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mkfs: first working version

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It can create a basic filesystem of arbitrary size.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross
2019-06-09 15:48:07 +08:00
parent ab97abe22a
commit f68f8215b7
5 changed files with 141 additions and 46 deletions
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18
include/fat12.h
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@ -3,6 +3,8 @@
#include <stdint.h>
void fat12_write_u8(void *ptr, uint8_t val);
uint8_t fat12_read_u8(void *ptr);
void fat12_write_u16(void *ptr, uint16_t val);
uint16_t fat12_read_u16(void *ptr);
void fat12_set_cluster(void *fat, uint32_t cluster, uint32_t value);
@ -11,4 +13,20 @@ uint32_t fat12_get_cluster(void *fat, uint32_t cluster);
int fat12_defrag(int fd);
int fat12_mkfs(int fd, uint32_t bytes);
struct fat_directory_entry {
uint8_t file_name[8];
uint8_t extension[3];
uint8_t file_attributes;
uint8_t reserved1;
uint8_t ctime_ms;
uint8_t ctime_hms[2];
uint8_t ctime_date[2];
uint8_t atime_date[2];
uint8_t ea_index[2];
uint8_t mtime_hms[2];
uint8_t mtime_date[2];
uint8_t first_cluster[2];
uint8_t file_size[4];
};
#endif /* PANG_O_LIN_FAT12_H__ */