I tried investigating this bug a bit more with Athos' help. First, I cannot easily reproduce it because smartd doesn't even start when running on virtualized environments, and I don't feel like using my own host machine to test the problem.
Then, I noticed that there is a bug filed upstream which looked very similar to this one: https://www.smartmontools.org/ticket/1454 It *may* be related, but it doesn't seem to directly impact this one (keep reading). After looking at the flow of execution, it was clear that: - smartd will call /usr/share/smartmontools/smartd_warning.sh after having set a bunch of environment variables that affect the execution of the script. For our purposes, the only variables we will need to manually set are SMARTD_ADDRESS and SMARTD_MAILER. - Because SMARTD_MAILER will be set to /usr/share/smartmontools/smartd- runner, this is the script that will be executed afterwards. After looking at what "smartd-runner" does (it invokes every executable under /etc/smartmontools/run.d/), and after verifying that the only thing under /etc/smartmontools/run.d/ is a very simple script called "10mail" (which just invokes the "mail" command with some arguments), it's clear that we can try to reproduce this bug by hand. By the way, here is the smartd function that is responsible for putting the arguments together and actually invoking the smartd_warning.sh script: https://www.smartmontools.org/browser/tags/RELEASE_7_1/smartmontools/smartd.cpp#L1084 In a nutshell, what the function seems to do is: To reproduce the bug, we can: $ lxc launch images:ubuntu/focal smartmontools-focal $ lxc shell smartmontools-focal # apt update && apt install -y smartmontools bsd-mailx # adduser test # SMARTD_ADDRESS="root test" SMARTD_MAILER=/usr/share/smartmontools/smartd-runner /usr/share/smartmontools/smartd_warning.sh # mail root ... verify that there's an email from smartd_warning ... # su - test $ mail No mail for test I verified that the reporter's patch seems to fix the problem. @John, I noticed that you opened a bug against Debian, which is good. However, there is already a bug opened about this problem: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=661485 Could you please close your bug and comment on that other bug to let them know that you're also affected? Also, if you have the time, it would be good if you could also open a Merge Request against the Debian smartmontools project on salsa: https://salsa.debian.org/debian/smartmontools Thanks a lot. ** Bug watch added: www.smartmontools.org/ #1454 https://www.smartmontools.org/ticket/1454 ** Changed in: smartmontools (Ubuntu) Status: New => Triaged ** Changed in: smartmontools (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1927980 Title: smartd-runner bug causes loss of email recipients To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/smartmontools/+bug/1927980/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
