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omi.c
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/*
* omi.c: Create an image of a CD or DVD (Optical Media Image).
*
* Jason Hood, 16 & 18 March, 5 & 8 May, 2005.
*
* A program to create a disk image from the contents of a CD/DVD. Since DOS
* is practically limited to 2Gi files and DVDs can be more than that, use
* multiple files, each of 512Mi. In addition, to simplify the driver code,
* and since reads are limited to 62Ki, duplicate the first 60Ki of the next
* file to this file.
*
* Usage is simple: specify the drive letter of the CD (if you have more than
* one) and the name of the image (which will default to the label with an
* extension of ".ISO" for CD and ".I" for DVD).
*
* Parts of this program are taken directly from CDCACHER.C by John McCoy.
*
* v1.01, 6 & 10 June, 2005:
* Win32 port (image on NTFS is a single file);
* use creation date if there is no modification date;
* always use KiB for free space message (MiB might be too close to notice).
*/
#define PVERS "1.01"
#define PDATE "10 June, 2005"
#include <stdlib.h>
#include <stdio.h>
#include <io.h>
#include <conio.h>
#include <time.h>
#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# ifdef __MINGW32__
# include <tcconio.h>
# endif
# define far
# define farmalloc malloc
# define _fmemcmp memcmp
# define _fstrncpy strncpy
# define setftime( h, t ) SetFileTime( h, NULL, NULL, t )
#else
# include <fcntl.h>
# include <sys/stat.h>
# include <alloc.h>
# include <dos.h>
# include <string.h>
typedef unsigned char BYTE;
typedef unsigned int WORD;
typedef unsigned long DWORD;
typedef unsigned int UINT;
#endif
#define PriVolDescSector 16
#define ISO_ID "CD001"
#define HSF_ID "CDROM"
#define CD_ISO 'I'
#define CD_HSF 'H'
#define CD_Unknown 'U'
#define IMG_SIZE 262144L
#define IMG_SHIFT 18
#define OCTETS(from,to) (to - from + 1)
struct ISO_CD
{
BYTE Fill [OCTETS( 1, 1 )];
char cdID [OCTETS( 2, 6 )];
BYTE Fill2 [OCTETS( 7, 40 )];
char volLabel[OCTETS( 41, 72 )];
BYTE Fill3 [OCTETS( 73, 80 )];
DWORD volSize;
BYTE Fill4 [OCTETS( 85, 813 )];
char cr8Date [OCTETS( 814, 830 )];
char modDate [OCTETS( 831, 847 )];
BYTE Fill5 [OCTETS( 848, 2048 )];
} far* iso;
struct HSF_CD
{
BYTE Fill [OCTETS( 1, 9 )];
char cdID [OCTETS( 10, 14 )];
BYTE Fill2 [OCTETS( 15, 48 )];
char volLabel[OCTETS( 49, 80 )];
BYTE Fill3 [OCTETS( 81, 88 )];
DWORD volSize;
BYTE Fill4 [OCTETS( 93, 790 )];
char cr8Date [OCTETS( 791, 806 )];
char modDate [OCTETS( 807, 822 )];
BYTE Fill5 [OCTETS( 823, 2048 )];
} far* hsf;
void CreateCacheName( void );
int Image( DWORD start );
void CheckFreeSpace( DWORD volSize );
void GetFTime( void );
int CDReadLong( UINT SectorCount, DWORD StartSector );
void ReadPVD( void );
void progress( DWORD cur, DWORD max );
int Abort( const char* msg1, const char* msg2 );
char* thoufmt( DWORD num );
void get_country_info( void );
char far* dta;
char CDfmt = CD_Unknown;
int CD = -1; // Drive number of the CD/DVD (A: = 0)
int DVD = 0; // 1 for a DVD (>= 2GiB and not NTFS)
char CacheName[260];
char* img_char;
DWORD sectors;
char decisep = '.', thousep = ',', timesep = ':';
