On Mon, 25 Jan 2016 17:29:51 +0100 Bastien Traverse wrote:

Hi,

I opened FS#47893 [1] to discuss this issue, but it's been closed with no delay and I can't really have a discussion via re-opening requests.

Upon installation of the tor package, directory /var/lib/tor is created (see PKGBUILD#40 [2]). Upon uninstallation, it is automatically deleted **only if empty**:

# pacman -S tor # touch /var/lib/tor/test # pacman -Rns tor # ls -lah /var/lib/tor total 8,0K drwx------ 2 tor tor 4,0K 25 janv. 16:50 . drwxr-xr-x 39 root root 4,0K 25 janv. 16:50 .. -rw-r--r-- 1 root root 0 25 janv. 16:50 test

# rm -rf /var/lib/tor

# pacman -S tor ... (1/1) installing tor error: command failed to execute correctly ... # pacman -Rns tor # ls -lah /var/lib/tor ls: cannot access /var/lib/tor: No such file or directory

However, tor user and group (UID/GID 43) created via post_install() hook [3] are not removed:

# pacman -Rns tor $ id tor uid=43(tor) gid=43(tor) groupes=43(tor)

This makes shadow.service fail at bootup:

pwck[718]: tor user: directory « /var/lib/tor » does not exist pwck[718]: pwck : no change systemd[1]: shadow.service: Main process exited, code=exited, status=2/INVALIDARGUMENT systemd[1]: Failed to start Verify integrity of password and group files. systemd[1]: shadow.service: Unit entered failed state. systemd[1]: shadow.service: Failed with result 'exit-code'.

Same for pwck.

What I asked in FS#47893 was to add a post_uninstall() hook to remove tor user (e.g. with `userdel tor`), so that **if /var/lib/tor has been deleted automatically** because it was empty, pwck doesn't trip on home dir verification.

Note that if /var/lib/tor isn't empty, `userdel tor` would merely remove the user entry and not delete its home directory (-r switch). Therefore, no data loss. Moreover, I believe it is possible to condition user deletion on directory existence (e.g. `if [ ! -e /var/lib/tor ]; then userdel tor; else :`), so that could do it too.

Reason for closing was "Not a bug / So fix it. This isn't something that can be dealt with automatically". I fail to see how it is so, but if I'm wrong please tell me so and why.

Thanks, Bastien

[1] https://bugs.archlinux.org/task/47893 [2] https://projects.archlinux.org/svntogit/community.git/tree/trunk/PKGBUILD?h=... [3] https://projects.archlinux.org/svntogit/community.git/tree/trunk/tor.install...

Dev discussion here: vhttps://lists.archlinux.org/pipermail/arch-dev-public/2015-February/026953.h...