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lsb_release.py	12.893 KB	-rw-r--r--	2019-03-09 18:30	R E G D
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#!/usr/bin/python # LSB release detection module for Debian # (C) 2005-10 Chris Lawrence # (C) 2018 Didier Raboud # This package 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; version 2 dated June, 1991. # This package 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 package; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA # 02110-1301 USA # Python3-compatible print() function from __future__ import print_function import sys import subprocess import os import re import warnings import csv def get_distro_info(origin='Debian'): try: FileNotFoundException = FileNotFoundError except NameError: # There is no FileNotFoundError in python2 FileNotFoundException = IOError try: csvfile = open('/usr/share/distro-info/%s.csv' % origin.lower()) except FileNotFoundException: # Unknown distro, fallback to Debian csvfile = open('/usr/share/distro-info/debian.csv') reader = csv.DictReader(csvfile) global RELEASE_CODENAME_LOOKUP, RELEASES_ORDER, TESTING_CODENAME RELEASE_CODENAME_LOOKUP = { r['version']: r['series'] for r in reader if r['version']} RELEASES_ORDER = list(RELEASE_CODENAME_LOOKUP.items()) RELEASES_ORDER.sort(key=lambda n: float(n[0])) RELEASES_ORDER = list(list(zip(*RELEASES_ORDER))[1]) if origin.lower() == 'debian': TESTING_CODENAME = 'unknown.new.testing' RELEASES_ORDER.extend(['stable', 'proposed-updates', 'testing', 'testing-proposed-updates', 'unstable', 'sid']) csvfile.close() # Populate default distro info get_distro_info() def lookup_codename(release, unknown=None): m = re.match(r'(\d+)\.(\d+)(r(\d+))?', release) if not m: return unknown if int(m.group(1)) < 7: shortrelease = '%s.%s' % m.group(1,2) else: shortrelease = '%s' % m.group(1) return RELEASE_CODENAME_LOOKUP.get(shortrelease, unknown) def valid_lsb_versions(version, module): # If a module is ever released that only appears in >= version, deal # with that here if version == '3.0': return ['2.0', '3.0'] elif version == '3.1': if module in ('desktop', 'qt4'): return ['3.1'] elif module == 'cxx': return ['3.0', '3.1'] else: return ['2.0', '3.0', '3.1'] elif version == '3.2': if module == 'desktop': return ['3.1', '3.2'] elif module == 'qt4': return ['3.1'] elif module in ('printing', 'languages', 'multimedia'): return ['3.2'] elif module == 'cxx': return ['3.0', '3.1', '3.2'] else: return ['2.0', '3.0', '3.1', '3.2'] elif version == '4.0': if module == 'desktop': return ['3.1', '3.2', '4.0'] elif module == 'qt4': return ['3.1'] elif module in ('printing', 'languages', 'multimedia'): return ['3.2', '4.0'] elif module == 'security': return ['4.0'] elif module == 'cxx': return ['3.0', '3.1', '3.2', '4.0'] else: return ['2.0', '3.0', '3.1', '3.2', '4.0'] elif version == '4.1': if module == 'desktop': return ['3.1', '3.2', '4.0', '4.1'] elif module == 'qt4': return ['3.1'] elif module in ('printing', 'languages', 'multimedia'): return ['3.2', '4.0', '4.1'] elif module == 'security': return ['4.0', '4.1'] elif module == 'cxx': return ['3.0', '3.1', '3.2', '4.0', '4.1'] else: return ['2.0', '3.0', '3.1', '3.2', '4.0', '4.1'] return [version] try: set # introduced in 2.4 except NameError: import sets set = sets.Set # This is Debian-specific at present def check_modules_installed(): return [] longnames = {'v' : 'version', 'o': 'origin', 'a': 'suite', 'c' : 'component', 'l': 'label'} def parse_policy_line(data): retval = {} bits = data.split(',') for bit in bits: kv = bit.split('=', 1) if len(kv) > 1: k, v = kv[:2] if k in longnames: retval[longnames[k]] = v return retval def release_index(x): suite = x[1].get('suite') if suite: if suite in RELEASES_ORDER: return int(len(RELEASES_ORDER) - RELEASES_ORDER.index(suite)) else: try: return float(suite) except ValueError: return 0 return 0 def compare_release(x, y): warnings.warn('compare_release(x,y) is deprecated; please use the release_index(x) as key for sort() instead.', DeprecationWarning, stacklevel=2) suite_x_i = release_index(x) suite_y_i = release_index(y) try: return suite_x_i - suite_y_i except TypeError: return (suite_x_i > suite_y_i) - (suite_x_i < suite_y_i) def parse_apt_policy(): data = [] C_env = os.environ.copy(); C_env['LC_ALL'] = 'C.UTF-8' policy = subprocess.Popen(['apt-cache','policy'], env=C_env, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True).communicate()[0].decode('utf-8') for line in policy.split('\n'): line = line.strip() m = re.match(r'(-?