log4c demo

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>

#include "log4c.h"

int main(int argc, char** argv){
    int rc = 0;
    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, "Hello World!");

        /* Explicitly call the log4c cleanup routine */
        if ( log4c_fini()){
            printf("log4c_fini() failed");
        }
    }
    return rc;
}

　　log4crc

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

<log4c version="1.2.4">

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

        <category name="root" priority="notice"/>
        <category name="six13log.log" priority="error" appender="stdout" />

        <rollingpolicy name="myrollingpolicy" type="sizewin" maxsize="1024" maxnum="10" />

        <appender name="myrollingfileappender" type="rollingfile" logdir="." prefix="myprefix" layout="dated" rollingpolicy="myrollingpolicy" />

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

        <appender name="s13file" type="s13_file" layout="basic"/>
        <appender name="plain_stderr" type="s13_stderr" layout="none"/>
        <appender name="cat_stderr" type="s13_stderr" layout="catlayout"/>
        <appender name="xml_stderr" type="s13_stderr" layout="xmllayout"/>
        <appender name="user_stderr" type="s13_stderr" layout="userlayout"/>

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

        <layout name="catlayout" type="s13_cat"/>
        <layout name="xmllayout" type="s13_xml"/>
        <layout name="none" type="s13_none"/>
        <layout name="userlayout" type="s13_userloc"/>

        <category name="six13log.log.app.application2" priority="debug" appender="cat_stderr" />
        <category name="six13log.log.app.application3" priority="debug" appender="user_stderr" />
        <category name="six13log.log.app" priority="debug" appender="myrollingfileappender" />
        <category name="log4c.examples.helloworld" priority="debug" appender="aaa"/>
</log4c>

　　编译命令

gcc log4c.c -o log4c -llog4c