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2015-08-11ExecFork: Use /proc/self/fd to determine which files to closeJulian Andres Klode
This significantly reduces the number of files that have to be closed and seems to be faster, despite the additional reads. On systems where /proc/self/fd is not available, we fallback to the old code that closes all file descriptors >= 3. Closes: #764204
2015-08-11Make QItem a subclass of DescItemJulian Andres Klode
CurrentItem previously was a DescItem, so let's make QItem a DescItem to not break things.
2015-08-11Re-introduce None as a deprecated alias for NoJulian Andres Klode
Gbp-Dch: ignore
2015-08-11Drop C++11 elements from headersJulian Andres Klode
2015-08-11Fix an obscure warning from GCCJulian Andres Klode
It complained about the previous code: apt-pkg/sourcelist.cc: In destructor ‘pkgSourceList::~pkgSourceList()’: apt-pkg/sourcelist.cc:278:4: warning: cannot optimize loop, the loop counter may overflow [-Wunsafe-loop-optimizations] for (pkgIndexFile * const File : VolatileFiles) ^ There really cannot be an overflow, though. Rewriting it like this seems to fix it.
2015-08-11Simply ignore cruft in the status files, do not treat it as prio 0Julian Andres Klode
This was broken in case all other sources were < 0.
2015-08-11Replace INT_MIN with std::numeric_limits<int>::minJulian Andres Klode
This should fix travis compilation errors. Gbp-Dch: ignore
2015-08-10initialize PinVers to a nullptrDavid Kalnischkies
This makes test-bug-254770-segfault-if-cache-not-buildable happy. Git-Dch: Ignore
2015-08-10move manual-bit from 'oldlibs' pkg to its dependenciesDavid Kalnischkies
oldlibs used to be in APT::Never-MarkAuto-Sections so that old transition packages can be removed without causing the then (autoinstalled) renamed package to be autoremoved. It isn't ideal through as ideally you want the oldlibs package to be removed after nothing depends on it anymore regardless of if you have once installed it by hand or not – and if you had the package talking over (the dependencies) should carry the manual bit now as they are the real deal now. As an added bonus if the package has no dependencies because it is an oldlibs without a direct replacement you should move away from (like lib1 and lib2 are currently in the archive, but there will hopefully only be lib2 in the release) you get a lib1 marked as auto. If the user still needs the oldlibs package for some reason all he has to do is mark it as manual once as this move is only performed if a installed package changes its section from a not-Move-Autobit-Sections to a Move-Autobit-Sections.
2015-08-10move APT::Never-MarkAuto-Sections handling to MarkDeleteDavid Kalnischkies
Having the handling in MarkInstall means that it just effects installation of the metapackage, but if the dependencies change the new dependencies aren't protected (and the old dependencies are still protected for no 'reason'). Having it in MarkDelete means that if a metapackage is sheduled for removal all its currently installed dependencies are marked as manual, which helps against both as in this case there is no new/old and additionally if a user decides the installation of a metapackage was wrong he can just remove it explicitely avoid the manual marking entirely.
2015-08-10no value for MultiArch field is 'no', not 'none'David Kalnischkies
Git-Dch: Ignore
2015-08-10change to libapt-pkg abi 5.0 with versioned symbolsDavid Kalnischkies
We changed an aweful lot of stuff, so 5.0 is properly better than 4.X as a semantic version and as we are at it lets add some trivial symbol versioning as well: We just mark all exported symbols with the same version for now. This isn't really the proper thing to do as if we add symbols in later versions (with the same abi) they will get the same symbols version, but our .symbols file will protect us from the problems arising from this as it will ensure that a package acutally depends on a version of the abi high enough to include the symbol.
2015-08-10mark again deps of pkgs in APT::Never-MarkAuto-Sections as manualDavid Kalnischkies
In 50ef3344c3afaaf9943142906b2f976a0337d264 (and similar for other branches), while 'fixing' the edgecase of a package being in multiple sections (e.g. moved from libs to oldlibs in newer releases) I accidently broke the feature itself completely by operating on the package itself and no longer on its dependencies… The behaviour isn't ideal in multiple ways, which we are hopefully able to fix with new ideas as mentioned in the buglog, but until then the functionality of this "hack" should be restored. Reported-By: Raphaël Hertzog <hertzog@debian.org> Tested-By: Adam Conrad <adconrad@ubuntu.com> Closes: 793360 LP: 1479207 Thanks: Raphaël Hertzog and Adam Conrad for detailed reports and initial patches
2015-08-10drop extra newline in 'Failed to fetch' and 'GPG error' messageDavid Kalnischkies
I never understood why there is an extra newline in those messages, so now is as good time as any to drop them. Lets see if someone complains with a good reason to keep it…
2015-08-10enhance "hit paywall" error message to mention the probable causeDavid Kalnischkies
Reporting errors from Done() is bad for progress reporting and such, so factoring this out is a good idea and we start with moving the supposed- to-be clearsigned file isn't clearsigned out first – improving the error message in the process as we use the same message for a similar case (NODATA) as this is what I have to look at with the venue wifi at DebCamp and the old errormessage doesn't really say anything.
