935 lines
30 KiB
C
935 lines
30 KiB
C
/*
|
||
* HrPrinterEntry.c v0.10
|
||
* Generated in conjunction with Management Factory scripts:
|
||
* script version: SNMPv1, 0.16, Apr 25, 1996
|
||
* project: D:\TEMP\EXAMPLE\HOSTMIB
|
||
****************************************************************************
|
||
* *
|
||
* (C) Copyright 1995 DIGITAL EQUIPMENT CORPORATION *
|
||
* *
|
||
* This software is an unpublished work protected under the *
|
||
* the copyright laws of the United States of America, all *
|
||
* rights reserved. *
|
||
* *
|
||
* In the event this software is licensed for use by the United *
|
||
* States Government, all use, duplication or disclosure by the *
|
||
* United States Government is subject to restrictions as set *
|
||
* forth in either subparagraph (c)(1)(ii) of the Rights in *
|
||
* Technical Data And Computer Software Clause at DFARS *
|
||
* 252.227-7013, or the Commercial Computer Software Restricted *
|
||
* Rights Clause at FAR 52.221-19, whichever is applicable. *
|
||
* *
|
||
****************************************************************************
|
||
*
|
||
* Facility:
|
||
*
|
||
* Windows NT SNMP Extension Agent
|
||
*
|
||
* Abstract:
|
||
*
|
||
* This module contains the code for dealing with the get, set, and
|
||
* instance name routines for the HrPrinterEntry. Actual instrumentation code is
|
||
* supplied by the developer.
|
||
*
|
||
* Functions:
|
||
*
|
||
* A get and set routine for each attribute in the class.
|
||
*
|
||
* The routines for instances within the class.
|
||
*
|
||
* Author:
|
||
*
|
||
* D. D. Burns @ Webenable Inc
|
||
*
|
||
* Revision History:
|
||
*
|
||
* V1.00 - 04/27/97 D. D. Burns Genned: Thu Nov 07 16:42:50 1996
|
||
*
|
||
*/
|
||
|
||
|
||
#include <windows.h>
|
||
#include <malloc.h>
|
||
|
||
#include <snmp.h>
|
||
|
||
#include "mib.h"
|
||
#include "smint.h"
|
||
#include "hostmsmi.h"
|
||
#include "user.h" /* Developer supplied include file */
|
||
#include "HMCACHE.H" /* Cache-related definitions */
|
||
#include "HRDEVENT.H" /* HrDevice Table related definitions */
|
||
#include <winspool.h> /* Needed to acquire printer-status*/
|
||
|
||
|
||
|
||
/*
|
||
* GetHrPrinterStatus
|
||
* The current status of this printer device.
|
||
*
|
||
* Gets the value for HrPrinterStatus.
|
||
*
|
||
* Arguments:
|
||
*
|
||
* outvalue address to return variable value
|
||
* accesss Reserved for future security use
|
||
* instance address of instance name as ordered native
|
||
* data type(s)
|
||
*
|
||
* Return Codes:
|
||
*
|
||
* Standard PDU error codes.
|
||
*
|
||
* SNMP_ERRORSTATUS_NOERROR Successful get
|
||
* SNMP_ERRORSTATUS_GENERR Catch-all failure code
|
||
* mibtget.c v0.10
|
||
*
|
||
| =============== From WebEnable Design Spec Rev 3 04/11/97==================
|
||
| hrPrinterStatus
|
||
|
|
||
| ACCESS SYNTAX
|
||
| read-only INTEGER {other(1),unknown(2),idle(3),printing(4),warmup(5)}
|
||
|
|
||
| "The current status of this printer device. When in the idle(1), printing(2),
|
||
| or warmup(3) state, the corresponding hrDeviceStatus should be running(2) or
|
||
| warning(3). When in the unknown state, the corresponding hrDeviceStatus
|
||
| should be unknown(1)."
|
||
|
|
||
| DISCUSSION:
|
||
|
|
||
| <POA-14> The actual status and error state of a hardware printer is deeply
|
||
| buried with respect to the application level. Given that we can acquire
|
||
| the name of the printer driver for a printer, some input on how best to
|
||
| report the hardware status and error state would be appreciated.
|
||
|
|
||
| LIMITED RESOLUTION >>>>>>>>
|
||
| <POA-14> We report logical printers as though they were hardware printers.
|
||
| This results in certain "undercount" and "overcount" situations when using
|
||
| Host MIB values for inventory purposes. For status purposes, the status
|
||
| of the logical printers is returned.
