#**************************************************************
#  
#  Licensed to the Apache Software Foundation (ASF) under one
#  or more contributor license agreements.  See the NOTICE file
#  distributed with this work for additional information
#  regarding copyright ownership.  The ASF licenses this file
#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#  
#    http://www.apache.org/licenses/LICENSE-2.0
#  
#  Unless required by applicable law or agreed to in writing,
#  software distributed under the License is distributed on an
#  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
#  KIND, either express or implied.  See the License for the
#  specific language governing permissions and limitations
#  under the License.
#  
#**************************************************************



package installer::systemactions;

use Cwd;
use File::Copy;
use installer::converter;
use installer::exiter;
use installer::globals;
use installer::pathanalyzer;
use installer::remover;

######################################################
# Creating a new direcotory
######################################################

sub create_directory
{
	my ($directory) = @_;
		
	my $returnvalue = 1;
	my $infoline = "";

	if (!(-d $directory))
	{
		$returnvalue = mkdir($directory, 0775);

		if ($returnvalue)
		{
			$infoline = "\nCreated directory: $directory\n";
			push(@installer::globals::logfileinfo, $infoline);
	
			my $localcall = "chmod 0775 $directory \>\/dev\/null 2\>\&1";
			system($localcall);

			# chmod 0775 is not sufficient on mac to remove sticky tag
			$localcall = "chmod a-s $directory \>\/dev\/null 2\>\&1";
			system($localcall);			
		}
		else
		{
			# New solution in parallel packing: It is possible, that the directory now exists, although it
			# was not created in this process. There is only an important error, if the directory does not
			# exist now. 

			$infoline = "\nDid not succeed in creating directory: \"$directory\". Further attempts will follow.\n";
			push(@installer::globals::logfileinfo, $infoline);
			
			if (!(-d $directory))
			{
				# Problem with parallel packaging? -> Try a little harder, before exiting.
				# Did someone else remove the parent directory in the meantime?
				my $parentdir = $directory;
				installer::pathanalyzer::get_path_from_fullqualifiedname(\$parentdir);
				if (!(-d $parentdir))
				{
					$returnvalue = mkdir($parentdir, 0775);

					if ($returnvalue)
					{
						$infoline = "\nAttention: Successfully created parent directory (should already be created before): $parentdir\n";
						push(@installer::globals::logfileinfo, $infoline);
	
						my $localcall = "chmod 775 $parentdir \>\/dev\/null 2\>\&1";
						system($localcall);
					}
					else
					{
						$infoline = "\Error: \"$directory\" could not be created. Even the parent directory \"$parentdir\" does not exist and could not be created.\n";
						push(@installer::globals::logfileinfo, $infoline);
						if ( -d $parentdir )
						{
							$infoline = "\nAttention: Finally the parent directory \"$parentdir\" exists, but I could not create it.\n";
							push(@installer::globals::logfileinfo, $infoline);
						}
						else
						{
							# Now it is time to exit, even the parent could not be created.
							installer::exiter::exit_program("ERROR: Could not create parent directory \"$parentdir\"", "create_directory");
						}
					}		
				}
			
				# At this point we have to assume, that the parent directory exist.
				# Trying once more to create the desired directory

				$returnvalue = mkdir($directory, 0775);

				if ($returnvalue)
				{
					$infoline = "\nAttention: Created directory \"$directory\" in the second try.\n";
					push(@installer::globals::logfileinfo, $infoline);
	
					my $localcall = "chmod 775 $directory \>\/dev\/null 2\>\&1";
					system($localcall);
				}
				else
				{
					if ( -d $directory )
					{
						$infoline = "\nAttention: Finally the directory \"$directory\" exists, but I could not create it.\n";
						push(@installer::globals::logfileinfo, $infoline);
					}
					else
					{
						# It is time to exit, even the second try failed.
						installer::exiter::exit_program("ERROR: Failed to create the directory: $directory", "create_directory");
					}	
				}				
			}
			else
			{
				$infoline = "\nAnother process created this directory in exactly this moment :-) : $directory\n";
				push(@installer::globals::logfileinfo, $infoline);
			}
		}
	}
	else
	{
		$infoline = "\nAlready existing directory, did not create: $directory\n";
		push(@installer::globals::logfileinfo, $infoline);
	}
}

######################################################
# Creating a new direcotory with defined privileges
######################################################

sub create_directory_with_privileges
{
	my ($directory, $privileges) = @_;
		
	my $returnvalue = 1;
	my $infoline = "";

	if (!(-d $directory))
	{
		my $localprivileges = oct("0".$privileges); # changes "777" to 0777
		$returnvalue = mkdir($directory, $localprivileges);

		if ($returnvalue)
		{
			$infoline = "\nCreated directory: $directory\n";
			push(@installer::globals::logfileinfo, $infoline);
	
			my $localcall = "chmod $privileges $directory \>\/dev\/null 2\>\&1";
			system($localcall);
		}
		else
		{
			# New solution in parallel packing: It is possible, that the directory now exists, although it
			# was not created in this process. There is only an important error, if the directory does not
			# exist now. 

