finding absolute pathname

[veda87]

I am using ext2 file system on linux-2.6.26. i want to know whether the file system keeps a record of the absolute pathname for each and every file that have been created. if so, where could i find it.

[darkrose0510]

No, a record like that isn't needed as long as each directory knows it's contents.

Why do you need to know the absolute path?

[veda87]

i need to know that because if i need to keep track of each and every file created. with help of the absolute address, i can easily perform path walk the file.
or else, can anyone tell me how to keep track of each and every file that has been created.

[busyfire]

hi,i am currently working in ext2 file systems.i need to know how to get the absolute pathname of a file.can anyone help?

[WuNMOjTIQanXWBcH]

or else, can anyone tell me how to keep track of each and every file that has been created.

You could intercept the «open»-libc-call via preloading. Keywords: ld, LD_PRELOAD. This effect can be globalised by:

$> man 8 ld.so
      …
      /etc/ld.so.preload
            File containing a compiled list of directories in which to search for libraries and an ordered list of candidate libraries.
      …

However this approach has a fatal flaw: it does not track file creations that bypass the use of libc-«open» but directly use the «open»-syscall. The only solution to that problem that currently comes to my mind would be to directly manipulate the responsible kernel code.

[veda87]

i got the absolute pathaname.... i got it through the function
char *dentry_path(struct dentry *dentry, char *buf, int buflen) which is defined in fs/dcache.c

it gives the pathname of the file from the root of the filesystem.....