netread - receive a message from a socket
int netread (int s, char *buf, int nbytes);
ssize_t netread_timeout (int s, void *buf, size_t nbytes, int timeout);
netread receives a message from a socket. It overcomes the message
fragmentation problem and always waits for all requested bytes to
arrive or a timeout/error occurs.
This routine returns the number of bytes if the operation was
successful, 0 if the connection was closed by the remote end or -1 if
the operation failed. In the latter case, serrno is set appropriately.
EINTR The function was interrupted by a signal.
EBADF s is not a valid descriptor.
EAGAIN The socket is non-blocking and there is no message
EFAULT buf is not a valid pointer.
EINVAL nbytes is negative or zero.
ENOTSOCK s is not a socket.
SECONNDROP Connection closed by remote end.
SETIMEDOUT Timed out.
LCG Grid Deployment Team