			$infoline = "\nDid not succeed in creating directory: \"$directory\". Further attempts will follow.\n";
			push(@installer::globals::logfileinfo, $infoline);
			
			if (!(-d $directory))
			{
				# Problem with parallel packaging? -> Try a little harder, before exiting.
				# Did someone else remove the parent directory in the meantime?
				my $parentdir = $directory;
				installer::pathanalyzer::get_path_from_fullqualifiedname(\$parentdir);
				if (!(-d $parentdir))
				{
					$returnvalue = mkdir($directory, $localprivileges);

					if ($returnvalue)
					{
						$infoline = "\nAttention: Successfully created parent directory (should already be created before): $parentdir\n";
						push(@installer::globals::logfileinfo, $infoline);
	
						my $localcall = "chmod $privileges $parentdir \>\/dev\/null 2\>\&1";
						system($localcall);
					}
					else
					{
						$infoline = "\Error: \"$directory\" could not be created. Even the parent directory \"$parentdir\" does not exist and could not be created.\n";
						push(@installer::globals::logfileinfo, $infoline);
						if ( -d $parentdir )
						{
							$infoline = "\nAttention: Finally the parent directory \"$parentdir\" exists, but I could not create it.\n";
							push(@installer::globals::logfileinfo, $infoline);
						}
						else
						{
							# Now it is time to exit, even the parent could not be created.
							installer::exiter::exit_program("ERROR: Could not create parent directory \"$parentdir\"", "create_directory_with_privileges");
						}
					}		
				}
			
				# At this point we have to assume, that the parent directory exist.
				# Trying once more to create the desired directory

				$returnvalue = mkdir($directory, $localprivileges);

				if ($returnvalue)
				{
					$infoline = "\nAttention: Created directory \"$directory\" in the second try.\n";
					push(@installer::globals::logfileinfo, $infoline);
	
					my $localcall = "chmod $privileges $directory \>\/dev\/null 2\>\&1";
					system($localcall);
				}
				else
				{
					if ( -d $directory )
					{
						$infoline = "\nAttention: Finally the directory \"$directory\" exists, but I could not create it.\n";
						push(@installer::globals::logfileinfo, $infoline);
					}
					else
					{
						# It is time to exit, even the second try failed.
						installer::exiter::exit_program("ERROR: Failed to create the directory: $directory", "create_directory_with_privileges");
					}	
				}				
			}
			else
			{
				$infoline = "\nAnother process created this directory in exactly this moment :-) : $directory\n";
				push(@installer::globals::logfileinfo, $infoline);
			}
		}
	}
	else
	{
		$infoline = "\nAlready existing directory, did not create: $directory\n";
		push(@installer::globals::logfileinfo, $infoline);

		my $localcall = "chmod $privileges $directory \>\/dev\/null 2\>\&1";
		system($localcall);
	}
}

######################################################
# Removing a new direcotory
######################################################

sub remove_empty_directory
{
	my ($directory) = @_;

	my $returnvalue = 1;

	if (-d $directory)
	{		
		my $systemcall = "rmdir $directory";
	
		$returnvalue = system($systemcall);

		my $infoline = "Systemcall: $systemcall\n";
		push( @installer::globals::logfileinfo, $infoline);
		
		if ($returnvalue)
		{
			$infoline = "ERROR: Could not remove \"$directory\"!\n";
			push( @installer::globals::logfileinfo, $infoline);
		}
		else
		{
			$infoline = "Success: Removed \"$directory\"!\n";
			push( @installer::globals::logfileinfo, $infoline);
		}
	}
}

#######################################################################
# Calculating the number of languages in the string
#######################################################################

sub get_number_of_langs
{
	my ($languagestring) = @_;

	my $number = 1;
	
	my $workstring = $languagestring;
	
	while ( $workstring =~ /^\s*(.*)_(.*?)\s*$/ )
	{
		$workstring = $1;
		$number++;
	}

	return $number;
}

#######################################################################
# Creating the directories, in which files are generated or unzipped
#######################################################################

sub create_directories
{
	my ($newdirectory, $languagesref) =@_;
	
	$installer::globals::unpackpath =~ s/\Q$installer::globals::separator\E\s*$//;	# removing ending slashes and backslashes

	my $path = "";

	if (( $newdirectory eq "uno" ) || ( $newdirectory eq "zip" ) || ( $newdirectory eq "cab" ) || ( $newdirectory =~ /rdb\s*$/i )) # special handling for zip files, cab files and services file because of performance reasons
	{
		if ( $installer::globals::temppathdefined ) { $path = $installer::globals::temppath; }
		else { $path = $installer::globals::unpackpath; }
		$path =~ s/\Q$installer::globals::separator\E\s*$//;	# removing ending slashes and backslashes
		$path = $path . $installer::globals::separator;
	}
	elsif ( ( $newdirectory eq "jds" ) )
	{
		if ( $installer::globals::jdstemppathdefined ) { $path = $installer::globals::jdstemppath; }
		else { $path = $installer::globals::unpackpath; }
		$path =~ s/\Q$installer::globals::separator\E\s*$//;	# removing ending slashes and backslashes
		$path = $path . $installer::globals::separator;
		installer::systemactions::create_directory($path);
	}
	else
	{
		$path = $installer::globals::unpackpath . $installer::globals::separator;
		
