-/* xscreensaver-command, Copyright (c) 1991-1994 Jamie Zawinski <jwz@lucid.com>
+/* xscreensaver-command, Copyright (c) 1991-2004 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"
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
#include <stdio.h>
+#include <stdlib.h>
+#include <time.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 "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_STATUS, XA_SELECT, XA_DEMO, XA_EXIT;
+Atom XA_BLANK, XA_LOCK;
+static Atom XA_ACTIVATE, XA_DEACTIVATE, XA_CYCLE, XA_NEXT, XA_PREV;
+static Atom XA_RESTART, XA_PREFS, XA_THROTTLE, XA_UNTHROTTLE;
+
static char *screensaver_version;
-static char *usage = "usage: %s -<switch>\n\
+# ifdef __GNUC__
+ __extension__ /* don't warn about "string length is greater than the
+ length ISO C89 compilers are required to support" in the
+ usage string... */
+# endif
+static char *usage = "\n\
+usage: %s -<option>\n\
\n\
This program provides external control of a running xscreensaver process.\n\
- Version %s, copyright (c) 1991-1994 Jamie Zawinski <jwz@lucid.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;
-{
- int i;
- Window root = RootWindowOfScreen (DefaultScreenOfDisplay (dpy));
- Window root2, parent, *kids;
- unsigned int nkids;
-
- 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 *version;
-
- if (XGetWindowProperty (dpy, kids[i],
- XInternAtom (dpy, "_SCREENSAVER_VERSION", False),
- 0, 1, False, XA_STRING,
- &type, &format, &nitems, &bytesafter,
- (unsigned char **) &version)
- == Success
- && type != None)
- return kids[i];
- }
- fprintf (stderr, "%s: no screensaver is running on display %s", progname,
- DisplayString (dpy));
- exit (1);
-}
+ Version %s, copyright (c) 1991-2003 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. If the saver is\n\
+ already active, this causes it to be locked as well.\n\
+\n\
+ -throttle Temporarily switch to ``blank screen'' mode, and don't run\n\
+ any display modes at all, until the screensaver is next\n\
+ de-activated. This is useful if you're using a machine\n\
+ remotely, and you find that some display modes are using too\n\
+ much CPU.\n\
+\n\
+ -unthrottle Turn `-throttle' off and resume normal behavior.\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\
+ -watch Prints a line each time the screensaver changes state: when\n\
+ the screen blanks, locks, unblanks, or when the running hack\n\
+ is changed. This option never returns; it is intended for\n\
+ by shell scripts that want to react to the screensaver in\n\
+ some way.\n\
+\n\
+ See the man page for more details.\n\
+ For updates, check http://www.jwz.org/xscreensaver/\n\
+\n";
+#define USAGE() do { \
+ fprintf (stderr, usage, progname, screensaver_version); exit (1); \
+ } while(0)
-#define USAGE() \
- { fprintf (stderr, usage, argv[0], screensaver_version); exit (1); }
+static int watch (Display *);
-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;
+ char *s;
+
+ progname = argv[0];
+ s = strrchr (progname, '/');
+ if (s) progname = s+1;
+
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, "-throttle", L)) cmd = &XA_THROTTLE;
+ else if (!strncmp (s, "-unthrottle", L)) cmd = &XA_UNTHROTTLE;
+ else if (!strncmp (s, "-version", L)) cmd = &XA_SCREENSAVER_VERSION;
+ else if (!strncmp (s, "-time", L)) cmd = &XA_SCREENSAVER_STATUS;
+ else if (!strncmp (s, "-watch", L)) cmd = (Atom *) &watch;
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 (!cmd)
+ USAGE ();
+
+ if (arg < 0)
+ /* no command may have a negative argument. */
+ USAGE();
+ else if (arg == 0)
+ {
+ /* SELECT must have a non-zero argument. */
