Addendum to commit 32e6eed760 (r63715)
CORE-5982
The function assumed that the directory path name to be created
always starts with a harddisk-partition root device name of the form:
\Device\HarddiskX\PartitionY\
Indeed, it can be (when using the volume manager) of the form:
\Device\HarddiskVolumeN\
and could even have a different format if trying to install ReactOS
on an external removable drive or other weird device.
Since the format of this prefix is not 100% always the same,
a different way to create the sub-directories is needed.
The nested-directory creation algorithm is changed as follows:
Suppose that the directory to be created is:
\Device\HarddiskVolume1\ReactOS\system32\drivers
The function first loops backwards each path component in order
to find the deepest existing sub-directory: it will try to verify
whether each of the following sub-directories exist, successively:
\Device\HarddiskVolume1\ReactOS\system32\drivers
\Device\HarddiskVolume1\ReactOS\system32\
\Device\HarddiskVolume1\ReactOS\
\Device\HarddiskVolume1\
(Notice the trailing path separators kept in this step.)
In principle, this root device FS directory must exist (since the
volume has been formatted previously). Once found, the function will
then create each of the sub-directories in turn:
\Device\HarddiskVolume1\ReactOS
\Device\HarddiskVolume1\ReactOS\system32
\Device\HarddiskVolume1\ReactOS\system32\drivers
----
An alternative to the fix could be to always specify the root device
name in a separate parameter, but this hasn't been pursued here so as
to not modify all the callers of this function.
It was introduced in commit 703eb5e8c9 (r7756) in order to hack around
the "dot"-path added in the reactos.dff generator file by the earlier
commit 3bd689f185 (r7269).
Its aim was to describe the installation directory itself, instead of
one of its sub-directories.
That _invalid_ "dot"-path was removed later by commit 027e2bfa3a (r15423);
however the '\.' hack stayed for quite a while in our code.
The correct way to describe the installation directory itself is to use
instead "\", compatible with Windows' setup, as was originally done in
txtsetup.sif, and fixed in reactos.dff(.in) in commit 97bb83fcd9 (r66604).
- Use OBJ_CASE_INSENSITIVE when initializing object attributes
(no actual reason why to keep case sensitivity there).
- Check the success of a RtlStringCchPrintfW call in EnumerateReactOSEntries().
- Explicitly check for returned STATUS_NOT_SUPPORTED from ChkdskPartition()
or FormatPartition(), and display an appropriate error message.
- Remove some left-over comments but also explain why I kept some
commented code (mainly for future reference).