|
||
| LIMITED RESOLUTION >>>>>>>>
|
||
|
|
||
|============================================================================
|
||
| 1.3.6.1.2.1.25.3.5.1.1.<instance>
|
||
| | | | |
|
||
| | | | *hrPrinterStatus
|
||
| | | *hrPrinterEntry
|
||
| | *hrPrinterTable
|
||
| *-hrDevice
|
||
*/
|
||
|
||
UINT
|
||
GetHrPrinterStatus(
|
||
OUT INThrPrinterStatus *outvalue ,
|
||
IN Access_Credential *access ,
|
||
IN InstanceName *instance )
|
||
|
||
{
|
||
ULONG index; /* As fetched from instance structure */
|
||
CACHEROW *row; /* Row entry fetched from cache */
|
||
|
||
|
||
/*
|
||
| Grab the instance information
|
||
*/
|
||
index = GET_INSTANCE(0);
|
||
|
||
/*
|
||
| Use it to find the right entry in the cache
|
||
*/
|
||
if ((row = FindTableRow(index, &hrDevice_cache)) == NULL) {
|
||
return SNMP_ERRORSTATUS_GENERR;
|
||
}
|
||
|
||
/*
|
||
| Ok, here's the skinny: Just about all the status information that can
|
||
| be acquired about a printer under NT is acquired by
|
||
| "COMPUTE_hrPrinter_status()" that was written to service the need of
|
||
| reporting general status for printer devices out of "hrDeviceStatus".
|
||
|
|
||
| Since we can't gather any more information reliably than this function
|
||
| does, we simply call it and map the return codes it provides as values
|
||
| for "hrDeviceStatus" into codes appropriate for this attribute variable.
|
||
|
|
||
*/
|
||
if (COMPUTE_hrPrinter_status(row, (UINT *) outvalue) != TRUE) {
|
||
return SNMP_ERRORSTATUS_GENERR;
|
||
}
|
||
|
||
/* We get back:
|
||
| "unknown" = 1 If we can't open the printer at all.
|
||
|
|
||
| "running" = 2 If we can open the printer and no status is
|
||
| showing on it.
|
||
| "warning" = 3 If we can open the printer but PAUSED or
|
||
| PENDING_DELETION is showing on it.
|
||
*/
|
||
switch (*outvalue) {
|
||
|
||
case 1: // "unknown" for hrDeviceStatus
|
||
*outvalue = 2; // goes to-> "unknown" for hrPrinterStatus
|
||
break;
|
||
|
||
|
||
case 2: // "running" for hrDeviceStatus
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||
case 3: // "warning" for hrDeviceStatus
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||
default:
|
||
*outvalue = 1; // goes to-> "other" for hrPrinterStatus
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||
break;
|
||
}
|
||
|
||
return SNMP_ERRORSTATUS_NOERROR ;
|
||
|
||
} /* end of GetHrPrinterStatus() */
|
||
|
||
|
||
/*
|
||
* GetHrPrinterDetectedErrorState
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||
* The error conditions as detected by the printer.
|
||
*
|
||
* Gets the value for HrPrinterDetectedErrorState.
|
||
*
|
||
* Arguments:
|
||
*
|
||
* outvalue address to return variable value
|
||
* accesss Reserved for future security use
|
||
* instance address of instance name as ordered native
|
||
* data type(s)
|
||
*
|
||
* Return Codes:
|
||
*
|
||
* Standard PDU error codes.
|
||
*
|
||
* SNMP_ERRORSTATUS_NOERROR Successful get
|
||
* SNMP_ERRORSTATUS_GENERR Catch-all failure code
|
||
* mibtget.c v0.10
|
||
*
|
||
| =============== From WebEnable Design Spec Rev 3 04/11/97==================
|
||
| hrPrinterDetectedErrorState
|
||
|
|
||
| ACCESS SYNTAX
|
||
| read-only OCTET STRING
|
||
|
|
||
| "This object represents any error conditions detected by the printer. The
|
||
| error conditions are encoded as bits in an octet string, with the following
|
||
| definitions:
|
||
|
|
||
| Condition Bit # hrDeviceStatus
|
||
|
|
||
| lowPaper 0 warning(3)
|
||
| noPaper 1 down(5)
|
||
| lowToner 2 warning(3)
|
||
| noToner 3 down(5)
|
||
| doorOpen 4 down(5)
|
||
| jammed 5 down(5)
|
||
| offline 6 down(5)
|
||
| serviceRequested 7 warning(3)
|
||
|
|
||
| If multiple conditions are currently detected and the hrDeviceStatus would not
|
||
| otherwise be unknown(1) or testing(4), the hrDeviceStatus shall correspond to
|
||
| the worst state of those indicated, where down(5) is worse than warning(3)
|
||
| which is worse than running(2).
