tree 91ab000051963b749c820cbbc38971de58713ab6
parent 805c01a710ca238e33932f2d323600b83ba6ec9c
author Jan Kundrát <jan.kundrat@cesnet.cz> 1675874346 +0100
committer Jan Kundrát <jan.kundrat@cesnet.cz> 1675875013 +0100

tests: allow overriding `mount` for mounting sysfs in the mount NS

On my NixOS, `mount` is a SUID wrapper which fails in a user NS with our
UID mapping, like this:

 Assertion `!(st.st_mode & S_ISUID) || (st.st_uid == geteuid())` in NixOS's wrapper.c failed.

That's because in the created NS, the `/run/wrappers/bin/mount` appears
to be owned by `nobody:nogroup`. Fortunately, there's also the
`/run/current-system/sw/bin/mount` which does not involve any fancy
wrappers. So just let me pass
`-DMOUNT_EXECUTABLE=/run/current-system/sw/bin/mount` in my local build
script.

Bug: https://github.com/NixOS/nixpkgs/issues/42117#issuecomment-974194691
Change-Id: If5c601981c69bc179e5e413cc6692a56db65529d