程式說明：
程式裡包含服務端和客戶端兩個程式，它們之間使用 af_unix 實現本機資料流通訊。使用 af_unix 域實際上是使用本地 socket 檔案來通訊。
伺服器端**：
#include#include
#include
#include
#include
#include
int
main (
intargc
,char
*argv
)printf (
"the server is waiting for client data...
\n ");
for( i=0
,ch_send
='1';
i<
5; i++,
ch_send
++)
printf (
"the character receiver from client is %c
\n "
,ch_recv);
sleep (
1);if
(( bytes
=write (
client_sockfd,&
ch_send
,1))
==-1) }
close (
client_sockfd);
unlink (
"server socket"); }
客戶端**：
#include#include
#include
#include
#include
#include
int
main (
intargc
,char
*argv
)address
.sun_family
=af_unix;
strcpy (
address
.sun_path
,"server_socket");
len=sizeof
( address);
/*向伺服器傳送連線請求*/
result
=connect (
sockfd
, ( struct
sockaddr
*) &
address
,len);
if( result==-
1)
for (
i=0,
ch_send
='a';
i<
5; i++,
ch_send
++)
sleep (
2);
/*休息二秒鐘再發一次*/
if(( bytes
=read (
sockfd,&
ch_recv
,1))
==-1)
printf (
"receive from server data is %c
\n "
,ch_recv); }
close (
sockfd);
return
( 0); }
./sock_local_serverserver is waiting for client connect...
./sock_local_clientensure the server is up
connect: connection refused
提示伺服器沒有準備好，連線被拒絕，從而直接退出程式。
如果伺服器和客戶端依次執行，可以在兩邊看到輸出：
伺服器端：
./sock_local_serverserver is waiting for client connect...
the server is waiting for client data...
the character receiver from client is a
the character receiver from client is b
the character receiver from client is c
the character receiver from client is d
the character receiver from client is e
客戶端：
./sock_local_clientreceive from server data is 1
receive from server data is 2
receive from server data is 3
receive from server data is 4
receive from server data is 5
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