-/* xscreensaver-command, Copyright (c) 1991-1995 Jamie Zawinski <jwz@mcom.com>
+/* 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
* implied warranty.
*/
-#include "version.h"
+#define STANDALONE
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/types.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>
-#if __STDC__
-# include <stdlib.h>
-#endif
+
+#include <X11/Intrinsic.h> /* only needed to get through xscreensaver.h */
+
+#include "version.h"
+
+#ifdef STANDALONE
+ static char *progname;
+ static Atom XA_VROOT;
+ static Atom XA_SCREENSAVER, XA_SCREENSAVER_RESPONSE, XA_SCREENSAVER_VERSION;
+ static Atom XA_SCREENSAVER_TIME, XA_SELECT;
+#else /* !STANDALONE */
+# include "xscreensaver.h"
+#endif /* !STANDALONE */
+
#ifdef _VROOT_H_
ERROR! you must not include vroot.h in this file
#endif
-static char *screensaver_version;
-static char *usage = "usage: %s -<switch>\n\
-\n\
- This program provides external control of a running xscreensaver process.\n\
- Version %s, copyright (c) 1991-1994 Jamie Zawinski <jwz@mcom.com>.\n\
-\n\
- -demo Enter interactive demo mode.\n\
- -deactivate Turns off the screensaver if it is on, as user input would.\n\
- -activate Turns it on as if the user had been idle for long enough.\n\
- -cycle Stops the current hack and runs a new one.\n\
- -next Like either -activate or -cycle, depending on which is more\n\
- appropriate, except that the screenhack that will be run is\n\
- the next one in the list of hacks, instead of a randomly-\n\
- chosen one. This option is good for looking at a demo of\n\
- each of the hacks in place.\n\
- -prev Like -next, but goes in the other direction.\n\
- -exit Causes the screensaver process to exit. It should be ok to\n\
- just kill the process (NOT with -9!) but this is a slightly\n\
- easier way.\n\
- -restart Causes the screensaver process to exit and then restart with\n\
- the same command line arguments. This is a good way of \n\
- causing the screensaver to re-read the resource database.\n\
- -lock Same as -activate, but with immediate locking.\n\
-\n\
- See the man page for more details.\n\n";
+
static Window
-find_screensaver_window (dpy, progname)
- Display *dpy;
- char *progname;
+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)
Atom type;
int format;
unsigned long nitems, bytesafter;
- char *version;
+ char *v;
if (XGetWindowProperty (dpy, kids[i],
- XInternAtom (dpy, "_SCREENSAVER_VERSION", False),
- 0, 1, False, XA_STRING,
+ XA_SCREENSAVER_VERSION,
+ 0, 200, False, XA_STRING,
&type, &format, &nitems, &bytesafter,
- (unsigned char **) &version)
+ (unsigned char **) &v)
== Success
&& type != None)
- return kids[i];
+ {
+ if (version)
+ *version = v;
+ return kids[i];
+ }
}
fprintf (stderr, "%s: no screensaver is running on display %s\n", progname,
DisplayString (dpy));
- exit (1);
+ return 0;
+}
+
+
+static int
+send_xscreensaver_command (Display *dpy, Atom command, long argument,
+ 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 = (command == XA_SELECT ? argument : 0L);
+ 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;
+ 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 XErrorHandler old_handler = 0;
+static Bool got_badwindow = False;
+static int
+BadWindow_ehandler (Display *dpy, XErrorEvent *error)
+{
+ /* When we notice a window being created, we spawn a timer that waits
+ 30 seconds or so, and then selects events on that window. This error
+ handler is used so that we can cope with the fact that the window
+ may have been destroyed <30 seconds after it was created.
