#ifndef _UNISTD_H
#define _UNISTD_H

#include <sys/types.h>

int chdir(const char *);
int close(int);
char *getcwd(char *, size_t);
pid_t getpid(void);
pid_t getppid(void);
int isatty(int);
off_t lseek(int, off_t, int); /* SEEK_ */
ssize_t read(int, void *, size_t);
ssize_t write(int, const void *, size_t);
ssize_t readlink(const char *, char *, size_t);
int unlink(const char *);
int rmdir(const char *);
int usleep(useconds_t);
int ftruncate(int, off_t);
long sysconf(int);
int execv(const char *, char *const []);

#define _SC_PAGESIZE 1
#define _SC_PAGE_SIZE _SC_PAGESIZE

#endif