boot.c File Reference

#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include "common.h"
#include "fsck.fat.h"
#include "fat.h"
#include "io.h"
#include "boot.h"
#include "check.h"
#include "charconv.h"

Include dependency graph for boot.c:

Go to the source code of this file.

Macros
#define	ROUND_TO_MULTIPLE(n, m)   ((n) && (m) ? (n)+(m)-1-((n)-1)%(m) : 0)
#define	FAT12_THRESHOLD   4085
#define	FAT16_THRESHOLD   65525
#define	GET_UNALIGNED_W(f)    ( (uint16_t)f[0] | ((uint16_t)f[1]<<8) )

Functions
off_t	alloc_rootdir_entry (DOS_FS *fs, DIR_ENT *de, const char *pattern, int gen_name)
static const char *	get_media_descr (unsigned char media)
static void	dump_boot (DOS_FS *fs, struct boot_sector *b, unsigned lss)
static void	check_backup_boot (DOS_FS *fs, struct boot_sector *b, unsigned int lss)
static void	init_fsinfo_except_reserved (struct info_sector *i)
static void	read_fsinfo (DOS_FS *fs, struct boot_sector *b, unsigned int lss)
void	read_boot (DOS_FS *fs)
static void	write_boot_label_or_serial (int label_mode, DOS_FS *fs, const char *label, uint32_t serial)
void	write_boot_label (DOS_FS *fs, const char *label)
void	write_serial (DOS_FS *fs, uint32_t serial)
off_t	find_volume_de (DOS_FS *fs, DIR_ENT *de)
void	write_volume_label (DOS_FS *fs, char *label)
void	write_label (DOS_FS *fs, char *label)
void	remove_label (DOS_FS *fs)
const char *	pretty_label (const char *label)

Variables
struct {
uint8_t   media
const char *   descr
}	mediabytes []

Macro Definition Documentation

FAT12_THRESHOLD

#define FAT12_THRESHOLD   4085

Definition at line 49 of file boot.c.

FAT16_THRESHOLD

#define FAT16_THRESHOLD   65525

Definition at line 50 of file boot.c.

GET_UNALIGNED_W

#define GET_UNALIGNED_W

(

f

)

( (uint16_t)f[0] | ((uint16_t)f[1]<<8) )

Definition at line 195 of file boot.c.

ROUND_TO_MULTIPLE

#define ROUND_TO_MULTIPLE	(		n,
			m
	)		((n) && (m) ? (n)+(m)-1-((n)-1)%(m) : 0)

Definition at line 45 of file boot.c.

Function Documentation

alloc_rootdir_entry()

off_t alloc_rootdir_entry	(	DOS_FS *	fs,
		DIR_ENT *	de,
		const char *	pattern,
		int	gen_name
	)

Definition at line 52 of file boot.c.

References alloc(), DIR_ENT::attr, DOS_FS::cluster_size, cluster_start(), DOS_FS::data_clusters, die(), DOS_FS::fat, fs_read(), fs_write(), get_fat(), get_owner(), IS_FREE, MSDOS_NAME, n_files, DIR_ENT::name, next_cluster(), root, DOS_FS::root_cluster, DOS_FS::root_entries, DOS_FS::root_start, set_fat(), set_owner(), FAT_ENTRY::value, and VFAT_LN_ATTR.

Referenced by reclaim_file(), and write_volume_label().

check_backup_boot()

static void check_backup_boot ( DOS_FS *  fs, struct boot_sector *  b, unsigned int  lss  )

static

Definition at line 262 of file boot.c.

References boot_sector::backup_boot, backup_boot, DOS_FS::backupboot_start, fs_read(), fs_write(), get_choice(), boot_sector::info_sector, and boot_sector::reserved.

Referenced by read_boot().

dump_boot()

static void dump_boot ( DOS_FS *  fs, struct boot_sector *  b, unsigned  lss  )

static

Definition at line 209 of file boot.c.

References atari_format, DOS_FS::cluster_size, DOS_FS::data_clusters, DOS_FS::data_start, DOS_FS::fat_bits, DOS_FS::fat_size, DOS_FS::fat_start, boot_sector::fats, get_media_descr(), GET_UNALIGNED_W, boot_sector::heads, boot_sector::hidden, boot_sector::media, boot_sector::reserved, DOS_FS::root_cluster, DOS_FS::root_entries, DOS_FS::root_start, boot_sector::secs_track, boot_sector::sector_size, boot_sector::sectors, boot_sector::system_id, and boot_sector::total_sect.

Referenced by read_boot().

find_volume_de()

off_t find_volume_de	(	DOS_FS *	fs,
		DIR_ENT *	de
	)

Definition at line 629 of file boot.c.

References DIR_ENT::attr, ATTR_VOLUME, DOS_FS::cluster_size, cluster_start(), fs_read(), IS_FREE, DIR_ENT::name, next_cluster(), DOS_FS::root_cluster, DOS_FS::root_entries, DOS_FS::root_start, and VFAT_LN_ATTR.

Referenced by check_label(), handle_label(), remove_label(), and write_volume_label().

get_media_descr()

static const char* get_media_descr ( unsigned char  media )

static

Definition at line 198 of file boot.c.

References descr, media, and mediabytes.

Referenced by dump_boot().

init_fsinfo_except_reserved()

static void init_fsinfo_except_reserved ( struct info_sector *  i )

static

Definition at line 338 of file boot.c.

References info_sector::boot_sign, info_sector::free_clusters, info_sector::magic, info_sector::next_cluster, and info_sector::signature.

