'Use in-memory buffer as a file

During my program's execution I get a buffer that I need to additionally feed into an external program and read it's output. Unfortunately, this program only accepts filenames as input and output, so I'd have to save this buffer to a disk first, but I'd like not to create temp files on the filesystem, if that's possible.

Is there any way to do this?

node.jslinuxfilein-memory


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