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<pre wrap="">Ok, diky. Zkusim to nejak rozbehat.
LP.
------------------------------
Posilam par odkazu a fragmentu kodu ktery urcite po par upravach i
zkompilujete, snad to pomuze.
Abyste si neprepsal disk ktery nechcete prepsat, je vhodne napr. pri
otevreni zkontrolovat velikost
oteviraneho disku a zakazat pristup na "velke disky", nebo zkontrolovat zda
jsou na nejakem sektoru,
nebo sektorech zapsana urcita identifikacni data, ktera si zvolite.
#include "stdafx.h"
#include "AlarmRead.h"
#include "AlarmReadDlg.h"
#include "winioctl.h"
#include <stdlib.h>
#include <io.h>
#include "stdafx.h"
#include "windows.h"
#include <direct.h>
unsigned char read_sd (unsigned char *buf, unsigned long sector) {
DWORD res;
res = SetFilePointer(
dh, // handle of file
sector*512, // number of bytes to move file pointer
NULL, // pointer to high-order DWORD of distance to move
FILE_BEGIN // how to move
);
if ((res==0xFFFFFFFF)||(res!=sector*512))
return (0);
if (!ReadFile(
dh, // handle of file to read
buf, // pointer to buffer that receives data
512, // number of bytes to read
&res, // pointer to number of bytes read
NULL // pointer to structure for data
))
return (0);
if (res!=512) return (0);
return (1);
}
unsigned char read_block_sd (unsigned char *buf, unsigned long sector,
unsigned long size)
{
DWORD res;
res = SetFilePointer(
dh, // handle of file
sector*512, // number of bytes to move file pointer
NULL, // pointer to high-order DWORD of distance to move
FILE_BEGIN // how to move
);
if ((res==0xFFFFFFFF)||(res!=sector*512))
return (0);
if (!ReadFile(
dh, // handle of file to read
buf, // pointer to buffer that receives data
(size+1)*512, // number of bytes to read
&res, // pointer to number of bytes read
NULL // pointer to structure for data
))
return (0);
if (res!=(size+1)*512) return (0);
return (1);
}
unsigned char write_sd (unsigned char *buf, unsigned long sector, unsigned
long size) {
DWORD res;
res = SetFilePointer(
dh, // handle of file
sector*512, // number of bytes to move file pointer
NULL, // pointer to high-order DWORD of distance to move
FILE_BEGIN // how to move
);
if ((res==0xFFFFFFFF)||(res!=sector*512))
return (0);
if (!WriteFile(
dh, // handle of file to write
buf, // pointer to buffer that receives data
size*512, // number of bytes to write
&res, // pointer to number of bytes writed
NULL // pointer to structure for data
))
return (0);
if (res!=size*512) return (0);
return (1);
}
bool get_drive_size (unsigned long *ds) {
DISK_GEOMETRY dg;
DWORD br;
if (!DeviceIoControl(
dh, // handle to device of interest
IOCTL_DISK_GET_DRIVE_GEOMETRY, // dwIoControlCode, control code of
operation to perform
NULL, // lpInBuffer is not used; must be NULL
0, // nInBufferSize is not used; must be zero
&dg, // pointer to output buffer
sizeof(dg), // size, in bytes, of lpOutBuffer
&br, // pointer to variable to receive output
byte count
NULL // pointer to OVERLAPPED structure for
asynchronous operation
)) return (false);
if (dg.BytesPerSector!=512) return (false);
*ds=/*(dg.BytesPerSector)**/(dg.SectorsPerTrack)*(dg.TracksPerCylinder)*(dg.
