1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 |
- /* io.h - Virtual disk input/output */
- /* Written 1993 by Werner Almesberger */
- /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
- * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
- #ifndef _IO_H
- #define _IO_H
- #include <sys/types.h> /* for loff_t */
- /* In earlier versions, an own llseek() was used, but glibc lseek() is
- * sufficient (or even better :) for 64 bit offsets in the meantime */
- #define llseek lseek
- void fs_open(char *path,int rw);
- /* Opens the file system PATH. If RW is zero, the file system is opened
- read-only, otherwise, it is opened read-write. */
- void fs_read(loff_t pos,int size,void *data);
- /* Reads SIZE bytes starting at POS into DATA. Performs all applicable
- changes. */
- int fs_test(loff_t pos,int size);
- /* Returns a non-zero integer if SIZE bytes starting at POS can be read without
- errors. Otherwise, it returns zero. */
- void fs_write(loff_t pos,int size,void *data);
- /* If write_immed is non-zero, SIZE bytes are written from DATA to the disk,
- starting at POS. If write_immed is zero, the change is added to a list in
- memory. */
- int fs_close(int write);
- /* Closes the file system, performs all pending changes if WRITE is non-zero
- and removes the list of changes. Returns a non-zero integer if the file
- system has been changed since the last fs_open, zero otherwise. */
- int fs_changed(void);
- /* Determines whether the file system has changed. See fs_close. */
- extern unsigned device_no;
- /* Major number of device (0 if file) and size (in 512 byte sectors) */
- #endif
|