+ */
+ if (error->error_code == BadWindow)
+ {
+ got_badwindow = True;
+ return 0;
+ }
+ else
+ {
+ fprintf (stderr, "%s: ", progname);
+ return (*old_handler) (dpy, error);
+ }
}
+static int
+xscreensaver_command_response (Display *dpy, Window window)
+{
+ 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);
+ switch (event.xany.type) {
+ case PropertyNotify:
+ if (event.xproperty.state == PropertyNewValue &&
+ event.xproperty.atom == XA_SCREENSAVER_RESPONSE)
+ {
+ Status st2;
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+ char *msg = 0;
+
+ old_handler = XSetErrorHandler (BadWindow_ehandler);
+ XSync (dpy, False);
+
+ st2 = XGetWindowProperty (dpy, window,
+ XA_SCREENSAVER_RESPONSE,
+ 0, 1024, True,
+ AnyPropertyType,
+ &type, &format, &nitems, &bytesafter,
+ (unsigned char **) &msg);
+
+ 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);
+ fprintf ((ret < 0 ? stderr : stdout),
+ "%s: %s\n",
+ progname,
+ msg+1);
+ XFree (msg);
+ return ret;
+ }
+ }
+ }
+ break;
+
+ default:
+ fprintf (stderr, "%s: got unexpected response event %d.\n",
+ progname, event.xany.type);
+ return -1;
+ break;
+ }
+ }
+ }
+}
+
+
+int
+xscreensaver_command (Display *dpy, Atom command, long argument)
+{
+ Window w = 0;
+ int status = send_xscreensaver_command (dpy, command, argument, &w);
+ if (status == 0)
+ status = xscreensaver_command_response (dpy, w);
+ fflush (stdout);
+ fflush (stderr);
+ return status;
+}
+
+\f
+#ifdef STANDALONE
+static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV;
+static Atom XA_EXIT, XA_RESTART, XA_DEMO, XA_PREFS, XA_LOCK;
+
+static char *progname;
+static char *screensaver_version;
+static char *usage = "\n\
+usage: %s -<option>\n\
+\n\
+ This program provides external control of a running xscreensaver process.\n\
+ Version %s, copyright (c) 1991-1998 Jamie Zawinski <jwz@jwz.org>.\n\
+\n\
+ The xscreensaver program is a daemon that runs in the background.\n\
+ You control a running xscreensaver process by sending it messages\n\
+ with this program, xscreensaver-command. See the man pages for\n\
+ details. These are the arguments understood by xscreensaver-command:\n\
+\n\
+ -demo Ask the xscreensaver process to enter interactive demo mode.\n\
+\n\
+ -prefs Ask the xscreensaver process to bring up the preferences\n\
+ panel.\n\
+\n\
+ -activate Turn on the screensaver (blank the screen), as if the user\n\
+ had been idle for long enough.\n\
+\n\
+ -deactivate Turns off the screensaver (un-blank the screen), as if user\n\
+ activity had been detected.\n\
+\n\
+ -cycle If the screensaver is active (the screen is blanked), then\n\
+ stop the current graphics demo and run a new one (chosen\n\
+ randomly.)\n\
+\n\
+ -next Like either -activate or -cycle, depending on which is more\n\
+ appropriate, except that the graphics hack that will be run\n\
+ is the next one in the list, instead of a randomly-chosen\n\
+ one. In other words, repeatedly executing -next will cause\n\
+ the xscreensaver process to invoke each graphics demo\n\
+ sequentially. (Though using the -demo option is probably\n\
+ an easier way to accomplish that.)\n\
+\n\
+ -prev Like -next, but goes in the other direction.\n\
+\n\
+ -select <N> Like -activate, but runs the Nth element in the list of\n\
+ hacks. By knowing what is in the `programs' list, and in\n\
+ what order, you can use this to activate the screensaver\n\
+ with a particular graphics demo. (The first element in the\n\
+ list is numbered 1, not 0.)\n\
+\n\
+ -exit Causes the xscreensaver process to exit gracefully. This is\n\
+ roughly the same as killing the process with `kill', but it\n\
+ is easier, since you don't need to first figure out the pid.\n\
+ (Note that one must *never* kill xscreensaver with -9!)\n\
+\n\
+ -restart Causes the screensaver process to exit and then restart with\n\
+ the same command line arguments as last time. Do this after\n\
+ you've changed your X resource settings, to cause\n\
+ xscreensaver to notice the changes.\n\
+\n\
+ -lock Tells the running xscreensaver process to lock the screen\n\
+ immediately. This is like -activate, but forces locking as\n\
+ well, even if locking is not the default.\n\
+\n\
+ -version Prints the version of xscreensaver that is currently running\n\
+ on the display -- that is, the actual version number of the\n\
+ running xscreensaver background process, rather than the\n\
+ version number of xscreensaver-command.\n\
+\n\
+ -time Prints the time at which the screensaver last activated or\n\
+ deactivated (roughly, how long the user has been idle or\n\
+ non-idle -- but not quite, since it only tells you when the\n\