\d+)', line) if m: priority = int(m.group(1)) if line.startswith('release'): bits = line.split(' ', 1) if len(bits) > 1: data.append( (priority, parse_policy_line(bits[1])) ) return data def guess_release_from_apt(origin='Debian', component='main', ignoresuites=('experimental'), label='Debian', alternate_olabels={'Debian Ports': ('ftp.ports.debian.org', 'ftp.debian-ports.org')}): releases = parse_apt_policy() if not releases: return None # We only care about the specified origin, component, and label releases = [x for x in releases if ( x[1].get('origin', '') == origin and x[1].get('suite', '') not in ignoresuites and x[1].get('component', '') == component and x[1].get('label', '') == label) or ( x[1].get('origin', '') in alternate_olabels and x[1].get('label', '') in alternate_olabels.get(x[1].get('origin', '')))] # Check again to make sure we didn't wipe out all of the releases if not releases: return None releases.sort(key=lambda tuple: tuple[0],reverse=True) # We've sorted the list by descending priority, so the first entry should # be the "main" release in use on the system max_priority = releases[0][0] releases = [x for x in releases if x[0] == max_priority] releases.sort(key=release_index) return releases[0][1] def guess_debian_release(): distinfo = {} distinfo['ID'] = 'Debian' # Use /etc/dpkg/origins/default to fetch the distribution name etc_dpkg_origins_default = os.environ.get('LSB_ETC_DPKG_ORIGINS_DEFAULT','/etc/dpkg/origins/default') if os.path.exists(etc_dpkg_origins_default): try: with open(etc_dpkg_origins_default) as dpkg_origins_file: for line in dpkg_origins_file: try: (header, content) = line.split(': ', 1) header = header.lower() content = content.strip() if header == 'vendor': distinfo['ID'] = content except ValueError: pass except IOError as msg: print('Unable to open ' + etc_dpkg_origins_default + ':', str(msg), file=sys.stderr) # Populate RELEASES_ORDER for the correct distro get_distro_info(distinfo['ID']) kern = os.uname()[0] if kern in ('Linux', 'Hurd', 'NetBSD'): distinfo['OS'] = 'GNU/'+kern elif kern == 'FreeBSD': distinfo['OS'] = 'GNU/k'+kern elif kern in ('GNU/Linux', 'GNU/kFreeBSD'): distinfo['OS'] = kern else: distinfo['OS'] = 'GNU' distinfo['DESCRIPTION'] = '%(ID)s %(OS)s' % distinfo etc_debian_version = os.environ.get('LSB_ETC_DEBIAN_VERSION','/etc/debian_version') if os.path.exists(etc_debian_version): try: with open(etc_debian_version) as debian_version: release = debian_version.read().strip() except IOError as msg: print('Unable to open ' + etc_debian_version + ':', str(msg), file=sys.stderr) release = 'unknown' if not release[0:1].isalpha(): # /etc/debian_version should be numeric codename = lookup_codename(release, 'n/a') distinfo.update({ 'RELEASE' : release, 'CODENAME' : codename }) elif release.endswith('/sid'): if release.rstrip('/sid').lower() != 'testing': global TESTING_CODENAME TESTING_CODENAME = release.rstrip('/sid') distinfo['RELEASE'] = 'testing/unstable' else: distinfo['RELEASE'] = release # Only use apt information if we did not get the proper information # from /etc/debian_version or if we don't have a codename # (which will happen if /etc/debian_version does not contain a # number but some text like 'testing/unstable' or 'lenny/sid') # # This is slightly faster and less error prone in case the user # has an entry in his /etc/apt/sources.list but has not actually # upgraded the system. if not distinfo.get('CODENAME'): rinfo = guess_release_from_apt() if rinfo: release = rinfo.get('version') # Special case Debian-Ports as their Release file has 'version': '1.0' if release == '1.0' and rinfo.get('origin') == 'Debian Ports' and rinfo.get('label') in ('ftp.ports.debian.org', 'ftp.debian-ports.org'): release = None rinfo.update({'suite': 'unstable'}) if release: codename = lookup_codename(release, 'n/a') else: release = rinfo.get('suite', 'unstable') if release == 'testing': # Would be nice if I didn't have to hardcode this. codename = TESTING_CODENAME else: codename = 'sid' distinfo.update({ 'RELEASE' : release, 'CODENAME' : codename }) if distinfo.get('RELEASE'): distinfo['DESCRIPTION'] += ' %(RELEASE)s' % distinfo if distinfo.get('CODENAME'): distinfo['DESCRIPTION'] += ' (%(CODENAME)s)' % distinfo return distinfo # Whatever is guessed above can be overridden in /usr/lib/os-release by derivatives def get_os_release(): distinfo = {} os_release = os.environ.get('LSB_OS_RELEASE', '/usr/lib/os-release') if os.path.exists(os_release): try: with open(os_release) as os_release_file: for line in os_release_file: line = line.strip() if not line: continue # Skip invalid lines if not '=' in line: continue var, arg = line.split('=', 1) if arg.startswith('"') and arg.endswith('"'): arg = arg[1:-1] if arg: # Ignore empty arguments # Concert os-release to lsb-release-style if var == 'VERSION_ID': # It'll ignore point-releases distinfo['RELEASE'] = arg.strip() elif var == 'VERSION_CODENAME': distinfo['CODENAME'] = arg.strip() elif var == 'ID': # ID=debian distinfo['ID'] = arg.strip().title() elif var == 'PRETTY_NAME': distinfo['DESCRIPTION'] = arg.strip() except IOError as msg: print('Unable to open ' + os_release + ':', str(msg), file=sys.stderr) return distinfo def get_distro_information(): lsbinfo = get_os_release() # OS is only used inside guess_debian_release anyway for key in ('ID', 'RELEASE', 'CODENAME', 'DESCRIPTION',): if key not in lsbinfo: distinfo = guess_debian_release() distinfo.update(lsbinfo) return distinfo else: return lsbinfo def test(): print(get_distro_information()) print(check_modules_installed()) if __name__ == '__main__': test()