/* PREFER.C Revised to return DOS errorlevels... Revised to set local clock to preferred server's time... Compiled with TURBO C. +-------------------------------------------------------------------+ | PREFER is a simple program that can be copied to the | | workstation's network driver subdirectory and included in the | | AUTOEXEC.BAT file immediately after NET3 is executed. PREFER | | breaks ALL connections with the server that NET3 attaches to and | | establishes new connections with a user specified server. From | | that point on the login directory, login utilities, and all | | dependent connections are from the desired server. | | | | Exception: | | | | If it is the user's intention to ATTACH to other servers after | | logging in, dependent connections will be established to that | | server until it is logged out. | | | | Operation: | | | | PREFER is simply used by entering the command "PREFER servername" | | at the prompt or within a batch file, where "servername" is the | | user's desired server. | | | | If PREFER is invoked without a server name it will do nothing and | | return to the DOS prompt. | | | | If PREFER is invoked with a server name where the dependent | | connections are already established, it will indicate such and | | return to the DOS prompt. | | | | If PREFER is invoked after the user has logged in, and the new | | server name is different from the old server name, the user will | | be logged out of the old server when the new connections are | | established. | | | | The prefer program file is PREFER.EXE. It can be invoked at the | | command line or in a batch file, but cannot be invoked from a | | system or user login script. | | | | AAC Associates | | (703) 415 - 4400 | |-------------------------------------------------------------------| | NEW RELEASE "PREFER II" now includes fixes for multiple | | erroneous attachments, and conditions causing the primary server | | connection ID to be "0". | | | | If you run certain older LOGIN revs. and don't do a complete | | login, the program will leave you attached to the server at | | that connection ID. If you do this 8 times to 8 different servers | | you will fill your 8 connection ID slots and not be able to | | to another server to login. The older version PREFER would not | | take into account these multiple attachments in the connection | | ID table and would leave them there. PREFER II clears any and | | all additional attachments. | | | | If you login to a file server and make a mistake while logging | | in, the program will set the Primary Connection ID to "0". This | | created an error condition in the earlier version of PREFER that | | would cause the workstation shell to loose all connections and | | error out. PREFER II corrects for this. | | | | PREFER II by Dan Smith 9-5-90 | +-------------------------------------------------------------------+ */ #include #include #include #include #include main(argc,argv) int argc; char *argv[]; { void ttime(void); void primary(void); char serverName[48]; WORD connectID1, connectID2, DefaultID, PrimaryID; int netReturn,localDrives; char fileServerName[48]; char newDirHandle, mask; char loginPath[]="SYS:LOGIN"; char letter,chr='A'; printf ("\nPREFER 2.1 By AAC Associates, Inc.\n"); if(argc<2) { printf("\nSyntax: PREFER servername\n\n"); printf("Errorlevels returned: \n\n"); printf(" 0 - Success. Now attached to target server as the primary server.\n"); printf(" 1 - Already attached to target server as the primary server.\n"); printf(" 2 - Error attaching to the target server.\n"); printf(" 3 - Unknown file server was requested.\n"); printf(" 4 - No target server named specified on command line.\n\n"); exit(4); } if (strlen(argv[1]) > 47) /* hangs machine if this is the case */ argv[1][47] = '\0'; strcpy(serverName,argv[1]); strupr(serverName); PrimaryID=GetPrimaryConnectionID(); DefaultID=GetDefaultConnectionID(); if(PrimaryID == 0) { SetPrimaryConnectionID(DefaultID); PrimaryID = DefaultID; } GetFileServerName(PrimaryID,fileServerName); printf("\nPrimary server is %s.\n",fileServerName); netReturn=AttachToFileServer(&serverName, &connectID1); switch (netReturn) { case 0 : break; case 248 : if (PrimaryID == connectID1) { printf("Already attached to server.\n"); primary(); printf("All other connections cleared.\n"); exit(1); } break; case 249 : printf("No free connection slots.\n"); exit(2); break; case 250 : printf("No more server slots.\n"); exit(2); break; case 252 : printf("Unknown file server requested: %s.\n",serverName); exit(3); break; case 254 : printf("Server bindery locked.\n"); exit(2); break; case 255 : printf("No response from server.\n"); exit(2); break; default : printf("Unknown error returned.\n",netReturn); exit(2); break; } primary(); AttachToFileServer(&serverName, &connectID1); SetPrimaryConnectionID(connectID1); DetachFromFileServer(PrimaryID); ttime(); localDrives=GetNumberOfLocalDrives(); letter=(char)(chr+localDrives); netReturn=AllocPermanentDirectoryHandle(0x00,&loginPath,letter,newDirHandle,mask); printf("New primary server is %s.\n",serverName); printf("All other connections cleared.\n"); exit(0); } void ttime(void) { char dateTime[7]; union REGS regs; GetFileServerDateAndTime(&dateTime); if (dateTime[0] < 80) regs.x.cx = dateTime[0] + 2000; else regs.x.cx = dateTime[0] +1900; regs.h.dh = dateTime[1]; regs.h.dl = dateTime[2]; regs.h.ah = 0x2b; int86(0x21, ®s, ®s); regs.h.ch = dateTime[3]; regs.h.cl = dateTime[4]; regs.h.dh = dateTime[5]; regs.h.ah = 0x2d; int86(0x21, ®s, ®s); } void primary(void) { WORD PrimaryID,ID; int IDtest; PrimaryID=GetPrimaryConnectionID(); /*______________________________________________*/ /* Loop to test all eight connection ID's */ /*----------------------------------------------*/ for(ID=1;ID<=8;++ID) { IDtest=IsConnectionIDInUse(ID); if(IDtest) { if(ID != PrimaryID) { DetachFromFileServer(ID); } } } }