From 9c754053b07a724bdd98d039f34899d6a49115b7 Mon Sep 17 00:00:00 2001 From: bigbiff bigbiff Date: Wed, 9 Jan 2013 09:09:08 -0500 Subject: Add libtar to TWRP instead of using busybox tar Add proper mkdosfs tool Add fuse to TWRP Add experimental exfat-fuse to TWRP Convert all system() functions to use new Exec_Cmd function --- dosfstools/src/fat.h | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 dosfstools/src/fat.h (limited to 'dosfstools/src/fat.h') diff --git a/dosfstools/src/fat.h b/dosfstools/src/fat.h new file mode 100644 index 000000000..13ac1b345 --- /dev/null +++ b/dosfstools/src/fat.h @@ -0,0 +1,84 @@ +/* fat.h - Read/write access to the FAT + + Copyright (C) 1993 Werner Almesberger + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + + On Debian systems, the complete text of the GNU General Public License + can be found in /usr/share/common-licenses/GPL-3 file. +*/ + +#ifndef _FAT_H +#define _FAT_H + +void read_fat(DOS_FS * fs); + +/* Loads the FAT of the file system described by FS. Initializes the FAT, + replaces broken FATs and rejects invalid cluster entries. */ + +void get_fat(FAT_ENTRY * entry, void *fat, unsigned long cluster, DOS_FS * fs); + +/* Retrieve the FAT entry (next chained cluster) for CLUSTER. */ + +void set_fat(DOS_FS * fs, unsigned long cluster, unsigned long new); + +/* Changes the value of the CLUSTERth cluster of the FAT of FS to NEW. Special + values of NEW are -1 (EOF, 0xff8 or 0xfff8) and -2 (bad sector, 0xff7 or + 0xfff7) */ + +int bad_cluster(DOS_FS * fs, unsigned long cluster); + +/* Returns a non-zero integer if the CLUSTERth cluster is marked as bad or zero + otherwise. */ + +unsigned long next_cluster(DOS_FS * fs, unsigned long cluster); + +/* Returns the number of the cluster following CLUSTER, or -1 if this is the + last cluster of the respective cluster chain. CLUSTER must not be a bad + cluster. */ + +loff_t cluster_start(DOS_FS * fs, unsigned long cluster); + +/* Returns the byte offset of CLUSTER, relative to the respective device. */ + +void set_owner(DOS_FS * fs, unsigned long cluster, DOS_FILE * owner); + +/* Sets the owner pointer of the respective cluster to OWNER. If OWNER was NULL + before, it can be set to NULL or any non-NULL value. Otherwise, only NULL is + accepted as the new value. */ + +DOS_FILE *get_owner(DOS_FS * fs, unsigned long cluster); + +/* Returns the owner of the repective cluster or NULL if the cluster has no + owner. */ + +void fix_bad(DOS_FS * fs); + +/* Scans the disk for currently unused bad clusters and marks them as bad. */ + +void reclaim_free(DOS_FS * fs); + +/* Marks all allocated, but unused clusters as free. */ + +void reclaim_file(DOS_FS * fs); + +/* Scans the FAT for chains of allocated, but unused clusters and creates files + for them in the root directory. Also tries to fix all inconsistencies (e.g. + loops, shared clusters, etc.) in the process. */ + +unsigned long update_free(DOS_FS * fs); + +/* Updates free cluster count in FSINFO sector. */ + +#endif -- cgit v1.2.3