|
||
|
|
||
| Bits are numbered starting with the most significant bit of the first byte
|
||
| being bit 0, the least significant bit of the first byte being bit 7, the most
|
||
| significant bit of the second byte being bit 8, and so on. A one bit encodes
|
||
| that the condition was detected, while a zero bit encodes that the condition
|
||
| was not detected.
|
||
|
|
||
| This object is useful for alerting an operator to specific warning or error
|
||
| conditions that may occur, especially those requiring human intervention."
|
||
|
|
||
| DISCUSSION:
|
||
|
|
||
| (See discussion above for "hrPrinterStatus").
|
||
|
|
||
|============================================================================
|
||
| 1.3.6.1.2.1.25.3.5.1.2.<instance>
|
||
| | | | |
|
||
| | | | *hrPrinterDetectedErrorState
|
||
| | | *hrPrinterEntry
|
||
| | *hrPrinterTable
|
||
| *-hrDevice
|
||
*/
|
||
|
||
UINT
|
||
GetHrPrinterDetectedErrorState(
|
||
OUT OctetString *outvalue ,
|
||
IN Access_Credential *access ,
|
||
IN InstanceName *instance )
|
||
|
||
{
|
||
|
||
/*
|
||
| The deal on this attribute is that under NT, you can barely tell
|
||
| if the printer is on, unlike 95, where you can tell if it is on its
|
||
| second bottle of toner for the day.
|
||
|
|
||
| Consequently we return a single all-bits zero octet regardless of
|
||
| the instance value (which by now in the calling sequence of things
|
||
| has been validated anyway).
|
||
*/
|
||
|
||
outvalue->length = 1;
|
||
outvalue->string = "\0";
|
||
|
||
return SNMP_ERRORSTATUS_NOERROR ;
|
||
|
||
} /* end of GetHrPrinterDetectedErrorState() */
|
||
|
||
|
||
/*
|
||
* HrPrinterEntryFindInstance
|
||
*
|
||
* This routine is used to verify that the specified instance is
|
||
* valid.
|
||
*
|
||
* Arguments:
|
||
*
|
||
* FullOid Address for the full oid - group, variable,
|
||
* and instance information
|
||
* instance Address for instance specification as an oid
|
||
*
|
||
* Return Codes:
|
||
*
|
||
* SNMP_ERRORSTATUS_NOERROR Instance found and valid
|
||
* SNMP_ERRORSTATUS_NOSUCHNAME Invalid instance
|
||
*
|
||
*/
|
||
|
||
UINT
|
||
HrPrinterEntryFindInstance( IN ObjectIdentifier *FullOid ,
|
||
IN OUT ObjectIdentifier *instance )
|
||
{
|
||
UINT tmp_instance; /* Instance arc value */
|
||
CACHEROW *row; /* Row entry fetched from cache */
|
||
|
||
//
|
||
// Developer instrumentation code to find appropriate instance goes here.
|
||
// For non-tables, it is not necessary to modify this routine. However, if
|
||
// there is any context that needs to be set, it can be done here.
|
||
//
|
||
|
||
if ( FullOid->idLength <= HRPRINTERENTRY_VAR_INDEX )
|
||
// No instance was specified
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME ;
|
||
else if ( FullOid->idLength != HRPRINTERENTRY_VAR_INDEX + 1 )
|
||
// Instance length is more than 1
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME ;
|
||
else
|
||
// The only valid instance for a non-table are instance 0. If this
|
||
// is a non-table, the following code validates the instances. If this
|
||
// is a table, developer modification is necessary below.
|
||
|
||
tmp_instance = FullOid->ids[ HRPRINTERENTRY_VAR_INDEX ] ;
|
||
|
||
/*
|
||
| For hrPrinterTable, the instance arc(s) is a single arc, and it must
|
||
| correctly select an entry in the hrDeviceTable cache.
|
||
|
|
||
| Check that here.
|
||
*/
|
||
if ( (row = FindTableRow(tmp_instance, &hrDevice_cache)) == NULL ) {
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME ;
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
| The instance arc selects an hrDeviceTable row entry, but is that
|
||
| entry actually for a device of type "Printer"?
