[ SEA-GHOST MINI SHELL]
#! /usr/bin/python -tt
"""
Assorted utility functions for yum.
"""
import types
import os
import sys
import os.path
from cStringIO import StringIO
import base64
import binascii
import struct
import re
import errno
import Errors
import constants
import pgpmsg
import tempfile
import glob
import pwd
import fnmatch
import bz2
import gzip
import shutil
import urllib
import string
_available_compression = ['gz', 'bz2']
try:
import lzma
_available_compression.append('xz')
except ImportError:
lzma = None
from rpmUtils.miscutils import stringToVersion, flagToString
from stat import *
try:
import gpgme
import gpgme.editutil
except ImportError:
gpgme = None
try:
import hashlib
_available_checksums = set(['md5', 'sha1', 'sha256', 'sha384', 'sha512'])
except ImportError:
# Python-2.4.z ... gah!
import sha
import md5
_available_checksums = set(['md5', 'sha1'])
class hashlib:
@staticmethod
def new(algo):
if algo == 'md5':
return md5.new()
if algo == 'sha1':
return sha.new()
raise ValueError, "Bad checksum type"
# some checksum types might be disabled
_fips_noncompliant = set()
for ctype in list(_available_checksums):
try:
hashlib.new(ctype)
except Exception as e:
# Print an error unless this is due to FIPS mode (in which case it's
# not really an error and we don't want to pollute the output
# needlessly; if someone actually tries to instantiate a Checksum with
# a FIPS non-compliant ctype, we'll raise an explanatory exception
# anyway).
if isinstance(e, ValueError) and str(e).endswith('disabled for fips'):
_fips_noncompliant.add(ctype)
else:
print >> sys.stderr, 'Checksum type %s disabled' % repr(ctype)
_available_checksums.remove(ctype)
for ctype in 'sha256', 'sha1':
if ctype in _available_checksums:
_default_checksums = [ctype]
break
else:
raise ImportError, 'broken hashlib'
from Errors import MiscError, FIPSNonCompliantError
# These are API things, so we can't remove them even if they aren't used here.
# pylint: disable-msg=W0611
from i18n import to_utf8, to_unicode
# pylint: enable-msg=W0611
_share_data_store = {}
_share_data_store_u = {}
def share_data(value):
""" Take a value and use the same value from the store,
if the value isn't in the store this one becomes the shared version. """
# We don't want to change the types of strings, between str <=> unicode
# and hash('a') == hash(u'a') ... so use different stores.
# In theory eventaully we'll have all of one type, but don't hold breath.
store = _share_data_store
if isinstance(value, unicode):
store = _share_data_store_u
# hahahah, of course the above means that:
# hash(('a', 'b')) == hash((u'a', u'b'))
# ...which we have in deptuples, so just screw sharing those atm.
if type(value) == types.TupleType:
return value
return store.setdefault(value, value)
def unshare_data():
global _share_data_store
global _share_data_store_u
_share_data_store = {}
_share_data_store_u = {}
_re_compiled_glob_match = None
def re_glob(s):
""" Tests if a string is a shell wildcard. """
# TODO/FIXME maybe consider checking if it is a stringsType before going on - otherwise
# returning None
global _re_compiled_glob_match
if _re_compiled_glob_match is None:
_re_compiled_glob_match = re.compile('[*?]|\[.+\]').search
return _re_compiled_glob_match(s)
def compile_pattern(pat, ignore_case=False):
""" Compile shell wildcards, return a 'match' function. """
if re_glob(pat):
try:
flags = ignore_case and re.I or 0
return re.compile(fnmatch.translate(pat), flags).match
except re.error:
pass # fall back to exact match
if ignore_case:
pat = pat.lower()
return lambda s: s.lower() == pat
return lambda s: s == pat
_re_compiled_filename_match = None
def re_filename(s):
""" Tests if a string could be a filename. We still get negated character
classes wrong (are they supported), and ranges in character classes. """
global _re_compiled_filename_match
if _re_compiled_filename_match is None:
_re_compiled_filename_match = re.compile('[/*?]|\[[^]]*/[^]]*\]').match
return _re_compiled_filename_match(s)
def re_primary_filename(filename):
""" Tests if a filename string, can be matched against just primary.
