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/*
$Header: /cvs/src/chrony/logging.c,v 1.15 2003/09/22 21:22:30 richard Exp $
=======================================================================
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Richard P. Curnow 1997-2003
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
**********************************************************************
=======================================================================
Module to handle logging of diagnostic information
*/
#include "sysincl.h"
#include "main.h"
#include "logging.h"
#include "version.h"
/* ================================================== */
/* Flag indicating we have initialised */
static int initialised = 0;
static int is_detached = 0;
static time_t last_limited = 0;
#ifdef WINNT
static FILE *logfile;
#endif
/* ================================================== */
/* Init function */
void
LOG_Initialise(void)
{
initialised = 1;
#ifdef WINNT
logfile = fopen("./chronyd.err", "a");
#endif
return;
}
/* ================================================== */
/* Fini function */
void
LOG_Finalise(void)
{
#ifdef WINNT
if (logfile) {
fclose(logfile);
}
#else
if (is_detached) {
closelog();
}
#endif
initialised = 0;
return;
}
/* ================================================== */
void
LOG_Line_Function(LOG_Severity severity, LOG_Facility facility, const char *format, ...)
{
char buf[2048];
va_list other_args;
va_start(other_args, format);
vsnprintf(buf, sizeof(buf), format, other_args);
va_end(other_args);
#ifdef WINNT
if (logfile) {
fprintf(logfile, "%s\n", buf);
}
#else
if (is_detached) {
switch (severity) {
case LOGS_INFO:
syslog(LOG_INFO, "%s", buf);
break;
case LOGS_WARN:
syslog(LOG_WARNING, "%s", buf);
break;
case LOGS_ERR:
default:
syslog(LOG_ERR, "%s", buf);
break;
}
} else {
fprintf(stderr, "%s\n", buf);
}
#endif
return;
}
/* ================================================== */
volatile void
LOG_Fatal_Function(LOG_Facility facility, const char *format, ...)
{
char buf[2048];
va_list other_args;
va_start(other_args, format);
vsnprintf(buf, sizeof(buf), format, other_args);
va_end(other_args);
#ifdef WINNT
if (logfile) {
fprintf(logfile, "Fatal error : %s\n", buf);
}
#else
if (is_detached) {
syslog(LOG_CRIT, "Fatal error : %s", buf);
} else {
fprintf(stderr, "Fatal error : %s\n", buf);
}
#endif
MAI_CleanupAndExit();
return;
}
/* ================================================== */
void
LOG_Position(const char *filename, int line_number, const char *function_name)
{
#ifdef WINNT
#else
time_t t;
struct tm stm;
char buf[64];
if (!is_detached) {
/* Don't clutter up syslog with internal debugging info */
time(&t);
stm = *gmtime(&t);
strftime(buf, sizeof(buf), "%d-%H:%M:%S", &stm);
fprintf(stderr, "%s:%d:(%s)[%s] ", filename, line_number, function_name, buf);
}
#endif
return;
}
/* ================================================== */
void
LOG_GoDaemon(void)
{
#ifdef WINNT
#else
int pid, fd;
/* Does this preserve existing signal handlers? */
pid = fork();
if (pid < 0) {
LOG(LOGS_ERR, LOGF_Logging, "Could not detach, fork failed : %s", strerror(errno));
} else if (pid > 0) {
exit(0); /* In the 'grandparent' */
} else {
setsid();
/* Do 2nd fork, as-per recommended practice for launching daemons. */
pid = fork();
if (pid < 0) {
LOG(LOGS_ERR, LOGF_Logging, "Could not detach, fork failed : %s", strerror(errno));
} else if (pid > 0) {
exit(0); /* In the 'parent' */
} else {
/* In the child we want to leave running as the daemon */
/* Don't keep stdin/out/err from before. */
for (fd=0; fd<1024; fd++) {
close(fd);
}
is_detached = 1;
openlog("chronyd", LOG_PID, LOG_DAEMON);
LOG(LOGS_INFO, LOGF_Logging, "chronyd version %s starting", PROGRAM_VERSION_STRING);
}
}
#endif
}
/* ================================================== */
int
LOG_RateLimited(void)
{
time_t now;
now = time(NULL);
if (last_limited + 10 > now && last_limited <= now)
return 1;
last_limited = now;
return 0;
}
/* ================================================== */
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