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2003/10/28 15:50:53+00:00 flatcap.org!ntfs
some cut'n'pasted code to wipe the pagefile and logfile

(Logical change 1.299)
edge.strict_endians
flatcap.org!ntfs 2004-03-06 17:42:28 +00:00
parent c6b229f6d4
commit 65182be272
1 changed files with 151 additions and 18 deletions
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169
ntfsprogs/ntfswipe.c
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@ -340,7 +340,6 @@ int parse_options (int argc, char *argv[])
return (!err && !help && !ver);
}
/**
* wipe_unused - Wipe unused clusters
* @vol: An ntfs volume obtained from ntfs_mount
@ -427,6 +426,8 @@ s64 wipe_tails (ntfs_volume *vol, int byte, enum action act)
*/
s64 wipe_mft (ntfs_volume *vol, int byte, enum action act)
{
// by considering the individual attributes we might be able to
// wipe a few more bytes at the attr's tail.
s64 i;
s64 total = 0;
s64 result = 0;
@ -461,8 +462,6 @@ s64 wipe_mft (ntfs_volume *vol, int byte, enum action act)
continue;
}
memset (buffer + size, byte, vol->mft_record_size - size);
result = ntfs_attr_mst_pwrite (vol->mft_na, vol->mft_record_size * i,
@ -573,10 +572,91 @@ s64 wipe_directory (ntfs_volume *vol, int byte, enum action act)
*/
s64 wipe_logfile (ntfs_volume *vol, int byte, enum action act)
{
const int NTFS_BUF_SIZE2 = 8192;
//FIXME(?): We might need to zero the LSN field of every single mft
//record as well. (But, first try without doing that and see what
//happens, since chkdsk might pickup the pieces and do it for us...)
ntfs_inode *ni;
ntfs_attr *na;
s64 len, pos, count;
char buf[NTFS_BUF_SIZE2];
int eo;
if (!vol || (byte < 0))
return -1;
Qprintf ("wipe_logfile (not implemented) 0x%02x\n", byte);
//Qprintf ("wipe_logfile (not implemented) 0x%02x\n", byte);
if ((ni = ntfs_inode_open(vol, FILE_LogFile)) == NULL) {
Dprintf("Failed to open inode FILE_LogFile.\n");
return -1;
}
if ((na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0)) == NULL) {
Dprintf("Failed to open $FILE_LogFile/$DATA\n");
goto error_exit;
}
/* The $DATA attribute of the $LogFile has to be non-resident. */
if (!NAttrNonResident(na)) {
Dprintf("$LogFile $DATA attribute is resident!?!\n");
errno = EIO;
goto io_error_exit;
}
/* Get length of $LogFile contents. */
len = na->data_size;
if (!len) {
Dprintf("$LogFile has zero length, no disk write needed.\n");
return 0;
}
/* Read $LogFile until its end. We do this as a check for correct
length thus making sure we are decompressing the mapping pairs
array correctly and hence writing below is safe as well. */
pos = 0;
while ((count = ntfs_attr_pread(na, pos, NTFS_BUF_SIZE2, buf)) > 0)
pos += count;
if (count == -1 || pos != len) {
Dprintf("Amount of $LogFile data read does not "
"correspond to expected length!");
if (count != -1)
errno = EIO;
goto io_error_exit;
}
/* Fill the buffer with 0xff's. */
memset(buf, -1, NTFS_BUF_SIZE2);
/* Set the $DATA attribute. */
pos = 0;
while ((count = len - pos) > 0) {
if (count > NTFS_BUF_SIZE2)
count = NTFS_BUF_SIZE2;
if ((count = ntfs_attr_pwrite(na, pos, count, buf)) <= 0) {
Dprintf("Failed to set the $LogFile attribute value.");
if (count != -1)
errno = EIO;
goto io_error_exit;
}
pos += count;
}
ntfs_attr_close(na);
return ntfs_inode_close(ni);
io_error_exit:
eo = errno;
ntfs_attr_close(na);
errno = eo;
error_exit:
eo = errno;
ntfs_inode_close(ni);
errno = eo;
return -1;
return 0;
}
@ -593,13 +673,75 @@ s64 wipe_logfile (ntfs_volume *vol, int byte, enum action act)
*/
s64 wipe_pagefile (ntfs_volume *vol, int byte, enum action act)
{
// wipe completely, chkdsk doesn't do anything, booting writes header
const int NTFS_BUF_SIZE2 = 4096;
ntfs_inode *ni;
ntfs_attr *na;
s64 len, pos, count;
char buf[NTFS_BUF_SIZE2];
int eo;
if (!vol || (byte < 0))
return -1;
Qprintf ("wipe_pagefile (not implemented) 0x%02x\n", byte);
return 0;
}
//Qprintf ("wipe_pagefile (not implemented) 0x%02x\n", byte);
ni = utils_pathname_to_inode (vol, NULL, "pagefile.sys");
if (!ni) {
Dprintf("Failed to open inode FILE_LogFile.\n");
return -1;
}
if ((na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0)) == NULL) {
Dprintf("Failed to open $FILE_LogFile/$DATA\n");
goto error_exit;
}
/* The $DATA attribute of the $LogFile has to be non-resident. */
if (!NAttrNonResident(na)) {
Dprintf("$LogFile $DATA attribute is resident!?!\n");
errno = EIO;
goto io_error_exit;
}
/* Get length of $LogFile contents. */
len = na->data_size;
if (!len) {
Dprintf("$LogFile has zero length, no disk write needed.\n");
return 0;
}
memset(buf, byte, NTFS_BUF_SIZE2);
/* Set the $DATA attribute. */
pos = 0;
while ((count = len - pos) > 0) {
if (count > NTFS_BUF_SIZE2)
count = NTFS_BUF_SIZE2;
if ((count = ntfs_attr_pwrite(na, pos, count, buf)) <= 0) {
Dprintf("Failed to set the $LogFile attribute value.");
if (count != -1)
errno = EIO;
goto io_error_exit;
}
pos += count;
}
ntfs_attr_close(na);
return ntfs_inode_close(ni);
io_error_exit:
eo = errno;
ntfs_attr_close(na);
errno = eo;
error_exit:
eo = errno;
ntfs_inode_close(ni);
errno = eo;
return -1;
}
/**
* ntfs_info - Display information about the NTFS Volume
@ -730,7 +872,6 @@ bmpdone:
free (bitmap);
}
/*
* wipe_unused - volume = n clusters, u unused (%age & MB)
* $Bitmap
@ -776,7 +917,6 @@ bmpdone:
return 1;
}
/**
* print_summary - Tell the user what we are about to do
*
@ -850,14 +990,8 @@ int main (int argc, char *argv[])
if (!vol)
goto free;
if (vol->flags & VOLUME_IS_DIRTY) {
Qprintf ("Volume is dirty.\n");
if (!opts.force) {
Eprintf ("Run chkdsk and try again, or use the --force option.\n");
goto umount;
}
Qprintf ("Forced to continue.\n");
}
if ((vol->flags & VOLUME_IS_DIRTY) && (!opts.force))
goto umount;
if (opts.info) {
act = act_info;
@ -962,4 +1096,3 @@ free:
return result;
}