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added utils_pathname_to_inode based on Lode's version from ntfsls 

in __metadata
  the root directory is definitely metadata now (rationale: stuff the user cannot delete)
  check for extent inodes of metadata files

(Logical change 1.192)
edge.strict_endians
flatcap.org!ntfs 2003-10-10 21:42:48 +00:00
parent 127d183ef8
commit 904b95f03d
1 changed files with 103 additions and 4 deletions
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107
ntfsprogs/utils.c
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@ -1,8 +1,9 @@
/**
* utils.c - Part of the Linux-NTFS project.
*
* Copyright (c) 2002 Richard Russon
* Copyright (c) 2002-2003 Richard Russon
* Copyright (c) 2003 Anton Altaparmakov
* Copyright (c) 2003 Lode Leroy
*
* A set of shared functions for ntfs utilities
*
@ -39,6 +40,7 @@
#include "types.h"
#include "volume.h"
#include "debug.h"
#include "dir.h"
const char *ntfs_bugs = "Please report bugs to linux-ntfs-dev@lists.sourceforge.net\n";
const char *ntfs_home = "Linux NTFS homepage: http://linux-ntfs.sourceforge.net\n";
@ -672,14 +674,101 @@ int utils_mftrec_in_use (ntfs_volume *vol, MFT_REF mref)
return (buffer[byte] & bit);
}
/**
* utils_pathname_to_inode - Find the inode which represents the given pathname
* @vol: An ntfs volume obtained from ntfs_mount
* @parent: A directory inode to begin the search (may be NULL)
* @pathname: Pathname to be located
*
* Take an ASCII pathname and find the inode that represents it. The function
* splits the path and then descends the directory tree. If @parent is NULL,
* then the root directory '.' will be used as the base for the search.
*
* Return: inode Success, the pathname was valid
* NULL Error, the pathname was invalid, or some other error occurred
*/
ntfs_inode * utils_pathname_to_inode (ntfs_volume *vol, ntfs_inode *parent, const char *pathname)
{
u64 inum;
int len;
char *p, *q;
ntfs_inode *ni;
ntfs_inode *result = NULL;
uchar_t *unicode = NULL;
char *ascii = NULL;
if (!vol || !pathname) {
return NULL;
}
if (parent) {
ni = parent;
} else {
ni = ntfs_inode_open (vol, FILE_root);
if (!ni) {
Eprintf ("Couldn't open the inode of the root directory.\n");
goto close;
}
}
unicode = calloc (1, MAX_PATH);
ascii = strdup (pathname); // Work with a r/w copy
if (!unicode || !ascii) {
Eprintf ("Out of memory.\n");
goto close;
}
p = ascii;
while (p && *p && *p == PATH_SEP) // Remove leading /'s
p++;
while (p && *p) {
q = strchr (p, PATH_SEP); // Find the end of the first token
if (q != NULL) {
*q = '\0';
q++;
}
len = ntfs_mbstoucs (p, &unicode, MAX_PATH);
if (len < 0) {
Eprintf ("Couldn't convert name to Unicode: %s.\n", p);
goto close;
}
inum = ntfs_inode_lookup_by_name (ni, unicode, len);
if (inum == -1) {
Eprintf ("Couldn't find name '%s' in pathname '%s'.\n", p, pathname);
goto close;
}
if (ni != parent)
ntfs_inode_close (ni);
ni = ntfs_inode_open (vol, inum);
if (!ni) {
Eprintf ("Cannot open inode %lld: %s.\n", inum, p);
goto close;
}
p = q;
while (p && *p && *p == PATH_SEP)
p++;
}
result = ni;
ni = NULL;
close:
if (ni && (ni != parent))
ntfs_inode_close (ni);
free (ascii);
free (unicode);
return result;
}
/**
* __metadata
*/
static int __metadata (ntfs_volume *vol, u64 num)
{
if (num == FILE_root)
return 0;
if (num <= FILE_UpCase)
return 1;
if (!vol)
@ -707,10 +796,12 @@ int utils_is_metadata (ntfs_inode *inode)
ntfs_volume *vol;
ATTR_RECORD *rec;
FILE_NAME_ATTR *attr;
MFT_RECORD *file;
u64 num;
if (!inode)
return -1;
vol = inode->vol;
if (!vol)
return -1;
@ -719,6 +810,14 @@ int utils_is_metadata (ntfs_inode *inode)
if (__metadata (vol, num) == 1)
return 1;
file = inode->mrec;
if (file && (file->base_mft_record != 0)) {
num = MREF (file->base_mft_record);
if (__metadata (vol, num) == 1)
return 1;
}
file = inode->mrec;
rec = find_first_attribute (AT_FILE_NAME, inode->mrec);
if (!rec)
return -1;
@ -727,7 +826,7 @@ int utils_is_metadata (ntfs_inode *inode)
attr = (FILE_NAME_ATTR *) ((char *) rec + le16_to_cpu (rec->value_offset));
num = MREF (attr->parent_directory);
if (__metadata (vol, num) == 1)
if ((num != FILE_root) && (__metadata (vol, num) == 1))
return 1;
return 0;