Bug 2710

Summary:	X Test extensions mix strings
Product:	xorg	Reporter:	Thorsten Staerk <dev>
Component:	Lib/other	Assignee:	Stuart Anderson <anderson>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	high
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Thorsten Staerk 2005-03-12 08:04:40 UTC

I wrote a test program that shall simulate a user typing "test" on the 
keyboard. I am using your Xtest extension for that. 
The program simulates "ttes" instead of "test". 
 
The same problem can be seen in Xautomation from 
http://hoopajoo.net/projects/xautomation.html 
 
Here is my test program simkey.c: 
// This program demonstrates a bug in the X test extension 
// Compile and link this program like this: gcc -I/usr/X11R6/include 
-L/usr/X11R6/lib -o simkey simkey.c -lX11 -lXtst 
 
#include <X11/extensions/XTest.h> 
#include <X11/keysym.h> 
#include <stdio.h> 
 
int main(int argc, char *argv[]) 
{ 
  Display* disp = XOpenDisplay(NULL); 
  { 
    char *t="test"; 
    char *s; 
    int i; 
    for (i=0;i<=3;i++) 
    { 
      strncpy(s,&t[i],1); 
      XTestFakeKeyEvent( disp, XKeysymToKeycode (disp, *s), True, CurrentTime); 
      XTestFakeKeyEvent( disp, XKeysymToKeycode (disp, *s), False, 
CurrentTime); 
    } 
  } 
  XCloseDisplay(disp); 
}

Comment 1 Adam Jackson 2005-05-30 11:28:09 UTC

product shift, xorg -> xtest.

Comment 2 Daniel Stone 2006-04-01 17:51:15 UTC

does flushing xlib's buffer -- XFlush(dpy, FALSE); -- after each character,
help?  if not, does using XSync instead of XFlush help?

Comment 3 Thorsten Staerk 2006-04-01 18:25:58 UTC

Time has passed, my compiler has changed to GCC 4. Here's my adapted test 
program: 
 
/* This program demonstrates a bug in the X test extension  
Compile and link this program like this: gcc -I/usr/X11R6/include 
-L/usr/X11R6/lib -o simkey simkey.c -lX11 -lXtst  
*/ 
  
#include <X11/extensions/XTest.h>  
#include <X11/keysym.h>  
#include <stdio.h>  
  
int main(int argc, char *argv[])  
{  
  Display* disp = XOpenDisplay(NULL);  
  {  
    char *t="test";  
    char *s;  
    int i;  
    for (i=0;i<=3;i++)  
    {  
      s=&t[i];  
      XTestFakeKeyEvent( disp, XKeysymToKeycode (disp, *s), True, CurrentTime);  
      XTestFakeKeyEvent( disp, XKeysymToKeycode (disp, *s), False,  
CurrentTime);  
    }  
  }  
  XCloseDisplay(disp);  
}

Comment 4 Thorsten Staerk 2006-04-01 18:27:27 UTC

XFlush(disp) brings the solution.

Comment 5 Thorsten Staerk 2006-04-01 18:28:22 UTC

err... thanks, you really made my day !!!

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