Package: tzdata
Version: 2018e-0+deb9u1
Severity: important

On a Debian 9 machine:

patate:~> TZ=UTC date; TZ=UTC0 date
Sun Aug 12 03:02:35 CEST 2018
Sun Aug 12 01:02:35 UTC 2018

The first line is based on the /usr/share/zoneinfo/UTC file according
to strace, but this is wrong as CEST is not UTC. The file is:

-rw-r--r-- 1 root root 2971 2018-05-15 10:01:38 /usr/share/zoneinfo/UTC

which doesn't seem to be the original one. I assume that it got
corrupted via a write to /etc/localtime, but /etc/localtime is
a symlink to /usr/share/zoneinfo/Etc/UTC, which is itself a
symlink to /usr/share/zoneinfo/UTC.

Now, could the write to /etc/localtime be regarded as a bug?
Probably not, because /etc/localtime is a config file, and one
is allowed to write to config files under /etc.

In short, having a symlink from a file under /etc to a file from
a package does not seem to be correct.

BTW, on someone mentioned
another issue with a symlink: "It's not really wise to make
/etc/localtime a symlink. That used to be the standard behavior for
Linux in the past, but then someone realized that /usr/share/zoneinfo
could be on a different volume that's not always mounted, and we
definitely don't want to be without /etc/localtime, [...]"

-- System Information:
Debian Release: 9.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-7-amd64 (SMP w/16 CPU cores)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages tzdata depends on:
ii  debconf [debconf-2.0]  1.5.61

tzdata recommends no packages.

tzdata suggests no packages.

-- no debconf information

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