OpenVMS System Services Reference Manual

Document revision date: 15 July 2002

OpenVMS System Services Reference Manual

Contents

Index

Because the version number is 8-byte blank-filled, the buffer length field in the item descriptor should specify 8 (bytes).

SYI$_VECTOR_EMULATOR

Returns a byte, the low-order bit of which, when set, indicates the presence of the Vector Instruction Emulator facility (VVIEF) in the system.

SYI$_VP_MASK

Returns a longword mask, the bits of which, when set, indicate which processors in the system have vector coprocessors.

SYI$_VP_NUMBER

Returns an unsigned longword containing the number of vector processors in the system.

SYI$_XCPU

Returns the extended CPU processor type of the node.

You should obtain the general processor type value first by using the SYI$_CPU item code. For some of the general processor types, extended processor type information is provided by the item code, SYI$_XCPU. For other general processor types, the value returned by the SYI$_XCPU item code is currently undefined.

Because the processor type is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).

On VAX systems, the $PRDEF macro defines the following symbols for the extended processor types:

VAX
Processor
Type Symbol Extended
Processor
Type Extended
Processor
Symbol

PR$_SID_TYPUV MicroVAX II
VAXstation II PR$_XSID_UV_UV2

MicroVAX 2000
VAXstation 2000 PR$_XSID_UV_410

PR$_SID_TYPCV MicroVAX 3300, 3400, 3500, 3600, 3800, 3900 series PR$_XSID_CV_650

VAX 6000-200, 6000-300 series PR$_XSID_CV_9CC

VAXstation 3520, 3540 PR$_XSID_CV_60

VAXstation 3100 series PR$_XSID_CV_420

VAXft 3000 Model 310 PR$_XSID_CV_520

PR$_SID_TYP8NN VAX 8530 PRS$_XSID_N8500

VAX 8550 PRS$_XSID_N8550

VAX 8810 (8700) PRS$_XSID_N8700

VAX 8820-N (8800) PRS$_XSID_N8800

PR$_SID_TYPRV VAX 4000-300 PR$_XSID_RV_670

VAX 6000-400 series PR$_XSID_RV_9RR

VAX Processor Type Symbol	Extended Processor Type	Extended Processor Symbol
PR$_SID_TYPUV	MicroVAX II VAXstation II	PR$_XSID_UV_UV2
	MicroVAX 2000 VAXstation 2000	PR$_XSID_UV_410
PR$_SID_TYPCV	MicroVAX 3300, 3400, 3500, 3600, 3800, 3900 series	PR$_XSID_CV_650
	VAX 6000-200, 6000-300 series	PR$_XSID_CV_9CC
	VAXstation 3520, 3540	PR$_XSID_CV_60
	VAXstation 3100 series	PR$_XSID_CV_420
	VAXft 3000 Model 310	PR$_XSID_CV_520
PR$_SID_TYP8NN	VAX 8530	PRS$_XSID_N8500
	VAX 8550	PRS$_XSID_N8550
	VAX 8810 (8700)	PRS$_XSID_N8700
	VAX 8820-N (8800)	PRS$_XSID_N8800
PR$_SID_TYPRV	VAX 4000-300	PR$_XSID_RV_670
	VAX 6000-400 series	PR$_XSID_RV_9RR

SYI$_XSID

Returns processor-specific information. For the MicroVAX II system, this information is the contents of the system type register of the node. The system type register contains the full extended information used in determining the extended system type codes. For other processors, the data returned by SYI$_XSID is currently undefined.

Because the value of this register is a longword hexadecimal number, the buffer length field in the item descriptor should specify 4 (bytes).

SYI$_xxxx

Returns the current value of the system parameter named xxxx for the node.

The buffer must specify a longword into which $GETSYI writes the value of the specified system parameter. For a list and description of all system parameters, refer to the OpenVMS System Management Utilities Reference Manual.

