46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
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/* gnome-startup.c - Functions for handling one-time startups in sessions.
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Written by Tom Tromey <tromey@cygnus.com>. */
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#include <config.h>
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#include "gnome-startup.h"
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#include <string.h>
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#include <gdk/gdkx.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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gboolean
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gnome_startup_acquire_token (const char *property,
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const char *session_id)
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{
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Atom atom, actual;
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unsigned long nitems, nbytes;
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unsigned char *current;
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int len, format;
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gboolean result;
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atom = XInternAtom (GDK_DISPLAY (), property, False);
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len = strlen (session_id);
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/* Append our session id to the property. We do this to avoid a
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race condition: if two clients run this code, we want to make
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sure that only one client can acquire the lock. */
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XChangeProperty (GDK_DISPLAY (), DefaultRootWindow (GDK_DISPLAY ()), atom,
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XA_STRING, 8, PropModeAppend, session_id, len);
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if (XGetWindowProperty (GDK_DISPLAY (), DefaultRootWindow (GDK_DISPLAY ()),
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atom, 0, len, False, XA_STRING,
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&actual, &format,
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&nitems, &nbytes, ¤t) != Success)
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current = NULL;
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if (! current)
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return 0;
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result = ! strncmp (current, session_id, len);
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XFree (current);
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return result;
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}
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