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_narg(_0, _1, _2, _3, _4, _5, _6, N, ...) N
60#define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
61#define _syscall(N, ...) __sysret(my_syscall##N(__VA_ARGS__))
62#define _syscall_n(N, ...) _syscall(N, __VA_ARGS__)
63#define syscall(...) _syscall_n(_syscall_narg(__VA_ARGS__), ##__VA_ARGS__)
64
65/* make sure to include all global symbols */
66#include "nolibc.h"
67
68#endif /* _NOLIBC_UNISTD_H */
69