133 lines
4.3 KiB
Bash
133 lines
4.3 KiB
Bash
#! @shell@
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set -e
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export PATH=/empty
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for i in @path@; do PATH=$PATH:$i/bin:$i/sbin; done
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action="$1"
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if ! test -e /etc/NIXOS; then
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echo "This is not a NixOS installation (/etc/NIXOS) is missing!"
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exit 1
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fi
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if test -z "$action"; then
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cat <<EOF
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Usage: $0 [switch|boot|test]
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switch: make the configuration the boot default and activate now
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boot: make the configuration the boot default
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test: activate the configuration, but don't make it the boot default
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EOF
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exit 1
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fi
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# Install or update the bootloader.
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if [ "$action" = "switch" -o "$action" = "boot" ]; then
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if [ "@bootLoader@" = "grub" ]; then
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if [ -n "@grubDevice@" ]; then
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mkdir -m 0700 -p /boot/grub
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@menuBuilder@ @out@
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if [ "@grubDevice@" != nodev ]; then
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# If the GRUB version has changed, then force a reinstall.
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oldGrubVersion="$(cat /boot/grub/version 2>/dev/null || true)"
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newGrubVersion="@grubVersion@"
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if [ "$NIXOS_INSTALL_GRUB" = 1 -o "$oldGrubVersion" != "$newGrubVersion" ]; then
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echo "installing the GRUB bootloader..."
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@grub@/sbin/grub-install "$(readlink -f "@grubDevice@")" --no-floppy
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echo "$newGrubVersion" > /boot/grub/version
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fi
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fi
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else
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echo "Warning: don't know how to make this configuration bootable; please set \`boot.loader.grub.device'." 1>&2
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fi
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elif [ "@bootLoader@" = "generationsDir" ]; then
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@menuBuilder@ @out@
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else
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echo "Warning: don't know how to make this configuration bootable; please enable a boot loader." 1>&2
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fi
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if [ -n "@initScriptBuilder@" ]; then
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@initScriptBuilder@ @out@
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fi
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fi
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# Activate the new configuration.
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if [ "$action" = "switch" -o "$action" = "test" ]; then
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oldVersion=$(cat /var/run/current-system/upstart-interface-version 2> /dev/null || echo 0)
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newVersion=$(cat @out@/upstart-interface-version 2> /dev/null || echo 0)
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if test "$oldVersion" -ne "$newVersion"; then
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cat <<EOF
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Warning: the new NixOS configuration has an Upstart version that is
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incompatible with the current version. The new configuration won't
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take effect until you reboot the system.
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EOF
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exit 1
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fi
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oldJobs=$(readlink -f /etc/static/init)
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newJobs=$(readlink -f @out@/etc/init)
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stopJob() {
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local job=$1
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initctl stop "$job" || true
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}
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# Stop all services that are not in the new Upstart
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# configuration.
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for job in $(cd $oldJobs && ls *.conf); do
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job=$(basename $job .conf)
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if ! test -e "$newJobs/$job.conf"; then
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echo "stopping $job..."
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stopJob $job
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fi
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done
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# Activate the new configuration (i.e., update /etc, make
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# accounts, and so on).
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echo "activating the configuration..."
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@out@/activate @out@
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# Make Upstart reload its jobs.
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initctl reload-configuration
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# Start all new services and restart all changed services.
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for job in $(cd $newJobs && ls *.conf); do
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job=$(basename $job .conf)
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# Hack: skip the shutdown and control-alt-delete jobs.
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# Another hack: don't restart the X server (that would kill all the clients).
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# And don't restart dbus, since that causes ConsoleKit to
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# forget about current sessions.
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# Idem for the emergeny-shell, because its `console owner'
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# line screws up the X server.
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# Idem for xendomains because we don't want to save/restore
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# Xen domains unless we have to.
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# TODO: Jobs should be able to declare that they should not be
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# auto-restarted.
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if echo "$job" | grep -q "^shutdown$\|^control-alt-delete$\|^xserver$\|^dbus$\|^disnix$\|^emergency-shell$\|^xendomains$\|^udevtrigger$"; then continue; fi
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if ! test -e "$oldJobs/$job.conf"; then
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echo "starting $job..."
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initctl start "$job" || true
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elif test "$(readlink "$oldJobs/$job.conf")" != "$(readlink "$newJobs/$job.conf")"; then
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echo "restarting $job..."
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stopJob $job
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initctl start "$job" || true
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fi
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done
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# Signal dbus to reload its configuration.
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dbusPid=$(initctl status dbus 2> /dev/null | sed -e 's/.*process \([0-9]\+\)/\1/;t;d')
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[ -n "$dbusPid" ] && kill -HUP "$dbusPid"
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fi
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