hlswmaster/logging.c

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/***************************************************************************
* Copyright (C) 03/2005 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. *
***************************************************************************/
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include "configfile.h"
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static FILE *log_fd = NULL;
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/**
* log_print()
* schreibt eine Zeile ins Logfile oder auf stderr
* wenn errno gesetzt ist, wird der error-string mit ausgegeben
*
* @param fmt variable argumentenliste (syntax wie bei printf)
*
* @todo code vereinfachen?
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*/
void log_print(const char *fmt, ...)
{
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va_list az;
char *buffer = malloc(8192);
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va_start(az, fmt);
vsprintf(buffer, fmt, az);
va_end(az);
/* ins logfile loggen */
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if (log_fd) {
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time_t tzgr;
char tbuf[64];
time(&tzgr);
strftime(tbuf, 64, "%b %d %H:%M:%S :", localtime(&tzgr));
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if (errno) {
fprintf(log_fd, "%s %s: %s\n", tbuf, buffer, strerror(errno));
} else {
fprintf(log_fd, "%s %s\n", tbuf, buffer);
}
fflush(log_fd);
/* nach stderr loggen */
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} else {
if (errno) {
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fprintf(stderr, "%s: %s\n", buffer, strerror(errno));
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} else {
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fprintf(stderr, "%s\n", buffer);
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}
}
errno = 0;
free(buffer);
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}
/**
* log_close()
* schliesst das logfile
*/
static void log_close()
{
fclose(log_fd);
}
/**
* log_init()
* initialisiert das logging
*
* @param logfile filename des logfiles
* @return false bei fehler
*/
int log_init(char *logfile)
{
if ((log_fd = fopen(logfile, "a" )) == NULL) {
log_print("log_open('%s'): %s", logfile);
return 0;
}
/* beim beenden log schliessen */
if (atexit(log_close) != 0) {
log_print("log_open(): atexit()");
return 0;
}
log_print("==========================");
return 1;
}