char prochar[2][4] = { "°±²Û", "-+*#" };
int ascii = 0;
#ifdef _WIN32
FILETIME ft;
HANDLE fdin;
#define MAX 32
#define FIVESECS 5000 // CLOCKS_PER_SEC == 1000
#else
struct ftime ft;
#define MAX 30u
#define FIVESECS 91 // CLOCKS_PER_SEC == 18.2 (Borland)
#endif
enum
{
E_OK, // No problems
E_MEM, // Not enough memory
E_NOCD, // Not a CD drive, MSCDEX/SHSUCDX not installed,
// unknown CD format or no CD present
E_EXISTS, // Image file already exists
E_CREATE, // Unable to create image file or not enough free space
E_ABORTED // User aborted (with read/write error)
};
int main( int argc, char** argv )
{
#ifndef _WIN32
union REGS regs;
#endif
int j, len;
char* dot;
DWORD s;
int rc = E_OK;
if (argc > 1)
{
if (argv[1][0] == '?' || argv[1][1] == '?' || !strcmp( argv[1], "--help" ))
{
puts(
"Optical Media Image by Jason Hood <[email protected]>.\n"
"Version "PVERS" ("PDATE"). Freeware.\n"
"http://shsucdx.adoxa.vze.com/\n"
"\n"
"Create an image of a CD- or DVD-ROM.\n"
"\n"
"omi [Drive] [Image] [Sectors] [-s] [-a]\n"
"\n"
"Drive: drive letter containing disc (default is first CD/DVD)\n"
"Image: name of image (default is label + \".ISO\" [CD] or \".I\" [DVD])\n"
"Sectors: number of sectors to image (default is entire disc)\n"
"-s: split the image, even if it would fit as one file\n"
"-a: use an ASCII progress bar"
);
return E_OK;
}
for (j = 1; j < argc; ++j)
{
if (argv[j][1] == '\0' || (argv[j][1] == ':' && argv[j][2] == '\0'))
{
CD = (argv[j][0] | 0x20) - 'a';
}
else if (argv[j][0] == '-' || argv[j][0] == '/')
{
char o = argv[j][1] | 0x20;
if (o == 's')
DVD = 1;
else if (o == 'a')
ascii = !ascii;
else
strcpy( CacheName, argv[j] );
}
else
{
s = strtoul( argv[j], &dot, 0 );
if (*dot == '\0')
sectors = s;
else
strcpy( CacheName, argv[j] );
}
}
}
dta = farmalloc( MAX << 11 ); // transfer up to MAX blocks at a time
if (dta == NULL)
{
fputs( "ERROR: Not enough memory.\n", stderr );
return E_MEM;
}
#ifdef _WIN32
if (CD == -1)
{
len = GetLogicalDriveStrings( 2048, dta );
for (dot = dta; len; dot += 4, len -= 4)
{
if (GetDriveType( dot ) == DRIVE_CDROM)
{
CD = *dot - 'A';
break;
}
}
if (CD == -1)
{
fputs( "ERROR: No CD-ROM drives assigned.\n", stderr );
return E_NOCD;
}
}
else
{
dta[0] = CD + 'A';
dta[1] = ':';
dta[2] = '/';
dta[3] = '\0';
if (GetDriveType( dta ) != DRIVE_CDROM)
{
fprintf( stderr, "ERROR: %c: is not a CD-ROM drive.\n", *dta );
return E_NOCD;
}
}
sprintf( dta, "//./%c:", CD + 'A' );
fdin = CreateFile( dta, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if (fdin == INVALID_HANDLE_VALUE)
{
fprintf( stderr, "ERROR: Cannot open %s.\n", dta );
return E_NOCD;
}
#else
if (CD == -1)
{
regs.x.ax = 0x1500;
regs.x.bx = 0;
int86( 0x2f, ®s, ®s );
CD = regs.x.cx;
}
else
{
regs.x.ax = 0x150B;
regs.x.cx = CD;
int86( 0x2f, ®s, ®s );
if (regs.x.bx != 0xADAD)
regs.x.bx = 0;
else if (regs.x.ax == 0)
{
fprintf( stderr, "ERROR: %c: is not a CD-ROM drive.\n", CD + 'A' );
return E_NOCD;
}
}
if (regs.x.bx == 0)
{
fputs( "ERROR: No CD-ROM drives assigned.\n", stderr );
return E_NOCD;
}
#endif
iso = (struct ISO_CD far*)dta;
hsf = (struct HSF_CD far*)dta;
ReadPVD();
if (CDfmt == CD_Unknown)
{
