--- /dev/null
+/* xscreensaver-command, Copyright (c) 1991-1998
+ * by Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/types.h>
+
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif /* HAVE_SYS_SELECT_H */
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#include <X11/Xproto.h> /* for CARD32 */
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <X11/Xutil.h> /* for XGetClassHint() */
+#include <X11/Xos.h>
+
+#include "remote.h"
+
+#ifdef _VROOT_H_
+ERROR! you must not include vroot.h in this file
+#endif
+
+extern char *progname;
+extern Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_RESPONSE;
+extern Atom XA_SCREENSAVER_ID, XA_SCREENSAVER_TIME;
+extern Atom XA_VROOT, XA_SELECT, XA_DEMO;
+
+
+static XErrorHandler old_handler = 0;
+static Bool got_badwindow = False;
+static int
+BadWindow_ehandler (Display *dpy, XErrorEvent *error)
+{
+ if (error->error_code == BadWindow)
+ {
+ got_badwindow = True;
+ return 0;
+ }
+ else
+ {
+ fprintf (stderr, "%s: ", progname);
+ if (!old_handler) abort();
+ return (*old_handler) (dpy, error);
+ }
+}
+
+
+
+static Window
+find_screensaver_window (Display *dpy, char **version)
+{
+ int i;
+ Window root = RootWindowOfScreen (DefaultScreenOfDisplay (dpy));
+ Window root2, parent, *kids;
+ unsigned int nkids;
+
+ if (version) *version = 0;
+
+ if (! XQueryTree (dpy, root, &root2, &parent, &kids, &nkids))
+ abort ();
+ if (root != root2)
+ abort ();
+ if (parent)
+ abort ();
+ if (! (kids && nkids))
+ abort ();
+ for (i = 0; i < nkids; i++)
+ {
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+ char *v;
+ int status;
+
+ /* We're walking the list of root-level windows and trying to find
+ the one that has a particular property on it. We need to trap
+ BadWindows errors while doing this, because it's possible that
+ some random window might get deleted in the meantime. (That
+ window won't have been the one we're looking for.)
+ */
+ XSync (dpy, False);
+ if (old_handler) abort();
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ status = XGetWindowProperty (dpy, kids[i],
+ XA_SCREENSAVER_VERSION,
+ 0, 200, False, XA_STRING,
+ &type, &format, &nitems, &bytesafter,
+ (unsigned char **) &v);
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ old_handler = 0;
+
+ if (got_badwindow)
+ status = BadWindow;
+
+ if (status == Success && type != None)
+ {
+ if (version)
+ *version = v;
+ return kids[i];
+ }
+ }
+ fprintf (stderr, "%s: no screensaver is running on display %s\n", progname,
+ DisplayString (dpy));
+ return 0;
+}
+
+
+static int
+send_xscreensaver_command (Display *dpy, Atom command, long arg,
+ Window *window_ret)
+{
+ char *v = 0;
+ Window window = find_screensaver_window (dpy, &v);
+ XWindowAttributes xgwa;
+
+ if (window_ret)
+ *window_ret = window;
+
+ if (!window)
+ return -1;
+
+ /* Select for property change events, so that we can read the response. */
+ XGetWindowAttributes (dpy, window, &xgwa);
+ XSelectInput (dpy, window, xgwa.your_event_mask | PropertyChangeMask);
+
+ if (command == XA_SCREENSAVER_TIME ||
+ command == XA_SCREENSAVER_VERSION)
+ {
+ XClassHint hint;
+ memset (&hint, 0, sizeof(hint));
+ if (!v || !*v)
