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Fix /dev/ptmx rather than excluding makedev

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Revert exclusion of makedev from buildd chroots, as it turned out not to
be the problem.  Instead, fix up /dev/ptmx to be a character device node
rather than a symlink to /dev/pts/ptmx, in line with the discussion in
https://bugs.debian.org/817236; I think this is safer than
cherry-picking the fix to debootstrap at this point in a stable release
cycle.

LP: #1844504
This commit is contained in:
Colin Watson 2019-09-26 10:32:04 +01:00
parent 684c0c6888
commit 27ef9b07b4
3 changed files with 30 additions and 7 deletions
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11
debian/changelog vendored
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@ -1,3 +1,14 @@
livecd-rootfs (2.408.54) UNRELEASED; urgency=medium
* Revert exclusion of makedev from buildd chroots, as it turned out not to
be the problem. Instead, fix up /dev/ptmx to be a character device node
rather than a symlink to /dev/pts/ptmx, in line with the discussion in
https://bugs.debian.org/817236; I think this is safer than
cherry-picking the fix to debootstrap at this point in a stable release
cycle (LP: #1844504).
-- Colin Watson <cjwatson@ubuntu.com> Thu, 26 Sep 2019 10:31:55 +0100
livecd-rootfs (2.408.53) xenial; urgency=medium
* Fix exclusion of makedev from buildd chroots; debootstrap doesn't

7
live-build/buildd/hooks/00-no-makedev.chroot_early
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@ -1,7 +0,0 @@
#! /bin/sh
set -e
# makedev is "Priority: required" in xenial and so unavoidably installed by
# debootstrap, but it isn't truly required and has historically been
# excluded from buildd chroots.
apt-get -y purge makedev

19
live-build/buildd/hooks/00-ptmx-chardev.chroot_early Executable file
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#! /bin/sh
set -e
# debootstrap 1.0.76 started creating /dev/ptmx as a symlink to
# /dev/pts/ptmx. Unfortunately, this doesn't work with sbuild, because it
# leaves the ptmxmode mount option at its default of 000, which causes
# builds to be unable to open /dev/pts/ptmx. To avoid this, debootstrap
# 1.0.89 switched to creating it as a device node where possible. See
# https://bugs.debian.org/817236 for details and analysis.
#
# xenial has a version of debootstrap in the range that contains this bug.
# It seems too risky to try to cherry-pick the debootstrap change in
# question in an SRU at this point; instead, just fix things up here for
# buildd images.
if [ -h /dev/ptmx ]; then
mknod -m 666 /dev/ptmx.new c 5 2
mv /dev/ptmx.new /dev/ptmx
fi