pledge for xclock. okan@ got to the same patch. I added autoconf goo

to make it possible to send it upstreams. ok deraadt@

app/xclock/configure.ac

@@ -39,7 +39,7 @@ AC_CONFIG_HEADERS([config.h])
 
 
 
-AC_CHECK_FUNCS([strlcpy getpid])
+AC_CHECK_FUNCS([strlcpy getpid pledge])
 
 AM_ICONV
 

app/xclock/xclock.c

@@ -37,6 +37,9 @@ in this Software without prior written authorization from The Open Group.
 # include "config.h"
 #endif
 
+#ifdef HAVE_PLEDGE
+# include <err.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <X11/Xatom.h>
@@ -224,6 +227,11 @@ main(int argc, char *argv[])
     }
 #endif
 
+#ifdef HAVE_PLEDGE
+    if (pledge("stdio", NULL) == -1)
+	    err(1, "pledge");
+#endif
+
     XtAppMainLoop (app_con);
     exit(0);
 }