11 Sep
2016
11 Sep
'16
1:53 a.m.
On Sat, Sep 10, 2016 at 1:45 PM, Dario Niedermann <dnied(a)tiscali.it> wrote:
Il 10/09/2016 alle 11:41, Joerg Schilling ha scritto:
It can return an exit status: this makes it mostly equivalent to something
like 'test -d /foo && test -x /foo'.
- Dan C.
POSIX requires some commands to be callable via
exec().
Il 10/09/2016 alle 19:06, Random832 ha scritto:
something that is technically required by POSIX.
There is a general
requirement that "regular builtin" commands [with no exception for cd]
"shall be implemented in a manner so that they can be accessed via the
exec family of functions as defined in the System Interfaces volume of
POSIX.1-2008 and can be invoked directly by those standard utilities
that require it (env, find, nice, nohup, time, xargs)."
TIL! Still, it seems to me that there is no way the `cd' script can
actually accomplish anything, even when called by exec().