+ screen became blanked or un-blanked.)\n\
+\n\
+ See the man page for more details.\n\
+ For updates, check http://www.jwz.org/xscreensaver/\n\
+\n";
+
#define USAGE() \
- { fprintf (stderr, usage, argv[0], screensaver_version); exit (1); }
+ { fprintf (stderr, usage, progname, screensaver_version); exit (1); }
-void
-main (argc, argv)
- int argc;
- char **argv;
+int
+main (int argc, char **argv)
{
Display *dpy;
- Window window;
- XEvent event;
int i;
- char *message = 0, *dpyname = 0;
+ char *dpyname = 0;
+ Atom *cmd = 0;
+ long arg = 0L;
+
+ progname = argv[0];
screensaver_version = (char *) malloc (5);
memcpy (screensaver_version, screensaver_id + 17, 4);
screensaver_version [4] = 0;
+
for (i = 1; i < argc; i++)
{
- char *s = argv [i];
- int L = strlen (s);
+ const char *s = argv [i];
+ int L;
+ if (s[0] == '-' && s[1] == '-') s++;
+ L = strlen (s);
if (L < 2) USAGE ();
if (!strncmp (s, "-display", L)) dpyname = argv [++i];
- else if (message) USAGE ()
- else if (!strncmp (s, "-activate", L)) message = "ACTIVATE";
- else if (!strncmp (s, "-deactivate", L)) message = "DEACTIVATE";
- else if (!strncmp (s, "-cycle", L)) message = "CYCLE";
- else if (!strncmp (s, "-next", L)) message = "NEXT";
- else if (!strncmp (s, "-prev", L)) message = "PREV";
- else if (!strncmp (s, "-exit", L)) message = "EXIT";
- else if (!strncmp (s, "-restart", L)) message = "RESTART";
- else if (!strncmp (s, "-demo", L)) message = "DEMO";
- else if (!strncmp (s, "-lock", L)) message = "LOCK";
+ else if (cmd) USAGE ()
+ else if (!strncmp (s, "-activate", L)) cmd = &XA_ACTIVATE;
+ else if (!strncmp (s, "-deactivate", L)) cmd = &XA_DEACTIVATE;
+ else if (!strncmp (s, "-cycle", L)) cmd = &XA_CYCLE;
+ else if (!strncmp (s, "-next", L)) cmd = &XA_NEXT;
+ else if (!strncmp (s, "-prev", L)) cmd = &XA_PREV;
+ else if (!strncmp (s, "-select", L)) cmd = &XA_SELECT;
+ else if (!strncmp (s, "-exit", L)) cmd = &XA_EXIT;
+ else if (!strncmp (s, "-restart", L)) cmd = &XA_RESTART;
+ else if (!strncmp (s, "-demo", L)) cmd = &XA_DEMO;
+ else if (!strncmp (s, "-preferences",L)) cmd = &XA_PREFS;
+ else if (!strncmp (s, "-prefs",L)) cmd = &XA_PREFS;
+ else if (!strncmp (s, "-lock", L)) cmd = &XA_LOCK;
+ else if (!strncmp (s, "-version", L)) cmd = &XA_SCREENSAVER_VERSION;
+ else if (!strncmp (s, "-time", L)) cmd = &XA_SCREENSAVER_TIME;
else USAGE ();
+
+ if (cmd == &XA_SELECT)
+ {
+ char junk;
+ i++;
+ if (i >= argc ||
+ (1 != sscanf(argv[i], " %ld %c", &arg, &junk)))
+ USAGE ();
+ }
}
- if (! message) USAGE ();
+ if (!cmd)
+ USAGE ();
+
if (!dpyname) dpyname = (char *) getenv ("DISPLAY");
dpy = XOpenDisplay (dpyname);
if (!dpy)
{
- fprintf (stderr, "%s: can't open display %s\n", argv[0],
+ fprintf (stderr, "%s: can't open display %s\n", progname,
(dpyname ? dpyname : "(null)"));
exit (1);
}
- window = find_screensaver_window (dpy, argv[0]);
-
- event.xany.type = ClientMessage;
- event.xclient.display = dpy;
- event.xclient.window = window;
- event.xclient.message_type = XInternAtom (dpy, "SCREENSAVER", False);
- event.xclient.format = 32;
- event.xclient.data.l[0] = (long) XInternAtom (dpy, message, False);
- if (! XSendEvent (dpy, window, False, 0L, &event))
- {
- fprintf (stderr, "%s: XSendEvent(dpy, 0x%x ...) failed.\n", argv [0],
- (unsigned int) window);
- exit (1);
- }
+
+ XA_VROOT = XInternAtom (dpy, "__SWM_VROOT", False);
+ XA_SCREENSAVER = XInternAtom (dpy, "SCREENSAVER", False);
+ XA_SCREENSAVER_VERSION = XInternAtom (dpy, "_SCREENSAVER_VERSION",False);
+ XA_SCREENSAVER_TIME = XInternAtom (dpy, "_SCREENSAVER_TIME", False);
+ XA_SCREENSAVER_RESPONSE = XInternAtom (dpy, "_SCREENSAVER_RESPONSE", False);
+ XA_ACTIVATE = XInternAtom (dpy, "ACTIVATE", False);
+ XA_DEACTIVATE = XInternAtom (dpy, "DEACTIVATE", False);
+ XA_RESTART = XInternAtom (dpy, "RESTART", False);
+ XA_CYCLE = XInternAtom (dpy, "CYCLE", False);
+ XA_NEXT = XInternAtom (dpy, "NEXT", False);
+ XA_PREV = XInternAtom (dpy, "PREV", False);
+ XA_SELECT = XInternAtom (dpy, "SELECT", False);
+ XA_EXIT = XInternAtom (dpy, "EXIT", False);
+ XA_DEMO = XInternAtom (dpy, "DEMO", False);
+ XA_PREFS = XInternAtom (dpy, "PREFS", False);
+ XA_LOCK = XInternAtom (dpy, "LOCK", False);
+
XSync (dpy, 0);
- exit (0);
+
+ if (*cmd == XA_ACTIVATE || *cmd == XA_LOCK ||
+ *cmd == XA_NEXT || *cmd == XA_PREV || *cmd == XA_SELECT)
+ /* People never guess that KeyRelease deactivates the screen saver too,
+ so if we're issuing an activation command, wait a second. */
+ sleep (1);
+
+ i = xscreensaver_command (dpy, *cmd, arg);
+ if (i < 0) exit (i);
+ else exit (0);
}
+
+#endif /* STANDALONE */
projects / xscreensaver / blobdiff