On Tue, 30 Jan 2024 10:22:18 -0500 Chet Ramey <chet.ra...@case.edu> wrote:
> On 1/28/24 10:34 AM, Kerin Millar wrote: > > On Sun, 28 Jan 2024 18:09:24 +0300 > > Oğuz <oguzismailuy...@gmail.com> wrote: > > > >> On Sun, Jan 28, 2024 at 5:10 PM <j...@jwo.cz> wrote: > >>> POSIX Programmer's Manual (cd(1p) manpage) says this: > >>> > >>> [9 unrelated special cases] > >>> > >>> 10. The cd utility shall then perform actions equivalent to the > >>> chdir() function called with curpath as the path argument. If > >>> these actions fail for any reason, the cd utility shall > >>> display an appropriate error message and the remainder of > >>> this step shall not be executed. [...] > >> > >> Right before that, it says in 8.c: > >>> If, as a result of this canonicalization, the curpath variable is null, > >>> no further steps shall be taken. > >> > >> which is what happens in bash, busybox sh, dash, mksh, pdksh, oksh, > >> yash, zsh, and NetBSD sh. > >> > > > > I'm not sure that this is accurate. In my testing, bash does not even > > perform this canonicalization step, which is optional to begin with. That > > is, it states that "an implementation may" canonicalize in the manner > > described, and prescribes a course of action to take if - and only if - > > such canonicalization is performed. > > It does. Try `cd /usr/////////bin' and see what ends up in $PWD. Thanks. I doubted myself on this point upon reading your response to my last bug report (in which you spoke of canonicalization). I was certain that it was not material to the behaviour under discussion in this thread, though. -- Kerin Millar
