[TUHS] Shell control through external commands

Dario Niedermann dnied at tiscali.it
Sun Sep 11 03:45:55 AEST 2016


Il 10/09/2016 alle 11:41, Joerg Schilling ha scritto:

> 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().


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