From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 17 Jul 2011 20:51:16 +0000 (+0100)
Subject: safely.lisp: More on the CLisp RENAME-FILE mess.
X-Git-Url: https://git.distorted.org.uk/~mdw/lisp/commitdiff_plain/9224720f63a3a3f810ce03dc4018e23a0c6d8492?hp=9224720f63a3a3f810ce03dc4018e23a0c6d8492

safely.lisp: More on the CLisp RENAME-FILE mess.

The :IF-EXISTS option is only in very new versions of CLisp.  It turns
out that the bizarre double-pathname-merging bug in POSIX:COPY-FILE
doesn't cause trouble if the source is absolute (unsurprising, in
retrospect) so I could use TRUENAME to dig my way out of this mess; but
COPY-FILE will clobber the target file before looking to see whether the
source succeeds (unless persuaded otherwise with :IF-EXISTS, which only
works if RENAME-FILE understands that option).

Give up, and use rename(2) through the FFI.
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