net_read.c revision 178825
155682Smarkm/* 255682Smarkm * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska H�gskolan 355682Smarkm * (Royal Institute of Technology, Stockholm, Sweden). 455682Smarkm * All rights reserved. 555682Smarkm * 655682Smarkm * Redistribution and use in source and binary forms, with or without 755682Smarkm * modification, are permitted provided that the following conditions 855682Smarkm * are met: 955682Smarkm * 1055682Smarkm * 1. Redistributions of source code must retain the above copyright 1155682Smarkm * notice, this list of conditions and the following disclaimer. 1255682Smarkm * 1355682Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1455682Smarkm * notice, this list of conditions and the following disclaimer in the 1555682Smarkm * documentation and/or other materials provided with the distribution. 1655682Smarkm * 1755682Smarkm * 3. Neither the name of the Institute nor the names of its contributors 1855682Smarkm * may be used to endorse or promote products derived from this software 1955682Smarkm * without specific prior written permission. 2055682Smarkm * 2155682Smarkm * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 2255682Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2355682Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2455682Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 2555682Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2655682Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2755682Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2855682Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2955682Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3055682Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3155682Smarkm * SUCH DAMAGE. 3255682Smarkm */ 3355682Smarkm 3455682Smarkm#ifdef HAVE_CONFIG_H 3555682Smarkm#include <config.h> 36178825SdfrRCSID("$Id: net_read.c 21005 2007-06-08 01:54:35Z lha $"); 3755682Smarkm#endif 3855682Smarkm 3955682Smarkm#include <sys/types.h> 4055682Smarkm#include <unistd.h> 4155682Smarkm#include <errno.h> 4255682Smarkm 43178825Sdfr#include "roken.h" 4455682Smarkm 4555682Smarkm/* 4655682Smarkm * Like read but never return partial data. 4755682Smarkm */ 4855682Smarkm 49178825Sdfrssize_t ROKEN_LIB_FUNCTION 5055682Smarkmnet_read (int fd, void *buf, size_t nbytes) 5155682Smarkm{ 5255682Smarkm char *cbuf = (char *)buf; 5355682Smarkm ssize_t count; 5455682Smarkm size_t rem = nbytes; 5555682Smarkm 5655682Smarkm while (rem > 0) { 5755682Smarkm#ifdef WIN32 5855682Smarkm count = recv (fd, cbuf, rem, 0); 5955682Smarkm#else 6055682Smarkm count = read (fd, cbuf, rem); 6155682Smarkm#endif 6255682Smarkm if (count < 0) { 6355682Smarkm if (errno == EINTR) 6455682Smarkm continue; 6555682Smarkm else 6655682Smarkm return count; 6755682Smarkm } else if (count == 0) { 6855682Smarkm return count; 6955682Smarkm } 7055682Smarkm cbuf += count; 7155682Smarkm rem -= count; 7255682Smarkm } 7355682Smarkm return nbytes; 7455682Smarkm} 75