		# special handling, if LOCALINSTALLDIR is set
		if (( $installer::globals::localinstalldirset ) && ( $newdirectory eq "install" ))
		{
			$installer::globals::localinstalldir =~ s/\Q$installer::globals::separator\E\s*$//;
			$path = $installer::globals::localinstalldir . $installer::globals::separator;
		}
	}

	$infoline = "create_directories: Using $path for $newdirectory !\n";
	push( @installer::globals::logfileinfo, $infoline);

	if ($newdirectory eq "unzip" )	# special handling for common directory
	{
		$path = $path  . ".." . $installer::globals::separator . "common" . $installer::globals::productextension . $installer::globals::separator;
		create_directory($path);

		$path = $path . $newdirectory . $installer::globals::separator;
		create_directory($path);
	}
	else
	{
		my $localproductname = $installer::globals::product;
		my $localproductsubdir = "";

		if ( $installer::globals::product =~ /^\s*(.+?)\_\_(.+?)\s*$/ )
		{
			$localproductname = $1;
			$localproductsubdir = $2;
		}

		if ( $installer::globals::languagepack ) { $path = $path . $localproductname . "_languagepack" . $installer::globals::separator; }
		elsif ( $installer::globals::patch ) { $path = $path . $localproductname . "_patch" . $installer::globals::separator; }
		else { $path = $path . $localproductname . $installer::globals::separator; }

		create_directory($path);

		if ( $localproductsubdir )
		{
			$path = $path . $localproductsubdir . $installer::globals::separator;
			create_directory($path);
		}

		$path = $path . $installer::globals::installertypedir . $installer::globals::separator;
		create_directory($path);

		$path = $path . $newdirectory . $installer::globals::separator;
		create_directory($path);
		
		my $locallanguagesref = "";
		
		if ( $$languagesref ) { $locallanguagesref = $$languagesref; }

		if (!($locallanguagesref eq "" ))	# this will be a path like "01_49", for Profiles and ConfigurationFiles, idt-Files
		{
			my $languagestring = $$languagesref;

			if (length($languagestring) > $installer::globals::max_lang_length )
			{
				my $number_of_languages = get_number_of_langs($languagestring);
				chomp(my $shorter = `echo $languagestring | md5sum | sed -e "s/ .*//g"`);
				# $languagestring = $shorter;
				my $id = substr($shorter, 0, 8); # taking only the first 8 digits
				$languagestring = "lang_" . $number_of_languages . "_id_" . $id;				
			}

			$path = $path . $languagestring  . $installer::globals::separator;
			create_directory($path);
		}
	}
	
	installer::remover::remove_ending_pathseparator(\$path);

	$path = installer::converter::make_path_conform($path);
	
	return $path;
}

########################
# Copying one file
########################

sub copy_one_file
{
	my ($source, $dest) = @_;

	my ($returnvalue, $infoline);
	

	# copy returns 0 if files are identical :-(
	if ( $installer::globals::isos2 ) {
		unlink($dest);
	}

	my $copyreturn = copy($source, $dest);
		
	if ($copyreturn)
	{
		$infoline = "Copy: $source to $dest\n";
		$returnvalue = 1;
	}
	else
	{
		$infoline = "ERROR: Could not copy $source to $dest\n";
		$returnvalue = 0;
	}

	push(@installer::globals::logfileinfo, $infoline);

    if ( !$returnvalue ) {
        return $returnvalue;
    }
    
    # taking care of file attributes
    if ($installer::globals::iswin && -f $dest) {
        my $mode = -x $source ? 0775 : 0664;
        my $mode_str = sprintf("%o", $mode);
        my $chmodreturn = chmod($mode, $dest);
    	if ($chmodreturn)
    	{
    		$infoline = "chmod $mode_str, $dest\n";
    		$returnvalue = 1;
    	}
    	else
    	{
    		$infoline = "WARNING: Could not chmod $dest: $!\n";
    		$returnvalue = 0;
    	}
	
	    push(@installer::globals::logfileinfo, $infoline);
    }
	
	return $returnvalue;
}

##########################
# Hard linking one file
##########################

sub hardlink_one_file
{
	my ($source, $dest) = @_;

	my ($returnvalue, $infoline);
	
	my $copyreturn = link($source, $dest);
		
	if ($copyreturn)
	{
		$infoline = "Link: $source to $dest\n";
		$returnvalue = 1;
	}
	else
	{
		$infoline = "ERROR: Could not link $source to $dest\n";
		$returnvalue = 0;
	}

	push(@installer::globals::logfileinfo, $infoline);
    
	return $returnvalue;
}

##########################
# Soft linking one file
##########################

sub softlink_one_file
{
	my ($source, $dest) = @_;

	my ($returnvalue, $infoline);
	
	my $linkreturn = symlink($source, $dest);
		