Description

The Get Systemwide Information service returns information about the local system or about other systems in an OpenVMS Cluster configuration.
Required Access or Privileges

None
Required Quota

This service uses the process's AST limit quota (ASTLM).
Related Services

$ALLOC, $ASSIGN, $BRKTHRU, $BRKTHRUW, $CANCEL, $CREMBX, $DALLOC, $DASSGN, $DELMBX, $DEVICE_SCAN, $DISMOU, $GETDVI, $GETDVIW, $GETMSG, $GETQUI, $GETQUIW, $INIT_VOL, $MOUNT, $PUTMSG, $QIO, $QIOW, $SNDERR, $SNDJBC, $SNDJBCW, $SNDOPR

Condition Values Returned

SS$_NORMAL The service completed successfully.

SS$_ACCVIO The caller cannot read the item list, cannot write to the buffer specified by the buffer address field in an item descriptor, or cannot write to the return length address field in an item descriptor.

SS$_BADPARAM The item list contains an invalid item code.

SS$_EXASTLM The process has exceeded its AST limit quota.

SS$_NOMORENODE You requested a wildcard operation, and $GETSYI has returned information about all available nodes.

SS$_NOSUCHNODE The specified node does not exist or is not currently a member of the OpenVMS Cluster system.

SS$_UNREACHABLE Remote node is not currently reachable.

Condition Values Returned in the I/O Status Block

Same as those returned in R0.

Example


/* Defining __NEW_STARLET enables the program to benefit from better type checking for prototypes and structures provided by OpenVMS. / #define __NEW_STARLET 1 #include <efndef> / No Event Flag Event Flag / #include <iledef> / Item List Entry Definitions / #include <iosbdef> / I/O Status Block Structure Definition / #include <starlet> / Function Prototypes for System Services / #include <stdio> / C Standard I/O Functions / #include <string> / memset Prototype / #include <syidef> / $GETSYI Item Code Definitions / #define NUM_ILE 3 #define BUFFER_SIZE 20 / Macro to initialize a 32-bit item_list_3. / #define init_ile32(ile, length, code, bufaddr, retlen_addr) \ { (ile)->ile3$w_length = (length); \ (ile)->ile3$w_code = (code); \ (ile)->ile3$ps_bufaddr = (bufaddr); \ (ile)->ile3$ps_retlen_addr = (retlen_addr); } / Simple status checking macro. / #define bad_status(status) (((status) & 1) != 1) main () { char node_name [BUFFER_SIZE], version_string [BUFFER_SIZE]; int status; unsigned short node_name_length, version_string_length; ILE3 syi_ile [NUM_ILE]; IOSB iosb; / Zeroing the item list has the effect of creating the terminating entry. / memset (syi_ile, 0, ILE3$K_LENGTHNUM_ILE); /* Initialize the item list entries to fetch the operating system version and the node name. / init_ile32 ( &syi_ile [0], BUFFER_SIZE, SYI$_VERSION, version_string, &version_string_length); init_ile32 ( &syi_ile [1], BUFFER_SIZE, SYI$_NODENAME, node_name, &node_name_length); status = sys$getsyiw ( EFN$C_ENF, NULL, NULL, &syi_ile, &iosb, NULL, 0); if (bad_status (status)) return status; if (bad_status (iosb.iosb$w_status)) return iosb.iosb$w_status; / Zero terminate the strings before displaying them. */ version_string [version_string_length] = '\0'; node_name [node_name_length] = '\0'; printf ("Version: %s Node Name: %s\n", version_string, node_name); }

/*  Defining __NEW_STARLET enables the program to benefit from better type 
    checking for prototypes and structures provided by OpenVMS.             */ 
 
#define     __NEW_STARLET       1 
 
#include    <efndef>            /*  No Event Flag Event Flag  */ 
#include    <iledef>            /*  Item List Entry Definitions  */ 
#include    <iosbdef>           /*  I/O Status Block Structure Definition  */ 
#include    <starlet>           /*  Function Prototypes for System Services  */ 
#include    <stdio>             /*  C Standard I/O Functions  */ 
#include    <string>            /*  memset Prototype  */ 
#include    <syidef>            /*  $GETSYI Item Code Definitions  */ 
 
