/* * (C) Copyright 2002 * Stäubli Faverges - * Pierre AUBERT p.aubert@staubli.com * * See file CREDITS for list of people who contributed to this * project. * * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #ifndef _DOS_H_ #define _DOS_H_ /* Definitions for Dos diskettes */ /* General definitions */ #define SZ_STD_SECTOR 512 /* Standard sector size */ #define MDIR_SIZE 32 /* Direntry size */ #define FAT_BITS 12 /* Diskette use 12 bits fat */ #define MAX_PATH 128 /* Max size of the MSDOS PATH */ #define MAX_DIR_SECS 64 /* Taille max d'un repertoire (en */ /* secteurs) */ /* Misc. definitions */ #define DELMARK '\xe5' #define EXTENDED_BOOT (0x29) #define MEDIA_STD (0xf0) #define JUMP_0_1 (0xe9) #define JUMP_0_2 (0xeb) /* Boot size is 256 bytes, but we need to read almost a sector, then assume bootsize is 512 */ #define BOOTSIZE 512 /* Fat definitions for 12 bits fat */ #define FAT12_MAX_NB 4086 #define FAT12_LAST 0x0ff6 #define FAT12_END 0x0fff /* file attributes */ #define ATTR_READONLY 0x01 #define ATTR_HIDDEN 0x02 #define ATTR_SYSTEM 0x04 #define ATTR_VOLUME 0x08 #define ATTR_DIRECTORY 0x10 #define ATTR_ARCHIVE 0x20 #define ATTR_VSE 0x0f /* Name format */ #define EXTCASE 0x10 #define BASECASE 0x8 /* Definition of the boot sector */ #define BANNER_LG 8 #define LABEL_LG 11 typedef struct bootsector { unsigned char jump [3]; /* 0 Jump to boot code */ char banner [BANNER_LG]; /* 3 OEM name & version */ unsigned short secsiz; /* 11 Bytes per sector hopefully 512 */ unsigned char clsiz; /* 13 Cluster size in sectors */ unsigned short nrsvsect; /* 14 Number of reserved (boot) sectors */ unsigned char nfat; /* 16 Number of FAT tables hopefully 2 */ unsigned short dirents; /* 17 Number of directory slots */ unsigned short psect; /* 19 Total sectors on disk */ unsigned char descr; /* 21 Media descriptor=first byte of FAT */ unsigned short fatlen; /* 22 Sectors in FAT */ unsigned short nsect; /* 24 Sectors/track */ unsigned short nheads; /* 26 Heads */ unsigned int nhs; /* 28 number of hidden sectors */ unsigned int bigsect; /* 32 big total sectors */ unsigned char physdrive; /* 36 physical drive ? */ unsigned char reserved; /* 37 reserved */ unsigned char dos4; /* 38 dos > 4.0 diskette */ unsigned int serial; /* 39 serial number */ char label [LABEL_LG]; /* 43 disk label */ char fat_type [8]; /* 54 FAT type */ unsigned char res_2m; /* 62 reserved by 2M */ unsigned char CheckSum; /* 63 2M checksum (not used) */ unsigned char fmt_2mf; /* 64 2MF format version */ unsigned char wt; /* 65 1 if write track after format */ unsigned char rate_0; /* 66 data transfer rate on track 0 */ unsigned char rate_any; /* 67 data transfer rate on track<>0 */ unsigned short BootP; /* 68 offset to boot program */ unsigned short Infp0; /* 70 T1: information for track 0 */ unsigned short InfpX; /* 72 T2: information for track<>0 */ unsigned short InfTm; /* 74 T3: track sectors size table */ unsigned short DateF; /* 76 Format date */ unsigned short TimeF; /* 78 Format time */ unsigned char junk [BOOTSIZE - 80]; /* 80 remaining data */ } __attribute__ ((packed)) BootSector_t; /* Structure d'une entree de repertoire */ typedef struct directory { char name [8]; /* file name */ char ext [3]; /* file extension */ unsigned char attr; /* attribute byte */ unsigned char Case; /* case of short filename */ unsigned char reserved [9]; /* ?? */ unsigned char time [2]; /* time stamp */ unsigned char date [2]; /* date stamp */ unsigned short start; /* starting cluster number */ unsigned int size; /* size of the file */ } __attribute__ ((packed)) Directory_t; #define MAX_VFAT_SUBENTRIES 20 #define VSE_NAMELEN 13 #define VSE1SIZE 5 #define VSE2SIZE 6 #define VSE3SIZE 2 #define VBUFSIZE ((MAX_VFAT_SUBENTRIES * VSE_NAMELEN) + 1) #define MAX_VNAMELEN (255) #define VSE_PRESENT 0x01 #define VSE_LAST 0x40 #define VSE_MASK 0x1f /* Flag used by vfat_lookup */ #define DO_OPEN 1 #define ACCEPT_PLAIN 0x20 #define ACCEPT_DIR 0x10 #define ACCEPT_LABEL 0x08 #define SINGLE 2 #define MATCH_ANY 0x40 struct vfat_subentry { unsigned char id; /* VSE_LAST pour la fin, VSE_MASK */ /* pour un VSE */ char text1 [VSE1SIZE * 2]; /* Caracteres encodes sur 16 bits */ unsigned char attribute; /* 0x0f pour les VFAT */ unsigned char hash1; /* toujours 0 */ unsigned char sum; /* Checksum du nom court */ char text2 [VSE2SIZE * 2]; /* Caracteres encodes sur 16 bits */ unsigned char sector_l; /* 0 pour les VFAT */ unsigned char sector_u; /* 0 pour les VFAT */ char text3 [VSE3SIZE * 2]; /* Caracteres encodes sur 16 bits */ } __attribute__ ((packed)) ; struct vfat_state { char name [VBUFSIZE]; int status; /* is now a bit map of 32 bits */ int subentries; unsigned char sum; /* no need to remember the sum for each */ /* entry, it is the same anyways */ } __attribute__ ((packed)) ; /* Conversion macros */ #define DOS_YEAR(dir) (((dir)->date[1] >> 1) + 1980) #define DOS_MONTH(dir) (((((dir)->date[1]&0x1) << 3) + ((dir)->date[0] >> 5))) #define DOS_DAY(dir) ((dir)->date[0] & 0x1f) #define DOS_HOUR(dir) ((dir)->time[1] >> 3) #define DOS_MINUTE(dir) (((((dir)->time[1]&0x7) << 3) + ((dir)->time[0] >> 5))) #define DOS_SEC(dir) (((dir)->time[0] & 0x1f) * 2) #endif