scripts/selinux/install_policy.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 set -e
   4 if [ `id -u` -ne 0 ]; then
   5         echo "$0: must be root to install the selinux policy"
   6         exit 1
   7 fi
   8
   9 SF=`which setfiles`
  10 if [ $? -eq 1 ]; then
  11         echo "Could not find setfiles"
  12         echo "Do you have policycoreutils installed?"
  13         exit 1
  14 fi
  15
  16 CP=`which checkpolicy`
  17 if [ $? -eq 1 ]; then
  18         echo "Could not find checkpolicy"
  19         echo "Do you have checkpolicy installed?"
  20         exit 1
  21 fi
  22 VERS=`$CP -V | awk '{print $1}'`
  23
  24 ENABLED=`which selinuxenabled`
  25 if [ $? -eq 1 ]; then
  26         echo "Could not find selinuxenabled"
  27         echo "Do you have libselinux-utils installed?"
  28         exit 1
  29 fi
  30
  31 if selinuxenabled; then
  32     echo "SELinux is already enabled"
  33     echo "This prevents safely relabeling all files."
  34     echo "Boot with selinux=0 on the kernel command-line."
  35     exit 1
  36 fi
  37
  38 cd mdp
  39 ./mdp -m policy.conf file_contexts
  40 $CP -U allow -M -o policy.$VERS policy.conf
  41
  42 mkdir -p /etc/selinux/dummy/policy
  43 mkdir -p /etc/selinux/dummy/contexts/files
  44
  45 echo "__default__:user_u:s0" > /etc/selinux/dummy/seusers
  46 echo "base_r:base_t:s0" > /etc/selinux/dummy/contexts/failsafe_context
  47 echo "base_r:base_t:s0 base_r:base_t:s0" > /etc/selinux/dummy/default_contexts
  48 cat > /etc/selinux/dummy/contexts/x_contexts <<EOF
  49 client * user_u:base_r:base_t:s0
  50 property * user_u:object_r:base_t:s0
  51 extension * user_u:object_r:base_t:s0
  52 selection * user_u:object_r:base_t:s0
  53 event * user_u:object_r:base_t:s0
  54 EOF
  55 touch /etc/selinux/dummy/contexts/virtual_domain_context
  56 touch /etc/selinux/dummy/contexts/virtual_image_context
  57
  58 cp file_contexts /etc/selinux/dummy/contexts/files
  59 cp dbus_contexts /etc/selinux/dummy/contexts
  60 cp policy.$VERS /etc/selinux/dummy/policy
  61 FC_FILE=/etc/selinux/dummy/contexts/files/file_contexts
  62
  63 if [ ! -d /etc/selinux ]; then
  64         mkdir -p /etc/selinux
  65 fi
  66 if [ -f /etc/selinux/config ]; then
  67     echo "/etc/selinux/config exists, moving to /etc/selinux/config.bak."
  68     mv /etc/selinux/config /etc/selinux/config.bak
  69 fi
  70 echo "Creating new /etc/selinux/config for dummy policy."
  71 cat > /etc/selinux/config << EOF
  72 SELINUX=permissive
  73 SELINUXTYPE=dummy
  74 EOF
  75
  76 cd /etc/selinux/dummy/contexts/files
  77 $SF -F file_contexts /
  78
  79 mounts=`cat /proc/$$/mounts | \
  80         grep -E "ext[234]|jfs|xfs|reiserfs|jffs2|gfs2|btrfs|f2fs|ocfs2" | \
  81         awk '{ print $2 '}`
  82 $SF -F file_contexts $mounts
  83
  84 echo "-F" > /.autorelabel