+ if (cmd == &XA_SELECT)
+ USAGE();
}
- if (! message) USAGE ();
+ else /* arg > 0 */
+ {
+ /* no command other than SELECT and DEMO may have a non-zero argument. */
+ if (cmd != &XA_DEMO && cmd != &XA_SELECT)
+ USAGE();
+ }
+
+
+
+ /* 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))
+ {
+ char buf [512];
+ char *new_argv[] = { "xscreensaver-demo", 0, 0, 0, 0, 0 };
+ int ac = 1;
+
+ if (dpyname)
+ {
+ new_argv[ac++] = "-display";
+ new_argv[ac++] = dpyname;
+ }
+
+ if (cmd == &XA_PREFS)
+ new_argv[ac++] = "-prefs";
+
+ 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");
+
+ if (!dpyname)
+ {
+ dpyname = ":0.0";
+ fprintf (stderr,
+ "%s: warning: $DISPLAY is not set: defaulting to \"%s\".\n",
+ progname, dpyname);
+ }
+
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))
+
+ 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_STATUS = XInternAtom (dpy, "_SCREENSAVER_STATUS", 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);
+ XA_BLANK = XInternAtom (dpy, "BLANK", False);
+ XA_THROTTLE = XInternAtom (dpy, "THROTTLE", False);
+ XA_UNTHROTTLE = XInternAtom (dpy, "UNTHROTTLE", False);
+
+ XSync (dpy, 0);
+
+ if (cmd == (Atom *) &watch)
+ {
+ i = watch (dpy);
+ exit (i);
+ }
+
+ 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, NULL);
+ if (i < 0) exit (i);
+ else exit (0);
+}
+
+
+static int
+watch (Display *dpy)
+{
+ char *v = 0;
+ Window window = RootWindow (dpy, 0);
+ XWindowAttributes xgwa;
+ XEvent event;
+ CARD32 *last = 0;
+
+ if (v) free (v);
+ XGetWindowAttributes (dpy, window, &xgwa);
+ XSelectInput (dpy, window, xgwa.your_event_mask | PropertyChangeMask);
+
+ while (1)
{
- fprintf (stderr, "%s: XSendEvent(dpy, 0x%x ...) failed.\n", argv [0],
- (unsigned int) window);
- exit (1);
+ XNextEvent (dpy, &event);
+ if (event.xany.type == PropertyNotify &&
+ event.xproperty.state == PropertyNewValue &&
+ event.xproperty.atom == XA_SCREENSAVER_STATUS)
+ {
+ Atom type;
+ int format;
+ unsigned long nitems, bytesafter;
+ unsigned char *dataP = 0;
+
+ if (XGetWindowProperty (dpy,
+ RootWindow (dpy, 0), /* always screen #0 */
+ XA_SCREENSAVER_STATUS,
+ 0, 999, False, XA_INTEGER,
+ &type, &format, &nitems, &bytesafter,
+ &dataP)
+ == Success
+ && type
+ && dataP)
+ {
+ time_t tt;
+ char *s;
+ Bool changed = False;
+ Bool running = False;
+ CARD32 *data = (CARD32 *) dataP;
+
+ if (type != XA_INTEGER || nitems < 3)
+ {
+ STATUS_LOSE:
+ if (last) XFree (last);
+ if (data) XFree (data);
+ fprintf (stderr, "%s: bad status format on root window.\n",
+ progname);
+ return -1;
+ }
+
+ tt = (time_t) data[1];
+ if (tt <= (time_t) 666000000L) /* early 1991 */
+ goto STATUS_LOSE;
+
+ s = ctime(&tt);
+ if (s[strlen(s)-1] == '\n')
+ s[strlen(s)-1] = 0;
+
+ if (!last || data[0] != last[0])
+ {
+ /* State changed. */
+ if (data[0] == XA_BLANK)
+ printf ("BLANK %s\n", s);
+ else if (data[0] == XA_LOCK)
+ printf ("LOCK %s\n", s);
+ else if (data[0] == 0)
+ printf ("UNBLANK %s\n", s);
+ else
+ goto STATUS_LOSE;
+ }
+
+ if (!last)
+ changed = True;
+ else
+ {
+ int i;
+ for (i = 2; i < nitems; i++)
+ {
+ if (data[i] != last[i])
+ changed = True;
+ if (data[i])
+ running = True;
+ }
+ }
+
+ if (running && changed)
+ {
+ int i;
+ fprintf (stdout, "RUN");
+ for (i = 2; i < nitems; i++)
+ fprintf (stdout, " %d", (int) data[i]);
+ fprintf (stdout, "\n");
+ }
+
+ fflush (stdout);
+
+ if (last) XFree (last);
+ last = data;
+ }
+ else
+ {
+ if (last) XFree (last);
+ if (dataP) XFree (dataP);
+ fprintf (stderr, "%s: no saver status on root window.\n",
+ progname);
+ return -1;
+ }
+ }
}
- XSync (dpy, 0);
- exit (0);
}
projects / xscreensaver / blobdiff