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Filename : nameservice
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# ------------------------------------------------------------------
#
#    Copyright (C) 2002-2009 Novell/SUSE
#    Copyright (C) 2009-2011 Canonical Ltd.
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#
# ------------------------------------------------------------------

  # Many programs wish to perform nameservice-like operations, such as
  # looking up users by name or id, groups by name or id, hosts by name
  # or IP, etc. These operations may be performed through files, dns,
  # NIS, NIS+, LDAP, hesiod, wins, etc. Allow them all here.
  /etc/group              r,
  /etc/host.conf          r,
  /etc/hosts              r,
  /etc/nsswitch.conf      r,
  /etc/gai.conf           r,
  /etc/passwd             r,
  /etc/protocols          r,

  # libtirpc (used for NIS/YP login) needs this
  /etc/netconfig r,

  # When using libnss-extrausers, the passwd and group files are merged from
  # an alternate path
  /var/lib/extrausers/group  r,
  /var/lib/extrausers/passwd r,

  # NSS records from systemd-userdbd.service
  /{,var/}run/systemd/userdb/ r,
  /{,var/}run/systemd/userdb/io.systemd.{NameServiceSwitch,Multiplexer,DynamicUser,Home} r,
  @{PROC}/sys/kernel/random/boot_id r,

  # When using sssd, the passwd and group files are stored in an alternate path
  # and the nss plugin also needs to talk to a pipe
  /var/lib/sss/mc/group   r,
  /var/lib/sss/mc/initgroups r,
  /var/lib/sss/mc/passwd  r,
  /var/lib/sss/pipes/nss  rw,

  /etc/resolv.conf        r,
  # On systems where /etc/resolv.conf is managed programmatically, it is
  # a symlink to /{,var/}run/(whatever program is managing it)/resolv.conf.
  /{,var/}run/{resolvconf,NetworkManager,systemd/resolve,connman,netconfig}/resolv.conf r,
  /etc/resolvconf/run/resolv.conf r,
  /{,var/}run/systemd/resolve/stub-resolv.conf r,

  /etc/samba/lmhosts      r,
  /etc/services           r,
  # db backend
  /var/lib/misc/*.db      r,
  # The Name Service Cache Daemon can cache lookups, sometimes leading
  # to vast speed increases when working with network-based lookups.
  /{,var/}run/.nscd_socket   rw,
  /{,var/}run/nscd/socket    rw,
  /{var/db,var/cache,var/lib,var/run,run}/nscd/{passwd,group,services,hosts}    r,
  # nscd renames and unlinks files in it's operation that clients will
  # have open
  /{,var/}run/nscd/db*  rmix,

  # The nss libraries are sometimes used in addition to PAM; make sure
  # they are available
  /{usr/,}lib{,32,64}/libnss_*.so*      mr,
  /{usr/,}lib/@{multiarch}/libnss_*.so*      mr,
  /etc/default/nss               r,

  # avahi-daemon is used for mdns4 resolution
  /{,var/}run/avahi-daemon/socket rw,

  # libnl-3-200 via libnss-gw-name
  @{PROC}/@{pid}/net/psched r,
  /etc/libnl-*/classid r,

  # nis
  #include <abstractions/nis>

  # ldap
  #include <abstractions/ldapclient>

  # winbind
  #include <abstractions/winbind>

  # likewise
  #include <abstractions/likewise>

  # mdnsd
  #include <abstractions/mdns>

  # kerberos
  #include <abstractions/kerberosclient>

  # resolve
  #
  # Allow access to the safe members of the systemd-resolved D-Bus API:
  #
  #   https://www.freedesktop.org/wiki/Software/systemd/resolved/
  #
  # This API may be used directly over the D-Bus system bus or it may be used
  # indirectly via the nss-resolve plugin:
  #
  #   https://www.freedesktop.org/software/systemd/man/nss-resolve.html
  #
  #include <abstractions/dbus-strict>
  dbus send
       bus=system
       path="/org/freedesktop/resolve1"
       interface="org.freedesktop.resolve1.Manager"
       member="Resolve{Address,Hostname,Record,Service}"
       peer=(name="org.freedesktop.resolve1"),

  # libnss-systemd
  #
  #   https://systemd.io/USER_GROUP_API/
  #   https://systemd.io/USER_RECORD/
  #   https://www.freedesktop.org/software/systemd/man/nss-systemd.html
  #
  # Allow User/Group lookups via common VarLink socket APIs. Applications need
  # to either consult all of them or the io.systemd.Multiplexer frontend.
  /run/systemd/userdb/ r,
  /run/systemd/userdb/io.systemd.Multiplexer rw,
  /run/systemd/userdb/io.systemd.DynamicUser rw,        # systemd-exec users
  /run/systemd/userdb/io.systemd.Home rw,               # systemd-home dirs
  /run/systemd/userdb/io.systemd.NameServiceSwitch rw,  # UNIX/glibc NSS

  # Also allow lookups for systemd-exec's DynamicUsers via D-Bus
  #   https://www.freedesktop.org/software/systemd/man/systemd.exec.html
  dbus send
       bus=system
       path="/org/freedesktop/systemd1"
       interface="org.freedesktop.systemd1.Manager"
       member="{GetDynamicUsers,LookupDynamicUserByName,LookupDynamicUserByUID}"
       peer=(name="org.freedesktop.systemd1"),

  # TCP/UDP network access
  network inet  stream,
  network inet6 stream,
  network inet  dgram,
  network inet6 dgram,

  # TODO: adjust when support finer-grained netlink rules
  # Netlink raw needed for nscd
  network netlink raw,

  # interface details
  @{PROC}/@{pid}/net/route r,