summaryrefslogtreecommitdiffstats
path: root/fs/fdos/dos.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/fdos/dos.h')
-rw-r--r--fs/fdos/dos.h177
1 files changed, 177 insertions, 0 deletions
diff --git a/fs/fdos/dos.h b/fs/fdos/dos.h
new file mode 100644
index 0000000000..71701c9fb0
--- /dev/null
+++ b/fs/fdos/dos.h
@@ -0,0 +1,177 @@
+/*
+ * (C) Copyright 2002
+ * Stubli Faverges - <www.staubli.com>
+ * 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
+
OpenPOWER on IntegriCloud