www.pudn.com > rawfs.zip > rawfs.h

/*	rawfs.h - Raw Minix file system support.	Author: Kees J. Bot 
 * 
 *		off_t r_super(void); 
 *			Initialize variables, returns the size of a valid Minix 
 *			file system blocks, but zero on error. 
 * 
 *		void r_stat(ino_t file, struct stat *stp); 
 *			Return information about a file like stat(2) and 
 *			remembers file for the next two calls. 
 * 
 *		off_t r_vir2abs(off_t virblockno); 
 *			Translate virtual block number in file to absolute 
 *			disk block number.  Returns 0 if the file contains 
 *			a hole, or -1 if the block lies past the end of file. 
 * 
 *		ino_t r_readdir(char *name); 
 *			Return next directory entry or 0 if there are no more. 
 *			Returns -1 and sets errno on error. 
 * 
 *		ino_t r_lookup(ino_t cwd, char *path); 
 *			A utility function that translates a pathname to an 
 *			inode number.  It starts from directory "cwd" unless 
 *			path starts with a '/', then from ROOT_INO. 
 *			Returns 0 and sets errno on error. 
 * 
 *	One function needs to be provided by the outside world: 
 * 
 *		void readblock(off_t blockno, char *buf); 
 *			Read a block into the buffer.  Outside world handles 
 *			errors. 
 */ 
 
#define ROOT_INO	((ino_t) 1)	/* Inode nr of root dir. */ 
 
off_t r_super(void); 
void r_stat(Ino_t file, struct stat *stp); 
off_t r_vir2abs(off_t virblockno); 
ino_t r_readdir(char *name); 
ino_t r_lookup(Ino_t cwd, char *path);