fputs( "ERROR: Unknown CD/DVD format or drive not ready.\n", stderr );
return E_NOCD;
}
if (!sectors)
sectors = (CDfmt == CD_ISO) ? iso->volSize : hsf->volSize;
if (!DVD)
{
#ifdef _WIN32
char buf[8];
if (*CacheName && CacheName[1] == ':')
{
buf[0] = *CacheName;
buf[1] = ':';
buf[2] = '/';
buf[3] = '\0';
dot = buf;
}
else
{
*buf = '\0';
dot = NULL;
}
GetVolumeInformation( dot, NULL, 0, NULL, NULL, NULL, buf, sizeof(buf) );
if (strcmp( buf, "NTFS" ) != 0)
#endif
DVD = (sectors >= 1048576uL);
}
if (!*CacheName)
CreateCacheName();
if (DVD)
{
#ifdef _WIN32
img_char = strchr( CacheName, '\0' );
img_char[1] = '\0';
#else
dot = img_char = (CacheName[1] == ':') ? CacheName+2 : CacheName;
for (j = 0; CacheName[j]; ++j)
{
if (CacheName[j] == '/' || CacheName[j] == '\\')
img_char = CacheName + j + 1;
else if (CacheName[j] == '.')
dot = CacheName + j + 1;
}
if (dot > img_char)
{
img_char = dot;
len = 3;
}
else
len = 8;
j = strlen( img_char );
if (j >= len)
img_char += len - 1;
else
{
img_char += j;
img_char[1] = '\0';
}
#endif
}
CheckFreeSpace( sectors );
GetFTime();
if (DVD)
{
for (*img_char = 'A', s = 0; s < sectors; ++*img_char, s += IMG_SIZE)
{
rc = Image( s );
if (rc != E_OK)
break;
}
}
else
rc = Image( 0 );
return rc;
}
int Image( DWORD start )
{
DWORD i, n, volSize;
int rc;
char action;
#ifdef _WIN32
HANDLE handle;
DWORD w;
#define write_cd( h, b, n, w ) WriteFile( h, b, n << 11, &w, NULL )
#define back_up( h, w ) SetFilePointer( h, -(LONG)w, NULL, FILE_CURRENT )
#define close_cd( h ) CloseHandle( h )
#else
int handle;
WORD w;
#define write_cd( h, b, n, w ) _dos_write( h, b, (WORD)n << 11, (WORD*)&w );
#define back_up( h, w ) lseek( h, -(long)w, SEEK_CUR )
#define close_cd( h ) close( h )
#endif
if (access( CacheName, 0 ) == 0)
{
printf( "\"%s\" already exists.\n"
"Press 'O' to overwrite, 'R' to resume, anything else to exit.\n",
CacheName );
action = getch() | 0x20;
if (action != 'o' && action != 'r')
return E_EXISTS;
}
else
action = 0;
#ifdef _WIN32
handle = CreateFile( CacheName, GENERIC_WRITE, 0, NULL,
(action == 'o') ? CREATE_ALWAYS : OPEN_ALWAYS, 0, NULL );
if (handle == INVALID_HANDLE_VALUE)
#else
rc = O_BINARY | O_CREAT | O_WRONLY;
if (action == 'o')
rc |= O_TRUNC;
handle = open( CacheName, rc, S_IWRITE );
if (handle == -1)
#endif
{
fprintf( stderr, "ERROR: \"%s\" could not be created.\n", CacheName );
return E_CREATE;
}
if (DVD)
{
volSize = IMG_SIZE + 30;
if (start + volSize > sectors)
volSize = sectors - start;
}
else
volSize = sectors;
if (action)
{
gotoxy( 1, wherey() - 1 );
clreol();
gotoxy( 1, wherey() - 1 );
clreol();
}
#if !defined( _WIN32 )
printf( "Writing \"%s\"; size: %s.\n", CacheName, thoufmt( volSize << 11 ) );
#elif defined( __LCC__ )
printf( "Writing \"%s\"; size: %'I64d.\n", CacheName, (INT64)volSize << 11 );
#else
printf( "Writing \"%s\"; size: ", CacheName );
if (volSize < 2097152) puts( thoufmt( volSize << 11 ) );
else
{
__int64 sz = (__int64)volSize << 11;
printf( "%s,", thoufmt( (DWORD)(sz / 1000000) ) );
puts( thoufmt( (DWORD)(sz % 1000000) ) );
}
#endif
_setcursortype( _NOCURSOR );
rc = E_OK;
if (action == 'r')
{
// Back up a bit, since there may have been a write error.
