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