	if ($linkreturn)
	{
		$infoline = "Symlink: $source to $dest\n";
		$returnvalue = 1;
	}
	else
	{
		$infoline = "ERROR: Could not symlink $source to $dest\n";
		$returnvalue = 0;
	}

	push(@installer::globals::logfileinfo, $infoline);
    
	return $returnvalue;
}

########################
# Renaming one file
########################

sub rename_one_file
{
	my ($source, $dest) = @_;

	my ($returnvalue, $infoline);

	my $renamereturn = rename($source, $dest);
		
	if ($renamereturn)
	{
		$infoline = "Rename: $source to $dest\n";
		$returnvalue = 1;
	}
	else
	{
		$infoline = "ERROR: Could not rename $source to $dest\n";
		$returnvalue = 0;
	}
	
	push(@installer::globals::logfileinfo, $infoline);
	
	return $returnvalue;
}

##########################################
# Copying all files from one directory
# to another directory
##########################################

sub copy_directory
{
	my ($sourcedir, $destdir) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Copying files from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			my $sourcefile = $sourcedir . $installer::globals::separator . $onefile;
			my $destfile = $destdir . $installer::globals::separator . $onefile;
			if ( -f $sourcefile ) 	# only files, no directories
			{
				copy_one_file($sourcefile, $destfile);
			}
		}
	}
}

##########################################
# Copying all files from one directory
# to another directory
##########################################

sub is_empty_dir
{
	my ($dir) = @_;
	
	my $directory_is_empty = 1;
	my @sourcefiles = ();
	
	opendir(DIR, $dir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	my @realcontent = ();
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			push(@realcontent, $onefile);
		}
	}
	
	if ( $#realcontent > -1 ) { $directory_is_empty = 0; }
	
	return $directory_is_empty;
}

#####################################################################
# Creating hard links to a complete directory with sub directories.
#####################################################################

sub hardlink_complete_directory
{
	my ($sourcedir, $destdir) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( ! -d $destdir ) { create_directory($destdir); }

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Creating hard links for all files from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			my $source = $sourcedir . $installer::globals::separator . $onefile;
			my $dest = $destdir . $installer::globals::separator . $onefile;
			if ( -f $source ) 	# only files, no directories
			{
				hardlink_one_file($source, $dest);
			}
			if ( -d $source ) 	# recursive
			{
				hardlink_complete_directory($source, $dest);
			}
		}
	}	
}

#####################################################################
# Creating hard links to a complete directory with sub directories.
#####################################################################

sub softlink_complete_directory
{
	my ($sourcedir, $destdir, $depth) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( ! -d $destdir ) { create_directory($destdir); }

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Creating soft links for all files from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			my $source = $sourcedir . $installer::globals::separator . $onefile;
			my $dest = $destdir . $installer::globals::separator . $onefile;
			if ( -f $source ) 	# only files, no directories
			{
				my $localsource = $source;
				if ( $depth > 0 ) { for ( my $i = 1; $i <= $depth; $i++ ) { $localsource = "../" . $localsource; } }
				softlink_one_file($localsource, $dest);
			}
			if ( -d $source ) 	# recursive
			{
				my $newdepth = $depth + 1;
				softlink_complete_directory($source, $dest, $newdepth);
			}
		}
	}	
}

#####################################################
# Copying a complete directory with sub directories.
#####################################################

sub copy_complete_directory
{
	my ($sourcedir, $destdir) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( ! -d $destdir ) { create_directory($destdir); }

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Copying files from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			my $source = $sourcedir . $installer::globals::separator . $onefile;
			my $dest = $destdir . $installer::globals::separator . $onefile;
			if ( -f $source ) 	# only files, no directories
			{
				copy_one_file($source, $dest);
			}
			if ( -d $source ) 	# recursive
			{
				if ((!( $source =~ /packages\/SUNW/ )) && (!( $source =~ /packages\/OOO/ )))	# do not copy complete Solaris packages!
				{
					copy_complete_directory($source, $dest);
				}
			}
		}
	}	
}

#####################################################################################
# Copying a complete directory with sub directories, but not the CVS directories.
#####################################################################################

sub copy_complete_directory_without_cvs
{
	my ($sourcedir, $destdir) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( ! -d $destdir ) { create_directory($destdir); }

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Copying files from directory $sourcedir to directory $destdir (without CVS)\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")) && (!($onefile eq "CVS")))
		{
			my $source = $sourcedir . $installer::globals::separator . $onefile;
			my $dest = $destdir . $installer::globals::separator . $onefile;
			if ( -f $source ) 	# only files, no directories
			{
				copy_one_file($source, $dest);
			}
			if ( -d $source ) 	# recursive
			{
				copy_complete_directory_without_cvs($source, $dest);
			}
		}
	}	
}

