Unbenannt

#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <netdb.h>#include <stdlib.h>#include <stdio.h>#include <arpa/inet.h>#include <unistd.h>#include <string.h>#define PORT 6667#define BUF_SIZE 1024int main( int argc, char* argv[] ) {	int 			sock, run;	char			buf[BUF_SIZE];	struct sockaddr_in	server;	struct hostent 		*hp;	if(argc != 2)	{		fprintf(stderr,"usage: client <hostname>\n");		exit(2);	}	/* create socket */	sock = socket(AF_INET,SOCK_STREAM,0);	if(sock < 0)	{		perror("open stream socket");		exit(1);	}	server.sin_family = AF_INET;	/* get Internet addres of host specified by command line */	hp = gethostbyname(argv[1]);	if(hp == NULL)	{		fprintf(stderr,"%s unknown host.\n",argv[1]);		exit(2);	}	/*copies the internet address to server address */	bcopy(hp->h_addr, &server.sin_addr, hp->h_length);	/* set port */	server.sin_port = PORT;	/* open connection *///	if(connect(sock,&server,sizeof(struct sockaddr_in)) < 0)	if(connect(sock,(const sockaddr*)&server,sizeof(struct sockaddr_in)) < 0)	{		perror("connection stream socket");		exit(1);	}	/* read input from stdin */	while(run=read(0,buf,BUF_SIZE))	{		if(run < 0)		{		perror("error reading from stdin");		exit(1);		}		/* write buffer to stream socket */		if(write(sock,buf,run) < 0)		{			perror("writing on stream socket");			exit(1);		}	}	close(sock);}