syslog()用法

#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <fcntl.h>

int main(void)
{
    int fd;
    char filename[] = "/root/wenhao";      /* file is not exist */

    if ((fd = open(filename, O_RDONLY)) == -1) 
    {
        syslog(LOG_ERR | LOG_LOCAL0, "open %s: %m\n", filename);
        exit(1);
    }

    return 0;
}

[root@localhost ex15_syslog]# tail -n 1 /var/log/messages

Sep  6 14:17:46 localhost syslog: open /root/wenhao: No such file or directory 

转自:http://blog.chinaunix.net/space.php?uid=20566573&do=blog&cuid=343486