使用rsyslog编程，产生trace信息，记录到日志中

参考：http://blog.csdn.net/nowayings/article/details/38926501

https://www.cnblogs.com/bonelee/p/6234647.html

打印到日志中：

代码如下

#include<syslog.h>

#include <stdio.h>

int main(){

        FILE*f;

        f = fopen("abc","r");

        if(!f){

                syslog(LOG_ERR|LOG_USER,"test -%m/n");

        }

}

配置如下：添加第2行部分。

ubuntu@ubuntu-vm:~/workspace/log$ vim /etc/rsyslog.d/30-debug.conf

*.debug         /var/log/mydebug.log

user.*          -/var/log/user.log

:msg,contains, "logger" ~

运行代码：

ubuntu@ubuntu-vm:~/workspace/log$ ./a.out

ubuntu@ubuntu-vm:~/workspace/log$ cat  /var/log/user.log

Nov  :: ubuntu-vm a.out: test -No such file or directory/n

Nov  :: ubuntu-vm a.out: test -No such file or directory/n