dosread.c File Reference

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/times.h>
#include <unistd.h>

Include dependency graph for dosread.c:

Go to the source code of this file.

Data Structures
struct	dir_entry
Defines
#define	MAX_CLUSTER_SIZE   4096
#define	MAX_ROOT_ENTRIES   512
#define	FAT_START   512L
#define	ROOTADDR   (FAT_START + 2L * fat_size)
#define	clus_add(cl_no)
#define	NOT_USED   0x00
#define	ERASED   0xE5
#define	DIR   0x2E
#define	DIR_SIZE   (sizeof (struct dir_entry))
#define	SUB_DIR   0x10
#define	NIL_DIR   ((DIRECTORY *) 0)
#define	LAST_CLUSTER12   0xFFF
#define	LAST_CLUSTER   0xFFFF
#define	FREE   0x000
#define	BAD   0xFF0
#define	BAD16   0xFFF0
#define	TRUE   1
#define	FALSE   0
#define	NIL_PTR   ((char *) 0)
#define	DOS_TIME   315532800L
#define	READ   0
#define	WRITE   1
#define	FIND   3
#define	LABEL   4
#define	ENTRY   5
#define	find_entry(d, e, p)   directory(d, e, FIND, p)
#define	list_dir(d, e, f)   (void) directory(d, e, f, NIL_PTR)
#define	label()   directory(root, root_entries, LABEL, NIL_PTR)
#define	new_entry(d, e)   directory(d, e, ENTRY, NIL_PTR)
#define	is_dir(d)   ((d)->d_attribute & SUB_DIR)
#define	STD_OUT   1
#define	DRIVE_NR   (sizeof (drive) - 2)
#define	COOKED_SIZE   8192
#define	SEC_MIN   60L
#define	SEC_HOUR   (60L * SEC_MIN)
#define	SEC_DAY   (24L * SEC_HOUR)
#define	SEC_YEAR   (365L * SEC_DAY)
#define	SEC_LYEAR   (366L * SEC_DAY)
#define	HOUR   0xF800
#define	MIN   0x07E0
#define	YEAR   0xFE00
#define	MONTH   0x01E0
#define	DAY   0x01F
Typedefs
typedef dir_entry	DIRECTORY
typedef int	BOOL
Functions
	_PROTOTYPE (void usage,(char *prog_name))
	_PROTOTYPE (unsigned c2u2,(unsigned char *ucarray))
	_PROTOTYPE (unsigned long c4u4,(unsigned char *ucarray))
	_PROTOTYPE (void determine,(void))
	_PROTOTYPE (int main,(int argc, char *argv[]))
	_PROTOTYPE (DIRECTORY *directory,(DIRECTORY *dir, int entries, BOOL function, char *pathname))
	_PROTOTYPE (void extract,(DIRECTORY *entry))
	_PROTOTYPE (void make_file,(DIRECTORY *dir_ptr, int entries, char *name))
	_PROTOTYPE (char *make_name,(DIRECTORY *dir_ptr, int dir_fl))
	_PROTOTYPE (int fill,(char *buffer, size_t size))
	_PROTOTYPE (void xmodes,(int mode))
	_PROTOTYPE (void show,(DIRECTORY *dir_ptr, char *name))
	_PROTOTYPE (DIRECTORY *read_cluster,(unsigned int cluster))
	_PROTOTYPE (unsigned short free_cluster,(BOOL leave_fl))
	_PROTOTYPE (void link_fat,(unsigned int cl_1, unsigned int cl_2))
	_PROTOTYPE (unsigned short next_cluster,(unsigned int cl_no))
	_PROTOTYPE (char *slash,(char *str))
	_PROTOTYPE (void add_path,(char *file, BOOL slash_fl))
	_PROTOTYPE (void disk_io,(BOOL op, unsigned long seek, void *address, unsigned bytes))
	_PROTOTYPE (void read_fat,(unsigned int cl_no))
	_PROTOTYPE (BOOL free_range,(unsigned short *first, unsigned short *last))
	_PROTOTYPE (long lmin,(long a, long b))
void	usage (char *prog_name)
unsigned	c2u2 (unsigned char *ucarray)
unsigned long	c4u4 (unsigned char *ucarray)
void	determine ()
int	main (int argc, argv)
DIRECTORY *	directory (DIRECTORY *dir, int entries, int function, char *pathname)
void	extract (DIRECTORY *entry)
long	lmin (long a, long b)
void	make_file (DIRECTORY *dir_ptr, int entries, char *name)
void	fill_date (DIRECTORY *entry)
char *	make_name (DIRECTORY *dir_ptr, short dir_fl)
int	fill (char *buffer, size_t size)
void	xmodes (int mode)
void	show (DIRECTORY *dir_ptr, char *name)
void	free_blocks ()
DIRECTORY *	read_cluster (unsigned int cluster)
BOOL	free_range (unsigned short *first, unsigned short *last)
unsigned short	free_cluster (BOOL leave_fl)
void	read_fat (unsigned int cl_no)
void	flush_fat ()
void	link_fat (unsigned int cl_1, unsigned int cl_2)
unsigned short	next_cluster (unsigned int cl_no)
char *	slash (char *str)
void	add_path (char *file, BOOL slash_fl)
void	disk_io (BOOL op, unsigned long seek, void *address, unsigned bytes)
Variables
char *	cmnd
static int	disk
static DIRECTORY	root [MAX_ROOT_ENTRIES]
static DIRECTORY	save_entry
static char	drive [] = "/dev/dosX"
static char	null [MAX_CLUSTER_SIZE]
static char *	device = drive
static char	path [128]
static long	data_start
static long	mark
static unsigned short	total_clusters
static unsigned short	cluster_size
static unsigned short	root_entries
static unsigned short	sub_entries
static unsigned long	fat_size
static BOOL	Rflag
static BOOL	Lflag
static BOOL	Aflag
static BOOL	dos_read
static BOOL	dos_write
static BOOL	dos_dir
static BOOL	fat_16 = 0
static BOOL	big_endian
static unsigned char *	raw_fat
static unsigned short *	cooked_fat
static unsigned short	fat_low = USHRT_MAX
static unsigned short	fat_high = 0
static BOOL	fat_dirty = FALSE
static unsigned int	cache_size
unsigned short	mon_len [] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
char *	month []
static unsigned short	cl_index = 2
char	dosread_c_rcs_id []