#ifdef _WIN32
LARGE_INTEGER fs;
fs.LowPart = GetFileSize( handle, (PULONG)&fs.HighPart );
i = (DWORD)(fs.QuadPart >> 11);
i = (i <= MAX) ? 0 : i - MAX;
fs.QuadPart = (LONGLONG)i << 11;
SetFilePointer( handle, fs.LowPart, &fs.HighPart, FILE_BEGIN );
#else
i = filelength( handle ) >> 11;
i = (i <= MAX) ? 0 : i - MAX;
lseek( handle, i << 11, SEEK_SET );
#endif
}
else
i = 0;
progress( ~0, volSize );
while (i < volSize)
{
progress( i, volSize );
n = volSize - i;
if (n > MAX)
n = MAX;
while (!CDReadLong( (UINT)n, start + i ))
{
if (Abort( "Read error", "try again" ))
goto aborted;
}
for (;;)
{
write_cd( handle, dta, n, w );
if (w == ((UINT)n << 11))
break;
if (Abort( "Write error", "try again" ))
goto aborted;
back_up( handle, w );
}
if (kbhit())
{
if (Abort( "Paused", "continue" ))
goto aborted;
}
i += n;
}
if (rc == E_OK)
{
putch( '\r' );
clreol();
setftime( handle, &ft );
}
else
{
aborted:
rc = E_ABORTED;
cputs( "\r\n" );
}
_setcursortype( _NORMALCURSOR );
close_cd( handle );
return rc;
}
void progress( DWORD cur, DWORD max )
{
static int old_pc;
static int len;
int pc;
static clock_t begin_time, total_time, rate_time;
static UINT old_time;
static DWORD rate_val;
clock_t elapsed;
if (cur == ~0)
{
char* p;
len = strlen( p = thoufmt( max ) );
cprintf( " 0%c0%% [..................................................] %s"
, decisep, p );
rate_time = begin_time = clock();
rate_val = 0;
old_pc = 0;
return;
}
if (rate_val == 0)
rate_val = cur;
// This is number of sectors, so there's no problem with overflow.
pc = (int)(1000 * cur / max);
cprintf( "\r%3d%c%d", pc / 10, decisep, pc % 10 );
pc /= 5;
gotoxy( 9 + (old_pc >> 2), wherey() );
while ((old_pc >> 2) < (pc >> 2))
{
putch( prochar[ascii][3] );
old_pc += 4;
}
if (pc & 3)
putch( prochar[ascii][(pc & 3) - 1] );
gotoxy( 61, wherey() );
cprintf( "%*s", len, thoufmt( max - cur ) );
elapsed = clock() - begin_time;
if (elapsed >= FIVESECS)
{
if (elapsed - rate_time >= FIVESECS)
{
total_time = elapsed + (max - cur) * (elapsed - rate_time)
/ (cur - rate_val);
rate_time = elapsed;
rate_val = cur;
}
elapsed = (elapsed >= total_time) ? 0 : (total_time - elapsed) * 5/FIVESECS;
if ((UINT)elapsed != old_time)
{
gotoxy( 63 + len, wherey() );
cprintf( "%2d%c%02d", (UINT)elapsed / 60, timesep, (UINT)elapsed % 60 );
old_time = (UINT)elapsed;
}
}
}
int Abort( const char* msg1, const char* msg2 )
{
int rc;
cprintf( "\r\n%s: press ESC to abort, anything else to %s.", msg1, msg2 );
while (kbhit()) getch();
rc = getch();
if (kbhit()) getch(); // skip second key of function keys
if (rc != 27)
{
putch( '\r' );
clreol();
gotoxy( 1, wherey() - 1 );
}
return (rc == 27);
}
int CDReadLong( UINT SectorCount, DWORD StartSector )
{
#ifdef _WIN32
static LARGE_INTEGER pos;
LARGE_INTEGER ofs;
DWORD len;
// Let's try and avoid unnecessary seeking.
