tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2/*
3 * unistd function definitions for NOLIBC
4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
5 */
6
7#ifndef _NOLIBC_UNISTD_H
8#define _NOLIBC_UNISTD_H
9
10#include "std.h"
11#include "arch.h"
12#include "types.h"
13#include "sys.h"
14
15
16#define STDIN_FILENO 0
17#define STDOUT_FILENO 1
18#define STDERR_FILENO 2
19
20
21static __attribute__((unused))
22int msleep(unsigned int msecs)
23{
24 struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };
25
26 if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
27 return (my_timeval.tv_sec * 1000) +
28 (my_timeval.tv_usec / 1000) +
29 !!(my_timeval.tv_usec % 1000);
30 else
31 return 0;
32}
33
34static __attribute__((unused))
35unsigned int sleep(unsigned int seconds)
36{
37 struct timeval my_timeval = { seconds, 0 };
38
39 if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
40 return my_timeval.tv_sec + !!my_timeval.tv_usec;
41 else
42 return 0;
43}
44
45static __attribute__((unused))
46int usleep(unsigned int usecs)
47{
48 struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 };
49
50 return sys_select(0, 0, 0, 0, &my_timeval);
51}
52
53static __attribute__((unused))
54int tcsetpgrp(int fd, pid_t pid)
55{
56 return ioctl(fd, TIOCSPGRP, &pid);
57}
58
59#define _syscall(N, ...) \
60({ \
61 long _ret = my_syscall##N(__VA_ARGS__); \
62 if (_ret < 0) { \
63 SET_ERRNO(-_ret); \
64 _ret = -1; \
65 } \
66 _ret; \
67})
68
69#define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
70#define __syscall_narg(_0, _1, _2, _3, _4, _5, _6, N, ...) N
71#define _syscall_n(N, ...) _syscall(N, __VA_ARGS__)
72#define syscall(...) _syscall_n(_syscall_narg(__VA_ARGS__), ##__VA_ARGS__)
73
74/* make sure to include all global symbols */
75#include "nolibc.h"
76
77#endif /* _NOLIBC_UNISTD_H */