#define     NUM_ILE              3 
#define     BUFFER_SIZE         20 
 
 
/*  Macro to initialize a 32-bit item_list_3.                               */ 
 
#define init_ile32(ile, length, code, bufaddr, retlen_addr) \
{   (ile)->ile3$w_length = (length);           \
    (ile)->ile3$w_code = (code);         \
    (ile)->ile3$ps_bufaddr = (bufaddr); \
    (ile)->ile3$ps_retlen_addr = (retlen_addr); } 
 
 
/*  Simple status checking macro.                                           */ 
 
#define bad_status(status) (((status) & 1) != 1) 
 
main () 
{ 
char 
    node_name [BUFFER_SIZE], 
    version_string [BUFFER_SIZE]; 
 
int 
    status; 
 
unsigned short 
    node_name_length, 
    version_string_length; 
 
ILE3 
    syi_ile [NUM_ILE]; 
 
IOSB 
    iosb; 
 
 
/*  Zeroing the item list has the effect of creating the terminating entry. */ 
 
    memset (syi_ile, 0, ILE3$K_LENGTH*NUM_ILE); 
 
 
/*  Initialize the item list entries to fetch the operating system version 
    and the node name.                                                      */ 
 
    init_ile32 ( 
        &syi_ile [0], 
        BUFFER_SIZE, 
        SYI$_VERSION, 
        version_string, 
        &version_string_length); 
 
    init_ile32 ( 
        &syi_ile [1], 
        BUFFER_SIZE, 
        SYI$_NODENAME, 
        node_name, 
        &node_name_length); 
 
    status = sys$getsyiw ( 
        EFN$C_ENF, 
        NULL, 
        NULL, 
        &syi_ile, 
        &iosb, 
        NULL, 
        0); 
 
    if (bad_status (status)) return status; 
    if (bad_status (iosb.iosb$w_status)) return iosb.iosb$w_status; 
 
 
/*  Zero terminate the strings before displaying them.                      */ 
 
    version_string [version_string_length] = '\0'; 
    node_name [node_name_length] = '\0'; 
 
    printf ("Version:  %s    Node Name:  %s\n", 
        version_string, 
        node_name); 
}

This example C program demonstrates how to use $GETSYIW to obtain the operating system version number string and the node name.

$GETSYIW

Returns information about the local system or about other systems in a cluster.
The $GETSYIW service completes synchronously; that is, it returns to the caller with the requested information. For asynchronous completion, use the Get Systemwide Information ($GETSYI) service; $GETSYI returns to the caller after queuing the information request, without waiting for the information to be returned. In all other respects, these services are identical; refer to the documentation about $GETSYI for information about the $GETSYIW service.
For additional information about system service completion, refer to the Synchronize ($SYNCH) service.
On Alpha systems, this service accepts 64-bit addresses.

Format

SYS$GETSYIW [efn] ,[csidadr] ,[nodename] ,itmlst [,iosb] [,astadr] [,astprm]

C Prototype

int sys$getsyiw (unsigned int efn, unsigned int *csidadr, void *nodename, void *itmlst, struct _iosb *iosb, void (*astadr)(__unknown_params), int astprm);

You must specify either the csidadr or the nodename argument, but not both. For wildcard operations, however, you must use the csidadr argument.

$GETTIM

Returns the current system time in a 64-bit format.
On Alpha systems, this service accepts 64-bit addresses.

Format

SYS$GETTIM timadr

C Prototype

int sys$gettim (struct _generic_64 *timadr);

Argument

timadr

OpenVMS usage: date_time

type: quadword (unsigned)

access: write only

mechanism: by 32- or 64-bit reference (Alpha)

mechanism: by 32-bit reference (VAX)

The 32- or 64-bit address (on Alpha systems) or the 32-bit address (on VAX systems) of a quadword to receive the current time in 64-bit format.