#####################################################
# Copying all files with a specified file extension
# from one directory to another directory.
#####################################################

sub copy_directory_with_fileextension
{
	my ($sourcedir, $destdir, $extension) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	$infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Copying files with extension $extension from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			if ( $onefile =~ /\.$extension\s*$/ )	# only copying specified files
			{
				my $sourcefile = $sourcedir . $installer::globals::separator . $onefile;
				my $destfile = $destdir . $installer::globals::separator . $onefile;
				if ( -f $sourcefile ) 	# only files, no directories
				{
					copy_one_file($sourcefile, $destfile);
				}
			}
		}
	}	
}

#########################################################
# Copying all files without a specified file extension
# from one directory to another directory.
#########################################################

sub copy_directory_except_fileextension
{
	my ($sourcedir, $destdir, $extension) = @_;
	
	my @sourcefiles = ();
	
	$sourcedir =~ s/\Q$installer::globals::separator\E\s*$//;
	$destdir =~ s/\Q$installer::globals::separator\E\s*$//;

	$infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Copying files without extension $extension from directory $sourcedir to directory $destdir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $sourcedir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			if ( ! ( $onefile =~ /\.$extension\s*$/ ))	# only copying not having the specified extension
			{
				my $sourcefile = $sourcedir . $installer::globals::separator . $onefile;
				my $destfile = $destdir . $installer::globals::separator . $onefile;
				if ( -f $sourcefile ) 	# only files, no directories
				{
					copy_one_file($sourcefile, $destfile);
				}
			}
		}
	}	
}

########################################################
# Renaming all files with a specified file extension
# in a specified directory.
# Example: "Feature.idt.01" -> "Feature.idt"
########################################################

sub rename_files_with_fileextension
{
	my ($dir, $extension) = @_;
	
	my @sourcefiles = ();
	
	$dir =~ s/\Q$installer::globals::separator\E\s*$//;

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Renaming files with extension \"$extension\" in the directory $dir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $dir);
	@sourcefiles = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			if ( $onefile =~ /^\s*(\S.*?)\.$extension\s*$/ )	# only renaming specified files
			{
				my $destfile = $1;
				my $sourcefile = $dir . $installer::globals::separator . $onefile;
				$destfile = $dir . $installer::globals::separator . $destfile;
				if ( -f $sourcefile ) 	# only files, no directories
				{
					rename_one_file($sourcefile, $destfile);
				}
			}
		}
	}	
}

########################################################
# Finding all files with a specified file extension
# in a specified directory.
########################################################

sub find_file_with_file_extension
{
	my ($extension, $dir) = @_;
	
	my @allfiles = ();

	$dir =~ s/\Q$installer::globals::separator\E\s*$//;

	my $infoline = "\n";
	push(@installer::globals::logfileinfo, $infoline);
	$infoline = "Searching files with extension \"$extension\" in the directory $dir\n";
	push(@installer::globals::logfileinfo, $infoline);
	
	opendir(DIR, $dir);
	@sourcefiles = sort readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@sourcefiles)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			if ( $onefile =~ /^\s*(\S.*?)\.$extension\s*$/ )
			{
				push(@allfiles, $onefile)
			}
		}
	}
	
	return \@allfiles;
}

##############################################################
# Creating a unique directory, for example "01_inprogress_7"
# in the install directory.
##############################################################

sub make_numbered_dir
{
	my ($newstring, $olddir) = @_;
	
	my $basedir = $olddir;
	installer::pathanalyzer::get_path_from_fullqualifiedname(\$basedir);

	my $alldirs = get_all_directories($basedir);
	
	# searching for the highest number extension

	my $maxnumber = 0;
	
	for ( my $i = 0; $i <= $#{$alldirs}; $i++ )
	{
		if ( ${$alldirs}[$i] =~ /\_(\d+)\s*$/ )
		{
			my $number = $1;
			if ( $number > $maxnumber ) { $maxnumber = $number; }
		}
	}

	my $newnumber = $maxnumber + 1;
		
	my $newdir = $olddir . "_" . $newstring . "_" . $newnumber;
	
	my $returndir = "";

	if ( move($olddir, $newdir) )
	{
		$infoline = "\nMoved directory from $olddir to $newdir\n";
		push(@installer::globals::logfileinfo, $infoline);
		$returndir = $newdir;
	}
	else
	{
		$infoline = "\nATTENTION: Could not move directory from $olddir to $newdir, \"make_numbered_dir\"\n";
		push(@installer::globals::logfileinfo, $infoline);
		$returndir = $olddir;
	}
	
	return $returndir;
}

##############################################################
# Determining the highest number in the install directory.
##############################################################

sub determine_maximum_number
{
	my ($dir, $languagestringref) = @_;
	
	my $basedir = $dir;
	installer::pathanalyzer::get_path_from_fullqualifiedname(\$basedir);

	my $alldirs = get_all_directories($basedir);

	my $maxnumber = 1;

	# In control.pm the installation directory is determined as:
	# $installer::globals::build . "_" . $installer::globals::lastminor . "_" .
	# "native_inprogress-number_" . $$languagesref . "\." . $installer::globals::buildid;
	
	# searching for the highest number extension after the first "-", which belongs to
	# $installer::globals::build, $installer::globals::lastminor and $installer::globals::buildid
	# In this step not looking for the language!

