logging.c

   1 /*
   2  * logging.c
   3  *
   4  * Simple logging functions that can be compiled away into nothing.
   5  *
   6  * Copyright (C) 2001-2003 Greg Kroah-Hartman <greg@kroah.com>
   7  *
   8  *      This program is free software; you can redistribute it and/or modify it
   9  *      under the terms of the GNU General Public License as published by the
  10  *      Free Software Foundation, version 2 of the License.
  11  *
  12  *      This program is distributed in the hope that it will be useful, but
  13  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *      General Public License for more details.
  16  *
  17  *      You should have received a copy of the GNU General Public License along
  18  *      with this program; if not, write to the Free Software Foundation, Inc.,
  19  *      675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  */
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <sys/types.h>
  26 #include <unistd.h>
  27 #include <syslog.h>
  28 #include "udev.h"
  29
  30 #ifdef DEBUG
  31
  32 static int logging_init = 0;
  33 static unsigned char udev_logname[42];
  34
  35 static void init_logging(void)
  36 {
  37         snprintf(udev_logname, 42,"udev[%d]", getpid());
  38
  39         openlog(udev_logname, 0, LOG_DAEMON);
  40         logging_init = 1;
  41 }
  42
  43 /**
  44  * log_message - sends a message to the logging facility
  45  */
  46 int log_message(int level, const char *format, ...)
  47 {
  48         va_list args;
  49
  50         if (!logging_init)
  51                 init_logging();
  52         va_start(args, format);
  53         vsyslog(level, format, args);
  54         va_end(args);
  55         return 1;
  56 }
  57
  58 #endif