unistd.h

/*
 * SPDX-FileCopyrightText: 2016 Eistec AB
 * SPDX-FileCopyrightText: 2015 Kaspar Schleiser <kaspar@schleiser.de>
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once
 
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define STDIN_FILENO    0       /* standard input file descriptor */
#define STDOUT_FILENO   1       /* standard output file descriptor */
#define STDERR_FILENO   2       /* standard error file descriptor */
 
#define F_OK            0
#define R_OK            4
#define W_OK            2
#define X_OK            1
 
#define SEEK_SET        0
#define SEEK_CUR        1
#define SEEK_END        2
 
int          access(const char *, int);
unsigned     alarm(unsigned);
int          chdir(const char *);
int          chown(const char *, uid_t, gid_t);
int          close(int);
size_t       confstr(int, char *, size_t);
int          dup(int);
int          dup2(int, int);
void         _exit(int);
int          execl(const char *, const char *, ...);
int          execle(const char *, const char *, ...);
int          execlp(const char *, const char *, ...);
int          execv(const char *, char *const []);
int          execve(const char *, char *const [], char *const []);
int          execvp(const char *, char *const []);
int          faccessat(int, const char *, int, int);
int          fchdir(int);
int          fchown(int, uid_t, gid_t);
int          fchownat(int, const char *, uid_t, gid_t, int);
int          fexecve(int, char *const [], char *const []);
pid_t        fork(void);
long         fpathconf(int, int);
int          ftruncate(int, off_t);
char        *getcwd(char *, size_t);
gid_t        getegid(void);
uid_t        geteuid(void);
gid_t        getgid(void);
int          getgroups(int, gid_t []);
int          gethostname(char *, size_t);
char        *getlogin(void);
int          getlogin_r(char *, size_t);
int          getopt(int, char * const [], const char *);
pid_t        getpgid(pid_t);
pid_t        getpgrp(void);
pid_t        getpid(void);
pid_t        getppid(void);
pid_t        getsid(pid_t);
uid_t        getuid(void);
int          isatty(int);
int          lchown(const char *, uid_t, gid_t);
int          link(const char *, const char *);
int          linkat(int, const char *, int, const char *, int);
off_t        lseek(int, off_t, int);
long         pathconf(const char *, int);
int          pause(void);
int          pipe(int [2]);
ssize_t      pread(int, void *, size_t, off_t);
ssize_t      pwrite(int, const void *, size_t, off_t);
ssize_t      read(int, void *, size_t);
ssize_t      readlink(const char *__restrict, char *__restrict, size_t);
ssize_t      readlinkat(int, const char *__restrict, char *__restrict, size_t);
int          rmdir(const char *);
int          setegid(gid_t);
int          seteuid(uid_t);
int          setgid(gid_t);
int          setpgid(pid_t, pid_t);
pid_t        setsid(void);
int          setuid(uid_t);
unsigned     sleep(unsigned);
int          symlink(const char *, const char *);
int          symlinkat(const char *, int, const char *);
long         sysconf(int);
pid_t        tcgetpgrp(int);
int          tcsetpgrp(int, pid_t);
int          truncate(const char *, off_t);
char        *ttyname(int);
int          ttyname_r(int, char *, size_t);
int          unlink(const char *);
int          unlinkat(int, const char *, int);
int          usleep(useconds_t);
ssize_t      write(int, const void *, size_t);
 
#ifdef __cplusplus
}
#endif