/* check.h  -  Check and repair a PC/MS-DOS file system *//* Written 1993 by Werner Almesberger */#ifndef _CHECK_H#define _CHECK_Hloff_t alloc_rootdir_entry(DOS_FS *fs, DIR_ENT *de, const char *pattern);/* Allocate a free slot in the root directory for a new file. The file name is   constructed after 'pattern', which must include a %d type format for printf   and expand to exactly 11 characters. The name actually used is written into   the 'de' structure, the rest of *de is cleared. The offset returned is to   where in the filesystem the entry belongs. */int scan_root(DOS_FS *fs);/* Scans the root directory and recurses into all subdirectories. See check.c   for all the details. Returns a non-zero integer if the file system has to   be checked again. */#endif