echo server main routine: int main$($int argc, char $**$argv$)\{$

int listenfd, connfd, port, clientlen;

struct sockaddr$\_$in clientaddr;

struct hostent $*$hp;

char $*$haddrp;

port $=$ atoi$($argv$[1])$; $/*$ the server listens on a port passed

on the command line $*/$

listenfd $=$ open$\_$listenfd$($port$)$;

while $(1)\{$

clientlen $=$ sizeof$($clientaddr$)$;

connfd $=$ Accept$($listenfd$,($SA $*)$&clientaddr, &clientlen$)$;

hp $=$ Gethostbyaddr$(($const char $*)$&clientaddr.sin$\_$addr.s$\_$addr,

sizeof$($clientaddr$.$sin$\_$addr.s$\_$addr$),$ AF$\_$INET$)$;

addrp $=$ inet$\_$ntoa$($clientaddr$.$sin$\_$addr$)$;

printf$("$server connected to $\%$s $(\%$s$)$

$",$ hp$->$h$\_$name, haddrp$)$;

echo$($connfd$)$;

Close$($connfd$)$;

$\}$

$\}$ trace each line, does this server accepts multiple clients? and how do we fork so the server accepts multiple clients and creates socket file descriptor for each?