1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2021 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <fcntl.h>
39 #include <unistd.h>
40 #include <string.h>
41 #include <errno.h>
42
43 ssize_t
read(int fd,void * buf,size_t count)44 read(int fd, void *buf, size_t count)
45 {
46 (void) fd;
47 (void) buf;
48 (void) count;
49 return 0;
50 }
51
52 ssize_t
write(int fd,const void * buf,size_t count)53 write(int fd, const void *buf, size_t count)
54 {
55 const uint8_t *b = buf;
56 size_t c = count;
57
58 (void) fd;
59 while (c--) {
60 __asm__("out %%al, $0xe9" : : "a" ((int) *b++));
61 }
62 return count;
63 }
64
65 int
open(const char * pathname,int flags,...)66 open(const char *pathname, int flags, ...)
67 {
68 (void) pathname;
69 (void) flags;
70 return -1;
71 }
72
73 int
close(int fd)74 close(int fd)
75 {
76 (void) fd;
77 return 0;
78 }
79
lseek(int fd,off_t offset,int whence)80 off_t lseek(int fd, off_t offset, int whence)
81 {
82 (void) fd;
83 (void) offset;
84 (void) whence;
85 return (off_t) -1;
86 }
87
lseek64(int fd,_off64_t offset,int whence)88 _off64_t lseek64(int fd, _off64_t offset, int whence)
89 {
90 return (_off64_t) lseek(fd, (off_t) offset, whence);
91 }
92
93 int
unlink(const char * pathname)94 unlink(const char *pathname)
95 {
96 (void) pathname;
97 return 0;
98 }
99
100 int
fstat(int fd,struct stat * sbuf)101 fstat (int fd, struct stat *sbuf)
102 {
103 (void) fd;
104 (void) sbuf;
105 return -1;
106 }
107
108 int
isatty(int fd)109 isatty (int fd)
110 {
111 (void) fd;
112 return 1;
113 }
114
