fl-cow - 0.6-10 main

Fl-cow allows you to utilise hard links to save disk space by causing
hard-linked files to be copied rather than overwritten as they are changed.
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This is useful for making changes to large source trees while keeping a copy
of the original tree to generate patches from. Also, if you are using the
Arch revision control system with working copies hard-linked to a revision
library, using fl-cow can prevent revision library corruption.
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Fl-cow is an LD_PRELOAD hack, not a kernel patch.