tools/include/nolibc/unistd.h

   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
  21 static __attribute__((unused))
  22 int 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
  34 static __attribute__((unused))
  35 unsigned 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
  45 static __attribute__((unused))
  46 int 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
  53 static __attribute__((unused))
  54 int 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 */