getwd: should we really hard fail?

[apostasie]

Description

Investigating rootless-containers/usernetes#327

Current intuition is that the error comes from:
https://github.com/containerd/nerdctl/blob/main/pkg/rootlessutil/parent_linux.go#L87

Do we really need to hard-fail when we have no cwd?

Put otherwise: is it important that nsenter gets -w set no matter what (especially in the case where cwd does not exist), or can we just "not set" -w when getwd fails?

cc @AkihiroSuda

Steps to reproduce the issue

mkdir foo
cd foo
rmdir ../foo
nerdctl container run -d --name foo debian sleep Inf
FATA[0000] getwd: no such file or directory

Describe the results you received and expected

na

What version of nerdctl are you using?

main

Are you using a variant of nerdctl? (e.g., Rancher Desktop)

None

Host information

No response