Note that this can produce false negatives (Eg. /b?n/zsh) but not false
positives (because the former is a perf hit, and the later is a
failure). Note that this is a superset of re_primary_dirname(). """
if re_primary_dirname(filename):
return True
if filename == '/usr/lib/sendmail':
return True
return False
def re_primary_dirname(dirname):
""" Tests if a dirname string, can be matched against just primary. Note
that this is a subset of re_primary_filename(). """
if 'bin/' in dirname:
return True
if dirname.startswith('/etc/'):
return True
return False
_re_compiled_full_match = None
def re_full_search_needed(s):
""" Tests if a string needs a full nevra match, instead of just name. """
global _re_compiled_full_match
if _re_compiled_full_match is None:
# A glob, or a "." or "-" separator, followed by something (the ".")
one = re.compile('.*([-.*?]|\[.+\]).').match
# Any epoch, for envra
two = re.compile('[0-9]+:').match
_re_compiled_full_match = (one, two)
for rec in _re_compiled_full_match:
if rec(s):
return True
return False
def re_remote_url(s):
""" Tests if a string is a "remote" URL, http, https, ftp. """
s = s.lower()
if s.startswith("http://"):
return True
if s.startswith("https://"):
return True
if s.startswith("ftp://"):
return True
return False
###########
# Title: Remove duplicates from a sequence
# Submitter: Tim Peters
# From: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52560
def unique(s):
"""Return a list of the elements in s, but without duplicates.
For example, unique([1,2,3,1,2,3]) is some permutation of [1,2,3],
unique("abcabc") some permutation of ["a", "b", "c"], and
unique(([1, 2], [2, 3], [1, 2])) some permutation of
[[2, 3], [1, 2]].
For best speed, all sequence elements should be hashable. Then
unique() will usually work in linear time.
If not possible, the sequence elements should enjoy a total
ordering, and if list(s).sort() doesn't raise TypeError it's
assumed that they do enjoy a total ordering. Then unique() will
usually work in O(N*log2(N)) time.
If that's not possible either, the sequence elements must support
equality-testing. Then unique() will usually work in quadratic
time.
"""
n = len(s)
if n == 0:
return []
# Try using a set first, as that's the fastest and will usually
# work. If it doesn't work, it will usually fail quickly, so it
# usually doesn't cost much to *try* it. It requires that all the
# sequence elements be hashable, and support equality comparison.
try:
u = set(s)
except TypeError:
pass
else:
return list(u)
# We can't hash all the elements. Second fastest is to sort,
# which brings the equal elements together; then duplicates are
# easy to weed out in a single pass.
# NOTE: Python's list.sort() was designed to be efficient in the
# presence of many duplicate elements. This isn't true of all
# sort functions in all languages or libraries, so this approach
# is more effective in Python than it may be elsewhere.
try:
t = list(s)
t.sort()
except TypeError:
del t # move on to the next method
else:
assert n > 0
last = t[0]
lasti = i = 1
while i < n:
if t[i] != last:
t[lasti] = last = t[i]
lasti += 1
i += 1
return t[:lasti]
# Brute force is all that's left.
u = []
for x in s:
if x not in u:
u.append(x)
return u
class Checksums:
""" Generate checksum(s), on given pieces of data. Producing the
Length and the result(s) when complete. """
def __init__(self, checksums=None, ignore_missing=False, ignore_none=False):
if checksums is None:
checksums = _default_checksums
self._sumalgos = []
self._sumtypes = []
self._len = 0
done = set()
for sumtype in checksums:
if sumtype == 'sha':
sumtype = 'sha1'
if sumtype in done:
continue
if sumtype in _available_checksums:
sumalgo = hashlib.new(sumtype)
elif ignore_missing:
continue
elif sumtype in _fips_noncompliant:
raise FIPSNonCompliantError(sumtype)
else:
raise MiscError, 'Error Checksumming, bad checksum type %s' % sumtype
done.add(sumtype)
self._sumtypes.append(sumtype)
self._sumalgos.append(sumalgo)
if not done and not ignore_none:
raise MiscError, 'Error Checksumming, no valid checksum type'
def __len__(self):
