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require 'zlib'
require 'archive/tar/minitar'
module PuppetForge
class Tar
class Mini
SYMLINK_FLAGS = [2]
VALID_TAR_FLAGS = (0..7)
# @return [Hash{:symbol => Array<String>}] a hash with file-category keys pointing to lists of filenames.
def unpack(sourcefile, destdir)
# directories need to be changed outside of the Minitar::unpack because directories don't have a :file_done action
dirlist = []
file_lists = {}
Zlib::GzipReader.open(sourcefile) do |reader|
file_lists = validate_files(reader)
Archive::Tar::Minitar.unpack(reader, destdir, file_lists[:valid]) do |action, name, stats|
case action
when :file_done
FileUtils.chmod('u+rw,g+r,a-st', "#{destdir}/#{name}")
when :file_start
validate_entry(destdir, name)
when :dir
validate_entry(destdir, name)
dirlist << "#{destdir}/#{name}"
end
end
end
dirlist.each {|d| File.chmod(0755, d)}
file_lists
end
def pack(sourcedir, destfile)
Zlib::GzipWriter.open(destfile) do |writer|
Archive::Tar::Minitar.pack(sourcedir, writer)
end
end
private
# Categorize all the files in tarfile as :valid, :invalid, or :symlink.
#
# :invalid files include 'x' and 'g' flags from the PAX standard but and any other non-standard tar flags.
# tar format info: http://pic.dhe.ibm.com/infocenter/zos/v1r13/index.jsp?topic=%2Fcom.ibm.zos.r13.bpxa500%2Ftaf.htm
# pax format info: http://pic.dhe.ibm.com/infocenter/zos/v1r13/index.jsp?topic=%2Fcom.ibm.zos.r13.bpxa500%2Fpxarchfm.htm
# :symlinks are not supported in Puppet modules
# :valid files are any of those that can be used in modules
# @param tarfile name of the tarfile
# @return [Hash{:symbol => Array<String>}] a hash with file-category keys pointing to lists of filenames.
def validate_files(tarfile)
file_lists = {:valid => [], :invalid => [], :symlinks => []}
Archive::Tar::Minitar.open(tarfile).each do |entry|
flag = entry.typeflag
if flag.nil? || flag =~ /[[:digit:]]/ && SYMLINK_FLAGS.include?(flag.to_i)
file_lists[:symlinks] << entry.full_name
elsif flag.nil? || flag =~ /[[:digit:]]/ && VALID_TAR_FLAGS.include?(flag.to_i)
file_lists[:valid] << entry.full_name
else
file_lists[:invalid] << entry.full_name
end
end
file_lists
end
def validate_entry(destdir, path)
if Pathname.new(path).absolute?
raise PuppetForge::InvalidPathInPackageError, :entry_path => path, :directory => destdir
end
path = File.expand_path File.join(destdir, path)
if path !~ /\A#{Regexp.escape destdir}/
raise PuppetForge::InvalidPathInPackageError, :entry_path => path, :directory => destdir
end
end
end
end
end
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