sh: support reflinking directories #619
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- mktemp in /tmp - don't assume $0 is a file - remove stampfiles at exit - don't create stampfiles if -n is passed Closes sahib#554
- modify rm_util_link_type() to specifically detect directory pairs - modify sh output generator to emit cp_reflink for directory pairs - modify sh template to support reflinking directories and extend stampfile code to preserve attributes recursively Fixes sahib#618.
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There are no technical limitations preventing the use of
cp -a --reflink=alwayson directory pairs. With a few extensions to attribute preservation code, this seems to produce correct results.stampfile code to preserve attributes recursively
This also builds on @cebtenzzre's patch improving stampfile handling in the sh output generator.
Fixes #618.