nscd/dbg_log.c

   1 /* Copyright (c) 1998, 2000, 2004, 2005, 2009 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 as published
   7    by the Free Software Foundation; version 2 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #include <stdarg.h>
  20 #include <stdio.h>
  21 #include <string.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 static char *logfilename;
  32 FILE *dbgout;
  33 int debug_level;
  34
  35 void
  36 set_logfile (const char *logfile)
  37 {
  38   logfilename = strdup (logfile);
  39 }
  40
  41 int
  42 init_logfile (void)
  43 {
  44   if (logfilename)
  45     {
  46       dbgout = fopen64 (logfilename, "a");
  47       return dbgout == NULL ? 0 : 1;
  48     }
  49   return 1;
  50 }
  51
  52 void
  53 dbg_log (const char *fmt,...)
  54 {
  55   va_list ap;
  56   char msg2[512];
  57
  58   va_start (ap, fmt);
  59   vsnprintf (msg2, sizeof (msg2), fmt, ap);
  60
  61   if (debug_level > 0)
  62     {
  63       time_t t = time (NULL);
  64
  65       struct tm now;
  66       localtime_r (&t, &now);
  67
  68       char buf[256];
  69       strftime (buf, sizeof (buf), "%c", &now);
  70
  71       char msg[512];
  72       snprintf (msg, sizeof (msg), "%s - %d: %s%s", buf, getpid (), msg2,
  73                 msg2[strlen (msg2) - 1] == '\n' ? "" : "\n");
  74       if (dbgout)
  75         {
  76           fputs (msg, dbgout);
  77           fflush (dbgout);
  78         }
  79       else
  80         fputs (msg, stderr);
  81     }
  82   else
  83     syslog (LOG_NOTICE, "%d %s", getpid (), msg2);
  84
  85   va_end (ap);
  86 }