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python2.7
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rpmUtils
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transaction.py
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#!/usr/bin/python # # Client code for Update Agent # Copyright (c) 1999-2002 Red Hat, Inc. Distributed under GPL. # # Adrian Likins <alikins@redhat.com> # Some Edits by Seth Vidal <skvidal@phy.duke.edu> # # a couple of classes wrapping up transactions so that we # can share transactions instead of creating new ones all over # import rpm import miscutils read_ts = None ts = None # wrapper/proxy class for rpm.Transaction so we can # instrument it, etc easily class TransactionWrapper: def __init__(self, root='/'): self.ts = rpm.TransactionSet(root) self._methods = ['check', 'order', 'addErase', 'addInstall', 'run', 'pgpImportPubkey', 'pgpPrtPkts', 'problems', 'setFlags', 'setVSFlags', 'setProbFilter', 'hdrFromFdno', 'next', 'clean', '_verifySigs'] self.tsflags = [] self.open = True def __del__(self): # Automatically close the rpm transaction when the reference is lost self.close() def close(self): if self.open: self.ts.closeDB() self.ts = None self.open = False def dbMatch(self, *args, **kwds): if 'patterns' in kwds: patterns = kwds.pop('patterns') else: patterns = [] mi = self.ts.dbMatch(*args, **kwds) for (tag, tp, pat) in patterns: mi.pattern(tag, tp, pat) return mi def __getattr__(self, attr): if attr in self._methods: return self.getMethod(attr) else: raise AttributeError, attr def __iter__(self): return self.ts def getMethod(self, method): # in theory, we can override this with # profile/etc info return getattr(self.ts, method) # push/pop methods so we dont lose the previous # set value, and we can potentiall debug a bit # easier def pushVSFlags(self, flags): self.tsflags.append(flags) self.ts.setVSFlags(self.tsflags[-1]) def popVSFlags(self): del self.tsflags[-1] self.ts.setVSFlags(self.tsflags[-1]) def addTsFlag(self, flag): curflags = self.ts.setFlags(0) self.ts.setFlags(curflags | flag) def getTsFlags(self): curflags = self.ts.setFlags(0) self.ts.setFlags(curflags) return curflags def isTsFlagSet(self, flag): val = self.getTsFlags() return bool(flag & val) def setScriptFd(self, fd): self.ts.scriptFd = fd.fileno() # def addProblemFilter(self, filt): # curfilter = self.ts.setProbFilter(0) # self.ts.setProbFilter(cutfilter | filt) def test(self, cb, conf={}): """tests the ts we've setup, takes a callback function and a conf dict for flags and what not""" origflags = self.getTsFlags() self.addTsFlag(rpm.RPMTRANS_FLAG_TEST) # FIXME GARBAGE - remove once this is reimplemented elsehwere # KEEPING FOR API COMPLIANCE ONLY if conf.get('diskspacecheck') == 0: self.ts.setProbFilter(rpm.RPMPROB_FILTER_DISKSPACE| rpm.RPMPROB_FILTER_DISKNODES) tserrors = self.ts.run(cb.callback, '') self.ts.setFlags(origflags) if tserrors is None: return [] if not tserrors: return ['Unknown error during transaction test in RPM'] reserrors = [] for (descr, (etype, mount, need)) in tserrors: reserrors.append(descr) return reserrors def returnLeafNodes(self, headers=False): """returns a list of package tuples (n,a,e,v,r) that are not required by any other package on the system If headers is True then it will return a list of (header, index) tuples """ req = {} orphan = [] mi = self.dbMatch() if mi is None: # this is REALLY unlikely but let's just say it for the moment return orphan # prebuild the req dict for h in mi: if h['name'] == 'gpg-pubkey': continue if not h[rpm.RPMTAG_REQUIRENAME]: continue tup = miscutils.pkgTupleFromHeader(h) for r in h[rpm.RPMTAG_REQUIRENAME]: if r not in req: req[r] = set() req[r].add(tup) mi = self.dbMatch() if mi is None: return orphan def _return_all_provides(hdr): """ Return all the provides, via yield. """ # These are done one by one, so that we get lazy loading for prov in hdr[rpm.RPMTAG_PROVIDES]: yield prov for prov in hdr[rpm.RPMTAG_FILENAMES]: yield prov for h in mi: if h['name'] == 'gpg-pubkey': continue preq = 0 tup = miscutils.pkgTupleFromHeader(h) for p in _return_all_provides(h): if p in req: # Don't count a package that provides its require s = req[p] if len(s) > 1 or tup not in s: preq = preq + 1 break if preq == 0: if headers: orphan.append((h, mi.instance())) else: orphan.append(tup) return orphan def initReadOnlyTransaction(root='/'): read_ts = TransactionWrapper(root=root) read_ts.pushVSFlags((rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS)) return read_ts
/home/../lib/python2.7/site-packages/procfs/../rpmUtils/transaction.py