mirror of
https://review.haiku-os.org/haiku
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17049c451a
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@11909 a95241bf-73f2-0310-859d-f6bbb57e9c96
170 lines
4.7 KiB
C
170 lines
4.7 KiB
C
/*
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mkdos shell tool
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Initialize FAT16 or FAT32 partitions, FAT12 floppy disks not supported
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Copyright (c) 2002 Marcus Overhagen <marcus@overhagen.de>, OpenBeOS project
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#define ATTRIBUTE_PACKED __attribute__((packed))
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struct bootsector1216 {
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uint8 BS_jmpBoot[3];
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uint8 BS_OEMName[8];
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uint16 BPB_BytsPerSec;
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uint8 BPB_SecPerClus;
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uint16 BPB_RsvdSecCnt;
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uint8 BPB_NumFATs;
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uint16 BPB_RootEntCnt;
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uint16 BPB_TotSec16;
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uint8 BPB_Media;
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uint16 BPB_FATSz16;
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uint16 BPB_SecPerTrk;
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uint16 BPB_NumHeads;
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uint32 BPB_HiddSec;
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uint32 BPB_TotSec32;
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uint8 BS_DrvNum;
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uint8 BS_Reserved1;
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uint8 BS_BootSig;
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uint8 BS_VolID[4];
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uint8 BS_VolLab[11];
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uint8 BS_FilSysType[8];
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uint8 bootcode[448];
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uint16 signature;
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} ATTRIBUTE_PACKED;
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struct bootsector32 {
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uint8 BS_jmpBoot[3];
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uint8 BS_OEMName[8];
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uint16 BPB_BytsPerSec;
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uint8 BPB_SecPerClus;
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uint16 BPB_RsvdSecCnt;
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uint8 BPB_NumFATs;
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uint16 BPB_RootEntCnt;
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uint16 BPB_TotSec16;
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uint8 BPB_Media;
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uint16 BPB_FATSz16;
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uint16 BPB_SecPerTrk;
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uint16 BPB_NumHeads;
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uint32 BPB_HiddSec;
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uint32 BPB_TotSec32;
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uint32 BPB_FATSz32;
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uint16 BPB_ExtFlags;
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uint16 BPB_FSVer;
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uint32 BPB_RootClus;
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uint16 BPB_FSInfo;
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uint16 BPB_BkBootSec;
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uint8 BPB_Reserved[12];
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uint8 BS_DrvNum;
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uint8 BS_Reserved1;
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uint8 BS_BootSig;
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uint8 BS_VolID[4];
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uint8 BS_VolLab[11];
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uint8 BS_FilSysType[8];
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uint8 bootcode[420];
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uint16 signature;
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} ATTRIBUTE_PACKED;
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struct fsinfosector32 {
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uint32 FSI_LeadSig;
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uint8 FSI_Reserved1[480];
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uint32 FSI_StrucSig;
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uint32 FSI_Free_Count;
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uint32 FSI_Nxt_Free;
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uint8 FSI_Reserved2[12];
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uint32 FSI_TrailSig;
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} ATTRIBUTE_PACKED;
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// a FAT directory entry
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struct dirent {
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uint8 Name[11];
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uint8 Attr;
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uint8 NTRes;
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uint8 CrtTimeTenth;
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uint16 CrtTime;
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uint16 CrtDate;
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uint16 LstAccDate;
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uint16 FstClusHI;
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uint16 WrtTime;
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uint16 WrtDate;
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uint16 FstClusLO;
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uint32 FileSize;
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} ATTRIBUTE_PACKED;
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//maximum size of a 2,88 MB floppy
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#define FLOPPY_MAX_SIZE (2 * 80 * 36 * 512)
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//maximum size of a cluster
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#define CLUSTER_MAX_SIZE 32768
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//not sure if that's correct
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#define FAT12_CLUSTER_MAX_SIZE 1024
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//limits
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#define FAT12_MAX_CLUSTER_COUNT 4084LL
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#define FAT16_MAX_CLUSTER_COUNT 65524LL
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#define FAT32_MAX_CLUSTER_COUNT 0x0fffffffLL
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#define BOOTJMP_START_OFFSET 0x00
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uint8 bootjmp[] = {
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0xeb, 0x7e, 0x90
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};
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#define BOOTCODE_START_OFFSET 0x80
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uint8 bootcode[] = {
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0x31, 0xc0, 0x8e, 0xd0, 0xbc, 0x00, 0x7c, 0x8e,
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0xd8, 0xb4, 0x0e, 0x31, 0xdb, 0xbe, 0x00, 0x7d,
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0xfc, 0xac, 0x08, 0xc0, 0x74, 0x04, 0xcd, 0x10,
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0xeb, 0xf7, 0xb4, 0x00, 0xcd, 0x16, 0xcd, 0x19,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x6f, 0x72, 0x72, 0x79, 0x2c, 0x20, 0x74,
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0x68, 0x69, 0x73, 0x20, 0x64, 0x69, 0x73, 0x6b,
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0x20, 0x69, 0x73, 0x20, 0x6e, 0x6f, 0x74, 0x20,
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0x62, 0x6f, 0x6f, 0x74, 0x61, 0x62, 0x6c, 0x65,
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0x2e, 0x0d, 0x0a, 0x50, 0x6c, 0x65, 0x61, 0x73,
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0x65, 0x20, 0x70, 0x72, 0x65, 0x73, 0x73, 0x20,
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0x61, 0x6e, 0x79, 0x20, 0x6b, 0x65, 0x79, 0x20,
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0x74, 0x6f, 0x20, 0x72, 0x65, 0x62, 0x6f, 0x6f,
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0x74, 0x2e, 0x0d, 0x0a, 0x00
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};
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#define BOOT_SECTOR_NUM 0
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#define FSINFO_SECTOR_NUM 1
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#define BACKUP_SECTOR_NUM 6
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#define FAT32_ROOT_CLUSTER 2
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