+ {
+ fprintf (stderr, "%s: version property not set on window 0x%x?\n",
+ progname, (unsigned int) window);
+ return -1;
+ }
+
+ XGetClassHint(dpy, window, &hint);
+ if (!hint.res_class)
+ {
+ fprintf (stderr, "%s: class hints not set on window 0x%x?\n",
+ progname, (unsigned int) window);
+ return -1;
+ }
+
+ fprintf (stdout, "%s %s", hint.res_class, v);
+
+ if (command != XA_SCREENSAVER_TIME)
+ {
+ fprintf (stdout, "\n");
+ }
+ else
+ {
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+ unsigned char *data = 0;
+ Bool active_p = False;
+
+ if (XGetWindowProperty (dpy, window, XA_VROOT,
+ 0, 0, False, XA_WINDOW,
+ &type, &format, &nitems, &bytesafter,
+ &data)
+ == Success
+ && type != None)
+ active_p = True;
+
+ if (data) free (data);
+ data = 0;
+
+ if (XGetWindowProperty (dpy, window,
+ XA_SCREENSAVER_TIME,
+ 0, 1, False, XA_INTEGER,
+ &type, &format, &nitems, &bytesafter,
+ &data)
+ == Success
+ && type == XA_INTEGER
+ && data)
+ {
+ CARD32 time32 = *((CARD32 *)data);
+ time_t tt = (time_t) time32;
+
+ if (active_p)
+ fprintf (stdout, ": screen blanked since ");
+ else
+ /* suggestions for a better way to phrase this are welcome. */
+ fprintf (stdout, ": screen non-blanked since ");
+ fprintf (stdout, "%s", ctime(&tt));
+ if (data) free (data);
+ }
+ else
+ {
+ if (data) free (data);
+ fprintf (stdout, "\n");
+ fflush (stdout);
+ fprintf (stderr, "%s: no time on window 0x%x (%s %s).\n",
+ progname, (unsigned int) window,
+ hint.res_class, (v ? v : "???"));
+ return -1;
+ }
+ }
+
+ /* No need to read a response for these commands. */
+ return 1;
+ }
+ else
+ {
+ XEvent event;
+ long arg1 = arg;
+ long arg2 = 0;
+
+ if (arg < 0)
+ abort();
+ else if (arg == 0 && command == XA_SELECT)
+ abort();
+ else if (arg != 0 && command == XA_DEMO)
+ {
+ arg1 = 300; /* version number of the XA_DEMO protocol, */
+ arg2 = arg; /* since it didn't use to take an argument. */
+ }
+
+ event.xany.type = ClientMessage;
+ event.xclient.display = dpy;
+ event.xclient.window = window;
+ event.xclient.message_type = XA_SCREENSAVER;
+ event.xclient.format = 32;
+ memset (&event.xclient.data, 0, sizeof(event.xclient.data));
+ event.xclient.data.l[0] = (long) command;
+ event.xclient.data.l[1] = arg1;
+ event.xclient.data.l[2] = arg2;
+ if (! XSendEvent (dpy, window, False, 0L, &event))
+ {
+ fprintf (stderr, "%s: XSendEvent(dpy, 0x%x ...) failed.\n",
+ progname, (unsigned int) window);
+ return -1;
+ }
+ }
+ XSync (dpy, 0);
+ return 0;
+}
+
+
+static int
+xscreensaver_command_response (Display *dpy, Window window, Bool verbose_p)
+{
+ int fd = ConnectionNumber (dpy);
+ int timeout = 10;
+ int status;
+ fd_set fds;
+ struct timeval tv;
+
+ while (1)
+ {
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+ memset(&tv, 0, sizeof(tv));
+ tv.tv_sec = timeout;
+ status = select (fd+1, &fds, 0, &fds, &tv);
+
+ if (status < 0)
+ {
+ char buf[1024];
+ sprintf (buf, "%s: waiting for reply", progname);
+ perror (buf);
+ return status;
+ }
+ else if (status == 0)
+ {
+ fprintf (stderr, "%s: no response to command.\n", progname);
+ return -1;
+ }
+ else
+ {
+ XEvent event;
+ XNextEvent (dpy, &event);
