extern ssize_t write(int fd, const void *buf, size_t count);
extern ssize_t read(int fd, void *buf, size_t count);
+extern off_t lseek(int fd, off_t offset, int whence);
extern int fork(void);
extern int execv(const char *b, char *v[]);
#define S_IXOTH 00001
extern int chmod(const char *path, mode_t mode);
+extern pid_t setsid(void);
+
extern uid_t getuid(void);
extern uid_t geteuid(void);
extern pid_t getpid(void);
#define SIGTSTP 102
extern int kill(pid_t pid, int sig);
+extern int chdir(const char *dir);
+
+// Deprecated POSIX.1-2001
+#define PASS_MAX 63
+extern char *getpass(const char *prompt);
#endif