Add scripts for chrooting into a glibc boot env.

- fish_prompt: to indicate that one is inside the chrooted fs

- launch-chroot: chroots into the folder, can be turned into C program
at some point to become setuid

- mount-zvol: commmand to mount zvols that have mountpoint= set

- chroot-mnt service: starts up the mounts, kills them with `sv down`.
service-and-tz.sh script was updated to install it

fish/.config/fish/functions/fish_prompt.fish

@@ -1 +1,5 @@
-source ("starship" init fish --print-full-init | psub)
+if [ $CHROOTED ]
+	alias fish_prompt='echo "[chroot]" (pwd) "> "'
+else
+	source ("starship" init fish --print-full-init | psub)
+end

utils/.local/bin/launch-chroot

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# use with sudo -E
+
+ROOTDIR="${1:-/mnt}"
+USERNAME="${SUDO_USER:-ericonr}"
+
+chroot "$ROOTDIR" /bin/sudo -u $USERNAME \
+	env CHROOTED=1 \
+	XDG_RUNTIME_DIR=$XDG_RUNTIME_DIR \
+	WAYLAND_DISPLAY=$WAYLAND_DISPLAY \
+	DISPLAY=$DISPLAY \
+	/bin/fish -C "cd"

utils/.local/bin/mount-zvol

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+DEVICE="${1:-zroot/ROOT/glibc}"
+MOUNT="${2:-/mnt}"
+
+mount -o zfsutil -t zfs "$DEVICE" "$MOUNT"

void/void.d/etc-x86/sv/chroot-mnt/finish

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+ROOTDIR=/mnt
+
+umount -R \
+	"$ROOTDIR/dev" \
+	"$ROOTDIR/proc" \
+	"$ROOTDIR/sys" \
+	"$ROOTDIR/etc/resolv.conf" \
+	"$ROOTDIR/tmp" \
+	"$ROOTDIR/home" \
+	"$ROOTDIR/run"
+
+rm -f "$ROOTDIR/chrooted"

void/void.d/etc-x86/sv/chroot-mnt/run

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+ROOTDIR=/mnt
+
+mount -o zfsutil -t zfs zroot/ROOT/glibc "$ROOTDIR"
+
+if ! [ -e "$ROOTDIR/chrooted" ]; then
+	# chroot has been launched already
+
+	# xchroot commands
+	mount --rbind /dev "$ROOTDIR/dev"
+	mount --rbind /proc "$ROOTDIR/proc"
+	mount --rbind /sys "$ROOTDIR/sys"
+	touch "$ROOTDIR/etc/resolv.conf"
+	mount --bind /etc/resolv.conf "$ROOTDIR/etc/resolv.conf"
+
+	mount --bind /tmp "$ROOTDIR/tmp"
+	mount --bind /home "$ROOTDIR/home"
+	mount --rbind /run "$ROOTDIR/run"
+
+	touch "$ROOTDIR/chrooted"
+fi
+
+exec pause

void/void.d/etc-x86/sv/chroot-mnt/supervise

@@ -0,0 +1 @@
+/run/runit/supervise.chroot-mnt

void/void.d/system/service-and-tz.sh

@@ -10,9 +10,9 @@ fi
 
 echo "Installing services"
 for service in \
-	alsa bluetoothd boltd chronyd dbus dhcpcd elogind iwd popcorn snooze-daily
+	bluetoothd boltd chronyd dbus dhcpcd elogind iwd popcorn snooze-daily
 do
-	if [ -r "/etc/sv/${service}" ] ; then
+	if [ -r "$MOUNTDIR/etc/sv/${service}" ] ; then
 		ln -s "/etc/sv/${service}" "$SERVICES"
 		echo "Installed service ${service}"
 	else
@@ -20,5 +20,7 @@ do
 	fi
 done
 
+cp -r etc-x86/sv/chroot-mnt "$SERVICES"
+
 echo "Setting timezone"
 ln -s /usr/share/zoneinfo/America/Sao_Paulo /etc/localtime