问题
I want to simulate many key press events. I found a solution by using XTestFakeKeyEvent
, but when I simulate more than 210 times my program raises a "Maximum number of clients reached" segmentation fault. I don't known how to solve this problem.
My code here:
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/extensions/XTest.h>
#include <stdio.h>
#define PRESS_UP 0
#define PRESS_DOWN 1
#define PRESS_LEFT 2
#define PRESS_RIGHT 3
#define PRESS_ENTER 4
#define PRESS_ESC 5
#define PRESS_HOME 6
Display *display;
unsigned int keycode;
int press(int key){
display = XOpenDisplay(NULL);
if(key == PRESS_UP)
keycode = XKeysymToKeycode(display, XK_Up);
else if(key == PRESS_DOWN)
keycode = XKeysymToKeycode(display, XK_Down);
else if(key == PRESS_LEFT)
keycode = XKeysymToKeycode(display, XK_Left);
else if(key == PRESS_RIGHT)
keycode = XKeysymToKeycode(display, XK_Right);
else if(key == PRESS_ENTER)
keycode = XKeysymToKeycode(display, XK_Return);
else if(key == PRESS_ESC)
keycode = XKeysymToKeycode(display, XK_Escape);
else if(key == PRESS_HOME)
keycode = XKeysymToKeycode(display, XK_Home);
XTestFakeKeyEvent(display, keycode, True, 0);
XTestFakeKeyEvent(display, keycode, False, 0);
XFlush(display);
return 0;
}
int main(int argc, char *argv[]){
int count = 0;
while (count < 500){
press(PRESS_UP);
printf("count =%d\n" ,count);
count ++;
}
}
Output :
$ gcc -lXtst -lX11 Util_KeyPressSimulator.c
$ ./a.out
count =0
^[[Acount =1
^[[Acount =2
...
^[[Acount =208
^[[Acount =209
^[[Acount =210
^[[AMaximum number of clients reachedSegmentation fault
Does one please help, Thank you.
回答1:
You're doing an XOpenDisplay
per iteration without a matching XCloseDisplay
. Consider opening the display once, in main()
, outside the loop, and closing it before you exit.
来源:https://stackoverflow.com/questions/1409886/help-maximum-number-of-clients-reached-segmentation-fault