socket unix

unix本地的socket，会产生sock文件

root@ubuntu:~/test# cat testserver.c 
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/un.h>
int main(){
        int server_sockfd,client_sockfd;
        int server_len,client_len;
        struct sockaddr_un server_address;
        struct sockaddr_un client_address;
        unlink("server_socket");
        server_sockfd=socket(AF_UNIX,SOCK_STREAM,0);
        server_address.sun_family=AF_UNIX;
        strcpy(server_address.sun_path,"server_socket");
        server_len=sizeof(server_address);
        bind(server_sockfd,(struct sockaddr *)&server_address,server_len);
        listen(server_sockfd,5);
        while(1){
                char ch;
                printf("server waiting\n");
                client_len=sizeof(client_address);
                client_sockfd=accept(server_sockfd,(struct sockaddr *)&server_address,server_len);
                read(client_sockfd,&ch,1);
                ch++;
                write(client_sockfd,&ch,1);
                close(client_sockfd);

        }

}
root@ubuntu:~/test# 

ls -lF server_socket

root@ubuntu:~/test# cat testclient.c 
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/un.h>
int main(){
        int sockfd;
        struct sockaddr_un address;
        int len;
        int result;
        char ch='A';
        sockfd=socket(AF_UNIX,SOCK_STREAM,0);
        address.sun_family=AF_UNIX;
        strcpy(address.sun_path,"server_socket");
        len=sizeof(address);
        result=connect(sockfd,(struct sockaddr *) &address,len);
        if(result==-1){
                perror("oops:client1");
                exit(1);
        }
        write(sockfd,&ch,1);
        read(sockfd,&ch,1);
        printf("char from sever=%c\n",ch);
        close(sockfd);
        exit(0);

}
root@ubuntu:~/test#