90 lines
3.1 KiB
Bash
90 lines
3.1 KiB
Bash
#!/bin/sh
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set -e
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is_merged() {
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directories="/bin /sbin /lib"
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for dir in $directories; do
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[ -e "$DPKG_ROOT$dir" ] || continue
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[ "$(readlink -f "$DPKG_ROOT$dir")" = "$DPKG_ROOT/usr$dir" ] || return 1
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done
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# Avoid an exact match, as the target might vary depending on the tool
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# building the image. For example, systemd-nspawn links /lib64 to
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# /usr/lib/aarch64-linux-gnu on arm64, while on amd64 debootstrap links it to
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# /usr/lib64 and doesn't create it at all on arm64.
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# See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1019575
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arch_directories="/lib64 /lib32 /libo32 /libx32"
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for dir in $arch_directories; do
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[ -e "$DPKG_ROOT$dir" ] || continue
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case "$(readlink -f "$DPKG_ROOT$dir")" in
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"$DPKG_ROOT/usr/lib"*) ;;
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*) return 1;;
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esac
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done
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return 0
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}
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fail_if_unmerged() {
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if is_merged; then return; fi
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cat << END
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******************************************************************************
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*
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* The systemd package cannot be installed because this system does
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* not have a merged /usr.
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*
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* Please install the usrmerge package to convert this system to merged-/usr.
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*
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* For more information please read https://wiki.debian.org/UsrMerge.
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*
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******************************************************************************
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END
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exit 1
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}
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# begin-remove-after: released:trixie
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handle_tmp() {
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# We used to ship tmp.mount in /usr/share as an example, and some users link it in /etc/,
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# remove the link as a workaround until Trixie ships. This method would also have created
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# a link in local-fs.target.wants, so remove that too.
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if [ -L "$DPKG_ROOT/etc/systemd/system/tmp.mount" ] && [ "$(readlink "$DPKG_ROOT/etc/systemd/system/tmp.mount")" = "/usr/share/systemd/tmp.mount" ]; then
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rm -f "$DPKG_ROOT/etc/systemd/system/tmp.mount"
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rm -f "$DPKG_ROOT/etc/systemd/system/local-fs.target.wants/tmp.mount"
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fi
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# The user may have used 'systemctl enable /usr/share/systemd/tmp.mount', which
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# would have created a symlink in the local-fs.target.wants directory (as the
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# pre-Trixie tmp.mount included an [install] section for that purpose). If it
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# exists, remove it.
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if [ -L "$DPKG_ROOT/etc/systemd/system/local-fs.target.wants/tmp.mount" ] && [ "$(readlink "$DPKG_ROOT/etc/systemd/system/local-fs.target.wants/tmp.mount")" = "/usr/share/systemd/tmp.mount" ]; then
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rm -f "$DPKG_ROOT/etc/systemd/system/local-fs.target.wants/tmp.mount"
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fi
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# Unless it's already running, ensure /tmp/ does not get overwritten by
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# the tmpfs from tmp.mount in case a unit is later activated that implicitly
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# depends on it (for example with PrivateTmp=yes) by runtime masking it
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# Do not use systemctl here, as libsystemd-shared might not be unpacked yet
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if [ -z "$DPKG_ROOT" ] && [ -d /run/systemd/system ] && ! df --output=fstype /tmp | grep -q tmpfs; then
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touch /run/systemd/system/tmp.mount
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fi
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}
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# end-remove-after
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case "$1" in
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install|upgrade)
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fail_if_unmerged
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# begin-remove-after: released:trixie
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if [ -n "$2" ] && [ -n "$3" ]; then
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handle_tmp
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fi
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# end-remove-after
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;;
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esac
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#DEBHELPER#
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