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Define Documentation

#define BAD   0xFF0

Definition at line 60 of file dosread.c.

#define BAD16   0xFFF0

Definition at line 61 of file dosread.c. Referenced by extract(), free_blocks(), and read_fat().

#define clus_add (  cl_no   )

Value: ((long) (((long) cl_no - 2L) \ * (long) cluster_size \ + data_start \ )) Definition at line 33 of file dosread.c. Referenced by directory(), extract(), make_file(), and read_cluster().

#define COOKED_SIZE   8192

Definition at line 106 of file dosread.c. Referenced by read_fat().

#define DAY   0x01F

Definition at line 795 of file dosread.c. Referenced by show().

#define DIR   0x2E

Definition at line 52 of file dosread.c.

#define DIR_SIZE   (sizeof (struct dir_entry))

Definition at line 53 of file dosread.c. Referenced by directory().

#define DOS_TIME   315532800L

Definition at line 69 of file dosread.c. Referenced by fill_date().

#define DRIVE_NR   (sizeof (drive) - 2)

Definition at line 93 of file dosread.c.

#define ENTRY   5

Definition at line 76 of file dosread.c. Referenced by directory().

#define ERASED   0xE5

Definition at line 51 of file dosread.c. Referenced by directory().

#define FALSE   0

Definition at line 66 of file dosread.c.

#define FAT_START   512L

Definition at line 31 of file dosread.c. Referenced by determine(), flush_fat(), and read_fat().

#define FIND   3

Definition at line 74 of file dosread.c.

#define find_entry (  d, e, p   )     directory(d, e, FIND, p)

Definition at line 77 of file dosread.c.

#define FREE   0x000

Definition at line 59 of file dosread.c.

#define HOUR   0xF800

Definition at line 791 of file dosread.c. Referenced by show().