|
||
|
|
||
| (We examine the last arc of the OID that specifies the device
|
||
| type in the row entry selected by the instance arc).
|
||
*/
|
||
if (row->attrib_list[HRDV_TYPE].u.unumber_value !=
|
||
HRDV_TYPE_LASTARC_PRINTER) {
|
||
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME;
|
||
}
|
||
|
||
// the instance is valid. Create the instance portion of the OID
|
||
// to be returned from this call.
|
||
|
||
instance->ids[ 0 ] = tmp_instance ;
|
||
instance->idLength = 1 ;
|
||
}
|
||
|
||
return SNMP_ERRORSTATUS_NOERROR ;
|
||
|
||
} /* end of HrPrinterEntryFindInstance() */
|
||
|
||
|
||
|
||
/*
|
||
* HrPrinterEntryFindNextInstance
|
||
*
|
||
* This routine is called to get the next instance. If no instance
|
||
* was passed than return the first instance (1).
|
||
*
|
||
* Arguments:
|
||
*
|
||
* FullOid Address for the full oid - group, variable,
|
||
* and instance information
|
||
* instance Address for instance specification as an oid
|
||
*
|
||
* Return Codes:
|
||
*
|
||
* SNMP_ERRORSTATUS_NOERROR Instance found and valid
|
||
* SNMP_ERRORSTATUS_NOSUCHNAME Invalid instance
|
||
*
|
||
*/
|
||
|
||
UINT
|
||
HrPrinterEntryFindNextInstance( IN ObjectIdentifier *FullOid ,
|
||
IN OUT ObjectIdentifier *instance )
|
||
{
|
||
//
|
||
// Developer supplied code to find the next instance of class goes here.
|
||
// If this is a class with cardinality 1, no modification of this routine
|
||
// is necessary unless additional context needs to be set.
|
||
// If the FullOid does not specify an instance, then the only instance
|
||
// of the class is returned. If this is a table, the first row of the
|
||
// table is returned.
|
||
//
|
||
// If an instance is specified and this is a non-table class, then NOSUCHNAME
|
||
// is returned so that correct MIB rollover processing occurs. If this is
|
||
// a table, then the next instance is the one following the current instance.
|
||
// If there are no more instances in the table, return NOSUCHNAME.
|
||
//
|
||
|
||
CACHEROW *row;
|
||
ULONG tmp_instance;
|
||
|
||
|
||
if ( FullOid->idLength <= HRPRINTERENTRY_VAR_INDEX )
|
||
{
|
||
/*
|
||
| Too short: must return the instance arc that selects the first
|
||
| entry in the table if there is one.
|
||
*/
|
||
tmp_instance = 0;
|
||
}
|
||
else {
|
||
/*
|
||
| There is at least one instance arc. Even if it is the only arc
|
||
| we use it as the "index" in a request for the "NEXT" one.
|
||
*/
|
||
tmp_instance = FullOid->ids[ HRPRINTERENTRY_VAR_INDEX ] ;
|
||
}
|
||
|
||
/* Now go off and try to find the next instance in the table */
|
||
if ((row = FindNextTableRow(tmp_instance, &hrDevice_cache)) == NULL) {
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME ;
|
||
}
|
||
|
||
/*
|
||
| The instance arc selects an hrDeviceTable row entry, but is that
|
||
| entry actually for a device of type "Printer"?
|
||
|
|
||
| (We examine the last arc of the OID that specifies the device
|
||
| type in the row entry selected by the instance arc).
|
||
*/
|
||
do {
|
||
if (row->attrib_list[HRDV_TYPE].u.unumber_value ==
|
||
HRDV_TYPE_LASTARC_PRINTER) {
|
||
|
||
/* Found an hrDeviceTable entry for the right device type */
|
||
break;
|
||
}
|
||
|
||
/* Step to the next row in the table */
|
||
row = GetNextTableRow( row );
|
||
}
|
||
while ( row != NULL );
|
||
|
||
/* If we found a proper device-type row . . . */
|
||
if ( row != NULL) {
|
||
instance->ids[ 0 ] = row->index ;
|
||
instance->idLength = 1 ;
|
||
}
|
||
else {
|
||
|
||
/*
|
||
| Fell off the end of the hrDeviceTable without finding a row
|
||
| entry that had the right device type.
