Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtlogin/bls/debug.c

@@ -0,0 +1,118 @@
+/*
+ * xdm - display manager daemon
+ *
+ * $XConsortium: debug.c /main/3 1995/07/14 13:23:25 drk $
+ *
+ * Copyright 1988 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  M.I.T. makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * Author:  Keith Packard, MIT X Consortium
+ */
+
+ /***************
+    debug.c
+ ****************/
+
+#ifndef NDEBUG
+/* don't compile anything in this file unless this is pre-release code */
+#include <stdio.h> 
+#include <signal.h>
+#include "../vg.h"
+#include "bls.h"
+
+# include <stdarg.h>
+# define Va_start(a,b) va_start(a,b)
+
+char *DisplayName=NULL;
+
+
+/****************************************************************************
+ *
+ *  Debug
+ *
+ *  Write a debug message to stderr
+ *
+ ****************************************************************************/
+
+static int  DoName=TRUE;
+static int  debugLevel=0;
+
+
+int
+BLS_ToggleDebug( int arg)
+{
+	debugLevel = !debugLevel;
+	(void) signal(SIGHUP,BLS_ToggleDebug);
+}
+
+
+
+void 
+Debug( char *fmt, ...)
+{
+	static int sentinel = 0;
+	static char *debugLog;
+
+    va_list  args;
+
+    Va_start(args,fmt);
+
+
+
+    if ( !sentinel ) {
+    /* 
+     * open up an error log for dtgreet
+     */
+	if ((debugLog = getenv("VG_DEBUG")) == 0)
+		debugLog = "/usr/lib/X11/dt/Dtlogin/dtgreet.log";
+
+	if ( !freopen(debugLog,"a",stderr)) {
+		perror("Debug:");
+	}
+	DisplayName=dpyinfo.name;
+	sentinel = 1;
+    }
+
+    if (debugLevel > 0)
+    {
+	if ( strlen(DisplayName) > 0 && DoName)
+	    fprintf(stderr, "(%s) ", DisplayName);
+
+	vfprintf (stderr,fmt, args);
+	fflush (stderr);
+
+	/*
+	 * don't prepend the display name next time if this debug message
+	 * does not contain a "new line" character...
+	 */
+
+	if ( strchr(fmt,'\n') == NULL )
+	    DoName=FALSE;
+	else
+	    DoName=TRUE;
+	    
+    }
+
+    va_end(args);
+}
+
+#else
+
+/*
+ * Debug stub for product purposes
+ */
+
+void 
+Debug( )
+{ }
+
+#endif	/* NDEBUG */