return self._len
# Note that len(x) is assert limited to INT_MAX, which is 2GB on i686.
length = property(fget=lambda self: self._len)
def update(self, data):
self._len += len(data)
for sumalgo in self._sumalgos:
sumalgo.update(data)
def read(self, fo, size=2**16):
data = fo.read(size)
self.update(data)
return data
def hexdigests(self):
ret = {}
for sumtype, sumdata in zip(self._sumtypes, self._sumalgos):
ret[sumtype] = sumdata.hexdigest()
return ret
def hexdigest(self, checksum=None):
if checksum is None:
if not self._sumtypes:
return None
checksum = self._sumtypes[0]
if checksum == 'sha':
checksum = 'sha1'
return self.hexdigests()[checksum]
def digests(self):
ret = {}
for sumtype, sumdata in zip(self._sumtypes, self._sumalgos):
ret[sumtype] = sumdata.digest()
return ret
def digest(self, checksum=None):
if checksum is None:
if not self._sumtypes:
return None
checksum = self._sumtypes[0]
if checksum == 'sha':
checksum = 'sha1'
return self.digests()[checksum]
class AutoFileChecksums:
""" Generate checksum(s), on given file/fileobject. Pretending to be a file
object (overrrides read). """
def __init__(self, fo, checksums, ignore_missing=False, ignore_none=False):
self._fo = fo
self.checksums = Checksums(checksums, ignore_missing, ignore_none)
def __getattr__(self, attr):
return getattr(self._fo, attr)
def read(self, size=-1):
return self.checksums.read(self._fo, size)
def checksum(sumtype, file, CHUNK=2**16, datasize=None):
"""takes filename, hand back Checksum of it
sumtype = md5 or sha/sha1/sha256/sha512 (note sha == sha1)
filename = /path/to/file
CHUNK=65536 by default"""
# chunking brazenly lifted from Ryan Tomayko
try:
if type(file) not in types.StringTypes:
fo = file # assume it's a file-like-object
else:
fo = open(file, 'r')
data = Checksums([sumtype])
while data.read(fo, CHUNK):
if datasize is not None and data.length > datasize:
break
if type(file) is types.StringType:
fo.close()
# This screws up the length, but that shouldn't matter. We only care
# if this checksum == what we expect.
if datasize is not None and datasize != data.length:
return '!%u!%s' % (datasize, data.hexdigest(sumtype))
return data.hexdigest(sumtype)
except (IOError, OSError), e:
raise MiscError, 'Error opening file for checksum: %s' % file
def getFileList(path, ext, filelist):
"""Return all files in path matching ext, store them in filelist,
recurse dirs return list object"""
extlen = len(ext)
try:
dir_list = os.listdir(path)
except OSError, e:
raise MiscError, ('Error accessing directory %s, %s') % (path, e)
for d in dir_list:
if os.path.isdir(path + '/' + d):
filelist = getFileList(path + '/' + d, ext, filelist)
else:
if not ext or d[-extlen:].lower() == '%s' % (ext):
newpath = os.path.normpath(path + '/' + d)
filelist.append(newpath)
return filelist
class GenericHolder:
"""Generic Holder class used to hold other objects of known types
It exists purely to be able to do object.somestuff, object.someotherstuff
or object[key] and pass object to another function that will
understand it"""
def __init__(self, iter=None):
self.__iter = iter
def __iter__(self):
if self.__iter is not None:
return iter(self[self.__iter])
def __getitem__(self, item):
if hasattr(self, item):
return getattr(self, item)
else:
raise KeyError, item
def procgpgkey(rawkey):
'''Convert ASCII armoured GPG key to binary
'''
# TODO: CRC checking? (will RPM do this anyway?)
# Normalise newlines
rawkey = re.sub('\r\n?', '\n', rawkey)
# Extract block
block = StringIO()
inblock = 0
pastheaders = 0
for line in rawkey.split('\n'):
if line.startswith('-----BEGIN PGP PUBLIC KEY BLOCK-----'):
inblock = 1
elif inblock and line.strip() == '':
pastheaders = 1
elif inblock and line.startswith('-----END PGP PUBLIC KEY BLOCK-----'):
# Hit the end of the block, get out
break
elif pastheaders and line.startswith('='):
# Hit the CRC line, don't include this and stop
break
elif pastheaders:
block.write(line+'\n')
# Decode and return
return base64.decodestring(block.getvalue())
def gpgkey_fingerprint_ascii(info, chop=4):
''' Given a key_info data from getgpgkeyinfo(), return an ascii
fingerprint. Chop every 4 ascii values, as that is what GPG does. '''
# First "duh" ... it's a method...
fp = info['fingerprint']()
fp = binascii.hexlify(fp)
if chop:
fp = [fp[i:i+chop] for i in range(0, len(fp), chop)]
fp = " ".join(fp)
return fp
def getgpgkeyinfo(rawkey, multiple=False):
'''Return a dict of info for the given ASCII armoured key text
Returned dict will have the following keys: 'userid', 'keyid', 'timestamp'
Will raise ValueError if there was a problem decoding the key.
