Bug#13741677 MYSQL_SECURE_INSTALLATION DOES NOT

             WORK + SAVES ROOT PASSWORD TO DISK!

The secure installation scripts connect to the
server by storing the password in a temporary
option file. Now, if the script gets killed or
fails for some reason, the removal of the option
file may not take place.

This patch introduces following enhancements :
* (.sh) Made sure that cleanup happens at every
  call to 'exit 1'. This is performed implicitly
  by END{} in pl.in.
* (.pl.in) Added a warning in case unlink fails
  to delete the option/query files.
* (.sh/.pl.in) Added more signals to the signal
  handler list. SIG# 1, 3, 6, 15

scripts/mysql_secure_installation.pl.in

 #!/usr/bin/perl
 # -*- cperl -*-
 #
-# Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
 #
 # 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
@@ -28,7 +28,7 @@ my $mysql;  # How to call the mysql client
 my $rootpass = "";
 
 
-$SIG{QUIT} = $SIG{INT} = sub {
+$SIG{QUIT} = $SIG{INT} = $SIG{TERM} = $SIG{ABRT} = $SIG{HUP} = sub {
   print "\nAborting!\n\n";
   echo_on();
   cleanup();
@@ -242,7 +242,11 @@ sub reload_privilege_tables {
 }
 
 sub cleanup {
-  unlink($config,$command);
+  print "Cleaning up...\n";
+
+  foreach my $file ($config, $command) {
+    unlink $file or warn "Warning: Could not unlink $file: $!\n";
+  }
 }
 
 

scripts/mysql_secure_installation.sh

 #!/bin/sh
 
-# Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved.
 # 
 # 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
@@ -19,7 +19,7 @@ config=".my.cnf.$$"
 command=".mysql.$$"
 mysql_client=""
 
-trap "interrupt" 2
+trap "interrupt" 1 2 3 6 15
 
 rootpass=""
 echo_n=
@@ -139,13 +139,16 @@ set_root_password() {
     if [ $? -eq 0 ]; then
 	echo "Password updated successfully!"
 	echo "Reloading privilege tables.."
-	reload_privilege_tables || exit 1
+	reload_privilege_tables
+	if [ $? -eq 1 ]; then
+		clean_and_exit
+	fi
 	echo
 	rootpass=$password1
 	make_config
     else
 	echo "Password update failed!"
-	exit 1
+	clean_and_exit
     fi
 
     return 0
@@ -157,7 +160,7 @@ remove_anonymous_users() {
 	echo " ... Success!"
     else
 	echo " ... Failed!"
-	exit 1
+	clean_and_exit
     fi
 
     return 0
@@ -217,6 +220,11 @@ cleanup() {
     rm -f $config $command
 }
 
+# Remove the files before exiting.
+clean_and_exit() {
+	cleanup
+	exit 1
+}
 
 # The actual script starts here