We should always have unlinked any old ones before, but this just makes
sure that we never over-write any old file.
A quick "grep" now shows that all the core tools that open files for
writing use O_EXCL, ie we never overwrite an existing file in place.
IIRC our strategy was to let the users' umask take care of the
final mode bits. This patch fixes places that deviate from it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