'''
# Catch all exceptions as there can be quite a variety raised by this call
key_info_objs = []
try:
keys = pgpmsg.decode_multiple_keys(rawkey)
except Exception, e:
raise ValueError(str(e))
if len(keys) == 0:
raise ValueError('No key found in given key data')
for key in keys:
keyid_blob = key.public_key.key_id()
info = {
'userid': key.user_id,
'keyid': struct.unpack('>Q', keyid_blob)[0],
'timestamp': key.public_key.timestamp,
'fingerprint' : key.public_key.fingerprint,
'raw_key' : key.raw_key,
'has_sig' : False,
'valid_sig': False,
}
# Retrieve the timestamp from the matching signature packet
# (this is what RPM appears to do)
for userid in key.user_ids[0]:
if not isinstance(userid, pgpmsg.signature):
continue
if userid.key_id() == keyid_blob:
# Get the creation time sub-packet if available
if hasattr(userid, 'hashed_subpaks'):
tspkt = \
userid.get_hashed_subpak(pgpmsg.SIG_SUB_TYPE_CREATE_TIME)
if tspkt != None:
info['timestamp'] = int(tspkt[1])
break
key_info_objs.append(info)
if multiple:
return key_info_objs
else:
return key_info_objs[0]
def keyIdToRPMVer(keyid):
'''Convert an integer representing a GPG key ID to the hex version string
used by RPM
'''
return "%08x" % (keyid & 0xffffffffL)
def keyInstalled(ts, keyid, timestamp):
'''
Return if the GPG key described by the given keyid and timestamp are
installed in the rpmdb.
The keyid and timestamp should both be passed as integers.
The ts is an rpm transaction set object
Return values:
- -1 key is not installed
- 0 key with matching ID and timestamp is installed
- 1 key with matching ID is installed but has a older timestamp
- 2 key with matching ID is installed but has a newer timestamp
No effort is made to handle duplicates. The first matching keyid is used to
calculate the return result.
'''
# Convert key id to 'RPM' form
keyid = keyIdToRPMVer(keyid)
# Search
for hdr in ts.dbMatch('name', 'gpg-pubkey'):
if hdr['version'] == keyid:
installedts = int(hdr['release'], 16)
if installedts == timestamp:
return 0
elif installedts < timestamp:
return 1
else:
return 2
return -1
def import_key_to_pubring(rawkey, keyid, cachedir=None, gpgdir=None, make_ro_copy=True):
# FIXME - cachedir can be removed from this method when we break api
if gpgme is None:
return False
if not gpgdir:
gpgdir = '%s/gpgdir' % cachedir
if not os.path.exists(gpgdir):
os.makedirs(gpgdir)
key_fo = StringIO(rawkey)
os.environ['GNUPGHOME'] = gpgdir
# import the key
ctx = gpgme.Context()
fp = open(os.path.join(gpgdir, 'gpg.conf'), 'wb')
fp.write('')
fp.close()
ctx.import_(key_fo)
key_fo.close()
# ultimately trust the key or pygpgme is definitionally stupid
k = ctx.get_key(keyid)
gpgme.editutil.edit_trust(ctx, k, gpgme.VALIDITY_ULTIMATE)
if make_ro_copy:
rodir = gpgdir + '-ro'
if not os.path.exists(rodir):
os.makedirs(rodir, mode=0755)
for f in glob.glob(gpgdir + '/*'):
basename = os.path.basename(f)
ro_f = rodir + '/' + basename
shutil.copy(f, ro_f)
os.chmod(ro_f, 0755)
fp = open(rodir + '/gpg.conf', 'w', 0755)
# yes it is this stupid, why do you ask?
opts="""lock-never
no-auto-check-trustdb
trust-model direct
no-expensive-trust-checks
no-permission-warning
preserve-permissions
"""
fp.write(opts)
fp.close()
return True
def return_keyids_from_pubring(gpgdir):
if gpgme is None or not os.path.exists(gpgdir):
return []
os.environ['GNUPGHOME'] = gpgdir
ctx = gpgme.Context()
keyids = []
for k in ctx.keylist():
for subkey in k.subkeys:
if subkey.can_sign:
keyids.append(subkey.keyid)
return keyids
def valid_detached_sig(sig_file, signed_file, gpghome=None):
"""takes signature , file that was signed and an optional gpghomedir"""
if gpgme is None:
return False
if gpghome:
if not os.path.exists(gpghome):
return False
os.environ['GNUPGHOME'] = gpghome
if hasattr(sig_file, 'read'):
sig = sig_file
else:
sig = open(sig_file, 'r')
if hasattr(signed_file, 'read'):
signed_text = signed_file
else:
signed_text = open(signed_file, 'r')
plaintext = None
ctx = gpgme.Context()
try:
sigs = ctx.verify(sig, signed_text, plaintext)
except gpgme.GpgmeError, e:
return False
else:
if not sigs:
return False
# is there ever a case where we care about a sig beyond the first one?
thissig = sigs[0]
if not thissig:
return False
if thissig.validity in (gpgme.VALIDITY_FULL, gpgme.VALIDITY_MARGINAL,
gpgme.VALIDITY_ULTIMATE):
return True
return False
def getCacheDir(tmpdir='/var/tmp', reuse=True, prefix='yum-'):
"""return a path to a valid and safe cachedir - only used when not running
as root or when --tempcache is set"""
uid = os.geteuid()
try:
usertup = pwd.getpwuid(uid)
username = usertup[0]
# we prefer ascii-only paths
username = urllib.quote(username)
except KeyError:
return None # if it returns None then, well, it's bollocksed
if reuse:
# check for /var/tmp/yum-username-* -
prefix = '%s%s-' % (prefix, username)
dirpath = '%s/%s*' % (tmpdir, prefix)
cachedirs = sorted(glob.glob(dirpath))
for thisdir in cachedirs:
stats = os.lstat(thisdir)
if S_ISDIR(stats[0]) and S_IMODE(stats[0]) == 448 and stats[4] == uid:
return thisdir
# make the dir (tempfile.mkdtemp())
cachedir = tempfile.mkdtemp(prefix=prefix, dir=tmpdir)
return cachedir
def sortPkgObj(pkg1 ,pkg2):
"""sorts a list of yum package objects by name"""
if pkg1.name > pkg2.name:
return 1
elif pkg1.name == pkg2.name:
return 0
else:
return -1
def newestInList(pkgs):
""" Return the newest in the list of packages. """
ret = [ pkgs.pop() ]
newest = ret[0]
for pkg in pkgs:
if pkg.verGT(newest):
ret = [ pkg ]
newest = pkg
elif pkg.verEQ(newest):
ret.append(pkg)
return ret
def version_tuple_to_string(evrTuple):
"""
Convert a tuple representing a package version to a string.
@param evrTuple: A 3-tuple of epoch, version, and release.
Return the string representation of evrTuple.
"""
(e, v, r) = evrTuple
s = ""
if e not in [0, '0', None]:
s += '%s:' % e
if v is not None:
s += '%s' % v
if r is not None:
s += '-%s' % r
return s
def prco_tuple_to_string(prcoTuple):
"""returns a text string of the prco from the tuple format"""
(name, flag, evr) = prcoTuple
flags = {'GT':'>', 'GE':'>=', 'EQ':'=', 'LT':'<', 'LE':'<='}
if flag is None:
return name
return '%s %s %s' % (name, flags[flag], version_tuple_to_string(evr))
def string_to_prco_tuple(prcoString):
"""returns a prco tuple (name, flags, (e, v, r)) for a string"""
if type(prcoString) == types.TupleType:
(n, f, v) = prcoString
else:
n = prcoString
f = v = None
# We love GPG keys as packages, esp. awesome provides like:
# gpg(Fedora (13) <fedora@fedoraproject.org>)
if n[0] != '/' and not n.startswith("gpg("):
# not a file dep - look at it for being versioned
prco_split = n.split()
if len(prco_split) == 3:
n, f, v = prco_split
# now we have 'n, f, v' where f and v could be None and None
if f is not None and f not in constants.LETTERFLAGS:
if f not in constants.SYMBOLFLAGS:
try:
f = flagToString(int(f))
except (ValueError,TypeError), e:
raise Errors.MiscError, 'Invalid version flag: %s' % f
else:
f = constants.SYMBOLFLAGS[f]
if type(v) in (types.StringType, types.NoneType, types.UnicodeType):
(prco_e, prco_v, prco_r) = stringToVersion(v)
elif type(v) in (types.TupleType, types.ListType):
(prco_e, prco_v, prco_r) = v
#now we have (n, f, (e, v, r)) for the thing specified
return (n, f, (prco_e, prco_v, prco_r))
def refineSearchPattern(arg):
"""Takes a search string from the cli for Search or Provides
and cleans it up so it doesn't make us vomit"""
if re.search('[*{}?+]|\[.+\]', arg):
restring = fnmatch.translate(arg)
else:
restring = re.escape(arg)
return restring
def _decompress_chunked(source, dest, ztype):
if ztype not in _available_compression:
msg = "%s compression not available" % ztype
raise Errors.MiscError, msg
if ztype == 'bz2':
s_fn = bz2.BZ2File(source, 'r')
elif ztype == 'xz':
s_fn = lzma.LZMAFile(source, 'r')
elif ztype == 'gz':
s_fn = gzip.GzipFile(source, 'r')
destination = open(dest, 'w')
while True:
try:
data = s_fn.read(1024000)
except (OSError, IOError, EOFError), e:
msg = "Error reading from file %s: %s" % (source, str(e))
raise Errors.MiscError, msg
if not data: break
try:
destination.write(data)
except (OSError, IOError), e:
msg = "Error writing to file %s: %s" % (dest, str(e))
raise Errors.MiscError, msg
destination.close()
s_fn.close()
def bunzipFile(source,dest):
""" Extract the bzipped contents of source to dest. """
_decompress_chunked(source, dest, ztype='bz2')
def get_running_kernel_pkgtup(ts):
"""This takes the output of uname and figures out the pkgtup of the running
kernel (name, arch, epoch, version, release)."""
