# Default ruleset to get a simple application running
# The commands are:
#
# bind <from> <to>
#   take from the current filesystem a single directory and make it
#   available elsewhere. See the -rbind argument on /usr/bin/mount
# tmpfs <target>
#   create a tmpfs on the full path 'target'. Useful to hide sensitive
#   content.
# umount <path>
#   un-mount a mounted 'drive'.
#
# try
#   Prefix any command with 'try' to make its failure non-fatal.
#   Things like 'copy' or tmpfs also not auto-create a target
#    directory if this is a 'try'
#
# ---- replacement variables.
# $HOME         the actual homedir of the user
# $APPHOME      the location of the app-jail
#
# Notice that those variables are set at the start, as you do binds
# etc they may change and the variables will not be auto-updated to
# follow.
#
# ---- conditionals
# if [denied|allowed] <keyword>
#   # do stuff
# endif
#

copy $HOME/.config/kdedefaults/kdeglobals $APPHOME/config/kdefaults/
copy $HOME/.config/kdeglobals $APPHOME/config/

bind /tmp /var/tmp
umount /tmp
tmpfs /tmp
# x11 support
try bind /var/tmp/.X11-unix /tmp/.X11-unix
# xauth was in /tmp before wayland.
try copy /var/tmp/xauth_* /tmp/
# KDE sessions management server
try bind /var/tmp/.ICE-unix /tmp/.ICE-unix

setPermissionDefault dbus allowed
setPermissionDefault docker denied
setPermissionDefault dbus-system denied
setPermissionDefault git denied
setPermissionDefault ssh denied
# Give access to documents in homedir in the 'shared' dir.
setPermissionDefault homedir allowed
# media is 'mounts', like a USB device
setPermissionDefault media allowed
# access to things like pulseaudio and pipewire
setPermissionDefault audio allowed

# if there are specific rules for the current app,
# execute them here.
#   If no rules exist for the current app, run 'default.rules'
execute-apprules

# this one is critical, move the app into its little 'jail'
bind $APPHOME $HOME
# undo the bind from above
try umount /var/tmp

# backup of /run
bind /run /var/tmp
# blank out /run
tmpfs /run
# then bring back stuff we actually need
copy /var/tmp/user/$USERID/KSMserver* /run/user/$USERID/
# wayland support
try bind /var/tmp/user/$USERID/wayland-0 /run/user/$USERID/wayland-0
try bind /var/tmp/user/$USERID/wayland-1 /run/user/$USERID/wayland-1
try bind /var/tmp/user/$USERID/wayland-0.lock /run/user/$USERID/wayland-0.lock
try bind /var/tmp/user/$USERID/wayland-1.lock /run/user/$USERID/wayland-1.lock
try copy /var/tmp/user/$USERID/xauth_* /run/user/$USERID/

if allowed dbus
    bind /var/tmp/user/$USERID/bus /run/dbus/user-global
    # the targets should not be changed, the runner will
    # start the dbus proxy expecting these path.
endif
if allowed dbus-system
    bind /var/tmp/dbus/system_bus_socket /run/dbus/system-global
    # same as above, dbus proxy can be started.
endif
if allowed ssh
    try copy /var/tmp/user/$USERID/ssh-agent /run/user/$USERID/ssh-agent
endif

# give access to pipewire and pulse
if allowed audio
    try bind /var/tmp/user/$USERID/pipewire-0 /run/user/$USERID/pipewire-0
    try bind /var/tmp/user/$USERID/pipewire-0.lock /run/user/$USERID/pipewire-0.lock
    try bind /var/tmp/user/$USERID/pipewire-0-manager /run/user/$USERID/pipewire-0-manager
    try bind /var/tmp/user/$USERID/pipewire-0-manager.lock /run/user/$USERID/pipewire-0-manager.lock
    try bind /var/tmp/user/$USERID/pulse /run/user/$USERID/pulse
endif

if allowed media
    bind /var/tmp/media /run/media
endif
if allowed docker
    try bind /var/tmp/docker/ /run/docker
    try bind /var/tmp/docker.pid /run/docker.pid
    try bind /var/tmp/docker.sock /run/docker.sock
endif

# only relevant if there is a VPN setup, but harmless otherwise
try bind /var/tmp/run/netns/iso-jail$JAILID /var/run/netns/

try umount /var/tmp
# overwrite /var/tmp making its content invisible
tmpfs /var/tmp

if allowed homedir
    # hide some stuff.
    # notice that the 'try' here is so 'tmpfs'
    # doesn't attempt to create a directory first.
    try tmpfs $HOME/shared/.config
    try tmpfs $HOME/shared/.local
    try tmpfs $HOME/shared/.cache
    try tmpfs $HOME/shared/.docker
    try tmpfs $HOME/shared/.gnupg
endif

# env vars

setEnv XDG_CONFIG_HOME=$HOME/config
setEnv XDG_DATA_HOME=$HOME/data
setEnv XDG_CONFIG_DIRS=$HOME/config:/etc/xdg

if denied git
    unsetEnv GIT_COMMITTER_NAME
    unsetEnv GIT_AUTHOR_NAME
    unsetEnv EMAIL
endif
unsetEnv PAM_KWALLETS_LOGIN
unsetEnv MAIL
unsetEnv SYSTEMD_EXEC_PID

if denied dbus
    unsetEnv DBUS_SESSION_BUS_ADDRESS
endif

if denied ssh
    unsetEnv SSH_AGENT
    unsetEnv SSH_AGENT_PID
    unsetEnv SSH_AUTH_SOCK
endif

tmpfs /var/log