unistd.h

   1 #include <stddef.h>
   2
   3 #define SEEK_SET        0
   4 #define SEEK_CUR        1
   5 #define SEEK_END        2
   6
   7 #define STDIN_FILENO    0
   8 #define STDOUT_FILENO   1
   9 #define STDERR_FILENO   2
  10
  11 #define R_OK            4
  12 #define W_OK            2
  13 #define X_OK            1
  14 #define F_OK            0
  15 int access(char *name, int type);
  16
  17 extern char **environ;
  18
  19 int close(int fd);
  20 int write(int fd, void *buf, int n);
  21 int read(int fd, void *buf, int n);
  22 void _exit(int status);
  23 int execve(char *path, char *argv[], char *envp[]);
  24 int execle(char *path, ...);
  25 int sleep(int n);