I ran a program on Windows 7 that was compiled under Cygwin and passed "NUL" as an output file name. Instead of suppressing output it actually created a file named "NUL" in the current directory. (Apparently it expects "/dev/null", even on Windows.) Now I'm stuck with this "NUL" file that I cannot delete!
I've already tried:
remove() in a C program - also fails
How can I get rid of these NUL files (I have several by now), short of installing the full Cygwin environment and compiling a C program under Cygwin to do it?
Open a command prompt and use these commands to first rename and then delete the NUL file:
C:\> rename \\.\C:\..\NUL. deletefile.txt
C:\> del deletefile.txt
\\.\ prefix tells the high-level file I/O functions to pass the filename unparsed to the device driver - this way you can access otherwise invalid names.
Read this article about valid file / path names in Windows and the various reserved names.