#define is_dir (  d   )     ((d)->d_attribute & SUB_DIR)

Definition at line 82 of file dosread.c. Referenced by show(), and tarfile().

#define label (   )     directory(root, root_entries, LABEL, NIL_PTR)

Definition at line 79 of file dosread.c.

#define LABEL   4

Definition at line 75 of file dosread.c.

#define LAST_CLUSTER   0xFFFF

Definition at line 58 of file dosread.c. Referenced by read_fat(), and show().

#define LAST_CLUSTER12   0xFFF

Definition at line 57 of file dosread.c. Referenced by read_fat().

#define list_dir (  d, e, f   )     (void) directory(d, e, f, NIL_PTR)

Definition at line 78 of file dosread.c. Referenced by recurse_dir().

#define MAX_CLUSTER_SIZE   4096

Definition at line 29 of file dosread.c. Referenced by determine(), extract(), and make_file().

#define MAX_ROOT_ENTRIES   512

Definition at line 30 of file dosread.c.

#define MIN   0x07E0

Definition at line 792 of file dosread.c.

#define MONTH   0x01E0

Definition at line 794 of file dosread.c. Referenced by show().

#define new_entry (  d, e   )     directory(d, e, ENTRY, NIL_PTR)

Definition at line 80 of file dosread.c. Referenced by make_file().

#define NIL_DIR   ((DIRECTORY *) 0)

Definition at line 55 of file dosread.c. Referenced by directory().

#define NIL_PTR   ((char *) 0)

Definition at line 67 of file dosread.c.

#define NOT_USED   0x00

Definition at line 50 of file dosread.c. Referenced by directory().

#define READ   0

Definition at line 71 of file dosread.c.

#define ROOTADDR   (FAT_START + 2L * fat_size)

Definition at line 32 of file dosread.c. Referenced by directory().

#define SEC_DAY   (24L * SEC_HOUR)

Definition at line 690 of file dosread.c. Referenced by days2time(), and main().

#define SEC_HOUR   (60L * SEC_MIN)

Definition at line 689 of file dosread.c.

#define SEC_LYEAR   (366L * SEC_DAY)

Definition at line 692 of file dosread.c. Referenced by fill_date().

#define SEC_MIN   60L

Definition at line 688 of file dosread.c.

#define SEC_YEAR   (365L * SEC_DAY)

Definition at line 691 of file dosread.c. Referenced by fill_date().

#define STD_OUT   1

Definition at line 84 of file dosread.c. Referenced by bad_write(), flush_buffer(), main(), open_outfile(), and panic().

#define SUB_DIR   0x10

Definition at line 54 of file dosread.c. Referenced by xmodes().

#define TRUE   1

Definition at line 65 of file dosread.c.

#define WRITE   1

Definition at line 72 of file dosread.c. Referenced by _write_pm(), do_close(), flush_fat(), make_file(), pipe_check(), put_inode(), put_super(), release(), scratch_file(), set(), test03(), test04(), test06(), test10(), test11(), test7d(), test7e(), test7f(), test7g(), test7h(), test7i(), test7j(), write(), write_standards(), and yank().

#define YEAR   0xFE00

Definition at line 793 of file dosread.c. Referenced by show().

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Typedef Documentation

typedef int BOOL

Definition at line 63 of file dosread.c.

typedef struct dir_entry DIRECTORY

Definition at line 48 of file dosread.c.

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Function Documentation

_PROTOTYPE (  long  lmin, (long a, long b)  )

_PROTOTYPE (  BOOL  free_range, (unsigned short *first, unsigned short *last)  )

_PROTOTYPE (  void  read_fat, (unsigned int cl_no)  )

_PROTOTYPE (  void  disk_io, (BOOL op, unsigned long seek, void *address, unsigned bytes)  )

_PROTOTYPE (  void  add_path, (char *file, BOOL slash_fl)  )

_PROTOTYPE (  char *  slash, (char *str)  )

_PROTOTYPE (  unsigned short  next_cluster, (unsigned int cl_no)  )

_PROTOTYPE (  void  link_fat, (unsigned int cl_1, unsigned int cl_2)  )

_PROTOTYPE (  unsigned short  free_cluster, (BOOL leave_fl)  )

