-/* 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
#include <stdio.h>
#include <stdlib.h>
+#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
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;
+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;
+# 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\
\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\
fprintf (stderr, usage, progname, screensaver_version); exit (1); \
} while(0)
+static int watch (Display *);
+
int
main (int argc, char **argv)
{
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;
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)
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_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_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);
+ 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)
+ {
+ 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