nscd/dbg_log.c

   1 /* Copyright (c) 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA. */
  19
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include <syslog.h>
  23 #include <unistd.h>
  24 #include "dbg_log.h"
  25 #include "nscd.h"
  26
  27 /* if in debug mode and we have a debug file, we write the messages to it,
  28    if in debug mode and no debug file, we write the messages to stderr,
  29    else to syslog.  */
  30
  31 FILE *dbgout = NULL;
  32 int debug_flag = 0;
  33
  34 int
  35 set_logfile (const char *logfile)
  36 {
  37   dbgout = fopen (logfile, "a");
  38   return dbgout == NULL ? 0 : 1;
  39 }
  40
  41 void
  42 dbg_log (const char *fmt,...)
  43 {
  44   va_list ap;
  45   char msg[512], msg2[512];
  46
  47   va_start (ap, fmt);
  48   vsnprintf (msg2, sizeof (msg), fmt, ap);
  49
  50   if (debug_flag)
  51     {
  52       snprintf (msg, sizeof (msg), "%d: %s\n", getpid (), msg2);
  53       if (dbgout)
  54         {
  55           fputs (msg, dbgout);
  56           fflush (dbgout);
  57         }
  58       else
  59         fputs (msg, stderr);
  60     }
  61   else
  62     {
  63       snprintf (msg, sizeof (msg), "%d: %s", getpid (), msg2);
  64       syslog (LOG_NOTICE, msg);
  65     }
  66   va_end (ap);
  67 }