+ if (event.xany.type == PropertyNotify &&
+ event.xproperty.state == PropertyNewValue &&
+ event.xproperty.atom == XA_SCREENSAVER_RESPONSE)
+ {
+ Status st2;
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+ char *msg = 0;
+
+ XSync (dpy, False);
+ if (old_handler) abort();
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ st2 = XGetWindowProperty (dpy, window,
+ XA_SCREENSAVER_RESPONSE,
+ 0, 1024, True,
+ AnyPropertyType,
+ &type, &format, &nitems, &bytesafter,
+ (unsigned char **) &msg);
+ XSync (dpy, False);
+ XSetErrorHandler (old_handler);
+ old_handler = 0;
+
+ if (got_badwindow)
+ {
+ fprintf (stdout,
+ "%s: xscreensaver window has been deleted.\n",
+ progname);
+ return 0;
+ }
+
+ if (st2 == Success && type != None)
+ {
+ if (type != XA_STRING || format != 8)
+ {
+ fprintf (stderr,
+ "%s: unrecognized response property.\n",
+ progname);
+ if (msg) XFree (msg);
+ return -1;
+ }
+ else if (!msg || (msg[0] != '+' && msg[0] != '-'))
+ {
+ fprintf (stderr,
+ "%s: unrecognized response message.\n",
+ progname);
+ if (msg) XFree (msg);
+ return -1;
+ }
+ else
+ {
+ int ret = (msg[0] == '+' ? 0 : -1);
+ if (verbose_p || ret != 0)
+ fprintf ((ret < 0 ? stderr : stdout),
+ "%s: %s\n",
+ progname,
+ msg+1);
+ XFree (msg);
+ return ret;
+ }
+ }
+ }
+ }
+ }
+}
+
+
+int
+xscreensaver_command (Display *dpy, Atom command, long arg, Bool verbose_p)
+{
+ Window w = 0;
+ int status = send_xscreensaver_command (dpy, command, arg, &w);
+ if (status == 0)
+ status = xscreensaver_command_response (dpy, w, verbose_p);
+ fflush (stdout);
+ fflush (stderr);
+ return status;
+}
+
+
+void
+server_xscreensaver_version (Display *dpy,
+ char **version_ret,
+ char **user_ret,
+ char **host_ret)
+{
+ Window window = find_screensaver_window (dpy, 0);
+
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+
+ if (version_ret)
+ *version_ret = 0;
+ if (user_ret)
+ *user_ret = 0;
+ if (host_ret)
+ *host_ret = 0;
+
+ if (!window)
+ return;
+
+ if (version_ret)
+ {
+ char *v = 0;
+ XGetWindowProperty (dpy, window, XA_SCREENSAVER_VERSION, 0, 1,
+ False, XA_STRING, &type, &format, &nitems,
+ &bytesafter, (unsigned char **) &v);
+ if (v)
+ {
+ *version_ret = strdup (v);
+ XFree (v);
+ }
+ }
+
+ if (user_ret || host_ret)
+ {
+ char *id = 0;
+ const char *user = 0;
+ const char *host = 0;
+
+ XGetWindowProperty (dpy, window, XA_SCREENSAVER_ID, 0, 512,
+ False, XA_STRING, &type, &format, &nitems,
+ &bytesafter, (unsigned char **) &id);
+ if (id && *id)
+ {
+ const char *old_tag = " on host ";
+ const char *s = strstr (id, old_tag);
+ if (s)
+ {
+ /* found ID of the form "1234 on host xyz". */
+ user = 0;
+ host = s + strlen (old_tag);
+ }
+ else
+ {
+ char *o = 0, *p = 0, *c = 0;
+ o = strchr (id, '(');
+ if (o) p = strchr (o, '@');
+ if (p) c = strchr (p, ')');
+ if (c)
+ {
+ /* found ID of the form "1234 (user@host)". */
+ user = o+1;
+ host = p+1;
+ *p = 0;
+ *c = 0;
+ }
+ }
+
+ }
+
+ if (user && *user && *user != '?')
+ *user_ret = strdup (user);
+ else
+ *user_ret = 0;
+
+ if (host && *host && *host != '?')
+ *host_ret = strdup (host);
+ else
+ *host_ret = 0;
+
+ if (id)
+ XFree (id);
+ }
+}
projects / xscreensaver / blobdiff