On Sun, 1 Oct 2017, Chet Ramey wrote:
> On 9/30/17 4:20 AM, Mikulas Patocka wrote: > > > Is there some reason why do we need to check if $OLDPWD is a real > > directory? dash and ksh accept the $OLDPWD variable, but don't poke it > > with the stat syscall. zsh clears $OLDPWD. > > It makes no sense to inherit it if it doesn't name a directory (or > "pathname" in the Posix standard), other than the sort of lazy evaluation > that will prevent your particular problem. Does something bad happen if we inherit $OLDPWD that points to a non-existing directory? Will some script malfunction because of it? Mikulas > This is the same reasoning that rejects inheriting PWD if it doesn't name > the current directory. > > -- > ``The lyf so short, the craft so long to lerne.'' - Chaucer > ``Ars longa, vita brevis'' - Hippocrates > Chet Ramey, UTech, CWRU c...@case.edu http://cnswww.cns.cwru.edu/~chet/ >
