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SubjectRe: Fwd: File system corruption
On Mon, Jan 06, 2003 at 03:06:20PM +0000, Alan Cox wrote:
> Might be interesting to see what it does given a totally not FAT
> environment (eg fill the disk start to end with each sector filled
> with its sector number repeatedly) and see what comes out the other
> end.

How about the following program to do this.

Roger.


/* Written By R.E.Wolff@BitWizard.nl
*
* This program is distributed under GPL. */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

int main (int argc, char **argv)
{
int i;
int ascii = 0;
int size = 512;
long long secno;
char *buf;
int s;

for (i=1;i<argc;i++) {
if (strcmp (argv[i], "-a") == 0) {
ascii = 1;
}
if (strcmp (argv[i], "-b") == 0) {
ascii = 0;
}

if (strncmp (argv[i], "-s", 2) == 0) {
if (strlen (argv[i]) > 2)
size = atoi (argv[i]+2);
else
/* Sorry. Will crash if you specify -s as the last argument */
size = atoi (argv[++i]);
}
}

buf = malloc (size + 16);

if (!buf) {
fprintf (stderr, "Can't allocate buffer.\n");
exit (1);
}

secno = 0;
while (1) {
if (ascii) {
sprintf (buf, "%lld\n", secno);
s = strlen (buf);
for (i=s;i<size;i+=s)
sprintf (buf+i, "%lld\n", secno);
} else {
for (i=0;i<size;i+=sizeof (long long))
*(long long *)(buf+i) = secno;
}
if (write (1, buf, size) < 0)
break;
secno++;
}
exit (0);
}

--
** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 **
*-- BitWizard writes Linux device drivers for any device you may have! --*
* The Worlds Ecosystem is a stable system. Stable systems may experience *
* excursions from the stable situation. We are currently in such an *
* excursion: The stable situation does not include humans. ***************
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