p13.7.c

来自「linux程序设计例程」· C语言 代码 · 共 52 行

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

#define UNIX_DOMAIN "unix.domain"

int main(void)
{
	int com_fd;
	int ret;
	char snd_buf[1024];
	int i;

	static struct sockaddr_un srv_addr;
	static struct sockaddr_un clt_addr;
	char clt_file[]="xxxx";

	srv_addr.sun_family=AF_UNIX;
	strcpy(srv_addr.sun_path,UNIX_DOMAIN);
	
	com_fd=socket(PF_UNIX,SOCK_DGRAM,0);
	if(com_fd<0){
		perror("cannot create communication socket");
		return 1;
	}	
	
	mkstemp(clt_file);	
	clt_addr.sun_family=AF_UNIX;
	strcpy(clt_addr.sun_path,clt_file);
	unlink(clt_file);
	
	ret=bind(com_fd,(struct sockaddr*)&clt_addr,sizeof(clt_addr.sun_family)+strlen(clt_addr.sun_path));
        if(ret==-1){
                perror("cannot bind server socket");
                return 1;
        }

	memset(snd_buf,0,1024);
	sprintf(snd_buf,"%ld : message from client",(long)getpid());

	for(i=0;i<4;i++){
		sleep(1);
		int num=sendto(com_fd,snd_buf,sizeof(snd_buf),0,(struct sockaddr*)&srv_addr,sizeof(struct sockaddr));
		printf("send %d characters\n",num);	
	}

	close(com_fd);
	unlink(clt_file);
	return 0;
}