	my @correctbuildiddirs = ();
	
	for ( my $i = 0; $i <= $#{$alldirs}; $i++ )
	{
		my $onedir = ${$alldirs}[$i];
		installer::pathanalyzer::make_absolute_filename_to_relative_filename(\$onedir);
		
		if ( $onedir =~ /^\s*\Q$installer::globals::build\E\_\Q$installer::globals::lastminor\E\_(.*?)\-(\d+)\_(.*?)\.\Q$installer::globals::buildid\E\s*$/ )
		{
			my $number = $2;
			if ( $number > $maxnumber ) { $maxnumber = $number; }
			push(@correctbuildiddirs, $onedir);
		}
	}

	# From all directories with correct $installer::globals::build, $installer::globals::lastminor
	# and $installer::globals::buildid, those directories, which already have the maximum number
	# have to be selected

	my @maximumnumberdirs = ();

	for ( my $i = 0; $i <= $#correctbuildiddirs; $i++ )
	{
		my $onedir = $correctbuildiddirs[$i];

		if ( $onedir =~ /^\s*(.*?)\-(\d+)\_(.*?)\.(.*?)\s*$/ )
		{
			my $number = $2;
			
			if ( $number == $maxnumber )
			{
				push(@maximumnumberdirs, $onedir);
			}
		}
	}

	# @maximumnumberdirs contains only those directories with correct $installer::globals::build,
	# $installer::globals::lastminor and $installer::globals::buildid, which already have the maximum number.
	# If the current language is part of this directory, the number has to be increased.

	my $increase_counter = 0;

	for ( my $i = 0; $i <= $#maximumnumberdirs; $i++ )
	{
		my $onedir = $maximumnumberdirs[$i];

		if ( $onedir =~ /^\s*(.*?)\-(\d+)\_(.*?)\.(.*?)\s*$/ )
		{
			my $number = $2;
			my $languagestring = $3;
			
			if ( $languagestring eq $$languagestringref )
			{
				$increase_counter = 1;
			}
		}
	}

	if ( $increase_counter )
	{
		$maxnumber = $maxnumber + 1;
	}
		
	return $maxnumber;
}

#####################################################################################
# Renaming a directory by exchanging a string, for example from "01_inprogress_7"
# to "01_witherror_7".
#####################################################################################

sub rename_string_in_directory
{
	my ($olddir, $oldstring, $newstring) = @_;
	
	my $newdir = $olddir;
	my $infoline = "";
		
	$newdir =~ s/$oldstring/$newstring/g;
	
	if (( -d $newdir ) && ( $olddir ne $newdir )) { remove_complete_directory($newdir, 1); }
	
	if ( move($olddir, $newdir) )
	{
		$infoline = "\nMoved directory from $olddir to $newdir\n";
		push(@installer::globals::logfileinfo, $infoline);
	}
	else
	{
		$infoline = "\nATTENTION: Could not move directory from $olddir to $newdir, \"rename_string_in_directory\"\n";
		push(@installer::globals::logfileinfo, $infoline);
	}
	
	return $newdir;
}

######################################################
# Returning the complete directory name,
# input is the first part of the directory name.
######################################################

sub get_directoryname
{
	my ($searchdir, $startstring) = @_;
	
	my $dirname = "";
	my $founddir = 0;
	my $direntry;
	
	opendir(DIR, $searchdir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		if (( -d $direntry ) && ( $direntry =~ /^\s*\Q$startstring\E/ ))
		{
			$dirname = $direntry;
			$founddir = 1;
			last;
		}
	}

	closedir(DIR);

	if ( ! $founddir ) { installer::exiter::exit_program("ERROR: Did not find directory beginning with $startstring in directory $searchdir", "get_directoryname"); }
	
	return $dirname;
}


###################################
# Renaming a directory
###################################

sub rename_directory
{
	my ($olddir, $newdir) = @_;
	
	my $infoline = "";

	# noticed problems under Windows from time to time that directories can't be moved, seems a timing issue
    # workaround with sleep, should be investigated with a new packaging mechanism
    sleep(2); 
	if ( move($olddir, $newdir) )
	{
		$infoline = "\nMoved directory from $olddir to $newdir\n";
		push(@installer::globals::logfileinfo, $infoline);
	}
	else
	{
		installer::exiter::exit_program("ERROR: Could not move directory from $olddir to $newdir", "rename_directory");
		# $infoline = "\nATTENTION: Could not move directory from $olddir to $newdir, \"rename_directory\"\n";
		# push(@installer::globals::logfileinfo, $infoline);
	}
	
	return $newdir;
}

##############################################################
# Creating a directory next to an existing directory
##############################################################

sub create_directory_next_to_directory
{
	my ($topdir, $dirname) = @_;

	my $basedir = $topdir;
	installer::pathanalyzer::get_path_from_fullqualifiedname(\$basedir);

