mirror of https://github.com/nmasse-itix/XSpy.git
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6c3aa3e74d
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LDFLAGS = -lX11 -L/usr/X11R6/lib |
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CFLAGS = -Wall |
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all: xspy |
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clean: |
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rm -f *.o xspy |
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.PHONY: all clean |
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@ -0,0 +1,309 @@ |
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/*
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* XSpy - Spies a window for key events. |
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* Copyright (C) 2006 Nicolas MASSE <nicolas27.masse@laposte.net> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <X11/Xlib.h> |
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#include <X11/Xutil.h> |
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/* Defines the behavior of the program : windows list or window spy */ |
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typedef enum {MODE_LIST = 0, MODE_SPY = 1} Mode; |
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/**
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* Prints the details about the window. |
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* |
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* @param dsp the display. |
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* @param w the window. |
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* @param depth the depth in the window stack. |
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*/ |
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void PrintWindow(Display * dsp, Window w, int depth) { |
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int i; |
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char * name; |
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/* indent */ |
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for (i = 0; i < depth; i++) { |
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printf(" "); |
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} |
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printf("%#.8lx - ", w); |
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/* Display the window title */ |
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int res = XFetchName(dsp, w, &name); |
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if (res) { |
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printf("\"%s\"", name); |
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} else { |
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printf("(has no name)"); |
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} |
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XFree(name); |
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printf("\n"); |
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} |
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/**
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* Lists recursively all the windows of the display. |
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* |
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* @param dsp the display. |
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* @param w the parent window. |
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* @param depth the depth in the window stack. |
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*/ |
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void ListWindows(Display * dsp, Window w, int depth) { |
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Window rootWindow; |
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Window * windowsList; |
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Window parentWindow; |
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unsigned int nWindows; |
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int res = XQueryTree( |
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dsp, /* Display */ |
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w, /* Window */ |
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&rootWindow, /* Root window */ |
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&parentWindow, /* Parent window */ |
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&windowsList, /* Windows list */ |
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&nWindows /* Number of child windows */ |
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); |
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if (res) { |
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int i; |
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for (i = 0; i < nWindows; i++) { |
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PrintWindow(dsp, windowsList[i], depth); |
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ListWindows(dsp, windowsList[i], depth + 1); |
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} |
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XFree(windowsList); |
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} |
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} |
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/**
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* Lists all the windows of the connected display to the standard output. |
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* |
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* @param dsp the display |
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*/ |
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void ListAllWindows(Display * dsp) { |
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/* Print the root window */ |
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Window w = DefaultRootWindow(dsp); |
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PrintWindow(dsp, w, 0); |
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/* List all subwindows recursively */ |
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ListWindows(dsp, w, 1); |
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} |
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/**
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* Listens to the window w. |
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* |
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* @param dsp the display |
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* @param w the window |
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*/ |
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void RegisterListener(Display * dsp, Window w) { |
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/* Select useful events */ |
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XSelectInput(dsp, w, KeyPressMask|KeyReleaseMask); |
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} |
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/**
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* Recursively registers the listeners using w as root window. |
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* |
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* @param dsp the display |
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* @param w the root window |
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*/ |
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void RegisterListeners(Display * dsp, Window w) { |
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Window rootWindow; |
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Window * windowsList; |
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Window parentWindow; |
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unsigned int nWindows; |
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int res = XQueryTree( |
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dsp, /* Display */ |
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w, /* Window */ |
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&rootWindow, /* Root window */ |
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&parentWindow, /* Parent window */ |
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&windowsList, /* Windows list */ |
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&nWindows /* Number of child windows */ |
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); |
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if (res) { |
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int i; |
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for (i = 0; i < nWindows; i++) { |
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RegisterListener(dsp, windowsList[i]); |
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RegisterListeners(dsp, windowsList[i]); |
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} |
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XFree(windowsList); |
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} |
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} |
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/**
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* Registers all the listeners. |
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* |
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* @param dsp the display. |
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*/ |
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void RegisterAllListeners(Display * dsp) { |
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/* Register the root window */ |
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Window w = DefaultRootWindow(dsp); |
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RegisterListener(dsp, w); |
