Paul Rimmer wrote:
>
> > Add this to /etc/multicron-p:
> >
> > environment () {
> > {
> > echo
> > echo "$(set)"
> > } | mailadmin "Environment List"
> > }
> >
> > Then, make sure that periodic contains the new function:
> >
> > periodic () {
> > environment
> > checkfreespace
> > pingcheck
> > }
> >
> > Now, wait for cron to act on this -- fortunately, with multicron-p, you
> > won't have to wait long ;>
>
> OK, I get the env variables with no mention of $HOSTNAME. I also added a
> printout of "$(whoami)" to see what user the process was running under but
> it returned a blank string.
>
> > Finally, try the same thing by adding this immediately prior to main():
> >
> > PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
> >
> > What do you think?
Sorry -- actually, I meant: add the PATH statement immediately prior to
the call to main, which is the last non-blank line in multicron-p. In
other words, make sure that you have a complete PATH *prior* to
performing any actions in multicron-p.
> As soon as I add the path change:
>
> <SNIP>
> ############################################################################
> ##
> # Processing Core It is recommended you don't add functions directly
> # to his file. Keep them external and source them.
> ############################################################################
> ##
>
> #Test Line follows
> PATH=/usr/local/sbin:/usr/local/bin:/sbin:/usr/sbin:/usr/bin
>
> main () {
>
> prog=`basename $0`
> <SNIP>
>
> The mailing no longer occurs. Remove it and I get the emails again but with
> no $HOSTNAME. Just so I know, what is the relationship between PATH and
> environment variables? How does adding the above path provide visibility to
> $HOSTNAME?
I had the opposite -- I could not send Email until I added the PATH line
-- probably due to *where* the PATH is inserted (see above).
Regarding the reason for this, it depends on how the cron process
assumes root authority. Under certain conditions, a process can assume
another uid _without_ any extraneous baggage normally associated with
that user. In this case, cron assumes root; but, does not login and
source /etc/profile . . .
--
Best Regards,
mds
mds resource
888.250.3987
Dare to fix things before they break . . .
Our capacity for understanding is inversely proportional to how much we
think we know. The more I know, the more I know I don't know . . .
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