|
||
*/
|
||
return SNMP_ERRORSTATUS_NOSUCHNAME ;
|
||
}
|
||
|
||
return SNMP_ERRORSTATUS_NOERROR ;
|
||
|
||
} /* end of HrPrinterEntryFindNextInstance() */
|
||
|
||
|
||
|
||
/*
|
||
* HrPrinterEntryConvertInstance
|
||
*
|
||
* This routine is used to convert the object id specification of an
|
||
* instance into an ordered native representation. The object id format
|
||
* is that object identifier that is returned from the Find Instance
|
||
* or Find Next Instance routines. It is NOT the full object identifier
|
||
* that contains the group and variable object ids as well. The native
|
||
* representation is an argc/argv-like structure that contains the
|
||
* ordered variables that define the instance. This is specified by
|
||
* the MIB's INDEX clause. See RFC 1212 for information about the INDEX
|
||
* clause.
|
||
*
|
||
*
|
||
* Arguments:
|
||
*
|
||
* oid_spec Address of the object id instance specification
|
||
* native_spec Address to return the ordered native instance
|
||
* specification
|
||
*
|
||
* Return Codes:
|
||
*
|
||
* SUCCESS Conversion complete successfully
|
||
* FAILURE Unable to convert object id into native format
|
||
*
|
||
*/
|
||
|
||
UINT
|
||
HrPrinterEntryConvertInstance( IN ObjectIdentifier *oid_spec ,
|
||
IN OUT InstanceName *native_spec )
|
||
{
|
||
static char *array; /* The address of this (char *) is passed back */
|
||
/* as though it were an array of length 1 of these */
|
||
/* types. */
|
||
|
||
static ULONG inst; /* The address of this ULONG is passed back */
|
||
/* (Obviously, no "free()" action is needed) */
|
||
|
||
/* We only expect the one arc in "oid_spec" */
|
||
inst = oid_spec->ids[0];
|
||
array = (char *) &inst;
|
||
|
||
native_spec->count = 1;
|
||
native_spec->array = &array;
|
||
return SUCCESS ;
|
||
|
||
} /* end of HrPrinterEntryConvertInstance() */
|
||
|
||
|
||
|
||
|
||
/*
|
||
* HrPrinterEntryFreeInstance
|
||
*
|
||
* This routine is used to free an ordered native representation of an
|
||
* instance name.
|
||
*
|
||
* Arguments:
|
||
*
|
||
* instance Address to return the ordered native instance
|
||
* specification
|
||
*
|
||
* Return Codes:
|
||
*
|
||
*
|
||
*/
|
||
|
||
void
|
||
HrPrinterEntryFreeInstance( IN OUT InstanceName *instance )
|
||
{
|
||
|
||
/* No action needed for hrPrinter Table */
|
||
} /* end of HrPrinterEntryFreeInstance() */
|
||
|
||
/*
|
||
| End of Generated Code
|
||
*/
|
||
|
||
/* Gen_HrPrinter_Cache - Generate a initial cache for HrDevice PRINTER Table */
|
||
/* Gen_HrPrinter_Cache - Generate a initial cache for HrDevice PRINTER Table */
|
||
/* Gen_HrPrinter_Cache - Generate a initial cache for HrDevice PRINTER Table */
|
||
|
||
BOOL
|
||
Gen_HrPrinter_Cache(
|
||
ULONG type_arc
|
||
)
|
||
|
||
/*
|
||
| EXPLICIT INPUTS:
|
||
|
|
||
| "type_arc" is the number "n" to be used as the last arc in the
|
||
| device-type OID:
|
||
|
|
||
| 1.3.6.1.2.1.25.3.1.n
|
||
| | | |
|
||
| | | * Identifying arc for type
|
||
| | *-hrDeviceTypes (OIDs specifying device types)
|
||
| *-hrDevice
|
||
|
|
||
| for devices created by this cache-population routine.
|
||
|
|
||
| IMPLICIT INPUTS:
|
||
|
|
||
| None.
|
||
|
|
||
| OUTPUTS:
|
||
|
|
||
| On Success:
|
||
| Function returns TRUE indicating that the HrDevice cache has been fully
|
||
| populated with all rows required for Printer devices.
|
||
|
|
||
| On any Failure:
|
||
| Function returns FALSE (indicating "not enough storage" or other
|
||
| internal logic error).
|
||
|
|
||
| THE BIG PICTURE:
|
||
|
|
||
| At subagent startup time, the cache for each table in the MIB is
|
||
| populated with rows for each row in the table. This function is
|
||
| invoked by the start-up code in "Gen_HrDevice_Cache()" to
|
||
| populate the cache for the HrDevice table with printer-specific
|
||
| entries.
