unistd.h

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#ifndef _UNISTD_H_
#define _UNISTD_H_

#include <sys/cdefs.h>

__BEGIN_DECLS

#include <sys/types.h>
#include <sys/stat.h>

#define STDIN_FILENO  0
#define STDOUT_FILENO 1
#define STDERR_FILENO 1

int chdir(const char *path);


const char * getcwd(char * buf, size_t size);

char * get_absolute_path(const char *dirname);

pid_t getpid(void);

pid_t getppid(void);

void syscall(uint32_t func, uint32_t param1, uint32_t param2, uint32_t param3);

unsigned int sleep(unsigned int seconds);

unsigned int usleep(unsigned int microseconds);

ssize_t write(int fd, const void *buf, size_t count);

ssize_t read(int fd, void *buf, size_t count);

int lseek(int fd, long offset, int whence);

int stat(const char *path, struct stat *buf);

int lstat(const char *path, struct stat *buf);

int unlink(const char *pathname);

int rmdir(const char *pathname);

int mknod(const char *path, mode_t mode, dev_t dev);

int gethostname(char *name, size_t len);

int dup(int oldfd);
int dup2(int oldfd, int newfd);

int isatty(int fd);

int execv(const char *path, char *const argv[]);

int chown(const char *path, uid_t owner, gid_t group);

int exec_elf(const char *path);

ssize_t readlink(const char *path, char *buf, size_t bufsize);

__END_DECLS

#endif //_UNISTD_H_