logging.c

linux下的dvb收看解析软件代码； 带参考程序

/*
Copyright (C) 2006  Adam Charrett
 
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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 
logging.h
 
Logging functions.
 
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <time.h>

#include "main.h"
#include "logging.h"

int verbosity = 0;

/*
 * Print out a log message to stderr depending on verbosity
 */
void printlog(int level, char *format, ...)
{
    if (level <= verbosity)
    {
        va_list valist;
        char *logline;
        va_start(valist, format);
        vasprintf(&logline, format, valist);
        if (DaemonMode)
        {
            char buffer[24]; /* "YYYY-MM-DD HH:MM:SS" */
            time_t curtime;
            struct tm *loctime;
            /* Get the current time. */
            curtime = time (NULL);
            /* Convert it to local time representation. */
            loctime = localtime (&curtime);
            /* Print it out in a nice format. */
            strftime (buffer, sizeof(buffer), "%F %T : ", loctime);
            fputs(buffer, stderr);
        }
        fputs(logline, stderr);
        if (DaemonMode)
        {
            fflush(stderr);
        }
        va_end(valist);
        free(logline);
    }
}