name table name was not specified. SS$_INSFMEM There is insufficient dynamic memory to build a message describing the deletion of a clusterwide name. SS$_IVLOGNAM The lognam argument specifies a string whose length is not in the required range of 1 through 255 characters. SS$_IVLOGTAB The tabnam argument does not specify a logical name table. SS$_NOLOGNAM The specified logical name table does not exist, or a logical name with an access mode equal to or less privileged than the caller's access mode does not exist in the logical name table. SS$_NOLOGTAB The specified logical name table does not exist. SS$_NOPRIV The caller lacks the necessary privilege to delete the logical name. SS$_TOOMANYLNAM The logical name translation of the table name exceeded the allowable depth (10 translations).
Marks a permanent mailbox for deletion.
SYS$DELMBX chan
int sys$delmbx (unsigned short int chan);
chan
OpenVMS usage: channel type: word (unsigned) access: read only mechanism: by value
Number of the channel assigned to the mailbox that is to be deleted. The chan argument is a word containing this number.
The Delete Mailbox service marks a permanent mailbox for deletion. The actual deletion of the mailbox and of its associated logical name assignment occur when no more I/O channels are assigned to the mailbox.You can delete a mailbox only from an access mode equal to or more privileged than the access mode from which the mailbox channel was assigned. Temporary mailboxes are automatically deleted when their reference count goes to 0.
The $DELMBX service does not deassign the channel assigned by the caller, if any. The caller must deassign the channel with the Deassign I/O Channel ($DASSGN) service.
You need PRMMBX privilege to delete a permanent mailbox.
None
$ALLOC, $ASSIGN, $BRKTHRU, $BRKTHRUW, $CANCEL, $CREMBX, $DALLOC, $DASSGN, $DEVICE_SCAN, $DISMOU, $GETDVI, $GETDVIW, $GETMSG, $GETQUI, $GETQUIW, $INIT_VOL, $MOUNT, $PUTMSG, $QIO, $QIOW, $SNDERR, $SNDJBC, $SNDJBCW, $SNDOPR
SS$_NORMAL The service completed successfully. SS$_DEVNOTMBX The specified channel is not assigned to a mailbox. SS$_IVCHAN You specified an invalid channel number, that is, a channel number of 0 or a number larger than the number of channels available. SS$_NOPRIV The specified channel is not assigned to a device; the process does not have the privilege to delete a permanent mailbox or a mailbox in memory shared by multiple processors; or the access mode of the caller is less privileged than the access mode from which the channel was assigned.
Allows a process to delete itself or another process.
SYS$DELPRC [pidadr] ,[prcnam]
int sys$delprc (unsigned int *pidadr, void *prcnam);
pidadr
OpenVMS usage: process_id type: longword (unsigned) access: modify mechanism: by reference
Process identification (PID) of the process to be deleted. The pidadr argument is the address of a longword that contains the PID. The pidadr argument can refer to a process running on the local node or a process running on another node in the OpenVMS Cluster system.You must specify the pidadr argument to delete processes in other UIC groups.
prcnam
OpenVMS usage: process_name type: character-coded text string access: read only mechanism: by descriptor--fixed-length string descriptor
Process name of the process to be deleted. The prcnam is the address of a character string descriptor pointing to the process name string. A process running on the local node can be identified with a 1- to 15-character string. To identify a process on a particular node on a cluster, specify the full process name, which includes the node name as well as the process name. The full process name can contain up to 23 characters.You use the prcnam argument to delete only processes in the same UIC group as the calling process, because process names are unique to UIC groups, and the operating system uses the UIC group number of the calling process to interpret the process name specified by the prcnam argument.
You must use the pidadr argument to delete processes in other groups.
The Delete Process service allows a process to delete itself or another process. If you specify neither the pidadr nor the prcnam argument, $DELPRC deletes the calling process; control is not returned. If the longword at address pidadr is 0, the PID of the target process is returned. This system service requires system dynamic memory.When you delete a process or subprocess, a termination message is sent to its creating process, provided the mailbox to receive the message still exists and the creating process has access to the mailbox. The termination message is sent before the final rundown is initiated; thus, the creating process might receive the message before the process deletion is complete.
Due to the complexity of the required rundown operations, a significant time interval occurs between a delete request and the actual deletion of the process. However, the $DELPRC service returns to the caller immediately after initiating the rundown operation.
If you issue subsequent delete requests for a process currently being deleted, the requests return immediately with a successful completion status.
Depending on the operation, the calling process might need one of the following privileges to use $DELPRC:
- GROUP privilege to delete processes in the same group that do not have the same UIC
- WORLD privilege to delete any process in the system
None. Deductible resource quotas granted to subprocesses are returned to the creating process when the subprocesses are deleted.
$CANEXH, $CREPRC, $DCLEXH, $EXIT, $FORCEX, $GETJPI, $GETJPIW, $HIBER, $PROCESS_SCAN, $RESUME, $SETPRI, $SETPRN, $SETPRV, $SETRWM, $SUSPND, $WAKE
SS$_NORMAL The service completed successfully. SS$_ACCVIO The process name string or string descriptor cannot be read by the caller, or the process identification cannot be written by the caller. SS$_INCOMPAT The remote node is running an incompatible version of the operating system. SS$_INSFMEM The system dynamic memory is insufficient for completing the operation. SS$_NONEXPR The specified process does not exist, or an invalid process identification was specified. SS$_NOPRIV The caller does not have the privilege to delete the specified process. SS$_NOSUCHNODE The process name refers to a node that is not currently recognized as part of the cluster. SS$_REMRSRC The remote node has insufficient resources to respond to the request. (Bring this error to the attention of your system manager.) SS$_UNREACHABLE The remote node is a member of the cluster but is not accepting requests. (This is normal for a brief period early in the system boot process.)
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