- Grub shell workaroundovi (divertovi) za ExecShield (grub i grub-probe)

diff --git a/debian/changelog b/debian/changelog
index e562dcb..22f3afb 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+kernel-2.6-cn (3:2.6.26-3) stable; urgency=low
+
+  * Grub shell workaroundovi (divertovi) za ExecShield (grub i grub-probe)
+
+ -- Dinko Korunic <kreator@carnet.hr>  Wed, 03 Jun 2009 13:19:06 +0200
+
 kernel-2.6-cn (3:2.6.26-2) stable; urgency=low
 
   * niz manjih izmjena u postinst rutinama za bolju detekciju root/boot

diff --git a/debian/install b/debian/install
index 07aa51a..60485e3 100644 (file)
--- a/debian/install
+++ b/debian/install
@@ -1 +1,3 @@
 grub-functions.sh usr/share/kernel-2.6-cn
+grub usr/sbin
+grub-probe usr/sbin

diff --git a/debian/postinst b/debian/postinst
index 093c613..3b3d622 100755 (executable)
--- a/debian/postinst
+++ b/debian/postinst
@@ -134,21 +134,24 @@ fi
 echo -n " grub2"
 
 # workaround grsec
-if [ -x /sbin/chpax ]; then
-    if [ -x /usr/sbin/grub ]; then
-        chpax -spmrx /usr/sbin/grub || true
+if uname -a | grep -q grsec; then
+    if [ -x /sbin/chpax ]; then
+        # grub
+        if [ -x /usr/sbin/grub.real ]; then
+            chpax -spmrx /usr/sbin/grub.real >/dev/null 2>&1 || true
+        elif [ -x /usr/sbin/grub ]; then
+            chpax -spmrx /usr/sbin/grub >/dev/null 2>&1 || true
+        fi
+
+        # grub-probe
+        if [ -x /usr/sbin/grub-probe.real ]; then
+            chpax -spmrx /usr/sbin/grub-probe.real >/dev/null 2>&1 || true
+        elif [ -x /usr/sbin/grub-probe ]; then
+            chpax -spmrx /usr/sbin/grub-probe >/dev/null 2>&1 || true
+        fi
+
+        echo -n " grsec"
     fi
-    if [ -x /usr/sbin/grub-probe ]; then
-        chpax -spmrx /usr/sbin/grub-probe || true
-    fi
-fi
-echo -n " grub3"
-
-# workaround execshield
-SHIELD=$(sysctl -e -n kernel.exec-shield)
-if [ ! -z "$SHIELD" ]; then
-    sysctl -e -w kernel.exec-shield=0 >/dev/null 2>&1
-    echo -n " execshield1"
 fi
 
 # remove obsolete devfs/compat links and restore normal udev behaviour
@@ -176,7 +179,7 @@ if [ ! -s "$device_map" ]; then
 else
     rm -f "$device_map.old"
 fi
-echo -n " grub4"
+echo -n " grub3"
 
 # import GRUB helper functions (again, updated device map)
 . /usr/share/kernel-2.6-cn/grub-functions.sh
@@ -205,7 +208,7 @@ if [ -h "$install_device" ]; then
             || true
     fi
 fi
-echo -n " grub5"
+echo -n " grub4"
 
 # install GRUB loader
 if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
@@ -214,7 +217,7 @@ if ! grub-install --no-floppy "$install_device" >/dev/null 2>&1; then
     echo "CN: Do not reboot your server and report this to OTRS immediately!"
     exit 1
 fi
-echo -n " grub6"
+echo -n " grub5"
 
 # fix possible wrong params in menu.lst
 cp_check_and_sed '^# groot=' \
@@ -224,7 +227,7 @@ cp_check_and_sed '^# kopt=' \
   "s;^# kopt=\(.*\)root=[^[:space:]]*\(.*\);# kopt=\1root=$root_device\2;g" \
       "$menu_file" || true
 /usr/sbin/update-grub >/dev/null 2>&1 || true
-echo -n " grub7"
+echo -n " grub6"
 
 # and final stage of devfs/udev brokeness fix
 if [ "x$install_device_resolved" != "x$install_device" ]; then
@@ -249,13 +252,7 @@ if [ "x$install_device_resolved" != "x$install_device" ]; then
       "s;\(^kernel.*\)root=[^[:space:]]*\(.*\);\1root=$root_device\2;g" \
           "$menu_file" || true
 fi
-echo -n " grub8"
-
-# restore execshield state
-if [ ! -z "$SHIELD" ]; then
-    sysctl -e -w "kernel.exec-shield=$SHIELD" >/dev/null 2>&1
-    echo -n " execshield2"
-fi
+echo -n " grub7"
 
 # disable lilo
 if [ -e /etc/lilo.conf ]; then

diff --git a/debian/postrm b/debian/postrm
index 5c733a3..13374b3 100755 (executable)
--- a/debian/postrm
+++ b/debian/postrm
@@ -47,6 +47,18 @@ echo -n " modules"
 
 echo "."
 
+################################################################################
+
+DIVERT_TO="grub grub-probe"
+
+echo -n "CN: Undiverting binaries:"
+for i in $DIVERT_TO; do
+    dpkg-divert --remove --rename --package 'kernel-2.6-cn' \
+        --divert /usr/sbin/$i.real /usr/sbin/$i >/dev/null
+    echo -n " $i"
+done
+echo "."
+
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.
 

diff --git a/debian/preinst b/debian/preinst
index 6cc6e1f..cef0916 100755 (executable)
--- a/debian/preinst
+++ b/debian/preinst
@@ -29,9 +29,22 @@ esac
 
 # make GRUB template directory
 if [ ! -d /boot/grub ]; then
+    echo "CN: Made /boot/grub directory."
     mkdir -p /boot/grub
 fi
 
+################################################################################
+
+DIVERT_TO="grub grub-probe"
+
+echo -n "CN: Diverting binaries:"
+for i in $DIVERT_TO; do
+    dpkg-divert --add --rename --package 'kernel-2.6-cn' \
+        --divert /usr/sbin/$i.real /usr/sbin/$i >/dev/null
+    echo -n " $i"
+done
+echo "."
+
 # dh_installdeb will replace this with shell code automatically
 # generated by other debhelper scripts.
 

diff --git a/grub b/grub
new file mode 100755 (executable)
index 0000000..b5fbe31
--- /dev/null
+++ b/grub
@@ -0,0 +1,26 @@
+#!/bin/sh
+# Grub shell ExecShield wrapper
+#
+# Copyright (C) 2009  Dinko Korunic, CARNet, Grupa za izradu paketa
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
+
+SHIELD=$(sysctl -e -n kernel.exec-shield)
+_retval=0
+
+if [ ! -z "$SHIELD" ]; then
+    sysctl -e -w kernel.exec-shield=0 >/dev/null 2>&1 || true
+fi
+
+if [ -x "$0.real" ]; then
+    "$0.real" $@ || _retval=$?
+fi
+
+if [ ! -z "$SHIELD" ]; then
+    sysctl -e -w "kernel.exec-shield=$SHIELD" >/dev/null 2>&1 || true
+fi
+
+exit $_retval

diff --git a/grub-probe b/grub-probe
new file mode 120000 (symlink)
index 0000000..2c8276e
--- /dev/null
+++ b/grub-probe
@@ -0,0 +1 @@
+grub
\ No newline at end of file