1 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
3 * unistd function definitions for NOLIBC
4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
7 #ifndef _NOLIBC_UNISTD_H
8 #define _NOLIBC_UNISTD_H
16 static __attribute__((unused))
17 int msleep(unsigned int msecs)
19 struct timeval my_timeval = { msecs / 1000, (msecs % 1000) * 1000 };
21 if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
22 return (my_timeval.tv_sec * 1000) +
23 (my_timeval.tv_usec / 1000) +
24 !!(my_timeval.tv_usec % 1000);
29 static __attribute__((unused))
30 unsigned int sleep(unsigned int seconds)
32 struct timeval my_timeval = { seconds, 0 };
34 if (sys_select(0, 0, 0, 0, &my_timeval) < 0)
35 return my_timeval.tv_sec + !!my_timeval.tv_usec;
40 static __attribute__((unused))
41 int usleep(unsigned int usecs)
43 struct timeval my_timeval = { usecs / 1000000, usecs % 1000000 };
45 return sys_select(0, 0, 0, 0, &my_timeval);
48 static __attribute__((unused))
49 int tcsetpgrp(int fd, pid_t pid)
51 return ioctl(fd, TIOCSPGRP, &pid);
54 /* make sure to include all global symbols */
57 #endif /* _NOLIBC_UNISTD_H */