diff -Naur wmclock-1.0.12.2-orig/wmclock.c wmclock-1.0.12.2/wmclock.c

--- wmclock-1.0.12.2-orig/wmclock.c	2000-03-08 09:31:33 +0200

+++ wmclock-1.0.12.2/wmclock.c	2009-01-17 22:35:38 +0200

@@ -20,6 +20,7 @@

  * with the software or the use or other dealings in the software.

  */

+#include <sys/select.h>

 #include <sys/types.h>

 #include <sys/wait.h>

 #include <sys/time.h>

@@ -141,7 +142,8 @@

 Display    *dpy;

 Window     rootWindow;

 int        screen;

-/* int        xFd; */

+int        xFd;

+fd_set     xFdSet;

 int        displayDepth;

 XSizeHints sizeHints;

 XWMHints   wmHints;

@@ -801,6 +803,7 @@

    XTextProperty wmName;

    XClassHint    classHint;

    Pixmap        shapeMask;

+   struct timeval nextEvent;

    /* Parse command line options */

    progName = extractProgName(argv[0]);

@@ -842,7 +845,7 @@

    screen       = DefaultScreen(dpy);

    rootWindow   = RootWindow(dpy, screen);

    displayDepth = DefaultDepth(dpy, screen);

-   /* xFd          = XConnectionNumber(dpy); */

+   xFd          = XConnectionNumber(dpy);

    /* Icon Daten nach XImage konvertieren */

    GetXpms();

@@ -1042,14 +1045,32 @@

 	   poll((struct poll *) 0, (size_t) 0, 50);	/* 5/100 sec */

 	}

 #else

-       if (enableYearDisplay)

-	{

-	   usleep(200000L);	/* 1/5 sec */

-	}

+       //We compute the date of next event, in order to avoid polling

+       if (enableBlinking)

+	 {

+	   gettimeofday(&nextEvent,NULL);

+	   nextEvent.tv_sec = 0;

+	   nextEvent.tv_usec = 1000000-nextEvent.tv_usec;

+	 }

        else

-	{

-	   usleep(50000L);	/* 5/100 sec */

-	}

+	 {

+	   if (enableYearDisplay)

+	     {

+	       nextEvent.tv_sec = 86400-actualTime%86400;

+	       nextEvent.tv_usec = 0;

+	     }

+	   else

+	     {

+	       nextEvent.tv_sec = 60-actualTime%60;

+	       nextEvent.tv_usec = 0;

+	     }

+	 }

+//       printf("xFd %d\n", xFd);

+       FD_ZERO(&xFdSet);

+       FD_SET(xFd,&xFdSet);

+//       printf("debut select %d\n", nextEvent.tv_sec);

+       select(FD_SETSIZE,&xFdSet,NULL,NULL,&nextEvent);

+//       printf("fin select\n");

 #endif

     }

    return(0);