# apparmor.d - Full set of apparmor profiles
# Copyright (C) 2019-2021 Mikhail Morfikov
# SPDX-License-Identifier: GPL-2.0-only

abi <abi/3.0>,

include <tunables/global>

@{exec_path} = /{usr/,}sbin/usermod
profile usermod @{exec_path} flags=(attach_disconnected) {
  include <abstractions/base>
  include <abstractions/consoles>
  include <abstractions/nameservice-strict>

  # To write records to the kernel auditing log.
  capability audit_write,

  # To set the right permission to the files in the /etc/ dir.
  capability chown,
  capability fsetid,

  # To read user home files and change their user/group.
  #  usermod: Failed to change ownership of the home directory
  capability dac_read_search,

  # To move user home files to a new location.
  capability fowner,

  # To prevent removing a user when it's used by some process.
  capability sys_ptrace,
  ptrace (read),

  network netlink raw,

  @{exec_path} mr,

  /etc/login.defs r,

  /etc/{passwd,shadow,gshadow,group} rw,
  /etc/{passwd,shadow,gshadow,group}.@{pid} w,
  /etc/{passwd,shadow,gshadow,group}- w,
  /etc/{passwd,shadow,gshadow,group}+ rw,

  /etc/passwd.lock  wl -> /etc/passwd.@{pid},
  /etc/group.lock   wl -> /etc/group.@{pid},
  /etc/shadow.lock  wl -> /etc/shadow.@{pid},
  /etc/gshadow.lock wl -> /etc/gshadow.@{pid},

  # A process first uses lckpwdf() to lock the lock file, thereby gaining exclusive rights to
  # modify the /etc/passwd or /etc/shadow password database.
  /etc/.pwd.lock rwk,

  /etc/subuid r,

  @{PROC}/ r,
  @{PROC}/@{pids}/task/ r,

  # To create and move user dirs
  @{HOME}/{,**} rw,
  /var/{,**}    rw,

  include if exists <local/usermod>
}