_PROTOTYPE (  DIRECTORY *  read_cluster, (unsigned int cluster)  )

_PROTOTYPE (  void  show, (DIRECTORY *dir_ptr, char *name)  )

_PROTOTYPE (  void  xmodes, (int mode)  )

_PROTOTYPE (  int  fill, (char *buffer, size_t size)  )

_PROTOTYPE (  char *  make_name, (DIRECTORY *dir_ptr, int dir_fl)  )

_PROTOTYPE (  void  make_file, (DIRECTORY *dir_ptr, int entries, char *name)  )

_PROTOTYPE (  void  extract, (DIRECTORY *entry)  )

_PROTOTYPE (  DIRECTORY *  directory, (DIRECTORY *dir, int entries, BOOL function, char *pathname)  )

_PROTOTYPE (  int  main, (int argc, char *argv[])  )

_PROTOTYPE (  void  determine, (void)  )

_PROTOTYPE (  unsigned long  c4u4, (unsigned char *ucarray)  )

_PROTOTYPE (  unsigned  c2u2, (unsigned char *ucarray)  )

_PROTOTYPE (  void  usage, (char *prog_name)  )

void add_path (  char *  file, BOOL  slash_fl )

Definition at line 1074 of file dosread.c. References NIL_PTR, path, ptr, and strcpy(). Referenced by add_file().

unsigned c2u2 (  unsigned char *  ucarray  )

Definition at line 157 of file dosread.c. Referenced by determine().

unsigned long c4u4 (  unsigned char *  ucarray  )

Definition at line 163 of file dosread.c. References long(). Referenced by determine().

void determine (   )

Definition at line 171 of file dosread.c. References big_endian, boot, c2u2(), c4u4(), cluster_size, cmnd, data_start, disk, disk_io(), dos_write, exit(), fat_16, fat_size, FAT_START, fprintf(), hard(), heads, L, MAX_CLUSTER_SIZE, OK, READ, root_entries, stderr, sub_entries, and total_clusters.

DIRECTORY* directory (  DIRECTORY *  dir, int  entries, int  function, char *  pathname )

Definition at line 441 of file dosread.c. References clus_add, dir_entry::d_name, DIR_SIZE, ENTRY, ERASED, file_name, FIND, i, if(), j, mark, mem, next_cluster(), NIL_DIR, NOT_USED, read_cluster(), root_entries, ROOTADDR, and type. Referenced by compare(), and dump_dir().

void disk_io (  BOOL  op, unsigned long  seek, void *  address, unsigned  bytes )

Definition at line 1094 of file dosread.c. References cmnd, disk, errno, exit(), fflush(), fprintf(), L, lseek, r, read, READ, SEEK_SET, stderr, stdout, strerror(), and write. Referenced by determine(), extract(), flush_fat(), make_file(), read_cluster(), and read_fat().

void extract (  DIRECTORY *  entry  )

Definition at line 567 of file dosread.c. References Aflag, BAD16, clus_add, cluster_size, cmnd, dir_entry::d_cluster, disk_io(), errno, exit(), ferror, fflush(), fprintf(), fwrite(), i, if(), long(), MAX_CLUSTER_SIZE, next_cluster(), putchar, READ, stderr, stdout, and strerror().

int fill (  char *  buffer, size_t  size )

Definition at line 763 of file dosread.c. References Aflag, begin, BOOL, c, EOF, FALSE, getchar, and TRUE. Referenced by command(), inflate_table(), inflate_table9(), and make_file().

void fill_date (  DIRECTORY *  entry  )

Definition at line 696 of file dosread.c. References day, DOS_TIME, i, month, SEC_LYEAR, SEC_YEAR, seconds, time, and tmp.

void flush_fat (   )

Definition at line 1002 of file dosread.c. References big_endian, cache_size, cooked_fat, cp, disk_io(), fat_16, fat_low, fat_size, FAT_START, i, and WRITE. Referenced by link_fat(), and next_cluster().

void free_blocks (   )

Definition at line 840 of file dosread.c. References BAD16, FREE, next_cluster(), and total_clusters.

unsigned short free_cluster (  BOOL  leave_fl  )

Definition at line 905 of file dosread.c. References cmnd, exit(), fprintf(), FREE, next_cluster(), stderr, and total_clusters.

