#include <debug.h>
typedef int pid_t;
+#define PID_ERROR ((pid_t) -1)
+
+typedef int mapid_t;
+#define MAP_FAILED ((mapid_t) -1)
void halt (void) NO_RETURN;
void exit (int status) NO_RETURN;
-pid_t exec (const char *);
-int join (pid_t);
-bool create (const char *);
-bool remove (const char *);
-int open (const char *);
-int read (int fd, void *, unsigned);
-int write (int fd, const void *, unsigned);
+pid_t exec (const char *file);
+int wait (pid_t);
+bool create (const char *file, unsigned initial_size);
+bool remove (const char *file);
+int open (const char *file);
+int filesize (int fd);
+int read (int fd, void *buffer, unsigned length);
+int write (int fd, const void *buffer, unsigned length);
+void seek (int fd, unsigned position);
+unsigned tell (int fd);
void close (int fd);
+mapid_t mmap (int fd, void *addr);
+void munmap (mapid_t);
+bool chdir (const char *dir);
+bool mkdir (const char *dir);
+void lsdir (void);
#endif /* lib/user/syscall.h */