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#include <stdio.h>
#include <sys/types.h>
#include <sys/un.h>
#include <sys/socket.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
 
#define UNIX_PATH_MAX    128
 
int 
UClient(const char *sockname)
{
	int    sockfd;
	struct sockaddr_un addr;
	int    rc;
 
	if (sockname == NULL || 
		strlen(sockname) > UNIX_PATH_MAX) {
		printf("Invalid sockname\n");
		return (-1);
	}
 
	sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
	if (sockfd < 0) {
	   printf("socket error: %s\n", strerror(errno));
	   return (-1);
	}
 
	memset(&addr, 0, sizeof(addr));
	addr.sun_family = AF_UNIX;
	memcpy(addr.sun_path, sockname, strlen(sockname));
 
	if (connect(sockfd, (struct sockaddr*) &addr, sizeof(addr)) < 0) {
	   printf("connect error: %s\n", strerror(errno));
	   close(sockfd);
	   return (-1);
	}
 
	return (sockfd);
}
 
int 
UServer(const char *sockname)
{
	int    sockfd;
	struct sockaddr_un addr;
 
	if (sockname == NULL || 
		strlen(sockname) > UNIX_PATH_MAX) {
		printf("Invalid sockname\n");
		return (-1);
	}
	unlink(sockname);
 
	sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
	if (sockfd < 0) {
		printf("socket error: %s\n", strerror(errno));
		return (-1);
	}
 
	memset(&addr, 0, sizeof(addr));
	addr.sun_family = AF_UNIX;
	memcpy(addr.sun_path, sockname, strlen(sockname));
 
	if (bind(sockfd, (struct sockaddr *) &addr, sizeof(addr)) == 0) {
		if (listen(sockfd, 5) == 0)
			return (sockfd);
	}
 
	close(sockfd);
	printf("connect error: %s\n", strerror(errno));
 
	return (-1);
}
/* end of file */