Yi Kong | 39bbd96 | 2022-01-09 19:41:38 +0800 | [diff] [blame] | 1 | #ifndef MTOOLS_DEVICE_H |
| 2 | #define MTOOLS_DEVICE_H |
| 3 | /* Copyright 2021 Alain Knaff. |
| 4 | * This file is part of mtools. |
| 5 | * |
| 6 | * Mtools is free software: you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation, either version 3 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * Mtools is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with Mtools. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | /* Functions needed to work with struct device */ |
| 21 | |
| 22 | #include "llong.h" |
| 23 | |
| 24 | /* Stuff related to particular device definitions are in devices.c |
| 25 | (note the plural) */ |
| 26 | |
| 27 | #define SCSI_FLAG 0x001u |
| 28 | #define PRIV_FLAG 0x002u |
| 29 | #define NOLOCK_FLAG 0x004u |
| 30 | #define USE_XDF_FLAG 0x008u |
| 31 | #define MFORMAT_ONLY_FLAG 0x010u |
| 32 | #define VOLD_FLAG 0x020u |
| 33 | #define FLOPPYD_FLAG 0x040u |
| 34 | #define FILTER_FLAG 0x080u |
| 35 | #define SWAP_FLAG 0x100u |
| 36 | |
| 37 | #define IS_SCSI(x) ((x) && ((x)->misc_flags & SCSI_FLAG)) |
| 38 | #define IS_PRIVILEGED(x) ((x) && ((x)->misc_flags & PRIV_FLAG)) |
| 39 | #define IS_NOLOCK(x) ((x) && ((x)->misc_flags & NOLOCK_FLAG)) |
| 40 | #define IS_MFORMAT_ONLY(x) ((x) && ((x)->misc_flags & MFORMAT_ONLY_FLAG)) |
| 41 | #define SHOULD_USE_VOLD(x) ((x)&& ((x)->misc_flags & VOLD_FLAG)) |
| 42 | #define SHOULD_USE_XDF(x) ((x)&& ((x)->misc_flags & USE_XDF_FLAG)) |
| 43 | #define DO_SWAP(x) ((x) && ((x)->misc_flags & SWAP_FLAG)) |
| 44 | |
| 45 | typedef struct device { |
| 46 | const char *name; /* full path to device */ |
| 47 | |
| 48 | char drive; /* the drive letter */ |
| 49 | int fat_bits; /* FAT encoding scheme */ |
| 50 | |
| 51 | int mode; /* any special open() flags */ |
| 52 | unsigned int tracks; /* tracks */ |
| 53 | uint16_t heads; /* heads */ |
| 54 | uint16_t sectors; /* sectors */ |
| 55 | unsigned int hidden; /* number of hidden sectors. Used for |
| 56 | * mformatting partitioned devices */ |
| 57 | |
| 58 | off_t offset; /* skip this many bytes */ |
| 59 | |
| 60 | unsigned int partition; |
| 61 | |
| 62 | unsigned int misc_flags; |
| 63 | |
| 64 | /* Linux only stuff */ |
| 65 | uint8_t ssize; |
| 66 | unsigned int use_2m; |
| 67 | |
| 68 | char *precmd; /* command to be executed before opening |
| 69 | * the drive */ |
| 70 | |
| 71 | /* internal variables */ |
| 72 | int file_nr; /* used during parsing */ |
| 73 | unsigned int blocksize; /* size of disk block in bytes */ |
| 74 | |
| 75 | unsigned int codepage; /* codepage for shortname encoding */ |
| 76 | |
| 77 | const char *data_map; |
| 78 | |
| 79 | uint32_t tot_sectors; /* Amount of total sectors, more |
| 80 | * precise than tracks (in case of |
| 81 | * partitions which may take up parts |
| 82 | * of a track) */ |
| 83 | |
| 84 | uint16_t sector_size; /* Non-default sector size */ |
| 85 | |
| 86 | const char *cfg_filename; /* used for debugging purposes */ |
| 87 | } device_t; |
| 88 | |
| 89 | extern struct device *devices; |
| 90 | extern struct device const_devices[]; |
| 91 | extern const unsigned int nr_const_devices; |
| 92 | |
| 93 | int lock_dev(int fd, int mode, struct device *dev); |
| 94 | |
| 95 | void precmd(struct device *dev); |
| 96 | |
| 97 | int check_if_sectors_fit(uint32_t tot_sectors, mt_off_t maxBytes, |
| 98 | uint32_t sectorSize, char *errmsg); |
| 99 | int chs_to_totsectors(struct device *dev, char *errmsg); |
| 100 | |
| 101 | #endif |