http://packetstormsecurity.org/UNIX/admin/xscreensaver-3.28.tar.gz

[xscreensaver] / driver / dpms.c

diff --git a/driver/dpms.c b/driver/dpms.c
new file mode 100644 (file)
index 0000000..570c234
--- /dev/null
+++ b/driver/dpms.c
@@ -0,0 +1,137 @@
+/* dpms.c --- syncing the X Display Power Management values
+ * xscreensaver, Copyright (c) 2001 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
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation.  No representations are made about the suitability of this
+ * software for any purpose.  It is provided "as is" without express or 
+ * implied warranty.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+#include <X11/Xlib.h>
+
+#ifdef HAVE_DPMS_EXTENSION
+
+# include <X11/Xproto.h>
+# include <X11/extensions/dpms.h>
+# include <X11/extensions/dpmsstr.h>
+
+  /* Why this crap is not in a header file somewhere, I have no idea.  Losers!
+   */
+  extern Bool DPMSQueryExtension (Display *dpy, int *event_ret, int *err_ret);
+  extern Bool DPMSCapable (Display *dpy);
+  extern Status DPMSInfo (Display *dpy, CARD16 *power_level, BOOL *state);
+  extern Status DPMSSetTimeouts (Display *dpy,
+                                 CARD16 standby, CARD16 suspend, CARD16 off);
+  extern Bool DPMSGetTimeouts (Display *dpy,
+                               CARD16 *standby, CARD16 *suspend, CARD16 *off);
+  extern Status DPMSEnable (Display *dpy);
+  extern Status DPMSDisable (Display *dpy);
+
+#endif /* HAVE_DPMS_EXTENSION */
+
+
+/* This file doesn't need the Xt headers, so stub these types out... */
+#undef XtPointer
+#define XtAppContext void*
+#define XrmDatabase  void*
+#define XtIntervalId void*
+#define XtPointer    void*
+#define Widget       void*
+
+#include "xscreensaver.h"
+
+void
+sync_server_dpms_settings (Display *dpy, Bool enabled_p,
+                           int standby_secs, int suspend_secs, int off_secs,
+                           Bool verbose_p)
+{
+# ifdef HAVE_DPMS_EXTENSION
+
+  int event = 0, error = 0;
+  BOOL o_enabled = False;
+  CARD16 o_power = 0;
+  CARD16 o_standby = 0, o_suspend = 0, o_off = 0;
+
+  Bool bogus_p = (standby_secs == 0 || suspend_secs == 0 || off_secs == 0);
+
+  if (bogus_p) enabled_p = False;
+
+  if (! DPMSQueryExtension (dpy, &event, &error))
+    {
+      if (verbose_p)
+        fprintf (stderr, "%s: XDPMS extension not supported.\n", blurb());
+      return;
+    }
+
+  if (! DPMSCapable (dpy))
+    {
+      if (verbose_p)
+        fprintf (stderr, "%s: DPMS not supported.\n", blurb());
+      return;
+    }
+
+  if (! DPMSInfo (dpy, &o_power, &o_enabled))
+    {
+      if (verbose_p)
+        fprintf (stderr, "%s: unable to get DPMS state.\n", blurb());
+      return;
+    }
+
+  if (o_enabled != enabled_p)
+    {
+      if (! (enabled_p ? DPMSEnable (dpy) : DPMSDisable (dpy)))
+        {
+          if (verbose_p)
+            fprintf (stderr, "%s: unable to set DPMS state.\n", blurb());
+          return;
+        }
+      else if (verbose_p)
+        fprintf (stderr, "%s: turned DPMS %s.\n", blurb(),
+                 enabled_p ? "on" : "off");
+    }
+
+  if (bogus_p)
+    {
+      if (verbose_p)
+        fprintf (stderr, "%s: not setting bogus DPMS timeouts: %d %d %d.\n",
+                 blurb(), standby_secs, suspend_secs, off_secs);
+      return;
+    }
+
+  if (!DPMSGetTimeouts (dpy, &o_standby, &o_suspend, &o_off))
+    {
+      if (verbose_p)
+        fprintf (stderr, "%s: unable to get DPMS timeouts.\n", blurb());
+      return;
+    }
+
+  if (o_standby != standby_secs ||
+      o_suspend != suspend_secs ||
+      o_off != off_secs)
+    {
+      if (!DPMSSetTimeouts (dpy, standby_secs, suspend_secs, off_secs))
+        {
+          if (verbose_p)
+            fprintf (stderr, "%s: unable to set DPMS timeouts.\n", blurb());
+          return;
+        }
+      else if (verbose_p)
+        fprintf (stderr, "%s: set DPMS timeouts: %d %d %d.\n", blurb(),
+                 standby_secs, suspend_secs, off_secs);
+    }
+
+# else  /* !HAVE_DPMS_EXTENSION */
+
+  if (verbose_p)
+    fprintf (stderr, "%s: DPMS support not compiled in.\n", blurb());
+
+# endif /* HAVE_DPMS_EXTENSION */
+}