79 lines
2.3 KiB
Bash
79 lines
2.3 KiB
Bash
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#! @shell@
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set -e
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sw="/nix/var/nix/profiles/system/sw/bin"
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systemPath=$(${sw}/readlink -f /nix/var/nix/profiles/system)
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function start_systemd {
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echo "Starting systemd..." >&2
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PATH=/run/current-system/systemd/lib/systemd:@fsPackagesPath@ \
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LOCALE_ARCHIVE=/run/current-system/sw/lib/locale/locale-archive \
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@daemonize@/bin/daemonize /run/current-system/sw/bin/unshare -fp --mount-proc @systemdWrapper@
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# Wait until systemd has been started to prevent a race condition from occuring
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while ! $sw/pgrep -xf systemd | $sw/tail -n1 >/run/systemd.pid; do
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$sw/sleep 1s
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done
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# Wait for systemd to start services
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status=1
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while [[ $status -gt 0 ]]; do
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$sw/sleep 1
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status=0
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$sw/nsenter -t $(</run/systemd.pid) -p -m -- \
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$sw/systemctl is-system-running -q --wait 2>/dev/null ||
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status=$?
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done
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}
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# Needs root to work
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if [[ $EUID -ne 0 ]]; then
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echo "[ERROR] Requires root! :( Make sure the WSL default user is set to root" >&2
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exit 1
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fi
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if [ ! -e "/run/current-system" ]; then
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LANG="C.UTF-8" /nix/var/nix/profiles/system/activate
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fi
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if [ ! -e "/run/systemd.pid" ]; then
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start_systemd
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fi
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userShell=$($sw/getent passwd @defaultUser@ | $sw/cut -d: -f7)
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if [[ $# -gt 0 ]]; then
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# wsl seems to prefix with "-c"
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shift
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cmd="$@"
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else
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cmd="$userShell"
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fi
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# Pass external environment but filter variables specific to root user.
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exportCmd="$(export -p | $sw/grep -vE ' (HOME|LOGNAME|SHELL|USER)='); export WSLPATH=\"$PATH\"; export INSIDE_NAMESPACE=true"
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if [[ -z "${INSIDE_NAMESPACE:-}" ]]; then
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# Test whether systemd is still alive if it was started previously
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if ! [ -d "/proc/$(</run/systemd.pid)" ]; then
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# Clear systemd pid if the process is not alive anymore
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$sw/rm /run/systemd.pid
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start_systemd
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fi
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# If we are currently in /root, this is probably because the directory that WSL was started is inaccessible
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# cd to the user's home to prevent a warning about permission being denied on /root
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if [[ $PWD == "/root" ]]; then
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cd @defaultUserHome@
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fi
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exec $sw/nsenter -t $(</run/systemd.pid) -p -m -- $sw/machinectl -q \
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--uid=@defaultUser@ shell .host /bin/sh -c \
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"cd \"$PWD\"; $exportCmd; source /etc/set-environment; exec $cmd"
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else
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exec $cmd
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fi
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