<span style="color: #0000ff">#define MAXLINE 80

<span style="color: #0000ff">char client_path = <span style="color: #800000">"<span style="color: #800000">client.socket<span style="color: #800000">"<span style="color: #000000">;
<span style="color: #0000ff">char server_path = <span style="color: #800000">"<span style="color: #800000">server.socket<span style="color: #800000">"<span style="color: #000000">;

<span style="color: #0000ff">int<span style="color: #000000"> main() {
<span style="color: #0000ff">struct<span style="color: #000000"> sockaddr_un cliun,serun;
<span style="color: #0000ff">int<span style="color: #000000"> len;
<span style="color: #0000ff">char buf[<span style="color: #800080">100<span style="color: #000000">];
<span style="color: #0000ff">int<span style="color: #000000"> sockfd,n;

</span><span style="color: #0000ff"&gt;if</span> ((sockfd = socket(AF_UNIX,<span style="color: #800080"&gt;0</span>)) < <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;){  
    perror(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;client socket error</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    exit(</span><span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);  
}  

</span><span style="color: #008000"&gt;//</span><span style="color: #008000"&gt; 一般显式调用bind函数，以便服务器区分不同客户端  </span>
memset(&amp;cliun,<span style="color: #0000ff"&gt;sizeof</span><span style="color: #000000"&gt;(cliun));  
cliun.sun_family </span>=<span style="color: #000000"&gt; AF_UNIX;  
strcpy(cliun.sun_path,client_path);  
len </span>= offsetof(<span style="color: #0000ff"&gt;struct</span> sockaddr_un,sun_path) +<span style="color: #000000"&gt; strlen(cliun.sun_path);  
unlink(cliun.sun_path);  
</span><span style="color: #0000ff"&gt;if</span> (bind(sockfd,len) < <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;) {  
    perror(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;bind error</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    exit(</span><span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);  
}  

memset(</span>&amp;serun,server_path);  
len </span>= offsetof(<span style="color: #0000ff"&gt;struct</span> sockaddr_un,sun_path) +<span style="color: #000000"&gt; strlen(serun.sun_path);  
</span><span style="color: #0000ff"&gt;if</span> (connect(sockfd,len) < <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;){  
    perror(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;connect error</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);  
    exit(</span><span style="color: #800080"&gt;1</span><span style="color: #000000"&gt;);  
}  

</span><span style="color: #0000ff"&gt;while</span>(fgets(buf,MAXLINE,stdin) !=<span style="color: #000000"&gt; NULL) {    
     write(sockfd,strlen(buf));    
     n </span>=<span style="color: #000000"&gt; read(sockfd,MAXLINE);    
     </span><span style="color: #0000ff"&gt;if</span> ( n < <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt; ) {    
        printf(</span><span style="color: #800000"&gt;"</span><span style="color: #800000"&gt;the other side has been closed.n</span><span style="color: #800000"&gt;"</span><span style="color: #000000"&gt;);    
     }</span><span style="color: #0000ff"&gt;else</span><span style="color: #000000"&gt; {    
        write(STDOUT_FILENO,n);    
     }    
}   
close(sockfd);  
</span><span style="color: #0000ff"&gt;return</span> <span style="color: #800080"&gt;0</span><span style="color: #000000"&gt;;  

}

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