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Bug#860545: debootstrap fails to locate xzcat if the default shell is set to posh

On Tue, Apr 18, 2017 at 01:44:52PM +0200, Olliver Schinagl wrote:
>Package: debootstrap
>Version: 1.0.89
>Severity: normal
>Dear Maintainer,
>Trying to run debootstrap with just acl (the first package in the list) fails
>at unpacking due to a missing xzcat
>sudo debootstrap  --merged-usr  --variant=minbase --components=main,non-free
>--include=acl jessie /tmp/debtest http://deb.debian.org/debian
>I: Chosen extractor for .deb packages: ar
>I: Extracting acl...
>E: Extracting .//var/cache/apt/archives/acl_2.2.52-2_amd64.deb requires the
>xzcat command, which is not available
>$ which xzcat
>changing /bin/sh -> dash fixes it, but I would have figued that if debootstrap
>has its shebang set to /bin/sh, it would work with any posix shell, including
>(I read the warning:
>WARNING: Since many of Debian's /bin/sh scripts are not actually policy-
>compliant, using posh as your /bin/sh may reveal breakage.)

Just tested this - it appears that posh doesn't include "type", which
is what debootstrap is using to check what's available. I don't
personally know if "type" is a hard requirement in a posix shell here.

Steve McIntyre, Cambridge, UK.                                steve@einval.com
"We're the technical experts.  We were hired so that management could
 ignore our recommendations and tell us how to do our jobs."  -- Mike Andrews

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