ver = os.uname()[2]
# we glob for the file that MIGHT have this kernel
# and then look up the file in our rpmdb.
fns = sorted(glob.glob('/boot/vmlinuz*%s*' % ver))
for fn in fns:
mi = ts.dbMatch('basenames', fn)
for h in mi:
e = h['epoch']
if h['epoch'] is None:
e = '0'
else:
e = str(e)
return (h['name'], h['arch'], e, h['version'], h['release'])
return (None, None, None, None, None)
def get_running_kernel_version_release(ts):
"""This takes the output of uname and figures out the (version, release)
tuple for the running kernel."""
pkgtup = get_running_kernel_pkgtup(ts)
if pkgtup[0] is not None:
return (pkgtup[3], pkgtup[4])
return (None, None)
def find_unfinished_transactions(yumlibpath='/var/lib/yum'):
"""returns a list of the timestamps from the filenames of the unfinished
transactions remaining in the yumlibpath specified.
"""
timestamps = []
tsallg = '%s/%s' % (yumlibpath, 'transaction-all*')
tsdoneg = '%s/%s' % (yumlibpath, 'transaction-done*')
tsalls = glob.glob(tsallg)
tsdones = glob.glob(tsdoneg)
for fn in tsalls:
if fn.endswith('disabled'):
continue
trans = os.path.basename(fn)
timestamp = trans.replace('transaction-all.','')
timestamps.append(timestamp)
timestamps.sort()
return timestamps
def find_ts_remaining(timestamp, yumlibpath='/var/lib/yum'):
"""this function takes the timestamp of the transaction to look at and
the path to the yum lib dir (defaults to /var/lib/yum)
returns a list of tuples(action, pkgspec) for the unfinished transaction
elements. Returns an empty list if none.
"""
to_complete_items = []
tsallpath = '%s/%s.%s' % (yumlibpath, 'transaction-all', timestamp)
tsdonepath = '%s/%s.%s' % (yumlibpath,'transaction-done', timestamp)
tsdone_items = []
if not os.path.exists(tsallpath):
# something is wrong, here, probably need to raise _something_
return to_complete_items
if os.path.exists(tsdonepath):
tsdone_fo = open(tsdonepath, 'r')
tsdone_items = tsdone_fo.readlines()
tsdone_fo.close()
tsall_fo = open(tsallpath, 'r')
tsall_items = tsall_fo.readlines()
tsall_fo.close()
for item in tsdone_items:
# this probably shouldn't happen but it's worth catching anyway
if item not in tsall_items:
continue
tsall_items.remove(item)
for item in tsall_items:
item = item.replace('\n', '')
if item == '':
continue
try:
(action, pkgspec) = item.split()
except ValueError, e:
msg = "Transaction journal file %s is corrupt." % (tsallpath)
raise Errors.MiscError, msg
to_complete_items.append((action, pkgspec))
return to_complete_items
def seq_max_split(seq, max_entries):
""" Given a seq, split into a list of lists of length max_entries each. """
ret = []
num = len(seq)
seq = list(seq) # Trying to use a set/etc. here is bad
beg = 0
while num > max_entries:
end = beg + max_entries
ret.append(seq[beg:end])
beg += max_entries
num -= max_entries
ret.append(seq[beg:])
return ret
_deletechars = ''.join(chr(i) for i in range(32) if i not in (9, 10, 13))
def to_xml(item, attrib=False):
""" Returns xml-friendly utf-8 encoded string.
Accepts utf-8, iso-8859-1, or unicode.