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/* Register all subwindows recursively */ |
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RegisterListeners(dsp, w); |
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} |
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/**
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* Endless loop which waits for key events and prints them on the standard |
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* output. |
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* |
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* @param dsp the display. |
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*/ |
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void WaitForKeys(Display * dsp) { |
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XEvent evt; |
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XKeyEvent * kevt = (XKeyEvent *) &evt; |
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KeySym key; |
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char key_str[256]; |
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size_t size; |
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while (1) { |
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/* Wait for an event */ |
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XNextEvent(dsp, &evt); |
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switch (evt.type) { |
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case KeyPress: |
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case KeyRelease: |
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/* Retrieve information about the event */ |
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size = XLookupString(kevt, key_str, 256, &key, 0); |
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key_str[size] = '\0'; |
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printf("%#.8lx: ", kevt->window); |
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if (evt.type == KeyPress) { |
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printf("KeyPress: "); |
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} else { |
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printf("KeyRelease: "); |
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} |
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/* Prints the key name */ |
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printf("%s\n", XKeysymToString(key)); |
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break; |
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default: |
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printf("UnhandledEvent\n"); |
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break; |
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} |
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} |
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} |
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/**
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* Displays an help message and exits. |
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*/ |
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void DisplayUsage(void) { |
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fprintf(stderr, "Usage: xspy {list | spy [window_id]| help}\n"); |
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fprintf(stderr, "\n"); |
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fprintf(stderr, "Valid modes :\n"); |
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fprintf(stderr, "\tlist : displays all windows of the display.\n"); |
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fprintf(stderr, "\tspy : listen the windows for key events.\n"); |
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fprintf(stderr, "\thelp : this help message.\n"); |
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fprintf(stderr, "\n"); |
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fprintf(stderr, "Parameters :\n"); |
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fprintf(stderr, "\twindow_id : the id of the window to listen.\n"); |
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fprintf(stderr, "\t If not specified, listen to all windows\n"); |
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fprintf(stderr, "\n"); |
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fprintf(stderr, "How to change the display ?\n"); |
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fprintf(stderr, "\t$ DISPLAY=host:display program\n"); |
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fprintf(stderr, "\tExample :\n"); |
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fprintf(stderr, "\t$ DISPLAY=tx10:0 xspy\n"); |
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exit(1); |
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} |
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/**
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* Parses the options of the program. |
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* |
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* @param argc the number of arguments |
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* @param argv an array of arguments. |
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* @param win a pointer to the window id to listen. |
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* @return the mode. |
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*/ |
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Mode ParseOptions(int argc, char ** argv, Window * win) { |
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Mode mode = MODE_LIST; |
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if (argc > 1) { |
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if (strcmp(argv[1], "list") == 0) { |
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mode = MODE_LIST; |
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} else if (strcmp(argv[1], "spy") == 0) { |
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mode = MODE_SPY; |
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if (argc != 3) { |
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*win = 0; |
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} else { |
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char * endPtr = NULL; |
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*win = strtol(argv[2], &endPtr, 16); |
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if (*endPtr != '\0') { |
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fprintf(stderr, "Unknown number: '%s'\n", argv[2]); |
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DisplayUsage(); |
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} |
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} |
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} else if (strcmp(argv[1], "help") == 0) { |
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DisplayUsage(); |
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} else { |
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fprintf(stderr, "Unknown mode '%s'\n", argv[1]); |
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DisplayUsage(); |
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} |
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} else { |
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DisplayUsage(); |
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} |
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return mode; |
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} |
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/**
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* Entry point of the program. |
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* |
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* @return 0 |
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*/ |
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int main(int argc, char ** argv) { |
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/* The window to listen */ |
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Window win; |
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/* Reads options and sets global variables */ |
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Mode mode = ParseOptions(argc, argv, &win); |
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Display * dsp = XOpenDisplay(NULL); |
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if (dsp == NULL) { |
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fprintf(stderr, "Unable to open display\n"); |
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exit(1); |
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} |
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switch (mode) { |
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case MODE_LIST: |
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ListAllWindows(dsp); |
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break; |
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case MODE_SPY: |
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if (win == 0) { |
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RegisterAllListeners(dsp); |
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} else { |
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RegisterListener(dsp, win); |
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} |
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WaitForKeys(dsp); |
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break; |
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} |
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XCloseDisplay(dsp); |
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return 0; |
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} |
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