network.c
上传用户:xiaozhuqw
上传日期:2009-11-15
资源大小:1338k
文件大小:2k
- /*
- * Network library.
- * Copyright (C) 1997 Kunihiro Ishiguro
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * GNU Zebra is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #include <zebra.h>
- /* Read nbytes from fd and store into ptr. */
- int
- readn (int fd, char *ptr, int nbytes)
- {
- int nleft;
- int nread;
- nleft = nbytes;
- while (nleft > 0)
- {
- nread = read (fd, ptr, nleft);
- if (nread < 0)
- return (nread);
- else
- if (nread == 0)
- break;
- nleft -= nread;
- ptr += nread;
- }
- return nbytes - nleft;
- }
- /* Write nbytes from ptr to fd. */
- int
- writen(int fd, char *ptr, int nbytes)
- {
- int nleft;
- int nwritten;
- nleft = nbytes;
- while (nleft > 0)
- {
- nwritten = write(fd, ptr, nleft);
-
- if (nwritten <= 0)
- return (nwritten);
- nleft -= nwritten;
- ptr += nwritten;
- }
- return nbytes - nleft;
- }