Description

The Get Time service returns the current system time in 64-bit format. The quadword is the number of nanoseconds since November 17, 1858. Based upon system time initialization, all bits in the time quadword are valid.
On VAX systems, system time is updated every 10 milliseconds.
On Alpha systems, the frequency at which system time is updated varies, depending on the clock frequency of the Alpha processor, or approximately 1 millisecond.
Required Access or Privileges

None
Required Quota

None
Related Services

$ASCTIM, $BINTIM, $CANTIM, $CANWAK, $NUMTIM, $SCHDWK, $SETIME, $SETIMR
For additional information about the system time, refer to the OpenVMS System Manager's Manual.

Condition Values Returned

SS$_NORMAL The service completed successfully.

SS$_ACCVIO The quadword to receive the time cannot be written by the caller.

$GETUAI

Returns authorization information about a specified user.

Format

SYS$GETUAI [nullarg] ,[contxt] ,usrnam ,itmlst ,[nullarg] ,[nullarg] ,[nullarg]

C Prototype

int sys$getuai (unsigned int efn, unsigned int *contxt, void *usrnam, void *itmlst, struct _iosb *iosb, void (*astadr)(__unknown_params), int astprm);

Arguments

nullarg

OpenVMS usage: null_arg

type: longword (unsigned)

access: read only

mechanism: by value

Placeholding argument reserved to Compaq.
efn

OpenVMS usage: ef_number

type: longword (unsigned)

access: read only

mechanism: by value

Placeholding argument reserved to Compaq.
contxt

OpenVMS usage: longword

type: longword (unsigned)

access: modify

mechanism: by reference

An optional longword used to maintain an open channel to the authorization file. The contxt argument is the address of a longword to receive a $GETUAI context value. If the contxt argument is specified on the initial call, this longword should contain the value --1, and on subsequent calls, the value of the contxt argument from the previous call should be passed back in.
usrnam

OpenVMS usage: char_string

type: character-coded text string

access: read only

mechanism: by descriptor--fixed-length string descriptor

Name of the user about whom $GETUAI returns authorization information. The usrnam argument is the address of a descriptor pointing to a character text string containing the user name. The user name string can contain a maximum of 12 alphanumeric characters.
itmlst

OpenVMS usage: item_list_3

type: longword (unsigned)

access: read only

mechanism: by reference

Item list specifying which information from the specified user's user authorization file (UAF) record is to be returned. The itmlst argument is the address of a list of one or more item descriptors, each of which specifies an item code. The item list is terminated by an item code value of 0 or by a longword value of 0.
The following diagram depicts the structure of a single item descriptor:

The following table defines the item descriptor fields:

Descriptor Field Definition

Buffer length A word specifying the length (in bytes) of the buffer in which $GETUAI is to write the information. The length of the buffer varies, depending on the item code specified in the item code field of the item descriptor, and is given in the description of each item code. If the value of the buffer length field is too small, $GETUAI truncates the data.

Item code A word containing a user-supplied symbolic code specifying the item of information that $GETUAI is to return. The $UAIDEF macro defines these codes.

Buffer address A longword containing the user-supplied address of the buffer in which $GETUAI is to write the information.

Return length address A longword containing the user-supplied address of a word in which $GETUAI writes the length in bytes of the information it actually returned.

Descriptor Field	Definition
Buffer length	A word specifying the length (in bytes) of the buffer in which $GETUAI is to write the information. The length of the buffer varies, depending on the item code specified in the item code field of the item descriptor, and is given in the description of each item code. If the value of the buffer length field is too small, $GETUAI truncates the data.
Item code	A word containing a user-supplied symbolic code specifying the item of information that $GETUAI is to return. The $UAIDEF macro defines these codes.
Buffer address	A longword containing the user-supplied address of the buffer in which $GETUAI is to write the information.
Return length address	A longword containing the user-supplied address of a word in which $GETUAI writes the length in bytes of the information it actually returned.

The symbolic codes have the following format:

$UAI_code

See the Item Codes section for descriptions of the various $GETUAI item codes.

iosb

OpenVMS usage:	io_status_block
type:	quadword (unsigned)
access:	write only
mechanism:	by reference

Placeholding argument reserved to Compaq.

astadr

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

Placeholding argument reserved to Compaq.

astprm

OpenVMS usage:	user_arg
type:	longword (unsigned)
access:	read only
mechanism:	by value

Placeholding argument reserved to Compaq.

