Public bug reported:
This issue is reported upstream at
https://github.com/zfsnap/zfsnap/issues/91 and fixed in
https://github.com/zfsnap/zfsnap/commit/f895af7835fdc08f7115b31307e71a064e8afe7b
The issue is that when running zfSnap under cron which is managed by
systemd-cron we get errors like these and snapshots are not created.
```
$ sudo systemctl status cron-daily-zfSnap.service
○ cron-daily-zfSnap.service - [Cron] /etc/cron.daily/zfSnap
Loaded: loaded (/etc/cron.daily/zfSnap; generated)
Active: inactive (dead) since Sat 2024-05-11 01:02:32 JST; 8min ago
TriggeredBy: ● cron-daily-zfSnap.timer
Docs: man:systemd-crontab-generator(8)
Process: 57556 ExecStart=/etc/cron.daily/zfSnap (code=exited,
status=0/SUCCESS)
Main PID: 57556 (code=exited, status=0/SUCCESS)
CPU: 1.144s
May 11 01:02:31 neo systemd[1]: Starting cron-daily-zfSnap.service - [Cron]
/etc/cron.daily/zfSnap...
May 11 01:02:31 neo zfSnap[57557]: /usr/sbin/zfSnap: 365: cannot create
/dev/stderr: No such device or address
May 11 01:02:31 neo zfSnap[57557]: /usr/sbin/zfSnap: 365: cannot create
/dev/stderr: No such device or address
May 11 01:02:32 neo systemd[1]: cron-daily-zfSnap.service: Deactivated
successfully.
May 11 01:02:32 neo systemd[1]: Finished cron-daily-zfSnap.service - [Cron]
/etc/cron.daily/zfSnap.
May 11 01:02:32 neo systemd[1]: cron-daily-zfSnap.service: Consumed 1.144s CPU
time.
May 11 01:02:32 neo systemd[1]: cron-daily-zfSnap.service: Triggering
OnSuccess= dependencies.
```
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: zfsnap 1.11.1-8.1
Uname: Linux 5.15.146.1-microsoft-standard-WSL2 x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CloudArchitecture: x86_64
CloudBuildName: server
CloudID: none
CloudName: none
CloudPlatform: none
CloudSerial: 20190521
CloudSubPlatform: config
Date: Sat May 11 01:05:09 2024
PackageArchitecture: all
ProcEnviron:
LANG=C.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=tmux-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: zfsnap
UpgradeStatus: Upgraded to noble on 2024-05-09 (1 days ago)
** Affects: zfsnap (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cloud-image noble wayland-session
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https://bugs.launchpad.net/bugs/2065427
Title:
zfsnap does not work under systemd - errors writing to /dev/stderr
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