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Diffstat (limited to 'device.h')
-rw-r--r-- | device.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/device.h b/device.h new file mode 100644 index 0000000..e577029 --- /dev/null +++ b/device.h @@ -0,0 +1,101 @@ +#ifndef MTOOLS_DEVICE_H +#define MTOOLS_DEVICE_H +/* Copyright 2021 Alain Knaff. + * This file is part of mtools. + * + * Mtools 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. + * + * Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>. + */ + +/* Functions needed to work with struct device */ + +#include "llong.h" + +/* Stuff related to particular device definitions are in devices.c + (note the plural) */ + +#define SCSI_FLAG 0x001u +#define PRIV_FLAG 0x002u +#define NOLOCK_FLAG 0x004u +#define USE_XDF_FLAG 0x008u +#define MFORMAT_ONLY_FLAG 0x010u +#define VOLD_FLAG 0x020u +#define FLOPPYD_FLAG 0x040u +#define FILTER_FLAG 0x080u +#define SWAP_FLAG 0x100u + +#define IS_SCSI(x) ((x) && ((x)->misc_flags & SCSI_FLAG)) +#define IS_PRIVILEGED(x) ((x) && ((x)->misc_flags & PRIV_FLAG)) +#define IS_NOLOCK(x) ((x) && ((x)->misc_flags & NOLOCK_FLAG)) +#define IS_MFORMAT_ONLY(x) ((x) && ((x)->misc_flags & MFORMAT_ONLY_FLAG)) +#define SHOULD_USE_VOLD(x) ((x)&& ((x)->misc_flags & VOLD_FLAG)) +#define SHOULD_USE_XDF(x) ((x)&& ((x)->misc_flags & USE_XDF_FLAG)) +#define DO_SWAP(x) ((x) && ((x)->misc_flags & SWAP_FLAG)) + +typedef struct device { + const char *name; /* full path to device */ + + char drive; /* the drive letter */ + int fat_bits; /* FAT encoding scheme */ + + int mode; /* any special open() flags */ + unsigned int tracks; /* tracks */ + uint16_t heads; /* heads */ + uint16_t sectors; /* sectors */ + unsigned int hidden; /* number of hidden sectors. Used for + * mformatting partitioned devices */ + + off_t offset; /* skip this many bytes */ + + unsigned int partition; + + unsigned int misc_flags; + + /* Linux only stuff */ + uint8_t ssize; + unsigned int use_2m; + + char *precmd; /* command to be executed before opening + * the drive */ + + /* internal variables */ + int file_nr; /* used during parsing */ + unsigned int blocksize; /* size of disk block in bytes */ + + unsigned int codepage; /* codepage for shortname encoding */ + + const char *data_map; + + uint32_t tot_sectors; /* Amount of total sectors, more + * precise than tracks (in case of + * partitions which may take up parts + * of a track) */ + + uint16_t sector_size; /* Non-default sector size */ + + const char *cfg_filename; /* used for debugging purposes */ +} device_t; + +extern struct device *devices; +extern struct device const_devices[]; +extern const unsigned int nr_const_devices; + +int lock_dev(int fd, int mode, struct device *dev); + +void precmd(struct device *dev); + +int check_if_sectors_fit(uint32_t tot_sectors, mt_off_t maxBytes, + uint32_t sectorSize, char *errmsg); +int chs_to_totsectors(struct device *dev, char *errmsg); + +#endif |