ofs.QuadPart = (LONGLONG)StartSector << 11;
if (ofs.QuadPart != pos.QuadPart)
SetFilePointer( fdin, ofs.LowPart, &ofs.HighPart, FILE_BEGIN );
ReadFile( fdin, dta, SectorCount << 11, &len, NULL );
pos.QuadPart += len;
return (len == (SectorCount << 11));
#else
struct REGPACK regs;
regs.r_ax = 0x1508;
regs.r_es = FP_SEG( dta );
regs.r_bx = FP_OFF( dta );
regs.r_cx = CD;
regs.r_si = (WORD)(StartSector >> 16);
regs.r_di = (WORD)StartSector;
regs.r_dx = SectorCount;
intr( 0x2f, ®s );
return !(regs.r_flags & 1); // carry flag set if error
#endif
}
void ReadPVD( void )
{
if (CDReadLong( 1, PriVolDescSector ))
{
if (_fmemcmp( iso->cdID, ISO_ID, sizeof(iso->cdID) ) == 0)
CDfmt = CD_ISO;
else if (_fmemcmp( hsf->cdID, HSF_ID, sizeof(hsf->cdID) ) == 0)
CDfmt = CD_HSF;
}
}
void CheckFreeSpace( DWORD volSize )
{
DWORD cluster, free;
#ifdef _WIN32
DWORD bps, spc;
char drv_str[MAX_PATH];
WIN32_FIND_DATA find;
HANDLE hfind;
#else
int drv;
char drv_str[4];
struct diskfree_t df;
struct
{
WORD size;
WORD ver;
DWORD sectors_per_cluster;
DWORD bytes_per_sector;
DWORD avail_clusters;
DWORD total_clusters;
DWORD avail_physical_sectors;
DWORD total_physical_sectors;
DWORD avail_units;
DWORD total_units;
BYTE reserved[8];
} edf;
union REGS regs;
struct find_t find;
#endif
#ifdef _WIN32
if (CacheName[1] == ':')
{
drv_str[0] = *CacheName & 0xdf;
drv_str[1] = ':';
drv_str[2] = '/';
}
else
{
GetCurrentDirectory( sizeof(drv_str), drv_str );
}
drv_str[3] = '\0';
GetDiskFreeSpace( drv_str, &spc, &bps, &free, NULL );
cluster = spc * bps;
#else
if (CacheName[1] == ':')
drv = (*CacheName | 0x20) - 'a' + 1;
else
_dos_getdrive( (WORD*)&drv );
drv_str[0] = drv + 'A' - 1;
drv_str[1] = ':';
drv_str[2] = '\\';
drv_str[3] = '\0';
regs.x.ax = 0x7303;
regs.x.cx = sizeof(edf);
regs.x.di = (WORD)&edf;
regs.x.dx = (WORD)drv_str;
_ES = _DS;
intdos( ®s, ®s );
if (regs.x.cflag)
{
if (_dos_getdiskfree( drv, &df ))
{
fprintf( stderr, "ERROR: %c: is an invalid drive.\n", *drv_str );
exit( E_CREATE );
}
cluster = df.sectors_per_cluster * df.bytes_per_sector;
free = df.avail_clusters;
}
else
{
cluster = edf.sectors_per_cluster * edf.bytes_per_sector;
free = edf.avail_clusters;
}
#endif
if (DVD)
{
*img_char = '?'; // May find more than intended, but never mind
free -= ((sectors >> IMG_SHIFT) * 30*2048 + cluster-1) / cluster;
}
#ifdef _WIN32
hfind = FindFirstFile( CacheName, &find );
if (hfind != INVALID_HANDLE_VALUE)
{
do
{
LONGLONG size = ((LONGLONG)find.nFileSizeHigh << 32)
+ find.nFileSizeLow;
free += (DWORD)((size + cluster-1) / cluster);
} while (FindNextFile( hfind, &find ));
FindClose( hfind );
}
#else
drv = _dos_findfirst( CacheName, FA_HIDDEN | FA_SYSTEM, &find );
while (drv == 0)
{
free += (find.size + cluster-1) / cluster;
drv = _dos_findnext( &find );
}
#endif
// Normalise cluster size to 2Ki.