"""
if type(item) is str:
# check if valid utf8
try: unicode(item, 'utf-8')
except UnicodeDecodeError:
# assume iso-8859-1
item = unicode(item, 'iso-8859-1').encode('utf-8')
elif type(item) is unicode:
item = item.encode('utf-8')
elif item is None:
return ''
else:
raise ValueError, 'String expected, got %s' % repr(item)
# compat cruft...
item = item.rstrip()
# kill ivalid low bytes
item = item.translate(None, _deletechars)
# quote reserved XML characters
item = item.replace('&', '&')
item = item.replace('<', '<')
item = item.replace('>', '>')
if attrib:
item = item.replace('"', '"')
item = item.replace("'", ''')
return item
def unlink_f(filename):
""" Call os.unlink, but don't die if the file isn't there. This is the main
difference between "rm -f" and plain "rm". """
try:
os.unlink(filename)
except OSError, e:
if e.errno not in (errno.ENOENT, errno.EPERM, errno.EACCES, errno.EROFS):
raise
def stat_f(filename, ignore_EACCES=False):
""" Call os.stat(), but don't die if the file isn't there. Returns None. """
try:
return os.stat(filename)
except OSError, e:
if e.errno in (errno.ENOENT, errno.ENOTDIR):
return None
if ignore_EACCES and e.errno == errno.EACCES:
return None
raise
def _getloginuid():
""" Get the audit-uid/login-uid, if available. None is returned if there
was a problem. Note that no caching is done here. """
# We might normally call audit.audit_getloginuid(), except that requires
# importing all of the audit module. And it doesn't work anyway: BZ 518721
try:
fo = open("/proc/self/loginuid")
except IOError:
return None
data = fo.read()
try:
return int(data)
except ValueError:
return None
_cached_getloginuid = None
def getloginuid():
""" Get the audit-uid/login-uid, if available. None is returned if there
was a problem. The value is cached, so you don't have to save it. """
global _cached_getloginuid
if _cached_getloginuid is None:
_cached_getloginuid = _getloginuid()
return _cached_getloginuid
# ---------- i18n ----------
import locale
def setup_locale(override_codecs=True, override_time=False):
# This test needs to be before locale.getpreferredencoding() as that
# does setlocale(LC_CTYPE, "")
try:
locale.setlocale(locale.LC_ALL, '')
# set time to C so that we output sane things in the logs (#433091)
if override_time:
locale.setlocale(locale.LC_TIME, 'C')
except locale.Error, e:
# default to C locale if we get a failure.
print >> sys.stderr, 'Failed to set locale, defaulting to C'
os.environ['LC_ALL'] = 'C'
locale.setlocale(locale.LC_ALL, 'C')
if override_codecs:
class UnicodeStream:
def __init__(self, stream, encoding):
self.stream = stream
self.encoding = encoding
def write(self, s):
if isinstance(s, unicode):
s = s.encode(self.encoding, 'replace')
self.stream.write(s)
def __getattr__(self, name):
return getattr(self.stream, name)
sys.stdout = UnicodeStream(sys.stdout, locale.getpreferredencoding())
def get_my_lang_code():
try:
mylang = locale.getlocale(locale.LC_MESSAGES)
except ValueError, e:
# This is RHEL-5 python crack, Eg. en_IN can't be parsed properly
mylang = (None, None)
if mylang == (None, None): # odd :)
mylang = 'C'
else:
mylang = '.'.join(mylang)
return mylang
def return_running_pids():
"""return list of running processids, excluding this one"""
mypid = os.getpid()
pids = []
for fn in glob.glob('/proc/[0123456789]*'):
if mypid == os.path.basename(fn):
continue
pids.append(os.path.basename(fn))
return pids
def get_open_files(pid):
"""returns files open from this pid"""
files = []
maps_f = '/proc/%s/maps' % pid
try:
maps = open(maps_f, 'r')
except (IOError, OSError), e:
return files
for line in maps:
if line.find('fd:') == -1:
continue
line = line.replace('\n', '')
slash = line.find('/')
filename = line[slash:]
filename = filename.replace('(deleted)', '') #only mildly retarded
filename = filename.strip()
if filename not in files:
files.append(filename)
cli_f = '/proc/%s/cmdline' % pid
try:
cli = open(cli_f, 'r')
except (IOError, OSError), e:
return files
cmdline = cli.read()
if cmdline.find('\00') != -1:
cmds = cmdline.split('\00')
for i in cmds:
if i.startswith('/'):
files.append(i)
return files
def get_uuid(savepath):
"""create, store and return a uuid. If a stored one exists, report that
if it cannot be stored, return a random one"""
if os.path.exists(savepath):
return open(savepath, 'r').read()
else:
try:
from uuid import uuid4
except ImportError:
myid = open('/proc/sys/kernel/random/uuid', 'r').read()
else:
myid = str(uuid4())
try:
sf = open(savepath, 'w')
sf.write(myid)
sf.flush()
sf.close()
except (IOError, OSError), e:
pass
return myid
def decompress(filename, dest=None, fn_only=False, check_timestamps=False):
"""take a filename and decompress it into the same relative location.