|
||
|
|
||
| OTHER THINGS TO KNOW:
|
||
|
|
||
| Since all the attributes in the HrPrinter "sub" table are computed
|
||
| upon request (based on cached information in a selected row in the
|
||
| HrDevice table) there is no need to build a cache specifically for
|
||
| this sub-table. (This routine is loading the HrDevice cache despite
|
||
| it's name). --------
|
||
|
|
||
| This function holds a convention with the GET routines earlier in
|
||
| this module that the "HIDDEN_CTX" attribute for printers contains
|
||
| a string that can be used in OpenPrinter to get a handle to that
|
||
| printer.
|
||
|============================================================================
|
||
| 1.3.6.1.2.1.25.3.5.1...
|
||
| | | |
|
||
| | | *hrPrinterEntry
|
||
| | *hrPrinterTable
|
||
| *-hrDevice
|
||
|
|
||
*/
|
||
{
|
||
CHAR temp[8]; /* Temporary buffer for first call */
|
||
DWORD PI_request_len; /* Printer Info: Storage actually needed */
|
||
DWORD PI_current_len; /* Printer Info: Storage used on 2nd call */
|
||
DWORD PI_count; /* Count of Printer Infos returned */
|
||
UINT i; /* Handy-Dandy loop index */
|
||
PRINTER_INFO_4
|
||
*PrinterInfo; /* --> allocated storage for drive strings */
|
||
|
||
|
||
/*
|
||
| We're going to call EnumPrinters() twice, once to get the proper
|
||
| buffer size, and the second time to actually get the printer info.
|
||
*/
|
||
EnumPrinters(PRINTER_ENUM_LOCAL, // Flags
|
||
NULL, // Name (ignored)
|
||
4, // Level
|
||
temp, // Buffer
|
||
1, // "Too Small" Buffer size
|
||
&PI_request_len, // Required length... comes back.
|
||
&PI_count
|
||
);
|
||
/*
|
||
| Grab enough storage for the enumeration structures
|
||
*/
|
||
if ( (PrinterInfo = malloc(PI_request_len)) == NULL) {
|
||
/* Storage Request failed altogether, can't initialize */
|
||
return ( FALSE );
|
||
}
|
||
|
||
/* Now get the real stuff */
|
||
if (!EnumPrinters(PRINTER_ENUM_LOCAL, // Flags
|
||
NULL, // Name (ignored)
|
||
4, // Level
|
||
(unsigned char *) PrinterInfo, // Buffer to receive enumeration
|
||
PI_request_len, // Actual buffer size
|
||
&PI_request_len, // Required length... comes back.
|
||
&PI_count
|
||
)) {
|
||
|
||
/* Failed for some reason */
|
||
free( PrinterInfo );
|
||
return ( FALSE );
|
||
}
|
||
|
||
|
||
/*
|
||
| Now swing down the list, and for every LOCAL printer,
|
||
|
|
||
| + Fetch the description
|
||
| + Make an hrDevice table row entry with the printer name & description
|
||
*/
|
||
for (i = 0; i < PI_count; i += 1) {
|
||
|
||
/* If it is a Local printer ... */
|
||
if (PrinterInfo[i].Attributes & PRINTER_ATTRIBUTE_LOCAL) {
|
||
|
||
HANDLE hprinter; /* Handle to a printer */
|
||
|
||
/* Open it to get a handle */
|
||
if (OpenPrinter(PrinterInfo[i].pPrinterName, // Printer Name
|
||
&hprinter, // Receive handle here
|
||
NULL // Security
|
||
) == TRUE ) {
|
||
|
||
PRINTER_INFO_2 *p2;
|
||
DWORD P2_request_len; /* Bytes-needed by GetPrinter */
|
||
|
||
|
||
/*
|
||
| Printer is Open, get a PRINTER_INFO_2 "slug-o-data"
|
||
|
|
||
| 1st call: Fails, but gets buffer size needed.
|
||
*/
|
||
GetPrinter(hprinter, // printer handle
|
||
2, // Level 2
|
||
temp, // Buffer for INFO_2
|
||
1, // Buffer-too-small
|
||
&P2_request_len // What we really need
|
||
);
|
||
|
||
/*
|
||
| Grab enough storage for the PRINTER_INFO_2 structure
|
||
*/
|
||
if ( (p2 = malloc(P2_request_len)) == NULL) {
|
||
|
||
/* Storage Request failed altogether, can't initialize */
|
||
free( PrinterInfo );
|
||
ClosePrinter( hprinter );
|
||
return ( FALSE );
|
||
}
|
||
|
||
/*
|
||
| 2nd call: Should succeed.
