Volume-centric VFS implementation

libsystem/system.h

@@ -51,19 +51,19 @@ void* argument_ptr (void);
 int device_do (int device_id, int cmd, void* a1, void* a2, void* a3, void* a4);
 
 /* Run external ELF program */
-int exec (const char* path);
+int exec (const char* volume, const char* path);
 
 /* Open a file */
-int open (const char* path);
+int volume_open (const char* volume);
 
 /* Close a file */
-int close (int handle);
+int volume_close (void);
 
 /* Read a file */
-int read (int handle, size_t off, uint8_t* buffer, size_t size);
+int read (const char* path, size_t off, uint8_t* buffer, size_t size);
 
 /* describe a file */
-int describe (int handle, struct desc* desc);
+int describe (const char* path, struct desc* desc);
 
 /* send a message to a procgroup's mail */
 int mail_send (int pgid, void* mesg, size_t mesg_size);