hlswmaster-ng (now in c++)
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/***************************************************************************
* Copyright (C) 04/2006 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include "logging.h"
LogSystem::LogSystem()
: output(0), priority(0)
{
}
LogSystem::~LogSystem()
{
if (output)
delete output;
}
LogSystem* LogSystem::getInstance()
{
static LogSystem ls;
return &ls;
}
void LogSystem::init(int prio, LogOutput* out)
{
LogSystem* ls = getInstance();
if (out) {
if (ls->output)
delete ls->output;
ls->output = out;
}
ls->priority = prio;
}
void LogSystem::init(const char* prio, LogOutput* out)
{
if (!strcasecmp(prio, "DEBUG"))
init(LOG_DEBUG, out);
else if (!strcasecmp(prio, "INFO"))
init(LOG_INFO, out);
else if (!strcasecmp(prio, "NOTICE"))
init(LOG_NOTICE, out);
else if (!strcasecmp(prio, "WARN"))
init(LOG_WARN, out);
else if (!strcasecmp(prio, "ERROR"))
init(LOG_ERROR, out);
else if (!strcasecmp(prio, "CRIT"))
init(LOG_CRIT, out);
else
log(LOG_CRIT, "invalid logging priority");
}
void LogSystem::log(int prio, const char* fmt, ...)
{
LogSystem* ls = getInstance();
if (prio > ls->priority || !ls->output)
return;
va_list az;
int len;
va_start(az, fmt);
len = vsnprintf(ls->buffer, sizeof(ls->buffer), fmt, az);
va_end(az);
if (errno) {
strncpy(ls->buffer + len, ": ", sizeof(ls->buffer) - len);
len += 2;
strncpy(ls->buffer + len, strerror(errno), sizeof(ls->buffer) - len);
errno = 0;
}
ls->output->write(ls->buffer);
}
/* ------- */
void StdErrLog::write(const char* buf)
{
fprintf(stderr, "%s\n", buf);
}
/* ------- */
FileLog::FileLog(const char* filename)
{
if (!(logfile = fopen(filename, "a" )))
LogSystem::log(LOG_CRIT, "Can not open logfile '%s'", filename);
fprintf(logfile, "-----------------\n");
}
FileLog::~FileLog()
{
fclose(logfile);
}
void FileLog::write(const char* buf)
{
time_t tzgr;
char tbuf[64];
time(&tzgr);
strftime(tbuf, sizeof(tbuf), "%b %d %H:%M:%S :", localtime(&tzgr));
fprintf(logfile, "%s %s\n", tbuf, buf);
fflush(logfile);
}