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87dff0a2c7
This would allow building s390x images without access to an IBM Z. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
46 lines
1.5 KiB
Bash
Executable File
46 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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# This script builds a Debian root filesystem image for testing libbpf in a
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# virtual machine. Requires debootstrap >= 1.0.95 and zstd.
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# Use e.g. ./mkrootfs_debian.sh --arch=s390x to generate a rootfs for a
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# foreign architecture. Requires configured binfmt_misc, e.g. using
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# Debian/Ubuntu's qemu-user-binfmt package or
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# https://github.com/multiarch/qemu-user-static.
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set -e -u -x -o pipefail
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# Check whether we are root now in order to avoid confusing errors later.
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if [ "$(id -u)" != 0 ]; then
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echo "$0 must run as root" >&2
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exit 1
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fi
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# Create a working directory and schedule its deletion.
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root=$(mktemp -d -p "$PWD")
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trap 'rm -r "$root"' EXIT
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# Install packages.
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packages=binutils,busybox,elfutils,ethtool,iproute2,libcap2,libelf1,strace,zlib1g
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debootstrap --include="$packages" --variant=minbase "$@" bookworm "$root"
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# Remove the init scripts (tests use their own). Also remove various
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# unnecessary files in order to save space.
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rm -rf \
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"$root"/etc/rcS.d \
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"$root"/usr/share/{doc,info,locale,man,zoneinfo} \
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"$root"/var/cache/apt/archives/* \
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"$root"/var/lib/apt/lists/*
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# Save some more space by removing coreutils - the tests use busybox. Before
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# doing that, delete the buggy postrm script, which uses the rm command.
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rm -f "$root/var/lib/dpkg/info/coreutils.postrm"
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chroot "$root" dpkg --remove --force-remove-essential coreutils
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# Apply common tweaks.
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"$(dirname "$0")"/mkrootfs_tweak.sh "$root"
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# Save the result.
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name="libbpf-vmtest-rootfs-$(date +%Y.%m.%d).tar.zst"
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rm -f "$name"
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tar -C "$root" -c . | zstd -T0 -19 -o "$name"
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