#!/usr/bin/python # # The Qubes OS Project, http://www.qubes-os.org # # Copyright (C) 2011 Marek Marczykowski # # 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. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # # import subprocess import re import os import sys import fnmatch import shutil from optparse import OptionParser from qubes.qubes import QubesVmCollection,QubesException # fields required to be present (and verified) in retrieved desktop file required_fields = [ "Name", "Exec" ] #limits appmenus_line_size = 1024 appmenus_line_count = 100000 # regexps for sanitization of retrieved values std_re = re.compile(r"^[/a-zA-Z0-9.,&() -]*$") fields_regexp = { "Name": std_re, "GenericName": std_re, "Comment": std_re, "Categories": re.compile(r"^[a-zA-Z0-9/.; -]*$"), "Exec": re.compile(r"^[a-zA-Z0-9%>/:.= -]*$"), } def get_appmenus(vm): global appmenus_line_count global appmenus_line_size untrusted_appmenulist = [] if vm is None: while appmenus_line_count > 0: untrusted_line = sys.stdin.readline(appmenus_line_size) if untrusted_line == "": break; untrusted_appmenulist.append(untrusted_line.strip()) appmenus_line_count -= 1 if appmenus_line_count == 0: raise QubesException("Line count limit exceeded") else: p = vm.run('QUBESRPC qubes.GetAppmenus dom0', passio_popen=True) while appmenus_line_count > 0: untrusted_line = p.stdout.readline(appmenus_line_size) if untrusted_line == "": break; untrusted_appmenulist.append(untrusted_line.strip()) appmenus_line_count -= 1 p.wait() if p.returncode != 0: raise QubesException("Error getting application list") if appmenus_line_count == 0: raise QubesException("Line count limit exceeded") row_no = 0 appmenus = {} line_rx = re.compile(r"([a-zA-Z0-9-.]+.desktop):([a-zA-Z0-9-]+(?:\[[a-zA-Z@_]+\])?)=(.*)") ignore_rx = re.compile(r".*([a-zA-Z0-9-.]+.desktop):(#.*|\s+)$") for untrusted_line in untrusted_appmenulist: # Ignore blank lines and comments if len(untrusted_line) == 0 or ignore_rx.match(untrusted_line): continue # use search instead of match to skip file path untrusted_m = line_rx.search(untrusted_line) if untrusted_m: untrusted_key = untrusted_m.group(2) untrusted_value = untrusted_m.group(3) # Look only at predefined keys if fields_regexp.has_key(untrusted_key): if fields_regexp[untrusted_key].match(untrusted_value): # now values are sanitized key = untrusted_key value = untrusted_value filename = untrusted_m.group(1) if not appmenus.has_key(filename): appmenus[filename] = {} appmenus[filename][key]=value else: print >>sys.stderr, "Warning: ignoring key %s: %s" % (untrusted_key, untrusted_value) # else: ignore this key else: print >>sys.stderr, "Warning: ignoring line: %s" % (untrusted_line); return appmenus def create_template(path, values): # check if all required fields are present for key in required_fields: if not values.has_key(key): print >>sys.stderr, "Warning: not creating/updating '%s' because of missing '%s' key" % (path, key) return desktop_file = open(path, "w") desktop_file.write("[Desktop Entry]\n") desktop_file.write("Version=1.0\n") desktop_file.write("Type=Application\n") desktop_file.write("Terminal=false\n") desktop_file.write("X-Qubes-VmName=%VMNAME%\n") desktop_file.write("Icon=%VMDIR%/icon.png\n") for key in ["Name", "GenericName" ]: if values.has_key(key): desktop_file.write("{0}=%VMNAME%: {1}\n".format(key, values[key])) for key in [ "Comment", "Categories" ]: if values.has_key(key): desktop_file.write("{0}={1}\n".format(key, values[key])) desktop_file.write("Exec=qvm-run -q --tray -a %VMNAME% '{0}'\n".format(values['Exec'])) desktop_file.close() def main(): env_vmname = os.environ.get("QREXEC_REMOTE_DOMAIN") usage = "usage: %prog [options] \n"\ "Updates desktop file templates for given StandaloneVM or TemplateVM" parser = OptionParser (usage) parser.add_option ("-v", "--verbose", action="store_true", dest="verbose", default=False) parser.add_option ("--force-root", action="store_true", dest="force_root", default=False, help="Force to run, even with root privileges") (options, args) = parser.parse_args () if (len (args) != 1) and env_vmname is None: parser.error ("You must specify at least the VM name!") if env_vmname: vmname=env_vmname else: vmname=args[0] if os.geteuid() == 0: if not options.force_root: print >> sys.stderr, "*** Running this tool as root is strongly discouraged, this will lead you in permissions problems." print >> sys.stderr, "Retry as unprivileged user." print >> sys.stderr, "... or use --force-root to continue anyway." exit(1) qvm_collection = QubesVmCollection() qvm_collection.lock_db_for_reading() qvm_collection.load() qvm_collection.unlock_db() vm = qvm_collection.get_vm_by_name(vmname) if vm is None: print >>sys.stderr, "ERROR: A VM with the name '{0}' does not exist in the system.".format(vmname) exit(1) if vm.template is not None: print >>sys.stderr, "ERROR: To sync appmenus for template based VM, do it on template instead" exit(1) if not vm.is_running(): print >>sys.stderr, "ERROR: Appmenus can be retrieved only from running VM - start it first" exit(1) new_appmenus = {} if env_vmname is None: new_appmenus = get_appmenus(vm) else: options.verbose = False new_appmenus = get_appmenus(None) if len(new_appmenus) == 0: print >>sys.stderr, "ERROR: No appmenus received, terminating" exit(1) if not os.path.exists(vm.appmenus_templates_dir): os.mkdir(vm.appmenus_templates_dir) # Create new/update existing templates if options.verbose: print >> sys.stderr, "--> Got {0} appmenus, storing to disk".format(str(len(new_appmenus))) for appmenu_file in new_appmenus.keys(): if options.verbose: if os.path.exists(vm.appmenus_templates_dir + '/' + appmenu_file): print >> sys.stderr, "---> Updating {0}".format(appmenu_file) else: print >> sys.stderr, "---> Creating {0}".format(appmenu_file) create_template(vm.appmenus_templates_dir + '/' + appmenu_file, new_appmenus[appmenu_file]) # Delete appmenus of remove applications if options.verbose: print >> sys.stderr, "--> Cleaning old files" for appmenu_file in os.listdir(vm.appmenus_templates_dir): if not fnmatch.fnmatch(appmenu_file, '*.desktop'): continue if not new_appmenus.has_key(appmenu_file): if options.verbose: print >> sys.stderr, "---> Removing {0}".format(appmenu_file) os.unlink(vm.appmenus_templates_dir + '/' + appmenu_file) main()