Item Codes

UAI$_ACCOUNT
Returns, as a blank-filled 32-character string, the account name of the user.
An account name can include up to 8 characters. Because the account name is a blank-filled string, however, the buffer length field of the item descriptor should specify 32 (bytes).
UAI$_ASTLM
Returns the AST queue limit.
Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).
UAI$_BATCH_ACCESS_P
Returns, as a 3-byte value, the range of times during which batch access is permitted for primary days. Each bit set represents a 1-hour period, from bit 0 as midnight to 1 a.m. to bit 23 as 11 p.m. to midnight.
The buffer length field in the item descriptor should specify 3 (bytes).
UAI$_BATCH_ACCESS_S
Returns, as a 3-byte value, the range of times during which batch access is permitted for secondary days. Each bit set represents a 1-hour period, from bit 0 as midnight to 1 a.m. to bit 23 as 11 p.m. to midnight.
The buffer length field in the item descriptor should specify 3 (bytes).
UAI$_BIOLM
Returns the buffered I/O count.
Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).
UAI$_BYTLM
Returns the buffered I/O byte limit.
Because the buffered I/O byte limit is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).
UAI$_CLITABLES
Returns, as a character string, the name of the user-defined CLI table for the account, if any.
Because the CLI table name can include up to 31 characters in addition to a size-byte prefix, the buffer length field of the item descriptor should specify 32 (bytes).
UAI$_CPUTIM
Returns the maximum CPU time limit (per session) for the process in 10-millisecond units.
Because the maximum CPU time limit is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).
UAI$_DEFCLI
Returns, as an RMS file name component, the name of the command language interpreter used to execute the specified batch job. The file specification returned assumes the device name and directory SYS$SYSTEM and the file type .EXE.
Because a file name can include up to 31 characters in addition to a size-byte prefix, the buffer length field in the item descriptor should specify 32 (bytes).
UAI$_DEFDEV
Returns, as a 1- to 31-character string, the name of the default device.
Because the device name string can include up to 31 characters in addition to a size-byte prefix, the buffer length field in the item descriptor should specify 32 (bytes).
UAI$_DEFDIR
Returns, as a 1- to 63-character string, the name of the default directory.
Because the directory name string can include up to 63 characters in addition to a size-byte prefix, the buffer length field in the item descriptor should specify 64 (bytes).
UAI$_DEF_PRIV
Returns the default privileges for the user.
Because the default privileges are returned as a quadword value, the buffer length field in the item descriptor should specify 8 (bytes).
UAI$_DFWSCNT
Returns the default working set size in pages (on VAX systems) or pagelets (on Alpha systems).
Because the default working set size is a longword decimal number, the buffer length field in the item descriptor should specify 4 (bytes).
UAI$_DIOLM
Returns the direct I/O count limit.
Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).
UAI$_DIALUP_ACCESS_P
Returns, as a 3-byte value, the range of times during which dialup access is permitted for primary days. Each bit set represents a 1-hour period, from bit 0 as midnight to 1 a.m. to bit 23 as 11 p.m. to midnight. For each hour the bit is set to 0, access is allowed. For each hour the bit is set to 1, access is denied.
The buffer length field in the item descriptor should specify 3 (bytes).
UAI$_DIALUP_ACCESS_S
Returns, as a 3-byte value, the range of times during which dialup access is permitted for secondary days. Each bit set represents a 1-hour period, from bit 0 as midnight to 1 a.m. to bit 23 as 11 p.m. to midnight. For each hour the bit is set to 0, access is allowed. For each hour the bit is set to 1, access is denied.
The buffer length field in the item descriptor should specify 3 (bytes).
UAI$_ENCRYPT
Returns one of the values shown in the following table, identifying the encryption algorithm for the primary password.
Because the encryption algorithm is a byte in length, the buffer length field in the item descriptor should specify 1 (byte).

