static ssize_t socket_read(int sockfd, void *buff, size_t size) { ssize_t retval, total = 0; while (size) { retval = read(sockfd, buff, size); if (retval == 0) { return -EIO; } if (retval < 0) { if (errno == EINTR) { continue; } return -errno; } size -= retval; buff += retval; total += retval; } return total; }