Referenced by read_fsinfo().

pretty_label()

const char* pretty_label

(

const char *

label

)

Definition at line 747 of file boot.c.

References dos_char_to_printable(), and last.

Referenced by check_boot_label(), check_label(), and handle_label().

read_boot()

void read_boot

(

DOS_FS *

fs

)

Definition at line 415 of file boot.c.

References atari_format, boot_sector::backup_boot, DOS_FS::backupboot_start, check_backup_boot(), boot_sector::cluster_size, DOS_FS::cluster_size, DOS_FS::data_clusters, DOS_FS::data_start, die(), boot_sector::dir_entries, dump_boot(), DOS_FS::eff_fat_bits, boot_sector::extended_sig, boot_sector_16::extended_sig, FAT12_THRESHOLD, FAT16_THRESHOLD, boot_sector::fat32_length, DOS_FS::fat_bits, boot_sector::fat_length, DOS_FS::fat_size, DOS_FS::fat_start, boot_sector::fats, DOS_FS::free_clusters, fs_read(), fs_test(), DOS_FS::fsinfo_start, GET_UNALIGNED_W, boot_sector::heads, boot_sector::label, boot_sector_16::label, DOS_FS::label, MSDOS_DIR_BITS, MSDOS_DPS, DOS_FS::nfats, OFF_MAX, read_fsinfo(), boot_sector::reserved, boot_sector::root_cluster, DOS_FS::root_cluster, DOS_FS::root_entries, DOS_FS::root_start, ROUND_TO_MULTIPLE, boot_sector::secs_track, boot_sector::sector_size, SECTOR_SIZE, boot_sector::sectors, boot_sector::serial, boot_sector_16::serial, DOS_FS::serial, boot_sector::total_sect, and verbose.

Referenced by handle_label(), handle_volid(), and main().

read_fsinfo()

static void read_fsinfo ( DOS_FS *  fs, struct boot_sector *  b, unsigned int  lss  )

static

Definition at line 347 of file boot.c.

References boot_sector::backup_boot, DOS_FS::backupboot_start, info_sector::boot_sign, info_sector::free_clusters, DOS_FS::free_clusters, fs_read(), fs_write(), DOS_FS::fsinfo_start, get_choice(), boot_sector::info_sector, init_fsinfo_except_reserved(), info_sector::magic, boot_sector::reserved, and info_sector::signature.

Referenced by read_boot().

remove_label()

void remove_label

(

DOS_FS *

fs

)

Definition at line 729 of file boot.c.

References DIR_ENT::attr, find_volume_de(), fs_write(), DIR_ENT::name, and write_boot_label().

Referenced by check_label(), and handle_label().

write_boot_label()

void write_boot_label	(	DOS_FS *	fs,
		const char *	label
	)

Definition at line 619 of file boot.c.

References boot_sector::label, and write_boot_label_or_serial().

Referenced by check_boot_label(), check_label(), remove_label(), and write_label().

write_boot_label_or_serial()

static void write_boot_label_or_serial ( int  label_mode, DOS_FS *  fs, const char *  label, uint32_t  serial  )

static

Definition at line 576 of file boot.c.

References DOS_FS::backupboot_start, boot_sector::extended_sig, boot_sector_16::extended_sig, DOS_FS::fat_bits, fs_read(), boot_sector::fs_type, boot_sector_16::fs_type, fs_write(), boot_sector::label, boot_sector_16::label, boot_sector::serial, and boot_sector_16::serial.

Referenced by write_boot_label(), and write_serial().

write_label()

void write_label	(	DOS_FS *	fs,
		char *	label
	)

Definition at line 718 of file boot.c.

References write_boot_label(), and write_volume_label().

Referenced by check_label(), and handle_label().

write_serial()

void write_serial	(	DOS_FS *	fs,
		uint32_t	serial
	)

Definition at line 624 of file boot.c.

References boot_sector::serial, and write_boot_label_or_serial().

Referenced by handle_volid().

write_volume_label()

void write_volume_label	(	DOS_FS *	fs,
		char *	label
	)

Definition at line 671 of file boot.c.

References DIR_ENT::adate, alloc_rootdir_entry(), DIR_ENT::attr, ATTR_VOLUME, DIR_ENT::cdate, DIR_ENT::ctime, DIR_ENT::ctime_ms, DIR_ENT::date, find_volume_de(), fs_write(), DIR_ENT::name, DIR_ENT::size, DIR_ENT::start, DIR_ENT::starthi, and DIR_ENT::time.

Referenced by check_label(), and write_label().

Variable Documentation

descr

const char* descr

Definition at line 180 of file boot.c.

Referenced by get_media_descr().

media

uint8_t media

Definition at line 179 of file boot.c.

Referenced by establish_params(), and get_media_descr().

struct { ... } mediabytes[]

Initial value:

= {
    {
    0xf0, "5.25\" or 3.5\" HD floppy"}, {
    0xf8, "hard disk"}, {
    0xf9, "3,5\" 720k floppy 2s/80tr/9sec or "
        "5.25\" 1.2M floppy 2s/80tr/15sec"}, {
    0xfa, "5.25\" 320k floppy 1s/80tr/8sec"}, {
    0xfb, "3.5\" 640k floppy 2s/80tr/8sec"}, {
    0xfc, "5.25\" 180k floppy 1s/40tr/9sec"}, {
    0xfd, "5.25\" 360k floppy 2s/40tr/9sec"}, {
    0xfe, "5.25\" 160k floppy 1s/40tr/8sec"}, {
0xff, "5.25\" 320k floppy 2s/40tr/8sec"},}

Referenced by get_media_descr().