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build.sh: create static loop + dm device nodes in the container

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Jorijn van der Graaf 2026-08-08 19:57:43 +02:00
commit 6fb3ff27ef
1 changed files with 11 additions and 0 deletions
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11
build.sh
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@ -36,6 +36,17 @@ if [ "$(id -u)" = 0 ]; then
mkdir -p /usr/local/sbin mkdir -p /usr/local/sbin
printf '#!/bin/sh\nexit 0\n' > /usr/local/sbin/modprobe printf '#!/bin/sh\nexit 0\n' > /usr/local/sbin/modprobe
chmod +x /usr/local/sbin/modprobe chmod +x /usr/local/sbin/modprobe
# A privileged container's /dev is a snapshot from container start —
# loop/dm nodes the host creates later never appear. Create the static
# nodes here; opening them autoloads the drivers host-side (reserved
# major/minors: loop = block 7,N; device-mapper control = char 10,236).
i=0
while [ $i -le 15 ]; do
[ -b /dev/loop$i ] || mknod -m 660 /dev/loop$i b 7 $i
i=$((i + 1))
done
mkdir -p /dev/mapper
[ -c /dev/mapper/control ] || mknod -m 600 /dev/mapper/control c 10 236
id build >/dev/null 2>&1 || adduser -D build id build >/dev/null 2>&1 || adduser -D build
echo 'build ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/build echo 'build ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/build
rm -rf dist rm -rf dist