log4c helloworld

最新推荐文章于 2021-07-13 09:13:00 发布

转载最新推荐文章于 2021-07-13 09:13:00 发布 · 72 阅读

本文介绍了一个使用log4c日志记录库的简单示例程序，并展示了如何配置log4c来记录不同级别的日志信息。通过示例代码，读者可以了解log4c的基本初始化、日志记录及清理过程。

log4c.c

#include <stdio.h>
#include "log4c.h"

int main(int argc, char** argv){
int rc = 0;
char *test = "test strings";
    log4c_category_t* mycat = NULL;

if (log4c_init()){
        printf("log4c_init() failed");
        rc = 1; 
    }else{
        mycat = log4c_category_get("log4c.examples.helloworld");
        log4c_category_log(mycat, LOG4C_PRIORITY_ERROR, "hellworld");
        log4c_category_log(mycat, LOG4C_PRIORITY_ERROR, "%d", rc);
        log4c_category_log(mycat, LOG4C_PRIORITY_ERROR, "%s", test);
/* Explicitly call the log4c cleanup routine */ 
if ( log4c_fini()){ 
            printf("log4c_fini() failed");
        }
    }
return 0;
}

建立配置文件：log4crc

<? xml version = " 1.0 " encoding = " ISO-8859-1 " ?>
<! DOCTYPE log4c SYSTEM "" >
< log4c version = " 1.2.1 " >

< config >
< bufsize > 0 </ bufsize >
< debug level = " 2 " />
< nocleanup > 0 </ nocleanup >
< reread > 1 </ reread >
</ config >

< category name = " root " priority = " notice " />

< appender name = " stdout " type = " stream " layout = " basic " />

< layout name = " basic " type = " basic " />

< category name = " log4c.examples.helloworld " priority = " debug " appender = " stdout " />

</ log4c >

appender 为指定输出位置

例如：appender="./log4c.c"

编译：

gcc - g - Wall - O0 log4c.c - o log4c - llog4c

指定路径编译：

gcc -g -Wall -O0 log4c.c -o log4c -L/usr/local/log4c/lib/ -I/usr/local/log4c/include /usr/local/log4c/lib/liblog4c.so

如果用--prefix=/usr/local/log4c 指定了路径则需要在.profile中添加

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/log4c/lib

export LD_LIBRARY_PATH　

输出：

[stdout] ERROR log4c.examples.helloworld - hellworld
[stdout] ERROR log4c.examples.helloworld - 0
[stdout] ERROR log4c.examples.helloworld - test strings

原文地址：http://hi.baidu.com/lin_yingx/blog/item/8c4af2f96a1939999f514651.html

log4c下载地址：http://log4c.sourceforge.net/

下载地址：http://prdownloads.sourceforge.net/log4c/log4c-1.2.1.tar.gz

完