|
||
*/
|
||
if (GetPrinter(hprinter, // printer handle
|
||
2, // Level 2
|
||
(unsigned char *) p2, // Buffer for INFO_2
|
||
P2_request_len, // Buffer-just-right
|
||
&P2_request_len // What we really need
|
||
) == TRUE) {
|
||
|
||
|
||
/* Add a row to HrDevice Table
|
||
|
|
||
| We're using the printer-driver name as a "Poor Man's"
|
||
| description: the driver "names" are quite descriptive with
|
||
| version numbers yet!.
|
||
|
|
||
| The Hidden Context is the name needed to open the printer
|
||
| to gain information about its status.
|
||
*/
|
||
if (AddHrDeviceRow(type_arc, // DeviceType OID Last-Arc
|
||
p2->pDriverName, // Used as description
|
||
PrinterInfo[i].pPrinterName, // Hidden Ctx
|
||
CA_STRING // Hidden Ctx type
|
||
) == NULL ) {
|
||
|
||
/* Failure at a lower level: drop everything */
|
||
free( p2 );
|
||
free( PrinterInfo );
|
||
ClosePrinter( hprinter );
|
||
return ( FALSE );
|
||
}
|
||
}
|
||
|
||
/* Close up shop on this printer*/
|
||
free( p2 );
|
||
ClosePrinter( hprinter );
|
||
}
|
||
}
|
||
}
|
||
|
||
free( PrinterInfo );
|
||
|
||
return ( TRUE );
|
||
}
|
||
|
||
/* COMPUTE_hrPrinter_errors - Compute "hrDeviceErrors" for a Printer device */
|
||
/* COMPUTE_hrPrinter_errors - Compute "hrDeviceErrors" for a Printer device */
|
||
/* COMPUTE_hrPrinter_errors - Compute "hrDeviceErrors" for a Printer device */
|
||
|
||
BOOL
|
||
COMPUTE_hrPrinter_errors(
|
||
CACHEROW *row,
|
||
UINT *outvalue
|
||
)
|
||
|
||
/*
|
||
| EXPLICIT INPUTS:
|
||
|
|
||
| "row" points to the hrDevice cache row for the printer whose error
|
||
| count is to be returned.
|
||
|
|
||
| Attribute "HIDDEN_CTX" has a string value that is the name of the
|
||
| printer by convention with "Gen_HrPrinter_Cache()" above.
|
||
|
|
||
| "outvalue" is a pointer to an integer to receive the error count.
|
||
|
|
||
| IMPLICIT INPUTS:
|
||
|
|
||
| None.
|
||
|
|
||
| OUTPUTS:
|
||
|
|
||
| On Success:
|
||
| Function returns TRUE and an error count for the specified printer.
|
||
|
|
||
| On any Failure:
|
||
| Function returns FALSE.
|
||
|
|
||
| THE BIG PICTURE:
|
||
|
|
||
| For an hrDevice attribute whose value is "computed", at the time of
|
||
| the request to see it is received, we dispatch to a "COMPUTE_" function
|
||
| to get the value. This is such a routine for printers.
|
||
|
|
||
| OTHER THINGS TO KNOW:
|
||
|
|
||
| This function holds a convention with the Gen_cache routines earlier in
|
||
| this module that the "HIDDEN_CTX" attribute for printers contains
|
||
| a string that can be used in OpenPrinter to get a handle to that
|
||
| printer.
|
||
*/
|
||
{
|
||
|
||
/*
|
||
| No way to get any error counts under NT
|
||
*/
|
||
*outvalue = 0;
|
||
return ( TRUE );
|
||
|
||
}
|
||
|
||
/* COMPUTE_hrPrinter_status - Compute "hrDeviceStatus" for a Printer device */
|
||
/* COMPUTE_hrPrinter_status - Compute "hrDeviceStatus" for a Printer device */
|
||
/* COMPUTE_hrPrinter_status - Compute "hrDeviceStatus" for a Printer device */
|
||
|
||
BOOL
|
||
COMPUTE_hrPrinter_status(
|
||
CACHEROW *row,
|
||
UINT *outvalue
|
||
)
|
||
|
||
/*
|
||
| EXPLICIT INPUTS:
|
||
|
|
||
| "row" points to the hrDevice cache row for the printer whose status
|
||
| is to be returned.
