Rustix on Haiku doesn't support CWD, so use the non-at versions of functions, since tempfile was only ever passing CWD to them.
For link, switch to std::fs::hard_link, since the link function has platform-dependent behavior and std has code to deal with that. This should also help portability to some platforms which lack linkat.
Rustix on Haiku doesn't support
CWD, so use the non-atversions of functions, since tempfile was only ever passingCWDto them.For
link, switch tostd::fs::hard_link, since thelinkfunction has platform-dependent behavior and std has code to deal with that. This should also help portability to some platforms which lacklinkat.