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/*
* Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "net_read_write.h"
/*
* Like read but never return partial data.
*/
ssize_t
net_read (int fd, void *buf, size_t nbytes)
{
char *cbuf = (char *)buf;
ssize_t count;
size_t rem = nbytes;
while (rem > 0) {
count = read (fd, cbuf, rem);
if (count < 0) {
if (errno == EINTR)
continue;
else
return count;
} else if (count == 0) {
return count;
}
cbuf += (size_t) count;
rem -= (size_t) count;
}
return (ssize_t)nbytes;
}
/*
* Like write but never return partial data.
*/
ssize_t
net_write (int fd, const void *buf, size_t nbytes)
{
const char *cbuf = (const char *)buf;
ssize_t count;
size_t rem = nbytes;
while (rem > 0) {
count = write (fd, cbuf, rem);
if (count < 0) {
if (errno == EINTR)
continue;
else
return count;
}
cbuf += (size_t)count;
rem -= (size_t)count;
}
return (ssize_t)nbytes;
}
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