#
# Simplify creation of directories
#
# FHS does not specify permissions anywhere I could find so I'm using
# what it looks like my system has setup.
#
function  fhs_mkdir()
{
  install  -d  -o ${3:-root}  -g ${4:-root}  -m ${2:-0755}  $INSTALL_ROOT/$1
}

#
# Root account is always needed, bin user/group is provided by iso and an unknown
# number of spells need it.
# Note: We assume that the currently active system has existing /etc/passwd.
#
create_account root &&
create_account bin  &&

#
# http://www.pathname.com/fhs/2.2/fhs-3.html
#
for  root_directory  in  bin  etc  boot  dev  home  lib  mnt  opt  sbin  \
                         usr  var
do
  fhs_mkdir  /$root_directory
done  &&

fhs_mkdir /tmp 1777  &&

#
# For a chroot, we need minimal passwd files with root account once we enter it.
# without existing passwd, not even `useradd root` will work!
#
if ! [[ -e "$INSTALL_ROOT/etc/passwd" ]]; then
  echo 'root:!:0:0:root:/root:/bin/bash' > "$INSTALL_ROOT/etc/passwd"
fi &&
if ! [[ -e "$INSTALL_ROOT/etc/group" ]]; then
  echo 'root:!:0:' > "$INSTALL_ROOT/etc/group"
fi &&

#
# http://www.pathname.com/fhs/2.2/fhs-6.1.html
# in the linux specific section, /proc is indeed mentioned
#
fhs_mkdir /proc &&

#
# http://www.pathname.com/fhs/2.2/fhs-3.7.html
#
for  etc_directory  in  opt  X11  sgml
do
  fhs_mkdir  /etc/$etc_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-3.9.html
#
for  lib_directory  in  modules
do
  fhs_mkdir  /lib/$lib_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-4.html
#
for  usr_directory  in  bin  include  lib  local  sbin  share  src
do
  fhs_mkdir  /usr/$usr_directory
done  &&

#
# For games
#
create_group  games  &&
fhs_mkdir  /usr/games  0750  root  games  &&

#
# http://www.pathname.com/fhs/2.2/fhs-4.6.html
#
for  include_directory  in  bsd
do
  fhs_mkdir  /usr/include/$include_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-4.9.html
#
for  local_directory  in  bin  games  include  lib  man  sbin  share  src
do
  fhs_mkdir  /usr/local/$local_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-4.11.html
#
for  share_directory  in  dict  doc  games  info  locale  man  misc  nls  \
                          sgml  terminfo  tmac  zoneinfo
do
  fhs_mkdir  /usr/share/$share_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-4.11.html (4.11.5.2)
#
for  man_directory in 1 2 3 4 5 6 7 8
do
  fhs_mkdir  /usr/share/man/man$man_directory
done  &&

for  X11_directory  in  bin  lib/X11  include/X11
do
  fhs_mkdir  /usr/$X11_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-5.html
#
for  var_directory  in  account  cache  crash  games  lib  lock  log  \
                        opt  run  spool  yp
do
  fhs_mkdir  /var/$var_directory
done  &&

#
# This is the permission set I have on mine
#
fhs_mkdir /var/tmp  1777  &&

#
# http://www.pathname.com/fhs/2.2/fhs-5.5.html
#
for  cache_directory  in  fonts  man  www
do
  fhs_mkdir  /var/cache/$cache_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-5.14.html
#
for  spool_directory  in  lpd  mqueue  news  rwho  uucp
do
  fhs_mkdir  /var/spool/$spool_directory
done  &&

create_group mail &&
fhs_mkdir  /var/spool/mail  3775 root mail &&

#
# http://www.pathname.com/fhs/2.2/fhs-5.11.html
#
pushd  $INSTALL_ROOT/var      &&
if  [  !  -e  mail  ];  then
  ln  -sf  spool/mail         \
           mail
fi                            &&
popd                          &&

#
# http://www.pathname.com/fhs/2.2/fhs-5.8.html
#
for  varlib_directory  in  hwclock  misc  xdm
do
  fhs_mkdir  /var/lib/$varlib_directory
done  &&

#
# http://www.pathname.com/fhs/2.2/fhs-3.13.html
#
# Doesn't mention permissions, but usually you don't want other users
# able to access a different users folders, so why would root be different?
#
if ! exists_account root; then
  fhs_mkdir  root  0750
fi &&

create_group  utmp  &&

for  file  in  /var/run/utmp  /var/log/wtmp
do
  if  test  !  -e  $file; then
    touch  $file
  fi  &&
  chmod  664   $file  &&
  chgrp  utmp  $file
done