nscd/dbg_log.c

   1 /* Copyright (c) 1998, 2000, 2004, 2005 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    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License version 2 as
   7    published by the Free Software Foundation.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #include <stdarg.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21 #include <syslog.h>
  22 #include <unistd.h>
  23 #include "dbg_log.h"
  24 #include "nscd.h"
  25
  26 /* if in debug mode and we have a debug file, we write the messages to it,
  27    if in debug mode and no debug file, we write the messages to stderr,
  28    else to syslog.  */
  29
  30 static char *logfilename;
  31 FILE *dbgout;
  32 int debug_level;
  33
  34 void
  35 set_logfile (const char *logfile)
  36 {
  37   logfilename = strdup (logfile);
  38 }
  39
  40 int
  41 init_logfile (void)
  42 {
  43   if (logfilename)
  44     {
  45       dbgout = fopen64 (logfilename, "a");
  46       return dbgout == NULL ? 0 : 1;
  47     }
  48   return 1;
  49 }
  50
  51 void
  52 dbg_log (const char *fmt,...)
  53 {
  54   va_list ap;
  55   char msg[512], msg2[512];
  56
  57   va_start (ap, fmt);
  58   vsnprintf (msg2, sizeof (msg), fmt, ap);
  59
  60   if (debug_level > 0)
  61     {
  62       snprintf (msg, sizeof (msg), "%d: %s%s", getpid (), msg2,
  63                 msg2[strlen (msg2) - 1] == '\n' ? "" : "\n");
  64       if (dbgout)
  65         {
  66           fputs (msg, dbgout);
  67           fflush (dbgout);
  68         }
  69       else
  70         fputs (msg, stderr);
  71     }
  72   else
  73     syslog (LOG_NOTICE, "%d %s", getpid (), msg2);
  74
  75   va_end (ap);
  76 }