if the file is not compressed just return the file"""
out = dest
if not dest:
out = filename
if filename.endswith('.gz'):
ztype='gz'
if not dest:
out = filename.replace('.gz', '')
elif filename.endswith('.bz') or filename.endswith('.bz2'):
ztype='bz2'
if not dest:
if filename.endswith('.bz'):
out = filename.replace('.bz','')
else:
out = filename.replace('.bz2', '')
elif filename.endswith('.xz'):
ztype='xz'
if not dest:
out = filename.replace('.xz', '')
else:
return filename # returning the same file since it is not compressed
if check_timestamps:
fi = stat_f(filename)
fo = stat_f(out)
if fi and fo:
# Eliminate sub second precision in mtime before comparison,
# see http://bugs.python.org/issue14127
if int(fo.st_mtime) == int(fi.st_mtime):
return out
if fn_only:
# out exists but not valid
return None
if not fn_only:
try:
_decompress_chunked(filename, out, ztype)
if check_timestamps and fi:
os.utime(out, (fi.st_mtime, fi.st_mtime))
except:
unlink_f(out)
raise
return out
def repo_gen_decompress(filename, generated_name, cached=False):
""" This is a wrapper around decompress, where we work out a cached
generated name, and use check_timestamps. filename _must_ be from
a repo. and generated_name is the type of the file. """
dest = os.path.dirname(filename) + '/gen/' + generated_name
try:
return decompress(filename, dest=dest, check_timestamps=True)
except (OSError, IOError), e:
if cached and e.errno == errno.EACCES:
return None
raise
def read_in_items_from_dot_dir(thisglob, line_as_list=True):
"""takes a glob of a dir (like /etc/foo.d/*.foo)
returns a list of all the lines in all the files matching
that glob, ignores comments and blank lines,
optional paramater 'line_as_list tells whether to
treat each line as a space or comma-separated list, defaults to True"""
results = []
for fname in glob.glob(thisglob):
for line in open(fname):
if re.match('\s*(#|$)', line):
continue
line = line.rstrip() # no more trailing \n's
line = line.lstrip() # be nice
if not line:
continue
if line_as_list:
line = line.replace('\n', ' ')
line = line.replace(',', ' ')
results.extend(line.split())
continue
results.append(line)
return results
__cached_cElementTree = None
def _cElementTree_import():
""" Importing xElementTree all the time, when we often don't need it, is a
huge timesink. This makes python -c 'import yum' suck. So we hide it
behind this function. And have accessors. """
global __cached_cElementTree
if __cached_cElementTree is None:
try:
from xml.etree import cElementTree
except ImportError:
import cElementTree
__cached_cElementTree = cElementTree
def cElementTree_iterparse(filename):
""" Lazily load/run: cElementTree.iterparse """
_cElementTree_import()
return __cached_cElementTree.iterparse(filename)
def cElementTree_xmlparse(filename):
""" Lazily load/run: cElementTree.parse """
_cElementTree_import()
return __cached_cElementTree.parse(filename)
def filter_pkgs_repoid(pkgs, repoid):
""" Given a list of packages, filter them for those "in" the repoid.
uses from_repo for installed packages, used by repo-pkgs commands. """
if repoid is None:
return pkgs
ret = []
for pkg in pkgs:
if pkg.repoid == 'installed':
if 'from_repo' not in pkg.yumdb_info:
continue
if pkg.yumdb_info.from_repo != repoid:
continue
elif pkg.repoid != repoid:
continue
ret.append(pkg)
return ret
def validate_repoid(repoid):
"""Return the first invalid char found in the repoid, or None."""
allowed_chars = string.ascii_letters + string.digits + '-_.:'
for char in repoid:
if char not in allowed_chars:
return char
else:
return None
def disk_usage(path):
"""Return disk usage of the given filename, recursively for dirs."""
def usage(path):
return os.stat(path).st_blocks * 512
total = usage(path)
if not os.path.isdir(path):
return total
for root, dirs, files in os.walk(path):
paths = (os.path.join(root, entry) for entry in dirs + files)
total += sum(usage(path) for path in paths)
return total
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