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The systemd test suite does not like having no access to /sys/dev and
other trees related to devices. Optionally provide them. Properly
virtualizing them likely requires lxcfs or similar.
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Software has a reasonable assumption that localhost as well as the
current hostname resolves to an IP address. Without an /etc/hosts file,
this is not the case and makes some builds such as src:ovn fail.
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This is where unschroot becomes incompatible with schroot as schroot
does not have this option. The idea is that unschroot becomes
feature-compatible with sbuild --chroot-mode=unshare and that requires
supporting network isolation. To make use of this, sbuild needs to be
extended to pass this flag when it sees a "Type unshare" chroot that is
not normally exposed from regular schroot.
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When stdout is an (unnamed) pipe, it usually has permission 0o644. Since
we change uids, /dev/stdout cannot be opened unless we chmod it first.
This causes some packages such as supervisor to fail to build.
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No functional changes.
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linuxnamespaces/__init__.py:
* linuxnamespaces.filedescriptor only exports FileDescriptor. By
importing *, we re-export it implicitly.
linuxnamespaces/atlocation.py:
* PathLike should be parameterized and we no longer allow bytes there.
linuxnamespaces/tarutils.py:
* Resolve dict vs Mapping.
tests/test_simple.py:
* Establish expected type to mypy.
examples/unschroot.py:
* pidfd is first an int and later a FileDescriptor, but we always use
it as int.
* Also tell mypy that we cannot get NULL from waitid.
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While sbuild --chroot-mode=unshare opted for installing dumb-init, we'll
keep the environment minimal and have a dumb-init written in perl-base,
which happens to be essential still. Unfortunately, we cannot wait for
our target process from our main process as the target process is a
child of our perl init. Therefore our perl init must forward the exit
code.
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Before this change, it could happen that we'd call
prctl_set_child_subreaper before our parent actually died. Thus we'd
quickly get the death signal. The additional synchronization point
ensures that our previous parent process has been waited for (and thus
we are reparented) before installing the death signal.
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Any existing type would be an invalid promise. While sbuild parses the
type, it also currently throws its value away and does not base any
decisions on it. With the new value, it could recognize unschroot and
opt into new features.
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* Tag sessions as "Session Purged". This causes sbuild to skip
uninstalling build-depends and other cleanup.
* Always emit "Aliases" even when empty as we get a warning from sbuild
otherwise.
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Fixes: a1cc59818088 ("add example "unschroot.py"")
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While this mostly provides the schroot API and adds its own semantics
around ~/.cache/unschroot, please do not consider examples a stable
interface but a room for experimentation and incompatible changes.
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