BOOL free_range (  unsigned short *  first, unsigned short *  last )

Definition at line 882 of file dosread.c. References FALSE, FREE, next_cluster(), total_clusters, and TRUE.

void link_fat (  unsigned int  cl_1, unsigned int  cl_2 )

Definition at line 1040 of file dosread.c. References cooked_fat, fat_dirty, fat_high, fat_low, flush_fat(), read_fat(), and TRUE.

long lmin (  long  a, long  b )

Definition at line 617 of file dosread.c. Referenced by make_file().

int main (  int  argc, argv  )

Definition at line 295 of file dosread.c. References cmnd, dev_nr, dos_dir, dos_read, dos_write, exit(), fprintf(), Lflag, Rflag, slash(), stderr, strcmp, TRUE, and usage.

void make_file (  DIRECTORY *  dir_ptr, int  entries, char *  name )

Definition at line 625 of file dosread.c. References chunk, clus_add, cluster_size, disk_io(), done, entry, fill(), i, L, lmin(), MAX_CLUSTER_SIZE, memset(), new_entry, ptr, r, size, and WRITE.

char* make_name (  DIRECTORY *  dir_ptr, short  dir_fl )

Definition at line 736 of file dosread.c. References assert, i, and ptr.

unsigned short next_cluster (  unsigned int  cl_no  )

Definition at line 1053 of file dosread.c. References cooked_fat, fat_dirty, fat_high, fat_low, flush_fat(), and read_fat(). Referenced by directory(), extract(), free_blocks(), free_cluster(), free_range(), and show().

DIRECTORY* read_cluster (  unsigned int  cluster  )

Definition at line 859 of file dosread.c. References clus_add, cluster_size, cmnd, disk_io(), exit(), fprintf(), malloc(), NULL, READ, and stderr. Referenced by directory().

void read_fat (  unsigned int  cl_no  )

Definition at line 921 of file dosread.c. References BAD, BAD16, cache_size, cmnd, cooked_fat, COOKED_SIZE, cp, disk_io(), exit(), fat_16, fat_high, fat_low, fat_size, FAT_START, fprintf(), i, LAST_CLUSTER, LAST_CLUSTER12, malloc(), NULL, raw_fat, READ, stderr, and total_clusters. Referenced by link_fat(), and next_cluster().

void show (  DIRECTORY *  dir_ptr, char *  name )

Definition at line 810 of file dosread.c. References cluster_size, dir_entry::d_date, DAY, HOUR, i, is_dir, LAST_CLUSTER, Lflag, MIN, MONTH, next, next_cluster(), printf, strlen(), xmodes(), and YEAR.

char* slash (  char *  str  )

Definition at line 1063 of file dosread.c. References result. Referenced by cidr_aton(), enterDirectory(), main(), mkpath(), netspec(), parse_cidr(), path_add(), read_file(), and recover().

void usage (  char *  prog_name  )

Definition at line 149 of file dosread.c. References dos_dir, exit(), fprintf(), and stderr.

void xmodes (  int  mode  )

Definition at line 802 of file dosread.c. References printf, and SUB_DIR. Referenced by show().

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Variable Documentation

BOOL Aflag [static]

Definition at line 100 of file dosread.c. Referenced by extract(), and fill().

BOOL big_endian [static]

Definition at line 101 of file dosread.c. Referenced by determine(), and flush_fat().

unsigned int cache_size [static]

Definition at line 118 of file dosread.c.

unsigned short cl_index = 2 [static]

Definition at line 873 of file dosread.c.

unsigned short cluster_size [static]

Definition at line 97 of file dosread.c. Referenced by calc_fat_size(), determine(), extract(), make_file(), read_cluster(), and show().

char* cmnd

Definition at line 86 of file dosread.c. Referenced by determine(), disk_io(), extract(), free_cluster(), main(), read_cluster(), read_fat(), and usage().

unsigned short* cooked_fat [static]

Definition at line 112 of file dosread.c. Referenced by flush_fat(), link_fat(), next_cluster(), and read_fat().

long data_start [static]

Definition at line 95 of file dosread.c. Referenced by determine().

char * device = drive [static]

Definition at line 94 of file dosread.c.

int disk [static]

Definition at line 88 of file dosread.c. Referenced by determine(), disk_io(), do_autopart(), extpartition(), and partition().

