-/* xscreensaver-command, Copyright (c) 1991-1998
- * by Jamie Zawinski <jwz@jwz.org>
+/* 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.
*/
-#define STANDALONE
-
#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>
#include <X11/Intrinsic.h> /* only needed to get through xscreensaver.h */
+#include "remote.h"
#include "version.h"
-#ifdef STANDALONE
- static char *progname;
- static Atom XA_VROOT;
- static Atom XA_SCREENSAVER, XA_SCREENSAVER_VERSION, XA_SCREENSAVER_TIME;
-#else /* !STANDALONE */
-# include "xscreensaver.h"
-#endif /* !STANDALONE */
-
-
#ifdef _VROOT_H_
ERROR! you must not include vroot.h in this file
#endif
-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;
-
- if (XGetWindowProperty (dpy, kids[i],
- XA_SCREENSAVER_VERSION,
- 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);
-}
-
-
-void
-xscreensaver_command (Display *dpy, Atom command)
-{
- char *v = 0;
- Window window = find_screensaver_window (dpy, &v);
-
- 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);
- exit (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);
- exit (1);
- }
-
- fprintf (stdout, "%s %s", hint.res_class, v);
+char *progname;
- if (command != XA_SCREENSAVER_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, 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 : "???"));
- exit (1);
- }
- }
- }
- else
- {
- XEvent event;
- event.xany.type = ClientMessage;
- event.xclient.display = dpy;
- event.xclient.window = window;
- event.xclient.message_type = XA_SCREENSAVER;
- event.xclient.format = 32;
- event.xclient.data.l[0] = (long) command;
- if (! XSendEvent (dpy, window, False, 0L, &event))
- {
- fprintf (stderr, "%s: XSendEvent(dpy, 0x%x ...) failed.\n",
- progname, (unsigned int) window);
- exit (1);
- }
- }
- XSync (dpy, 0);
-}
-
-
-\f
-#ifdef STANDALONE
+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_EXIT, XA_RESTART, XA_DEMO, XA_PREFS, XA_LOCK;
+static Atom XA_RESTART, XA_PREFS, XA_THROTTLE, XA_UNTHROTTLE;
-static char *progname;
static char *screensaver_version;
+# 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) 1991-1998 Jamie Zawinski <jwz@jwz.org>.\n\
+ 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\
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\
\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\
+ 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\
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() \
- { fprintf (stderr, usage, progname, screensaver_version); exit (1); }
+#define USAGE() do { \
+ fprintf (stderr, usage, progname, screensaver_version); exit (1); \
+ } while(0)
+
+static int watch (Display *);
int
main (int argc, char **argv)
int i;
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;
L = strlen (s);
if (L < 2) USAGE ();
if (!strncmp (s, "-display", L)) dpyname = argv [++i];
- else if (cmd) USAGE ()
+ 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_TIME;
+ 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();
+ }
+ 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)
{
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_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_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);
- xscreensaver_command(dpy, *cmd);
-
- fflush (stdout);
- fflush (stderr);
- exit (0);
+ i = xscreensaver_command (dpy, *cmd, arg, True, NULL);
+ if (i < 0) exit (i);
+ else exit (0);
}
-#endif /* STANDALONE */
+
+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)
+ {
+ 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;
+ }
+ }
+ }
+}
projects / xscreensaver / blobdiff