if (cluster < 2048)
{
free >>= (cluster == 512) ? 2 : 1;
}
else if (cluster > 2048)
{
cluster >>= 12;
do
{
if ((long)free < 0)
{
free = volSize;
break;
}
free <<= 1;
} while ((cluster >>= 1) != 0);
}
if (free < volSize)
{
fprintf( stderr, "Not enough free space on %c: (%sKiB required, ",
*drv_str, thoufmt( volSize << 1 ) );
fprintf( stderr, "%sKiB available).\n", thoufmt( free << 1 ) );
exit( E_CREATE );
}
}
void CreateCacheName( void )
{
char far* label;
char* name = CacheName;
int j;
label = (CDfmt == CD_ISO) ? iso->volLabel : hsf->volLabel;
#ifdef _WIN32
j = 32;
#else
j = 8;
#endif
for (; j > 0; --j)
{
if (*label == ' ')
break;
*name++ = *label++;
}
if (name == CacheName)
{
if (DVD)
{
*name++ = 'D';
*name++ = 'V';
*name++ = 'D';
}
else
{
*name++ = 'C';
*name++ = 'D';
}
}
strcpy( name, (DVD) ? ".I" : ".ISO" );
}
void GetFTime( void )
{
char far* mod = (CDfmt == CD_ISO) ? iso->modDate : hsf->modDate;
char buf[16];
int year, month, day, hour, min, sec;
#ifdef _WIN32
SYSTEMTIME t;
#endif
_fstrncpy( buf, mod, 14 );
sscanf( buf, "%4d%2d%2d%2d%2d%2d", &year, &month, &day,
&hour, &min, &sec );
if (year == 0)
{
mod = (CDfmt == CD_ISO) ? iso->cr8Date : hsf->cr8Date;
_fstrncpy( buf, mod, 14 );
sscanf( buf, "%4d%2d%2d%2d%2d%2d", &year, &month, &day,
&hour, &min, &sec );
}
#ifdef _WIN32
t.wYear = year;
t.wMonth = month;
t.wDay = day;
t.wHour = hour;
t.wMinute = min;
t.wSecond = sec;
t.wMilliseconds = 0;
SystemTimeToFileTime( &t, &ft );
#else
ft.ft_year = year - 1980;
ft.ft_month = month;
ft.ft_day = day;
ft.ft_hour = hour;
ft.ft_min = min;
ft.ft_tsec = sec >> 1;
#endif
}
char* thoufmt( DWORD num )
{
static char buf[16];
#ifdef __LCC__
sprintf( buf, "%'lu", num );
return buf;
#else
char* pos;
int th;
pos = buf + 15;
th = 0;
do
{
if (++th == 4)
{
*--pos = thousep;
th = 0;
}
else
{
*--pos = (num % 10) + '0';
num /= 10;
}
} while (num);
return pos;
#endif
}
void get_country_info( void )
{
#ifdef _WIN32
char sep;
if (GetLocaleInfo( LOCALE_USER_DEFAULT, LOCALE_SDECIMAL, &sep, 1 ))
decisep = sep;
if (GetLocaleInfo( LOCALE_USER_DEFAULT, LOCALE_STHOUSAND, &sep, 1 ))
thousep = sep;
if (GetLocaleInfo( LOCALE_USER_DEFAULT, LOCALE_STIME, &sep, 1 ))
timesep = sep;
#else
struct COUNTRY c;
if (country( 0, &c ))
{
decisep = c.co_desep[0];
thousep = c.co_thsep[0];
timesep = c.co_tmsep[0];
}
#endif
}