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- // ╔════════════════════════════════════════════════════════════════════╗
- // ║ ║
- // ║ module: semainfo.c ║
- // ║ abstract: This module shows how to make the GetSemaphoreIn- ║
- // ║ formation system call using the F2 Shell Interface. ║
- // ║ Obviously, it requires the NetWare Shell. ║
- // ║ ║
- // ║ environment: NetWare 3.x v3.11 ║
- // ║ Borland C 3.0 ║
- // ║ ║
- // ║ This software is provided as is and carries no warranty ║
- // ║ whatsoever. Novell disclaims and excludes any and all implied ║
- // ║ warranties of merchantability, title and fitness for a particular ║
- // ║ purpose. Novell does not warrant that the software will satisfy ║
- // ║ your requirements or that the software is without defect or error ║
- // ║ or that operation of the software will be uninterrupted. You are ║
- // ║ using the software at your risk. The software is not a product ║
- // ║ of Novell, Inc. or any of subsidiaries. ║
- // ╚════════════════════════════════════════════════════════════════════╝
-
- #include <stdio.h>
- #include <string.h>
- #include <stdlib.h>
- #include <conio.h>
-
- #include "nwsys.h"
-
- //
- // First of all, we define the request and reply structures which are
- // needed for the GetSemaphoreInformation API call. These structures are
- // layed out according to the System Call documentation.
- //
-
- struct {
- WORD sflen; // length of the structure. This is 6 + 'onlen'
- BYTE sfcode; // the subfunction code, in our case 53.
- WORD lastRecordSeen; // length of name (below)
- BYTE semaphoreNameLength;
- char semaphoreName[128];
- }Request;
-
- struct connStruct {
- WORD connectionNumber;
- // Connection holding semaphore open
- WORD taskNumber; // task number holding semaphore open
- };
-
- struct {
- WORD nextRequestRec; // next record to be requested.
- WORD openCount; // total number of times opened
- WORD value; // value of semaphore
- BYTE semaphoreCount; // number of semaphores in this iteration
- struct connStruct conn[150];
- // Array of connection information
- } Reply;
-
- int numConnections;
- char semaphoreName[128];
-
- void processEntries(void);
- void displayData(void);
- //
- // This routine allocates memory for the data returned for each file.
- // It also makes the GetConnectionOpenFiles call and parses the data
- // for each file.
- //
- void ProcessEntries(void)
- {
- numConnections+=Reply.semaphoreCount;
- }
-
- //
- // Display the list of open files for the connection.
- //
- void DisplayData( void )
- {
- int i;
-
- clrscr();
- printf("\n\nSemaphore Information For %s Value: %d\n\n",
- semaphoreName,Reply.value);
- printf("Conn Task\n");
- printf("---- ----\n");
- for(i=0;i<numConnections;i++) {
- printf(" %02d ",WordSwap(Reply.conn[i].connectionNumber));
- printf(" %02d\n",WordSwap(Reply.conn[i].taskNumber));
- }
- }
- //
- // This is the main program. The purpose is to make the GetBinderyObjectID
- // API call to illustrate making system calls using the F2 interface.
- //
-
- void main(int argc, char *argv[])
- {
- int cc;
- int length;
-
- if(argc!=2){printf("usage: SEMAINFO semaphoreName\n");exit(1);}
- strcpy(semaphoreName,argv[1]);
- numConnections=0;
- //
- // Build the request buffer
- //
- Request.sflen = strlen(semaphoreName) + 6;
- Request.sfcode = 242; // subfunction code
- length=strlen(semaphoreName);
- Request.semaphoreNameLength=(BYTE)length;
- memcpy(Request.semaphoreName,semaphoreName,strlen(semaphoreName));
- Request.lastRecordSeen = 0;
- cc = NWSystemCall(23,&Request,sizeof Request,&Reply,sizeof Reply);
- printf("Function returned: %03d--%#02x\n",cc,cc);
- if( cc == 0 ) {
- ProcessEntries();
- DisplayData();
- }
- }