BOOL dos_dir [static]

Definition at line 100 of file dosread.c. Referenced by main(), and usage().

BOOL dos_read [static]

Definition at line 100 of file dosread.c. Referenced by main().

BOOL dos_write [static]

Definition at line 100 of file dosread.c. Referenced by determine(), dos_to_dos(), main(), and unix_to_dos().

char dosread_c_rcs_id[]

Initial value: "$Id: dosread.c,v 1.2 2005/07/13 10:02:14 beng Exp $" Definition at line 1119 of file dosread.c.

char drive[] = "/dev/dosX" [static]

Definition at line 92 of file dosread.c. Referenced by ack_irqs(), common_dos_loop(), enterDirectory(), finish_drive_clause(), get_drive(), init_params(), init_params_pci(), main(), mcat(), mformat(), minfo(), mlabel(), mmove(), mpartition(), mtoolstest(), name2dev(), syntax(), and w_init().

BOOL fat_16 = 0 [static]

Definition at line 100 of file dosread.c. Referenced by determine(), flush_fat(), and read_fat().

BOOL fat_dirty = FALSE [static]

Definition at line 117 of file dosread.c. Referenced by link_fat(), and next_cluster().

unsigned short fat_high = 0 [static]

Definition at line 116 of file dosread.c. Referenced by link_fat(), next_cluster(), and read_fat().

unsigned short fat_low = USHRT_MAX [static]

Definition at line 115 of file dosread.c. Referenced by flush_fat(), link_fat(), next_cluster(), and read_fat().

unsigned long fat_size [static]

Definition at line 98 of file dosread.c. Referenced by determine(), flush_fat(), and read_fat().

BOOL Lflag [static]

Definition at line 100 of file dosread.c. Referenced by cpio_options(), ftree_start(), main(), pax_options(), show(), and tar_options().

long mark [static]

Definition at line 96 of file dosread.c.

unsigned short mon_len[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}

Definition at line 694 of file dosread.c.

char* month[]

Initial value: { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" } Definition at line 797 of file dosread.c.

char null[MAX_CLUSTER_SIZE] [static]

Definition at line 94 of file dosread.c.

char path[128] [static]

Definition at line 94 of file dosread.c. Referenced by add_path(), addpath(), apply_differences(), cdcmd(), cleandir(), compare(), decode_message(), delete(), delpath(), do_change(), do_chown(), DOcd(), doDELE(), dodot(), DOlcd(), DOlist(), DOlmkdir(), DOlrmdir(), doMKD(), DOmkdir(), DOnlst(), doRMD(), DOrmdir(), doRNTO(), enter(), execute(), execvp(), find_command(), get_drive(), getattributes(), gettynames(), islink(), linked(), listdir(), listfiles(), lock(), lockpath(), main(), mtoolstest(), path_name(), print1(), printentry(), rdlink(), readstate(), recvfile(), rexecve(), sendfile(), slave(), traverse(), and ttyname().

unsigned char* raw_fat [static]

Definition at line 109 of file dosread.c. Referenced by read_fat().

BOOL Rflag [static]

Definition at line 100 of file dosread.c. Referenced by main().

DIRECTORY root[MAX_ROOT_ENTRIES] [static]

Definition at line 90 of file dosread.c. Referenced by dovhost(), fts_open(), inflate_table(), inflate_table9(), main(), makepathtables(), snocString(), traversetree(), and writedata().

unsigned short root_entries [static]

Definition at line 97 of file dosread.c. Referenced by determine(), and directory().

DIRECTORY save_entry [static]

Definition at line 91 of file dosread.c.

unsigned short sub_entries [static]

Definition at line 97 of file dosread.c. Referenced by determine().

unsigned short total_clusters [static]

Definition at line 97 of file dosread.c. Referenced by determine(), free_blocks(), free_cluster(), free_range(), and read_fat().

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