Sudo mails

Hi sudo-workers,

I've found an issue and I don't understand why is that so.

Sudo is sending mails depends on "sss" option in nsswitch.conf which is absolutely unrelated or is it?.
I expect that if some user used sudo in way against sudoers policy, root gets an email about it by default.

So if you create user e.g.

# useradd abc
# passwd abc #set 'abc' or whatever

then in sudoers add line:
# visudo
.
.
abc     ALL=(ALL)       /bin/ls
.
.


when the sudoers option is used in nsswitch.conf something like..

vim /etc/nsswitch.conf

.
.
.
sudoers   files 
.
.
.

and then:
# su - abc
$ sudo ls # sudo shouldn't send mail and it does not
$ sudo date # sudo should send mail but it does not

In this case sudo doesn't send mails, but when you change sudoers option in nsswitch.conf:

vim /etc/nsswitch.conf

.
.
.
sudoers   files sss
.
.
.

and then again:
# su - abc
$ sudo ls # sudo shouldn't send mail and it does
$ sudo date # sudo should send mail and it really does

Sudo sends mails everytime it is used.

It's applicable on sudo 1.8.15.

Is that normal bahavior?
I'm not sure if I'm right, but it does not make any sense to me.


Radovan Sroka
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