Cylinders.LowPart);
*ds=*ds-1;
return (true);
}
char drivet[]="\\\\.\\PHYSICALDRIVEX";
char selected_drive;
bool open_disc (unsigned char fmode) {
DWORD dw, le;
drivet[17]=selected_drive+'0';
if (fmode==0)
{
dh = CreateFile(
drivet, // pointer to name of the file
GENERIC_READ, // access mode
FILE_SHARE_READ|FILE_SHARE_WRITE, // share mode
NULL, // pointer to security attributes
OPEN_EXISTING, // how to create
0, // file attributes
NULL // handle to file with attributes
to copy
);
}
else
{
dh = CreateFile(
drivet, // pointer to name of the file
GENERIC_READ|GENERIC_WRITE, // access mode
FILE_SHARE_READ|FILE_SHARE_WRITE, // share mode
NULL, // pointer to security attributes
OPEN_EXISTING, // how to create
0, // file attributes
NULL // handle to file with attributes
to copy
);
}
if (dh==INVALID_HANDLE_VALUE) {
le=GetLastError ();
return (false);
}
dw = GetFileType (dh);
if (dw!=FILE_TYPE_DISK) {
CloseHandle (dh);
return (false);
}
if (!get_drive_size (&sd_tot_size)) {
CloseHandle (dh);
return (false);
}
return (true);
}
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>Jestli by to nevadilo, tak bych byl za kousek kodu rad <span
class="moz-smiley-s1"><span> :) </span></span>.
<span class="moz-txt-citetags">></span>Tou vetou jsem chtel rict ze casto se CreateFile pouziva pro pristup na
<span class="moz-txt-citetags">></span>disk, ale ne primo RAW, ale souborovy zapis v ramci filesystemu.
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>Zatim me nenapada co pouzit jako "pointer to name of the file" (/*???*/)
<span class="moz-txt-citetags">></span>, je to hned prvni parametr funkce createfile. Mluvim o pripadu kdy chci
<span class="moz-txt-citetags">></span>pristup na USB ctecku karet. Abych treba omylem nehrabnul na pevny disk
<span class="moz-txt-citetags">></span>a pak by byl problem na svete.
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>hDevice = CreateFile( /*???*/ , GENERIC_READ | GENERIC_WRITE,
<span class="moz-txt-citetags">></span>FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0,
<span class="moz-txt-citetags">></span>NULL);
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>Kdyz jsme u toho, podobny pristup by sel pouzit i na seriovy a LPT port?
</pre>
</blockquote>
<pre wrap=""><!---->
<a class="moz-txt-link-freetext"
href="http://forum.builder.cz/read.php?123,1555971,1557011#msg-1557011">http://forum.builder.cz/read.php?123,1555971,1557011#msg-1557011</a>
<a class="moz-txt-link-freetext"
href="http://forum.builder.cz/read.php?23,1472592,1477895#msg-1477895">http://forum.builder.cz/read.php?23,1472592,1477895#msg-1477895</a>
<a class="moz-txt-link-freetext"
href="http://forum.builder.cz/read.php?23,1447448,1448208#msg-1448208">http://forum.builder.cz/read.php?23,1447448,1448208#msg-1448208</a>
J.Ber
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>DeviceIOControl je spis na nastavovani nejakych specifickych vlastnosti.
<span class="moz-txt-citetags">></span>Ano pomoci funkci (CreateFile, ReadFile, WriteFile, CloseHandle)
<span class="moz-txt-citetags">></span>zapise/prectete
<span class="moz-txt-citetags">></span>raw data do/z jakehokoliv sektroru.
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>Nevim co si predstavit pod touto vetou ?:
<span class="moz-txt-citetags">></span>"mel jsem za to ze v pripade disku se pouziva session pres FAT nebo NTFS"
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>Kdyz to bude nutny, tak muzu poslat i kus
<span class="moz-txt-citetags">></span>kodu na ukazku, ale fakt to neni veda.
</pre>
</blockquote>
<pre wrap=""><!---->
</pre>
<blockquote type="cite">
<pre wrap=""><span class="moz-txt-citetags">></span>J.Ber
</pre>
</blockquote>
<pre wrap=""><!---->
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</pre>
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