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Bug#1073169: debootstrap: support working on a nodev filesystem (e.g. /tmp)

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Package: debootstrap
Version: 1.0.134
Tags: patch
X-Debbugs-Cc: josch@debian.org
Control: affects -1 + src:genext2fs

Hi,

I tried running the genext2fs autopkgtest for the /usr-move bootstrap
upload and it failed rather early here while running debootstrap:

    Cannot install into target '/tmp/...' mounted with noexec or nodev

I thought Johannes fixed debootstrap to work without mknod via
https://salsa.debian.org/installer-team/debootstrap/-/merge_requests/109,
so why would it fail on nodev?

When you're root and on a nodev filesystem, mknod still works. What does
not work is writing to that device. Hence, the bind mounting code does
not come into effect here. That also leads us to a relatively obvious
solution: We can simply try writing to the created devices and perform
the bind mount dance if it does not.

I've prepared a patch for this.

Helmut

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Bug#1073169: debootstrap: support working on a nodev filesystem (e.g. /tmp) Helmut Grohne <helmut@subdivi.de> - 2024-06-13 23:00 +0200
  Bug#1073169: debootstrap: support working on a nodev filesystem (e.g. /tmp) Luca Boccassi <bluca@debian.org> - 2024-06-13 23:20 +0200

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