Hard links to directories: why not?

[J. Michael Berkley]

> On 18 Jul 90 18:23:30 GMT, jbm at eos.UUCP (Jeffrey Mulligan) said:

JBM> What should be the output of the last command of this sequence?

JBM> mkdir dir1
JBM> mkdir dir2
JBM> mkdir dir1/a_directory
JBM> ln dir1/a_directroy dir2/directory_link
JBM> cd dir2/directory_link
JBM> cd ..
JBM> pwd

dir1:
	- dir2/directory_link/.. is a link to dir1 that existed before
	  dir1/a_directory was linked to dir2/directory_link