	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;
	
	my $newdir = $basedir . $installer::globals::separator . $dirname;
	
	create_directory($newdir);
	
	return $newdir;
}

##############################################################
# Collecting all directories inside a directory
##############################################################

sub get_all_directories
{
	my ($basedir) = @_;
	
	my @alldirs = ();
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if ( -d $completeentry ) { push(@alldirs, $completeentry); }
	}

	closedir(DIR);
	
	return \@alldirs;
}

##############################################################
# Collecting all directories inside a directory
# Returning without path
##############################################################

sub get_all_directories_without_path
{
	my ($basedir) = @_;
	
	my @alldirs = ();
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if ( -d $completeentry ) { push(@alldirs, $direntry); }
	}

	closedir(DIR);
	
	return \@alldirs;
}

##############################################################
# Collecting all files inside one directory
##############################################################

sub get_all_files_from_one_directory
{
	my ($basedir) = @_;
	
	my @allfiles = ();
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if ( -f $completeentry ) { push(@allfiles, $completeentry); }
	}

	closedir(DIR);
	
	return \@allfiles;
}

##############################################################
# Collecting all files inside one directory
##############################################################

sub get_all_files_from_one_directory_without_path
{
	my ($basedir) = @_;
	
	my @allfiles = ();
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";

		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if ( -f $completeentry ) { push(@allfiles, $direntry); }
	}

	closedir(DIR);
	
	return \@allfiles;
}

##############################################################
# Collecting all files and directories inside one directory
##############################################################

sub read_directory
{
	my ($basedir) = @_;
	
	my @allcontent = ();
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if (( -f $completeentry ) || ( -d $completeentry )) { push(@allcontent, $completeentry); }
	}

	closedir(DIR);
	
	return \@allcontent;
}

##############################################################
# Finding the new content in a directory
##############################################################

sub find_new_content_in_directory
{
	my ( $basedir, $oldcontent ) = @_;
	
	my @newcontent = ();
	my @allcontent = ();
	
	my $direntry;
	
	$basedir =~ s/\Q$installer::globals::separator\E\s*$//;

	opendir(DIR, $basedir);
	
	foreach $direntry (readdir (DIR))
	{
		next if $direntry eq ".";
		next if $direntry eq "..";
		
		my $completeentry = $basedir . $installer::globals::separator . $direntry;

		if (( -f $completeentry ) || ( -d $completeentry ))
		{
			push(@allcontent, $completeentry);
			if (! installer::existence::exists_in_array($completeentry, $oldcontent))
			{
				push(@newcontent, $completeentry);
			} 
		}
	}

	closedir(DIR);
	
	return (\@newcontent, \@allcontent);
}

##############################################################
# Trying to create a directory, no error if this fails
##############################################################

sub try_to_create_directory
{
	my ($directory) = @_;
	
	my $returnvalue = 1;
	my $created_directory = 0;

	if (!(-d $directory))
	{
		$returnvalue = mkdir($directory, 0775);

		if ($returnvalue)
		{
			$created_directory = 1;
			$infoline = "\nCreated directory: $directory\n";
			push(@installer::globals::logfileinfo, $infoline);
	
			my $localcall = "chmod 0775 $directory \>\/dev\/null 2\>\&1";
			system($localcall);

			# chmod 0775 is not sufficient on mac to remove sticky tag
			$localcall = "chmod a-s $directory \>\/dev\/null 2\>\&1";
			system($localcall);
		}
		else
		{
			$created_directory = 0;
		}
	}
	else
	{
		$created_directory = 1;
	}

	return $created_directory;
}

##############################################################
# Creating a complete directory structure
##############################################################

sub create_directory_structure
{
	my ($directory) = @_;

	if ( ! try_to_create_directory($directory) )
	{
		my $parentdir = $directory;
		installer::pathanalyzer::get_path_from_fullqualifiedname(\$parentdir);

		my $infoline = "INFO: Did not create directory $directory\n";
		push(@installer::globals::logfileinfo, $infoline);
		$infoline = "Now trying to create parent directory $parentdir\n";
		push(@installer::globals::logfileinfo, $infoline);

		create_directory_structure($parentdir);									# recursive
	}
	
	create_directory($directory);	# now it has to succeed
}

######################################################
# Removing a complete directory with subdirectories
######################################################

sub remove_complete_directory
{
	my ($directory, $start) = @_;

	my @content = ();
	my $infoline = "";
	
	$directory =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( -d $directory )
	{
		if ( $start )
		{
			$infoline = "\n";
			push(@installer::globals::logfileinfo, $infoline);
			$infoline = "Removing directory $directory\n";
			push(@installer::globals::logfileinfo, $infoline);
		}
	
		opendir(DIR, $directory);
		@content = readdir(DIR);
		closedir(DIR);

		my $oneitem;
	
		foreach $oneitem (@content)
		{
			if ((!($oneitem eq ".")) && (!($oneitem eq "..")))
			{
				my $item = $directory . $installer::globals::separator . $oneitem;

				if ( -f $item || -l $item ) 	# deleting files or links
				{
					unlink($item);
				}

				if ( -d $item ) 	# recursive
				{
					remove_complete_directory($item, 0);
				}
			}
		}
		
