Converting read-only initramfs-tools pre-mount script into regular live-boot script.

diff --git a/initramfs-tools/scripts/live-premount/readonly b/initramfs-tools/scripts/live-premount/readonly
deleted file mode 100755 (executable)
index 71483bd..0000000
--- a/initramfs-tools/scripts/live-premount/readonly
+++ /dev/null
@@ -1,35 +0,0 @@
-#!/bin/sh
-
-#set -e
-
-# initramfs-tools header
-
-PREREQ="udev"
-
-prereqs()
-{
-       echo "${PREREQ}"
-}
-
-case "${1}" in
-       prereqs)
-               prereqs
-               exit 0
-               ;;
-esac
-
-# live-boot script
-
-# make sure all harddisk devices are read-only
-# this is important for forensic investigations
-if grep -qe forensic -qe readonly /proc/cmdline
-then
-       for device in /dev/hd* /dev/sd* /dev/vd*
-       do
-               if [ -b "$device" ]
-               then
-                       printf " * Setting device %-9s to read-only mode: " $device >/dev/console
-                       blockdev --setro $device && printf "done [ execute \"blockdev --setrw %-9s\" to unlock]\n" $device >/dev/console || printf "failed\n" >/dev/console
-               fi
-       done
-fi

diff --git a/scripts/boot.sh b/scripts/boot.sh
index 5a64d70..eeaa4dc 100755 (executable)
--- a/scripts/boot.sh
+++ b/scripts/boot.sh
@@ -472,6 +472,14 @@ mountroot ()
 
        Arguments
 
+       # make sure all harddisk devices are read-only
+       # this is important for forensic investigations
+       case "${READ_ONLY}" in
+               true)
+                       Read_only
+                       ;;
+       esac
+
        maybe_break live-premount
        log_begin_msg "Running /scripts/live-premount"
        run_scripts /scripts/live-premount

diff --git a/scripts/boot/arguments.sh b/scripts/boot/arguments.sh
index 6b4e553..c526b9a 100755 (executable)
--- a/scripts/boot/arguments.sh
+++ b/scripts/boot/arguments.sh
@@ -10,6 +10,10 @@ Arguments ()
        for ARGUMENT in $(cat /proc/cmdline)
        do
                case "${ARGUMENT}" in
+                       read-only)
+                               READ_ONLY="true"
+                               ;;
+
                        skipconfig)
                                NOACCESSIBILITY="Yes"
                                NOFASTBOOT="Yes"

diff --git a/scripts/boot/read-only.sh b/scripts/boot/read-only.sh
new file mode 100755 (executable)
index 0000000..c8990df
--- /dev/null
+++ b/scripts/boot/read-only.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+#set -e
+
+Read_only ()
+{
+       # Marking the usual block devices for harddisks read-only
+       for _DEVICE in /dev/sd* /dev/vd*
+       do
+               if [ -b "${_DEVICE}" ]
+               then
+                       printf "Setting device %-9s to read-only mode:" ${_DEVICE} > /dev/console
+
+                       blockdev --setro ${_DEVICE} && printf " done [ execute \"blockdev --setrw %-9s\" to unlock]\n" ${_DEVICE} > /dev/console || printf "failed\n" > /dev/console
+               fi
+       done
+}