116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
/***************************************************************************
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* Copyright (C) 07/2007 by Olaf Rempel *
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* razzor@kopf-tisch.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "logging.h"
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#define BUFSIZE 8192
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static FILE *log_file = NULL;
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static int log_prio = LOG_EVERYTIME;
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static char *buffer = NULL;
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int log_print(int prio, const char *fmt, ...)
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{
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va_list az;
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int len = 0, retval;
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if (prio < log_prio)
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return 0;
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if (buffer == NULL) {
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buffer = malloc(BUFSIZE);
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if (buffer == NULL) {
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fprintf(stderr, "%s(): out of memory\n", __FUNCTION__);
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return -1;
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}
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}
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if (log_file != NULL) {
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time_t tzgr;
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time(&tzgr);
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len += strftime(buffer, BUFSIZE, "%b %d %H:%M:%S :", localtime(&tzgr));
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}
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va_start(az, fmt);
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len += vsnprintf(buffer + len, BUFSIZE - len, fmt, az);
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va_end(az);
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if (len < 0 || len >= BUFSIZE) {
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errno = 0;
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return log_print(LOG_ERROR, "%s: arguments too long", __FUNCTION__);
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}
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if (errno) {
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len += snprintf(buffer + len, BUFSIZE - len, ": %s", strerror(errno));
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errno = 0;
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}
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retval = fprintf((log_file ? log_file : stderr), "%s\n", buffer);
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fflush(log_file);
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return retval;
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}
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void log_close(void)
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{
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if (buffer) {
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free(buffer);
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buffer = NULL;
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}
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if (log_file) {
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fclose(log_file);
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log_file = NULL;
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}
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}
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int log_init(const char *logfile)
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{
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if (log_file != NULL)
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log_close();
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log_file = fopen(logfile, "a");
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if (log_file == NULL) {
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fprintf(stderr, "%s(): can not open logfile", __FUNCTION__);
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return -1;
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}
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if (fcntl(fileno(log_file), F_SETFD, FD_CLOEXEC) < 0) {
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fprintf(stderr, "%s(): fcntl(FD_CLOEXEC)", __FUNCTION__);
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fclose(log_file);
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return -1;
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}
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log_prio = LOG_EVERYTIME;
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return 0;
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}
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void log_setprio(int prio)
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{
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log_prio = prio;
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}
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