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@ -7032,7 +7032,12 @@ or fill them with reproducible content:
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When creating a tarball, a temporary directory is populated with the rootfs
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before the tarball is packed. The location of that temporary directory will be
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in F</tmp> or the location pointed to by C<TMPDIR> if that environment variable
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is set.
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is set. Setting C<TMPDIR> to a different directory than F</tmp> is useful if
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you have F</tmp> on a tmpfs that is too small for your rootfs.
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If you set C<TMPDIR> in B<unshare> mode, then the unshared user must be able to
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access the directory. This means that the directory itself must be
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world-writable and all its ancestors must be at least world-executable.
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Since C<TMPDIR> is only valid outside the chroot, the variable is being unset
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when running hook scripts. If you need a valid temporary directory in a hook,
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