starterlog.c

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/* FreeS/WAN IPsec starter (starter.c)
 * Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * RCSID $Id: starterlog.c,v 1.3 2004/04/18 03:09:27 mcr Exp $
 */

#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <syslog.h>

#include "openswan.h"
#include "constants.h"

#include "starterlog.h"

#define BUFF_SIZE  16384

/**
 * TODO:
 * o use syslog option in config file
 */

static int _debug = 0;
static int _console = 0;
static int _syslog = 0;

static void do_print_info (int level, const char *buff)
{
	if ((!_debug) && (level == LOG_LEVEL_DEBUG)) return;
	if (_console) {
		if (level == LOG_LEVEL_ERR)
			fprintf(stderr, "%s\n", buff);
		else
			fprintf(stdout, "%s\n", buff);
	}
	if (_syslog) {
		if (level == LOG_LEVEL_ERR)
			syslog(LOG_ERR, "%s\n", buff);
		else
			syslog(LOG_INFO, "%s\n", buff);
	}
}

static void log_info_multiline (int level, const char *buff)
{
	char *copy, *b, *ptr, *end;
	if (!buff) return;
	if ((!_debug) && (level == LOG_LEVEL_DEBUG)) return;
	copy = strdup(buff);
	if (!copy) return;
	end = copy + strlen(copy);
	for (ptr=copy,b=copy;ptr<=end;ptr++) {
		if (*ptr == '\n') *ptr='\0';
		if (*ptr == '\0') {
			if (b!=end) do_print_info(level, b);
			b = ptr+1;
		}
	}
	free(copy);
}

void starter_log (int level, const char *fmt, ...)
{
	va_list args;
	static char buff[BUFF_SIZE];
	if ((!_debug) && (level == LOG_LEVEL_DEBUG)) return;
	va_start (args, fmt);
	vsnprintf(buff, BUFF_SIZE-1, fmt, args);
	buff[BUFF_SIZE-1] = '\0';
	log_info_multiline (level, buff);
	va_end(args);
}

void starter_use_log (int debug, int console, int syslog)
{
	_debug = debug;
	_console = console;
	if (syslog != _syslog) {
		if (syslog) {
			openlog("ipsec_starter", LOG_PID, LOG_USER);
		}
		else {
			closelog();
		}
		_syslog = syslog;
	}
}

void
passert_fail(const char *pred_str, const char *file_str, unsigned long line_no)
{
  static int dying_breath = FALSE;

    /* we will get a possibly unplanned prefix.  Hope it works */
    starter_log(LOG_LEVEL_INFO, "ASSERTION FAILED at %s:%lu: %s", file_str, line_no, pred_str);
    if (!dying_breath)
    {
	dying_breath = TRUE;
    }
    abort();	/* exiting correctly doesn't always work */
}