1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29 #include <sys/types.h>
30 #include <unistd.h>
31
32 #include <errno.h>
33
34 #include "sockstream.h"
35
36 ssize_t
stream_read(int fd,void * buf,ssize_t nbytes)37 stream_read(int fd, void *buf, ssize_t nbytes)
38 {
39 uint8_t *p;
40 ssize_t len = 0;
41 ssize_t n;
42
43 p = buf;
44
45 while (len < nbytes) {
46 n = read(fd, p + len, nbytes - len);
47 if (n == 0)
48 break;
49
50 if (n < 0) {
51 if (errno == EINTR || errno == EAGAIN)
52 continue;
53 return (n);
54 }
55 len += n;
56 }
57 return (len);
58 }
59
60 ssize_t
stream_write(int fd,const void * buf,ssize_t nbytes)61 stream_write(int fd, const void *buf, ssize_t nbytes)
62 {
63 const uint8_t *p;
64 ssize_t len = 0;
65 ssize_t n;
66
67 p = buf;
68
69 while (len < nbytes) {
70 n = write(fd, p + len, nbytes - len);
71 if (n == 0)
72 break;
73 if (n < 0) {
74 if (errno == EINTR || errno == EAGAIN)
75 continue;
76 return (n);
77 }
78 len += n;
79 }
80 return (len);
81 }
82