Re: Mcron jobs using with-mail-out

[Simon Streit <simon@netpanic.org>]

Hello,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:
>
> Felix Lechner via <help-guix@gnu.org> writes:
>>
>> Does anyone have a working job specification for Mcron that uses
>> "with-mail-out"? [1] I have some trouble providing (mcron redirect)
>> inside the gexp. Thanks!
>
> Sorry, I don't, but I'd be interested in a concrete example as well.

I figured out a procedure for my home environment:

--8<---------------cut here---------------start------------->8---
(use-modules (gnu packages guile-xyz))  ;to load mcron redirect

#~(job
   '(next-minute)
   #$(program-file
      "ls.scm"
      #~(begin
          (use-modules (mcron redirect))
          (setenv "PATH" (string-append (getenv "PATH")
                                        ":/run/setuid-programs/"))
          (with-mail-out (lambda ()
                           (system (string-append #$coreutils
                                                  "/bin/ls")))
                         "user@localhost"))))
--8<---------------cut here---------------end--------------->8---

It looks a slightly different when applying this job to a system wide
declaration:

--8<---------------cut here---------------start------------->8---
(use-modules (gnu packages guile-xyz))  ;to load mcron redirect

#~(job
   '(next-minute)
   #$(program-file
      "ls.scm"
      (with-extensions
          (list mcron)
        #~(begin
            (use-modules (mcron redirect))
            (setenv "PATH"
                    (string-append (getenv "PATH")
                                   ":/run/setuid-programs/"))
            (with-mail-out (lambda ()
                             (system (string-append #$coreutils
                                                    "/bin/ls"))))))))
--8<---------------cut here---------------end--------------->8---

The action has to have its PATH extended, otherwise it fails to find
sendmail.  With this I have mcron sending mail to me.

The documentation of mcron does not state that the user name is optional.


Have a nice day,

-- 
Simon