| //*************************************************************** // From the book "Win32 System Services: The Heart of Windows NT" // by Marshall Brain // Published by Prentice Hall file:// // Copyright 1994, by Prentice Hall. file:// // This code implements a simple named pipe sender. file://*************************************************************** // ssnpsend.cpp // Usage: ssnpsend #include #include int main() { char *toSendtxt="Test String"; HANDLE ssnpPipe; DWORD NumBytesWritten; char machineName[80]; char pipeName[80]; cout << "Enter name of server machine: "; cin >> machineName; wsprintf(pipeName, "\\\\%s\\pipe\\ssnp", machineName); /* Create the named pipe file handle for sending messages */ ssnpPipe=CreateFile(pipeName, GENERIC_WRITE, FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES) NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, (HANDLE) NULL); /* Check and see if the named pipe file was opened, if not terminate program */ if (ssnpPipe == INVALID_HANDLE_VALUE) { cerr << "ERROR: Unable to create a named pipe " << endl; cerr << GetLastError() << endl; return (1); } /* Repeatedly send message until program is terminated */ while(1) { cout << "Sending..." << endl; /* Write message to the pipe */ if (!WriteFile(ssnpPipe, toSendtxt, (DWORD) strlen(toSendtxt)+1, &NumBytesWritten, (LPOVERLAPPED) NULL)) { /* If error occurs when writing to named pipe, terminate program */ cerr << "ERROR: Unable to write to named pipe " << GetLastError() << endl; CloseHandle(ssnpPipe); return (1); } /* Wait before sending the message again */ Sleep(4800); } /* while*/ } |