Symbolic Name Description

UAI$C_AD_II Uses a CRC algorithm and returns a longword hash value. It was used in VAX VMS releases prior to Version 2.0.

UAI$C_PURDY Uses a Purdy algorithm over salted input. It expects a blank-padded user name and returns a quadword hash value. This algorithm was used during VAX VMS Version 2.0 field test.

UAI$C_PURDY_V Uses the Purdy algorithm over salted input. It expects a variable-length user name and returns a quadword hash value. This algorithm was used in VMS releases prior to Version 5.4.

UAI$C_PURDY_S Uses the Purdy algorithm over salted input. It expects a variable-length user name and returns a quadword hash value. This is the current algorithm that the operating system uses for all new password changes.

UAI$_ENCRYPT2
Returns one of the following values identifying the encryption algorithm for the secondary password:

UAI$C_AD_II
UAI$C_PURDY
UAI$C_PURDY_V
UAI$C_PURDY_S

Because the encryption algorithm is a byte in length, the buffer length field in the item descriptor should specify 1 byte.
UAI$_ENQLM
Returns the lock queue limit.
Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).
UAI$_EXPIRATION
Returns, as a quadword absolute time value, the expiration date and time of the account.
Because the absolute time value is a quadword in length, the buffer length field in the item descriptor should specify 8 (bytes).
UAI$_FILLM
Returns the open file limit.
Because this decimal number is a word in length, the buffer length field in the item descriptor should specify 2 (bytes).
UAI$_FLAGS
Returns, as a longword bit vector, the various login flags set for the user.
Each flag is represented by a bit. The $UAIDEF macro defines the following symbolic names for these flags:

Symbolic Name Description

UAI$V_AUDIT All actions are audited.

UAI$V_AUTOLOGIN User can only log in to terminals defined by the Automatic Login facility (ALF).

UAI$V_CAPTIVE User is restricted to captive account.

UAI$V_DEFCLI User is restricted to default command interpreter.

UAI$V_DISACNT User account is disabled. Same as /FLAG = DISUSER qualifier in AUTHORIZE.

UAI$V_DISCTLY User cannot use Ctrl/Y.

UAI$V_DISFORCE_PWD_CHANGE User will not be forced to change expired passwords at login.

UAI$V_DISIMAGE User cannot issue the RUN or MCR commands or use the foreign command mechanism in DCL.

UAI$V_DISMAIL Announcement of new mail is suppressed.

UAI$V_DISPWDDIC Automatic checking of user-selected passwords against the system dictionary is disabled.

UAI$V_DISPWDHIS Automatic checking of user-selected passwords against previously used passwords is disabled.

UAI$V_DISRECONNECT User cannot reconnect to existing processes.

UAI$V_DISREPORT User will not receive last login messages.

UAI$V_DISWELCOME User will not receive the login welcome message.

UAI$V_EXTAUTH User is considered to be externally authenticated by their external user ID and password, and not by the SYSUAF user ID and password. The SYSUAF record is still used for checking login restrictions and quotas and for creating the user's OpenVMS process profile.

UAI$V_GENPWD User is required to use generated passwords.

UAI$V_LOCKPWD SET PASSWORD command is disabled.

UAI$V_MIGRATEPWD User's SYSUAF password has been set using AUTHORIZE or SYS$SETUAI and is likely to be inconsistent with the user's external user password. If password migration is enabled, the system will attempt to update the external authentication service the next time the user attempts a login.

UAI$V_NOMAIL Mail delivery to user is disabled.

UAI$V_PWD_EXPIRED Primary password is expired.

UAI$V_PWD2_EXPIRED Secondary password is expired.

UAI$V_RESTRICTED User is limited to operating under a restricted account. (Refer to the OpenVMS Guide to System Security for a description of restricted and captive accounts.)

UAI$_JTQUOTA
Returns the initial byte quota with which the jobwide logical name table is to be created.

