-/* xscreensaver-command, Copyright (c) 1991-1997
- * by Jamie Zawinski <jwz@netscape.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
#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>
-#include <stdlib.h>
+#include <X11/Intrinsic.h> /* only needed to get through xscreensaver.h */
+
+#include "remote.h"
#include "version.h"
#ifdef _VROOT_H_
ERROR! you must not include vroot.h in this file
#endif
+char *progname;
+
+Atom XA_VROOT;
+Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_RESPONSE;
+Atom XA_SCREENSAVER_ID, XA_SCREENSAVER_TIME, XA_SELECT, XA_DEMO;
+static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV, XA_EXIT;
+static Atom XA_RESTART, XA_PREFS, XA_LOCK;
+
static char *screensaver_version;
-static char *usage = "usage: %s -<switch>\n\
+static char *usage = "\n\
+usage: %s -<option>\n\
\n\
This program provides external control of a running xscreensaver process.\n\
- Version %s, copyright (c) 1991-1997 Jamie Zawinski <jwz@netscape.com>.\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\
- -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 graphics 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 could be used for looking at a demo\n\
- of each of the configured hacks.\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\
- -exit Causes the screensaver process to exit. This is the same as\n\
- killing the process with `kill', but it's easier, since you\n\
- don't need to first figure out the pid. (Note that one\n\
- must *never* kill xscreensaver with -9!)\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. Do this after you've\n\
- changed the resource database, to cause the screensaver to\n\
- notice the changes.\n\
- -lock Same as -activate, but with immediate locking.\n\
- -version Prints the version of XScreenSaver that is currently running\n\
- on the display.\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.)\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://people.netscape.com/jwz/xscreensaver/\n\
+ For updates, check http://www.jwz.org/xscreensaver/\n\
\n";
-static Window
-find_screensaver_window (Display *dpy, char *progname, 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;
-
- if (XGetWindowProperty (dpy, kids[i],
- XInternAtom (dpy, "_SCREENSAVER_VERSION", False),
- 0, 200, False, XA_STRING,
- &type, &format, &nitems, &bytesafter,
- (unsigned char **) &v)
- == Success
- && type != None)
- {
- if (version)
- *version = v;
- return kids[i];
- }
- }
- fprintf (stderr, "%s: no screensaver is running on display %s\n", progname,
- DisplayString (dpy));
- exit (1);
-}
-
-
-#define USAGE() \
- { fprintf (stderr, usage, argv[0], screensaver_version); exit (1); }
+#define USAGE() do { \
+ fprintf (stderr, usage, progname, screensaver_version); exit (1); \
+ } while(0)
int
main (int argc, char **argv)
{
Display *dpy;
- Window window;
int i;
- int query = 0;
-#define Q_version 1
-#define Q_time 2
- char *message = 0, *dpyname = 0;
- char *v = 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 (!strncmp (s, "-version", L)) query = Q_version;
- else if (!strncmp (s, "-time", L)) query = Q_time;
+ 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 || cmd == &XA_DEMO)
+ {
+ long a;
+ char c;
+ if (i+1 < argc && (1 == sscanf(argv[i+1], " %ld %c", &a, &c)))
+ {
+ arg = a;
+ i++;
+ }
+ }
}
- if (!message && !query) USAGE ();
- if (!dpyname) dpyname = (char *) getenv ("DISPLAY");
- dpy = XOpenDisplay (dpyname);
- if (!dpy)
+
+ if (!cmd)
+ USAGE ();
+
+ if (arg < 0)
+ /* no command may have a negative argument. */
+ USAGE();
+ else if (arg == 0)
{
- fprintf (stderr, "%s: can't open display %s\n", argv[0],
- (dpyname ? dpyname : "(null)"));
- exit (1);
+ /* SELECT must have a non-zero argument. */
+ if (cmd == &XA_SELECT)
+ USAGE();
}
- window = find_screensaver_window (dpy, argv[0], &v);
-
- if (message)
+ else /* arg > 0 */
{
- XEvent event;
- 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);
- }
+ /* no command other than SELECT and DEMO may have a non-zero argument. */
+ if (cmd != &XA_DEMO && cmd != &XA_SELECT)
+ USAGE();
}
- else if (query)
+
+
+
+ /* For backward compatibility: -demo with no arguments used to send a
+ "DEMO 0" ClientMessage to the xscreensaver process, which brought up
+ the built-in demo mode dialog. Now that the demo mode dialog is no
+ longer built in, we bring it up by just running the "xscreensaver-demo"
+ program.
+
+ Note that "-DEMO <n>" still sends a ClientMessage.
+ */
+ if (cmd == &XA_PREFS ||
+ (cmd == &XA_DEMO && arg == 0))
{
- XClassHint hint;
- memset (&hint, 0, sizeof(hint));
- if (!v || !*v)
- {
- fprintf (stderr, "%s: version property not set on window 0x%x?\n",
- argv [0], (unsigned int) window);
- exit (1);
- }
+ char buf [512];
+ char *new_argv[] = { "xscreensaver-demo", 0, 0, 0, 0, 0 };
+ int ac = 1;
- XGetClassHint(dpy, window, &hint);
- if (!hint.res_class)
+ if (dpyname)
{
- fprintf (stderr, "%s: class hints not set on window 0x%x?\n",
- argv [0], (unsigned int) window);
- exit (1);
+ new_argv[ac++] = "-display";
+ new_argv[ac++] = dpyname;
}
- fprintf (stdout, "%s %s", hint.res_class, v);
+ if (cmd == &XA_PREFS)
+ new_argv[ac++] = "-prefs";
- if (query != Q_time)
- {
- fprintf (stdout, "\n");
- }
- else
- {
- Atom type;
- int format;
- unsigned long nitems, bytesafter;
- unsigned char *data = 0;
- XWindowAttributes xgwa;
- Bool active_p = False;
-
- xgwa.map_state = IsViewable;
- XGetWindowAttributes (dpy, window, &xgwa);
-
- if (XGetWindowProperty (dpy, window,
- XInternAtom (dpy, "__SWM_VROOT", False),
- 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,
- XInternAtom (dpy, "_SCREENSAVER_TIME",False),
- 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, ": active since ");
- else
- fprintf (stdout, ": inactive 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",
- argv[0], (unsigned int) window,
- hint.res_class, (v ? v : "???"));
- exit (1);
- }
- }
+ fflush(stdout);
+ fflush(stderr);
+ execvp (new_argv[0], new_argv); /* shouldn't return */
+
+ sprintf (buf, "%s: could not exec %s", progname, new_argv[0]);
+ perror(buf);
+ fflush(stdout);
+ fflush(stderr);
+ exit (-1);
+ }
+
+
+
+ if (!dpyname) dpyname = (char *) getenv ("DISPLAY");
+ dpy = XOpenDisplay (dpyname);
+ if (!dpy)
+ {
+ fprintf (stderr, "%s: can't open display %s\n", progname,
+ (dpyname ? dpyname : "(null)"));
+ exit (1);
}
+ XA_VROOT = XInternAtom (dpy, "__SWM_VROOT", False);
+ XA_SCREENSAVER = XInternAtom (dpy, "SCREENSAVER", False);
+ XA_SCREENSAVER_ID = XInternAtom (dpy, "_SCREENSAVER_ID", 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);
- fflush (stdout);
- fflush (stderr);
- 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, True);
+ if (i < 0) exit (i);
+ else exit (0);
}