Accessing "in Use" Files == ?

[shakuni]

How can I access the files that are in-use by other processes. Say there is this file called "locked.txt", which is in use by process A. Now how can I copy this file to another location programmatically. Normal methods will fail with the error "The process cannot access the file because it is being used by another
process.".
Any ideas ?

[ecube]

look on the forum, hutch posted code to do this.

[shakuni]

look on the forum, hutch posted code to do this.

Can't find it.

[hutch--]

shakuni,

For non-system files such as log files that are repeatedly being written to this method works OK in many instances but it will not open specialised system files.

Code Select Expand


          invoke CreateFile,OFFSET logbuffer,GENERIC_READ,
                            FILE_SHARE_WRITE or FILE_SHARE_READ,
                            NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL or \
                            FILE_FLAG_POSIX_SEMANTICS,NULL
          mov hFile, eax


The action is with the "FILE_FLAG_POSIX_SEMANTICS" flag as it changes the file access rules to asically Unix rules.

[jj2007]

Try also if there is a diff between using and not using FILE_SHARE_WRITE. Normally you would not need write access.

Attention FILE_FLAG_POSIX_SEMANTICS makes file names case-sensitive.

I assume you have tested a simple CopyFileA?

[Grincheux]

You could be interested with the following link : http://technet.microsoft.com/en-us/sysinternals/default.aspx?PHPSESSID=9692e6

Perhaps you saw it...