Escape char in pg_ls_dir

Hi,

I'm new to postgresql. I have a database running on a windows machine and I
need to use pg_ls_dir to list the contents of a folder, but I can't because
of the backslash (\), as it's not allowed.
If I run select pg_ls_dir('c:') I can see the listing of C:\, but I need to
check another folder.
If I run select pg_ls_dir(E'c:\inetpub'), I got an error "could not open
directory "c:inetpub": No such file or directory. So I now the \ is not
being used.
If I run select pg_ls_dir('c:\\inetpub'), it says "absolute path not
allowed". 

Anyone can give me a hint of how can I do this?

Thanks



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