1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2015 Nahanni Systems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34#include <sys/types.h>
35#include <unistd.h>
36
37#include <errno.h>
38
39#include "sockstream.h"
40
41ssize_t
42stream_read(int fd, void *buf, ssize_t nbytes)
43{
44	uint8_t *p;
45	ssize_t len = 0;
46	ssize_t n;
47
48	p = buf;
49
50	while (len < nbytes) {
51		n = read(fd, p + len, nbytes - len);
52		if (n == 0)
53			break;
54
55		if (n < 0) {
56			if (errno == EINTR || errno == EAGAIN)
57				continue;
58			return (n);
59		}
60		len += n;
61	}
62	return (len);
63}
64
65ssize_t
66stream_write(int fd, const void *buf, ssize_t nbytes)
67{
68	const uint8_t *p;
69	ssize_t len = 0;
70	ssize_t n;
71
72	p = buf;
73
74	while (len < nbytes) {
75		n = write(fd, p + len, nbytes - len);
76		if (n == 0)
77			break;
78		if (n < 0) {
79			if (errno == EINTR || errno == EAGAIN)
80				continue;
81			return (n);
82		}
83		len += n;
84	}
85	return (len);
86}
87