以前在智器Q5/V5上配合Openbox时自己胡乱写的一个东西，推荐用xdotool替代。#C #X

sendevent.c

/*
 * sendevent
 *       A Simple Wraper to Send XEvent
 * usage:
 *       sendevent key|mouse [-modifier] name
 *
 * Start : 2010/3/6
 * Last  : 2010/3/24
 * 
 * Copyright (c) 2010 Skydark Chen <skydark2 [at] gmail.com>
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>


const char MOD_TABLE[] = { 's', 'l', 'c', 'a', '\0', };
const char MOUSE_TABLE[][7] = { "left", "middle", "right", "up", "down", "", };

 /* Give me a string like asc, I will told you it is Alt+Shift+Ctrl, 
  * by give you a num like 8+1+4=0x0d */
int string_to_modifier(const char *str)
{
	int ret = 0, i;
	const char *msym;
	
	while (*str != '\0') {
		i = 1;
		msym = MOD_TABLE;
		while (*msym != '\0') {
			if (*msym++ == *str) {
				ret += i;
				break;
			}
			i *= 2;
		}
		str++;
	}
	
    return ret;
}

void show_eg_and_exit(const int ret)
{
	printf("sendevent key|mouse [-modifier] name\n");
	printf("Eg. : sendevent key -ca f \n");
	printf("      It means Send Ctrl+Alt+f\n");
	exit(ret);
}

Display* open_display(void)
{
	Display *display;
	
	if (!getenv("DISPLAY"))
		display = XOpenDisplay(":0");
	else
		display = XOpenDisplay(NULL);
	
	if (!display) {
		fprintf(stderr, "Can't open display!\n");
		exit(1);
	}
	
	return display;
}
	
void send_event_key_click(const char * str, const int mod)
{
	Display *display;
	KeySym ksym;
	KeyCode kcode;
	XEvent event;
	Window focus;
	int stat;
	
	display = open_display();
	
	if (!(ksym = XStringToKeysym(str))) {
		fprintf(stderr, "Can not convert keysym's name : %s\n", str);
		show_eg_and_exit(2);
	}
	
	if (!(kcode = XKeysymToKeycode(display, ksym))) {
		fprintf(stderr, "Can not convert keysym %s to keycode!\n", str);
		show_eg_and_exit(2);
	}
	
	XGetInputFocus(display, &focus, &stat);
	
	event.xkey.type = KeyPress;
	event.xkey.send_event = True;
	event.xkey.display = display;
	event.xkey.window = focus;
	event.xkey.root = DefaultRootWindow(display);
	event.xkey.subwindow = None;
	event.xkey.time = CurrentTime;
	event.xkey.x = 0;
	event.xkey.y = 0;
	event.xkey.x_root = 0;
	event.xkey.y_root = 0;
	event.xkey.state = mod;
	event.xkey.keycode = kcode;
	event.xkey.same_screen = True ; 
	
	XSendEvent(display,
			 focus,
			 False,
			 KeyPressMask | KeyReleaseMask,
			 &event);
	
	event.xkey.type = KeyRelease;
	
	XSendEvent(display,
			 focus,
			 False,
			 KeyPressMask | KeyReleaseMask,
			 &event);
	
	XFlush(display);
	XSync(display, False);
}

void send_event_mouse_click(const char * str, const int mod)
{
	Display *display;
	unsigned int btn = 0;
	XEvent event;
	Window root, child, dwin, tmp;
	int rx,ry,dx,dy;
	unsigned int mask;
	
	display = open_display();
	
	/* The method of this part is similar to 'string_to_modifier', 
	 * but I don't want to fix it right now, what a lazy boy! = = */
	while ( (MOUSE_TABLE[btn][0] != '\0') && 
			 strcmp(&MOUSE_TABLE[btn][0], str) )
		btn++;
	if (MOUSE_TABLE[btn][0] == '\0') {
		fprintf(stderr, "Unknown mouse button's name : %s\n", str);
		show_eg_and_exit(2);
	}
	btn++;
	
	XQueryPointer(display, DefaultRootWindow(display), 
				&root, &child, &rx, &ry, &dx, &dy, &mask);
	// Where is our mouse? I am as pool as possible...=.=||
	do {
		XTranslateCoordinates(display, root, child, 
				rx, ry, &dx, &dy, &dwin);
	} while (tmp = dwin, dwin = child, child = tmp);
	
	event.xbutton.type = ButtonPress;
	event.xbutton.send_event = True;
	event.xbutton.display = display;
	event.xbutton.window = dwin;
	event.xbutton.root = root;
	event.xbutton.subwindow = None;
	event.xbutton.time = CurrentTime;
	event.xbutton.x = dx;
	event.xbutton.y = dy;
	event.xbutton.x_root = rx;
	event.xbutton.y_root = ry;
	event.xbutton.state = mod;
	event.xbutton.button = btn;
	event.xbutton.same_screen = True ; 
	
	XSendEvent(display,
			 dwin,
			 False,
			 ButtonPressMask | ButtonReleaseMask,
			 &event);
	
	event.xbutton.type = ButtonRelease;
	
	XSendEvent(display,
			 dwin,
			 False,
			 ButtonPressMask | ButtonReleaseMask,
			 &event);
	
	XFlush(display);
	XSync(display, False);
}


int main(int argc, char **argv)
{
	int mod = 0;
	char * detail = NULL;
	
	if (argc < 3) show_eg_and_exit(0);
	
	if (*argv[2]=='-') {
		if (argc < 4) show_eg_and_exit(2);
		mod = string_to_modifier(argv[2]+1);
		detail = argv[3];
	} else detail = argv[2];
	
	if (!strcmp(argv[1],"key"))
		send_event_key_click(detail, mod);
	else if (!strcmp(argv[1],"mouse"))
		send_event_mouse_click(detail, mod);
	else show_eg_and_exit(2);
	
	return 0;
}