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If we enter a mount namespace with nstool exec our working directory will
be changed to / in the new mount ns. This is surprising if we haven't
actually altered any mounts yet in the new ns. Instead, change the working
directory to match that of the holder process in this situation.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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This is possible useful in nstool info and has further uses for nstool
exec.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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This allows you to run commands within a user namespace with the
privilege that comes from owning that userns.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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This combines nstool info -pw <sock> with nsenter with various options for
a more convenient and less verbose of entering existing nstool managed
namespaces.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Will make things a bit less verbose in future.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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So that we'll probably give a better error if you point it at something
that's not an nstool hold control socket.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Give nstool the ability to detect what namespaces the target process is in,
relative to where it's called. That is, those namespace types for which
the target is not in the same namespace as the caller. For now, just
print this information with "info", which can be useful for debugging.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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The new subcommand gives more information about the holder process and its
namespace, and may be further extended in future. Add some options which
give the old behaviour for existing scripts.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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This will make it easier to differentiate the options to those commands
further in future.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Easier to see it there.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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Having the "subcommand" first is more conventional and will make it more
natural for future extensions I have planned.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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In preparation for extending what it does.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
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