tinc/src/logger.c

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/*
logger.c -- logging code
Copyright (C) 2003 Guus Sliepen <guus@sliepen.eu.org>
2003 Ivo Timmermans <ivo@o2w.nl>
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.
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: logger.c,v 1.1.2.9 2003/08/02 20:50:38 guus Exp $
*/
#include "system.h"
#include "conf.h"
#include "logger.h"
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debug_t debug_level = DEBUG_NOTHING;
static logmode_t logmode = LOGMODE_STDERR;
static pid_t logpid;
extern char *logfilename;
static FILE *logfile = NULL;
static const char *logident = NULL;
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void openlogger(const char *ident, logmode_t mode) {
logident = ident;
logmode = mode;
switch(mode) {
case LOGMODE_STDERR:
logpid = getpid();
break;
case LOGMODE_FILE:
logpid = getpid();
logfile = fopen(logfilename, "a");
if(!logfile)
logmode = LOGMODE_NULL;
break;
case LOGMODE_SYSLOG:
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#ifdef HAVE_SYSLOG_H
openlog(logident, LOG_CONS | LOG_PID, LOG_DAEMON);
break;
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#endif
case LOGMODE_NULL:
break;
}
}
void logger(int priority, const char *format, ...) {
va_list ap;
va_start(ap, format);
switch(logmode) {
case LOGMODE_STDERR:
vfprintf(stderr, format, ap);
fprintf(stderr, "\n");
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fflush(stderr);
break;
case LOGMODE_FILE:
fprintf(logfile, "%ld %s[%d]: ", time(NULL), logident, logpid);
vfprintf(logfile, format, ap);
fprintf(logfile, "\n");
fflush(logfile);
break;
case LOGMODE_SYSLOG:
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#ifdef HAVE_SYSLOG_H
#ifdef HAVE_VSYSLOG
vsyslog(priority, format, ap);
#else
{
char message[4096];
vsnprintf(message, sizeof(message), format, ap);
syslog(priority, "%s", message);
}
#endif
break;
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#endif
case LOGMODE_NULL:
break;
}
va_end(ap);
}
void closelogger(void) {
switch(logmode) {
case LOGMODE_FILE:
fclose(logfile);
break;
case LOGMODE_SYSLOG:
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#ifdef HAVE_SYSLOG_H
closelog();
break;
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#endif
case LOGMODE_NULL:
case LOGMODE_STDERR:
break;
break;
}
}