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SS$_NORMAL	The service completed successfully.
SS$_ACCVIO	The caller cannot read the item list, cannot write to the buffer specified by the buffer address field in an item descriptor, or cannot write to the return length address field in an item descriptor.
SS$_BADPARAM	The item list contains an invalid item code.
SS$_EXASTLM	The process has exceeded its AST limit quota.
SS$_NOMORENODE	You requested a wildcard operation, and $GETSYI has returned information about all available nodes.
SS$_NOSUCHNODE	The specified node does not exist or is not currently a member of the OpenVMS Cluster system.
SS$_UNREACHABLE	Remote node is not currently reachable.

OpenVMS usage:	date_time
type:	quadword (unsigned)
access:	write only
mechanism:	by 32- or 64-bit reference (Alpha)
mechanism:	by 32-bit reference (VAX)

OpenVMS usage:	null_arg
type:	longword (unsigned)
access:	read only
mechanism:	by value

OpenVMS usage:	ef_number
type:	longword (unsigned)
access:	read only
mechanism:	by value

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

OpenVMS usage:	char_string
type:	character-coded text string
access:	read only
mechanism:	by descriptor--fixed-length string descriptor

OpenVMS usage:	item_list_3
type:	longword (unsigned)
access:	read only
mechanism:	by reference

Symbolic Name	Description
UAI$C_AD_II	Uses a CRC algorithm and returns a longword hash value. It was used in VAX VMS releases prior to Version 2.0.
UAI$C_PURDY	Uses a Purdy algorithm over salted input. It expects a blank-padded user name and returns a quadword hash value. This algorithm was used during VAX VMS Version 2.0 field test.
UAI$C_PURDY_V	Uses the Purdy algorithm over salted input. It expects a variable-length user name and returns a quadword hash value. This algorithm was used in VMS releases prior to Version 5.4.
UAI$C_PURDY_S	Uses the Purdy algorithm over salted input. It expects a variable-length user name and returns a quadword hash value. This is the current algorithm that the operating system uses for all new password changes.

Symbolic Name	Description
UAI$V_AUDIT	All actions are audited.
UAI$V_AUTOLOGIN	User can only log in to terminals defined by the Automatic Login facility (ALF).
UAI$V_CAPTIVE	User is restricted to captive account.
UAI$V_DEFCLI	User is restricted to default command interpreter.
UAI$V_DISACNT	User account is disabled. Same as /FLAG = DISUSER qualifier in AUTHORIZE.
UAI$V_DISCTLY	User cannot use Ctrl/Y.
UAI$V_DISFORCE_PWD_CHANGE	User will not be forced to change expired passwords at login.
UAI$V_DISIMAGE	User cannot issue the RUN or MCR commands or use the foreign command mechanism in DCL.
UAI$V_DISMAIL	Announcement of new mail is suppressed.
UAI$V_DISPWDDIC	Automatic checking of user-selected passwords against the system dictionary is disabled.
UAI$V_DISPWDHIS	Automatic checking of user-selected passwords against previously used passwords is disabled.
UAI$V_DISRECONNECT	User cannot reconnect to existing processes.
UAI$V_DISREPORT	User will not receive last login messages.
UAI$V_DISWELCOME	User will not receive the login welcome message.
UAI$V_EXTAUTH	User is considered to be externally authenticated by their external user ID and password, and not by the SYSUAF user ID and password. The SYSUAF record is still used for checking login restrictions and quotas and for creating the user's OpenVMS process profile.
UAI$V_GENPWD	User is required to use generated passwords.
UAI$V_LOCKPWD	SET PASSWORD command is disabled.
UAI$V_MIGRATEPWD	User's SYSUAF password has been set using AUTHORIZE or SYS$SETUAI and is likely to be inconsistent with the user's external user password. If password migration is enabled, the system will attempt to update the external authentication service the next time the user attempts a login.
UAI$V_NOMAIL	Mail delivery to user is disabled.
UAI$V_PWD_EXPIRED	Primary password is expired.
UAI$V_PWD2_EXPIRED	Secondary password is expired.
UAI$V_RESTRICTED	User is limited to operating under a restricted account. (Refer to the OpenVMS Guide to System Security for a description of restricted and captive accounts.)