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