|
||
|
|
||
| Attribute "HIDDEN_CTX" has a string value that is the name of the
|
||
| printer by convention with "Gen_HrPrinter_Cache()" above.
|
||
|
|
||
| "outvalue" is a pointer to an integer to receive the status.
|
||
|
|
||
| IMPLICIT INPUTS:
|
||
|
|
||
| None.
|
||
|
|
||
| OUTPUTS:
|
||
|
|
||
| On Success:
|
||
| Function returns TRUE and a status for the specified printer:
|
||
|
|
||
| "unknown" = 1 If we can't open the printer at all.
|
||
|
|
||
| "running" = 2 If we can open the printer and no status is
|
||
| showing on it.
|
||
| "warning" = 3 If we can open the printer but PAUSED or
|
||
| PENDING_DELETION is showing on it.
|
||
|
|
||
|
|
||
| On any Failure:
|
||
| Function returns FALSE.
|
||
|
|
||
| THE BIG PICTURE:
|
||
|
|
||
| For an hrDevice attribute whose value is "computed", at the time of
|
||
| the request to see it is received, we dispatch to a "COMPUTE_" function
|
||
| to get the value. This is such a routine for printers.
|
||
|
|
||
| OTHER THINGS TO KNOW:
|
||
|
|
||
| This function holds a convention with the Gen_cache routines earlier in
|
||
| this module that the "HIDDEN_CTX" attribute for printers contains
|
||
| a string that can be used in OpenPrinter to get a handle to that
|
||
| printer.
|
||
*/
|
||
{
|
||
CHAR temp[8]; /* Temporary buffer for first call */
|
||
HANDLE hprinter; /* Handle to a printer */
|
||
|
||
|
||
/* Open Printer whose name is in "Hidden Context" to get a handle */
|
||
if (OpenPrinter(row->attrib_list[HIDDEN_CTX].u.string_value, // Printer Name
|
||
&hprinter, // Receive handle here
|
||
NULL // Security
|
||
) == TRUE ) {
|
||
|
||
PRINTER_INFO_2 *p2;
|
||
DWORD P2_request_len; /* Bytes-needed by GetPrinter */
|
||
|
||
|
||
/*
|
||
| Printer is Open, get a PRINTER_INFO_2 "slug-o-data"
|
||
|
|
||
| 1st call: Fails, get buffer size needed.
|
||
*/
|
||
GetPrinter(hprinter, // printer handle
|
||
2, // Level 2
|
||
temp, // Buffer for INFO_2
|
||
1, // Buffer-too-small
|
||
&P2_request_len // What we really need
|
||
);
|
||
|
||
/*
|
||
| Grab enough storage for the PRINTER_INFO_2 structure
|
||
*/
|
||
if ( (p2 = malloc(P2_request_len)) == NULL) {
|
||
|
||
/* Storage Request failed altogether */
|
||
ClosePrinter( hprinter );
|
||
return ( FALSE );
|
||
}
|
||
|
||
/*
|
||
| 2nd call: Should succeed.
|
||
*/
|
||
if (GetPrinter(hprinter, // printer handle
|
||
2, // Level 2
|
||
(unsigned char *) p2, // Buffer for INFO_2
|
||
P2_request_len, // Buffer-just-right
|
||
&P2_request_len // What we really need
|
||
) == TRUE) {
|
||
|
||
/*
|
||
| As of this writing, only two status values are available
|
||
| under NT:
|
||
|
|
||
| PRINTER_STATUS_PAUSED
|
||
| PRINTER_STATUS_PENDING_DELETION
|
||
|
|
||
| Basically, if either of these is TRUE, we'll signal "warning".
|
||
| If neither are TRUE, we'll signal "running" (on the basis that
|
||
| we've managed to open the printer OK and it shows no status).
|
||
*/
|
||
if ( (p2->Status & PRINTER_STATUS_PAUSED)
|
||
|| (p2->Status & PRINTER_STATUS_PENDING_DELETION)) {
|
||
|
||
*outvalue = 3; // "warning"
|
||
}
|
||
else {
|
||
*outvalue = 2; // "running"
|
||
}
|
||
}
|
||
|
||
/* Free up and return */
|
||
ClosePrinter( hprinter );
|
||
free( p2 );
|
||
}
|
||
else {
|
||
*outvalue = 1; // "unknown"
|
||
}
|
||
|
||
return ( TRUE );
|
||
}
|
||
|