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twait.zip
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TAPEWAIT.C
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C/C++ Source or Header
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1992-06-24
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6KB
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239 lines
/********************************************************
* TapeWait -- Waits until only specified number of users are still
* on the system or until the <Esc> or <A> key is pressed.
*
* Parameters fileserver: File Server to poll
* maxusers: Maximum number of users to ignore
*
* Returns 0: Wrong Syntax
* 1: <Esc> key pressed by user to proceed or automaic exit
* 2: <A> key pressed to abort
********************************************************/
#define TIMEDELAY 10 /* Time delay in seconds */
#include <conio.h>
#include <graph.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <nit.h>
#include <niterror.h>
int Pause(double);
void AtSay(short,short,char *),
ClearScreen(void),
ClearWindow(void),
DefineTextWindow(short,short,short,short),
ExitProgram(int),
HelpScreen(void),
SendBroadcast(void);
WORD DisplayUserList(void),
GetFileServerConnectionID(char *);
WORD defaultConnectionID,
maxConnectionsSupported;
void main(int argc, char *argv[])
{
char stringBuffer[81];
int errorCode,exitCondition,keyStroke,maxNumberUsers;
WORD fileServerNumber,numberUsers;
FILE_SERV_INFO serverInfo;
/* Set variable defaults */
exitCondition=maxNumberUsers=0;
/* Get the current connection number */
defaultConnectionID=GetPreferredConnectionID();
/* If the number of parameters is 0 or help is asked, display help */
argc--;
if (!argc)
HelpScreen();
if ((argv[1][1]=='?') || (argv[1][1]=='h') || (argv[1][1]=='H'))
HelpScreen();
/* Switch to the file server specified in argument 1 */
fileServerNumber=GetFileServerConnectionID(argv[1]);
if (!fileServerNumber)
HelpScreen();
SetPreferredConnectionID(fileServerNumber);
/* Disable broadcasts */
DisableBroadcasts();
/* Get the maximum number of connections on the server */
errorCode=GetServerInformation(sizeof(serverInfo),&serverInfo);
if (errorCode)
ExitProgram(errorCode);
maxConnectionsSupported=serverInfo.maxConnectionsSupported;
/* Get the maximum number of users, if not set, default to 1 */
if (argc > 1)
maxNumberUsers=atoi(argv[2]);
if (!maxNumberUsers)
maxNumberUsers=1;
/* Draw the screen for displaying the users */
ClearScreen();
sprintf(stringBuffer,"TapeWait -- Waiting until only %d users left (time delay %d seconds)",maxNumberUsers,(int)TIMEDELAY);
AtSay(1,1,stringBuffer);
AtSay(24,7,"Press <Esc> to Continue, <A> to Abort or <T> to re-send the Message");
AtSay(2,1,"Connection User ID Full Name");
AtSay(3,1,"---------- ------------------ ----------------------------------------");
DefineTextWindow(4,1,22,78);
/* Send the message to all users to logout */
SendBroadcast();
while (!exitCondition)
{
/* Display the user list */
numberUsers=DisplayUserList();
/* Check is number of users remaining is less that or equal to specified */
if (numberUsers <= (WORD)maxNumberUsers)
{
exitCondition=1;
break;
}
/* Check for a keypress, if one, process */
if (Pause((double)TIMEDELAY))
{
keyStroke=getch();
switch (keyStroke)
{
case 27: exitCondition=1; /* <Esc> */
break;
case 'A':
case 'a': exitCondition=2; /* <A> */
break;
case 'T': SendBroadcast(); /* <T> */
break;
}
}
}
ExitProgram(exitCondition);
}
void AtSay(short row,short column,char *text)
{
_settextposition(row,column);
_outtext(text);
}
void ClearScreen(void)
{
_clearscreen(_GCLEARSCREEN);
}
void ClearWindow(void)
{
_clearscreen(_GWINDOW);
}
void DefineTextWindow(short row1,short column1,short row2,short column2)
{
_settextwindow(row1,column1,row2,column2);
}
void ExitProgram(int errorLevel)
{
EnableBroadcasts();
SetPreferredConnectionID(defaultConnectionID);
exit(errorLevel);
}
WORD GetFileServerConnectionID(char *fileServer)
{
WORD i;
char fileServerName[48];
for (i=1; i <= 8; i++)
if (IsConnectionIDInUse(i))
{
GetFileServerName(i,fileServerName);
if (strcmpi(fileServer,fileServerName)==0)
return(i);
}
return(0);
}
void HelpScreen(void)
{
printf("TapeWait -- Waits until only a specified number of users\n");
printf(" are logged on or until the <Esc> or <A> key is\n");
printf(" pressed.\n");
printf("Syntax: TapeWait <fileserver> <users remaining>\n");
printf("Return: 1 = Proceed with backup\n");
printf(" 2 = Abort backup\n");
printf(" 0 = Syntax error\n\n");
ExitProgram(0);
}
int Pause(double timeDelay)
{
time_t startTime,endTime;
int keyPress;
time(&startTime);
do
{
time(&endTime);
keyPress=kbhit();
} while ((difftime(endTime,startTime) < timeDelay) && !keyPress);
return(keyPress);
}
void SendBroadcast(void)
{
BYTE resultList[255];
WORD connectionList[255];
WORD connectionCount;
for (connectionCount=0; connectionCount<maxConnectionsSupported; connectionCount++)
connectionList[connectionCount]=connectionCount;
SendBroadcastMessage("Please LOG OUT, Backing up files.",connectionList,resultList,maxConnectionsSupported);
}
WORD DisplayUserList(void)
{
BYTE moreSegments,propertyFlags;
char objectName[48],loginTime[8],propertyValue[128],stringBuffer[81];
int loopCounter,objectType,errorCode;
long objectID;
WORD connectionNumber,usersLoggedOn;
loopCounter=0;
usersLoggedOn=0;
connectionNumber=1;
ClearWindow();
/* Display the user list in the defined window */
while ((loopCounter < 19) && (connectionNumber <= maxConnectionsSupported))
{
errorCode=GetConnectionInformation(connectionNumber,objectName,
&objectType,&objectID,loginTime);
if ((!errorCode) && (objectName[0] != '\0') && (objectType==OT_USER))
{
errorCode=ReadPropertyValue(objectName,objectType,"IDENTIFICATION",1,
propertyValue,&moreSegments,&propertyFlags);
if (!errorCode)
sprintf(stringBuffer," %3d %-18s %-40s",connectionNumber,objectName,propertyValue);
else
sprintf(stringBuffer," %3d %-18s",connectionNumber,objectName);
loopCounter++;
usersLoggedOn++;
AtSay((short)loopCounter,1,stringBuffer);
}
connectionNumber++;
}
return(usersLoggedOn);
}