On 07/08/2014 04:42 PM, Harry Putnam wrote: > I must be miss-understanding the usage of sudo's option `-E' (preserve users > env). > > One would think that tools found along user path would then be > available to `sudo' > > Here is what puzzles me:
[...]
> ------- ------- ---=--- ------- -------
> And now testing sudo -E
> ------- ------- ---=--- ------- -------
>
> harry $ sudo -E echo $PATH (filtered)
>
> . . . . . . . . . [...] /merb/dv/home/harry/scripts: [...] . . . . .
>
>
> OK, so far sudo -E has retained the $PATH env of user `harry' that
> leads to the script in question.
As far as I can tell, sudo has _not_ retainet the $PATH, $PATH has been
replaced by it's contents in your shell and therefore the real
invocation looks like that:
$ sudo -E echo ...:/merb/dv/home/harry/scripts:...
In other words: The variable is not resolved inside the shell started by
sudo but in your own instead.
> However, in that case I do not understand this behavior below:
>
> sudo -E which enw
>
> {no output}
>
> sudo -E enw
>
> sudo: enw: command not found
I do not understand it either. I just tried it and the ``problem'' is
reproducible: I believe it is related to some sudo policy or such. (The
manpage says ``Environment: PATH May be overriden by the security
policy.'') Also, this seems to be special to the $PATH variable. Others
work fine.
Try, for example (I have not copied this from a shell, but that is the
gist of what happens if one tests it):
$ export TEST=x
$ sudo -Es
# echo $TEST
x
# exit
$ export PATH=$PATH:test
$ echo $PATH
[...]:test
$ sudo -Es
# echo $PATH
[...] -- test is missing
# exit
$ echo $PATH
[...]:test
HTH
Linux-Fan
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