Prevent the Read write function of the sticky packet

ssize_t readn (int fd, void * buf, size_t count)
{
size_t nleft = count;
ssize_t nread;
Char *BUFP = (char *) buf;

while (Nleft > 0)
{

if ((nread = Read (FD, BUFP, nleft)) < 0)
{

if (errno = = eintr)
Continue
return-1;
}

else if (nread = 0)//each other closes or has read EOF
return count-nleft;

BUFP + = Nread;
Nleft-= nread;
}

return count;
}

ssize_t writen (int fd, const void * buf, size_t count)
{
size_t nleft = count;
ssize_t Nwritten;
Char *BUFP = (char *) buf;

while (Nleft > 0)
{

if ((Nwritten = Write (fd, BUFP, nleft)) < 0)
{

if (errno = = eintr)
Continue
return-1;
}

else if (Nwritten = 0)
Continue

BUFP + = Nwritten;
Nleft-= Nwritten;
}

return count;

}