Path: utzoo!attcan!utgpu!news-server.csri.toronto.edu!mailrus!ames!rex!rouge!cacs.usl.edu
From: aan@cacs.usl.edu (Anand Narasimhan)
Newsgroups: comp.windows.x
Subject: Using XtAddInput
Message-ID: <12715@rouge.usl.edu>
Date: 4 Aug 90 18:48:57 GMT
Sender: anon@rouge.usl.edu
Followup-To: aan@swamp.cacs.usl.edu
Distribution: na
Organization: CACS, Univ. of Southwestern Louisiana
Lines: 43

Hello !
		
		I am working on a project in which I need a routine to read input from 
	the standard input and create multiple independent windows and perform some
	operations using the input obtained from the stdin. I wrote an example 
	program to see how XtAddInput works. I am facing certain difficulties in 
	reading the input from stdin. I would appreciate if somebody can help me in
	solving those problems.

	A part of the code is given below.

	top = XtAppCreateShell(app_con,"Addinp",applicationShellWidgetClass,dpy,
								NULL,0);
 		............

	XtAppAddInput(app_con,fileno(stdin),XtInputReadMask,get_input,top);
	XtRealizeWidget(top);
	XtAppMainLoop(app_con); /* End of Main */


	get_input(w,fid,id)
	Widget w;
	int *fid;
	XtInput *id;
	{
		int nbytes;
		char in[2];
		.........
		nbytes = read(*fid,in,1);

		..............

	}

	The problem I am faced with is that whenever I type an input in the stdin
	the callback procedure is invoked but the input is not read.  Instead it
	waits for me to type another character. If I use fsacnf or fgets a "\0"
	is read. Can anyone please tell me how to do this? Kindly send your 
	suggestions to me at aan@swamp.cacs.usl.edu or anand@gator.cacs.usl.edu.

	Thanks 

	Anand