> Please note that it is not really a good idea to copy over a shared
> library that is possibly in use. I usually do the following:
> 	mv /usr/libexec/ld.so /usr/libexec/ld.so-
> 	mv /usr/libexec/ld.so.good /usr/libexec/ld.so
> 	rm /usr/libexec/ld.so-

You can significantly reduce the window size with:

	ln /usr/libexec/ld.so /usr/libexec/ld.so-
	mv /usr/libexec/ld.so.good /usr/libexec/ld.so
	rm /usr/libexec/ld.so-

This is a standard trick for updating kernels on systems without a
real boot loader.