		# try to remove empty directory
				
		my $returnvalue = rmdir $directory;

		if ( ! $returnvalue )
		{
			$infoline = "Warning: Problem with removing empty dir $directory\n";
			push(@installer::globals::logfileinfo, $infoline);
		}
		
		# try a little bit harder (sometimes there is a performance problem)
		if ( -d $directory )
		{
			for ( my $j = 1; $j <= 3; $j++ )
			{
				if ( -d $directory )
				{
					$infoline = "\n";
					push(@installer::globals::logfileinfo, $infoline);
					$infoline = "Warning (Try $j): Problems with removing directory $directory\n";
					push(@installer::globals::logfileinfo, $infoline);

					$returnvalue = rmdir $directory;

					if ( $returnvalue )
					{
						$infoline = "Successfully removed empty dir $directory\n";
						push(@installer::globals::logfileinfo, $infoline);
					} else {
						$infoline = "Warning: rmdir $directory failed.\n";
						push(@installer::globals::logfileinfo, $infoline);
					}
				}
			}
		}
	}	
}

######################################################
# Creating a unique directory with number extension	
######################################################

sub create_unique_directory
{
	my ($directory) = @_;
	
	$directory =~ s/\Q$installer::globals::separator\E\s*$//;
	$directory = $directory . "_INCREASINGNUMBER";
	
	my $counter = 1;
	my $created = 0;
	my $localdirectory = "";

	do
	{
		$localdirectory = $directory;
		$localdirectory =~ s/INCREASINGNUMBER/$counter/;
		$counter++;
		
		if ( ! -d $localdirectory )
		{
			create_directory($localdirectory);
			$created = 1;
		}		
	}
	while ( ! $created );
	
	return $localdirectory;
}

######################################################
# Creating a unique directory with pid extension	
######################################################

sub create_pid_directory
{
	my ($directory) = @_;
	
	$directory =~ s/\Q$installer::globals::separator\E\s*$//;
	my $pid = $$;			# process id
	my $time = time();		# time
	
	$directory = $directory . "_" . $pid . $time;

	if ( ! -d $directory ) { create_directory($directory); }		
	else { installer::exiter::exit_program("ERROR: Directory $directory already exists!", "create_pid_directory"); }
	
	return $directory;
}

##############################################################
# Reading all files from a directory and its subdirectories	
##############################################################

sub read_complete_directory
{
	my ($directory, $pathstring, $filecollector) = @_;
	
	my @content = ();
	opendir(DIR, $directory);
	@content = readdir(DIR);
	closedir(DIR);

	my $onefile;
	
	foreach $onefile (@content)
	{
		if ((!($onefile eq ".")) && (!($onefile eq "..")))
		{
			my $completefilename = $directory . $installer::globals::separator . $onefile;
			my $sep = "";
			if ( $pathstring ne "" ) { $sep = $installer::globals::separator; }

			if ( ! -d $completefilename ) 	# only files, no directories
			{
				my $content = $pathstring . $sep . $onefile;
				push(@{$filecollector}, $content);
			}
			else  # recursive for directories
			{
				my $newpathstring = $pathstring . $sep . $onefile;
				read_complete_directory($completefilename, $newpathstring, $filecollector);
			}
		}
	}
}

##############################################################
# Reading all files from a directory and its subdirectories
# Version 2	
##############################################################

sub read_full_directory {
	my ( $currentdir, $pathstring, $collector ) = @_;
	my $item;
	my $fullname;
	local *DH;

	unless (opendir(DH, $currentdir))
	{
		return;
	}
	while (defined ($item = readdir(DH)))
	{
		next if($item eq "." or $item eq "..");
		$fullname = $currentdir . $installer::globals::separator . $item;
		my $sep = "";
		if ( $pathstring ne "" ) { $sep = $installer::globals::separator; }

		if( -d $fullname)
		{
			my $newpathstring = $pathstring . $sep . $item;
			read_full_directory($fullname, $newpathstring, $collector) if(-d $fullname);
		}
		else
		{
			my $content = $pathstring . $sep . $item;
			push(@{$collector}, $content);
		}
	}
	closedir(DH);
	return 
}

##############################################################
# Removing all empty directories below a specified directory
##############################################################

sub remove_empty_dirs_in_folder
{
	my ( $dir ) = @_;

	my @content = ();
	my $infoline = "";
	
	$dir =~ s/\Q$installer::globals::separator\E\s*$//;

	if ( -d $dir )
	{
		opendir(DIR, $dir);
		@content = readdir(DIR);
		closedir(DIR);

		my $oneitem;
	
		foreach $oneitem (@content)
		{
			if ((!($oneitem eq ".")) && (!($oneitem eq "..")))
			{
				my $item = $dir . $installer::globals::separator . $oneitem;

				if ( -d $item ) # recursive
				{
					remove_empty_dirs_in_folder($item);
				}
			}
		}
		
		# try to remove empty directory		
		my $returnvalue = rmdir $dir;

		if ( $returnvalue )
		{
			$infoline = "Successfully removed empty dir $dir\n";
			push(@installer::globals::logfileinfo, $infoline);
		}
		
	}
	
}

1;