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program usb_stick_tester;
{$mode objfpc}{$H+}
uses
sysUtils; //,systemunit;
var
f: file;
i,j,k,block_len: int64;
a: array[0..1023] of int64;
fehler: boolean;
begin
if paramcount<>1 then begin
writeln('usage: usb_stick_tester /dev/sdX');
halt(1);
end;
assignFile(f,paramstr(1));
try
reset(f,1);
except
writeln('error: could not open "' + paramstr(1) + '"');
halt(1);
end;
block_len:=length(a) * sizeof(a[0]);
j:=0;
while true do begin
for i:=0 to length(a)-1 do
a[i]:=j * block_len + i;
seek(f,j * block_len);
try
blockwrite(f,a[0],block_len);
except
writeln('write failed at position ' + intToStr(j*block_len) + ' .. ' + intToStr((j+1)*block_len-1));
break;
end;
if j>1 then begin
k:=random(j);
seek(f,k * block_len);
blockread(f,a[0],block_len);
fehler:=false;
for i:=0 to length(a)-1 do
if a[i] <> k * block_len + i then begin
if (a[i]-i) mod block_len = 0 then
writeln('Block ' + intToHex((a[i]-i) div block_len,2*sizeof(a[0])) + ' an Stelle ' + intToHex(k,2*sizeof(a[0])))
else
writeln('Byte ' + intToHex(a[i],2*sizeof(a[0])) + ' an Stelle ' + intToHex(k * block_len + i,2*sizeof(a[0])));
fehler:=true;
break;
end;
if fehler then
break;
end;
inc(j);
if j mod 1024 = 0 then
write('.');
end;
closeFile(f);
end.
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