2015-08-10drop obsolete explicit :none handling in pkgCacheGenDavid Kalnischkies
We archieve the same without the special handling now, so drop this code. Makes supporting this abdomination a little longer bearable as well. Git-Dch: Ignore
2015-08-10parse packages from all architectures into the cacheDavid Kalnischkies
Now that we can dynamically create dependencies and provides as needed rather than requiring to know with which architectures we will deal before running we can allow the listparser to parse all records rather than skipping records of "unknown" architectures. This can e.g. happen if a user has foreign architecture packages in his status file without dpkg knowing about this architecture (or apt configured in this way). A sideeffect is that now arch:all packages are (correctly) recorded as available from any Packages file, not just from the native one – which has its downsides for the resolver as mixed-arch source packages can appear in different architectures at different times, but that is the problem of the resolver and dealing with it in the parser is at best a hack (and also depends on a helpful repository). Another sideeffect is that his allows :none packages to appear in Packages files again as we don't do any kind of checks now, but given that they aren't really supported (anymore) by anyone we can live with that.
2015-08-10eliminate dead file-provides code in cache generationDavid Kalnischkies
The code was never active in production, it just sits there collecting dust and given that it is never tested probably doesn't even work anymore the way it was supposed to be (whatever that was exactly in the first place). So just remove it before I have to "fix" it again next time. Git-Dch: Ignore
2015-08-10elimate duplicated code in pkgIndexFile subclassesDavid Kalnischkies
Trade deduplication of code for a bunch of new virtuals, so it is actually visible how the different indexes behave cleaning up the interface at large in the process. Git-Dch: Ignore
2015-08-10add volatile sources support in libapt-pkgDavid Kalnischkies
Sources are usually defined in sources.list (and co) and are pretty stable, but once in a while a frontend might want to add an additional "source" like a local .deb file to install this package (No support for 'real' sources being added this way as this is a multistep process). We had a hack in place to allow apt-get and apt to pull this of for a short while now, but other frontends are either left in the cold by this and/or the code for it looks dirty with FIXMEs plastering it and has on top of this also some problems (like including these 'volatile' sources in the srcpkgcache.bin file). So the biggest part in this commit is actually the rewrite of the cache generation as it is now potentially a three step process. The biggest problem with adding support now through is that this makes a bunch of previously mostly unusable by externs and therefore hidden classes public, so a bit of further tuneing on this now public API is in order…
2015-08-10just-in-time creation for (explicit) negative depsDavid Kalnischkies
Now that we deal with provides in a more dynamic fashion the last remaining problem is explicit dependencies like 'Conflicts: foo' which have to apply to all architectures, but creating them all at the same time requires us to know all architectures ending up in the cache which isn't needed to be the same set as all foreign architectures. The effect is visible already now through as this prevents the creation of a bunch of virtual packages for arch:all packages and as such also many dependencies, just not very visible if you don't look at the stats… Git-Dch Ignore
2015-08-10just-in-time creation for (implicit) ProvidesDavid Kalnischkies
Expecting the worst is easy to code, but has its disadvantages e.g. by creating package structures which otherwise would have never existed. By creating the provides instead at the time a package structure is added we are well prepared for the introduction of partial architectures, massive amounts of M-A:foreign (and :allowed) and co as far as provides are concerned at least. We have something relatively similar for dependencies already. Many tests are added for both M-A states and the code cleaned to properly support implicit provides for foreign architectures and architectures we 'just' happen to parse. Git-Dch: Ignore
2015-08-10hide implicit deps in apt-cache again by defaultDavid Kalnischkies
Before MultiArch implicits weren't a thing, so they were hidden by default by definition. Adding them for MultiArch solved many problems, but having no reliable way of detecting which dependency (and provides) is implicit or not causes problems everytime we want to output dependencies without confusing our observers with unneeded implementation details. The really notworthy point here is actually that we keep now a better record of how a dependency came to be so that we can later reason about it more easily, but that is hidden so deep down in the library internals that change is more the problems it solves than the change itself.
2015-08-10use a smaller type for flags storage in the cacheDavid Kalnischkies
We store very few flags in the cache, so keeping storage space for 8 is enough for all of them and still leaves a few unused bits remaining for future extensions without wasting bytes for nothing. Git-Dch: Ignore
2015-08-10remove the compatibility markers for 4.13 abiDavid Kalnischkies
We aren't and we will not be really compatible again with the previous stable abi, so lets drop these markers (which never made it into a released version) for good as they have outlived their intend already. Git-Dch: Ignore
2015-08-10link DependencyData structs togetherDavid Kalnischkies
Cache generation needs a way of quickly iterating over the unique potion of the dependencies to be able to share them. By linking them together we can reduce the speed penality (~ 80%) with only a small reduction in saved size (~ 20%). Git-Dch: Ignore
2015-08-10split-up Dependency structDavid Kalnischkies
Having dependency data separated from the link between version/package and the dependency allows use to work on sharing the depdency data a bit as it turns out that many dependencies are in fact duplicates. How many are duplicates various heavily with the sources configured, but for a single Debian release the ballpark is 2 duplicates for each dependency already (e.g. libc6 counts 18410 dependencies, but only 45 unique). Add more releases and the duplicates count only rises to get ~6 for 3 releases. For each architecture a user has configured which given the shear number of dependencies amounts to MBs of duplication. We can cut down on this number, but pay a heavy price for it: In my many releases(3) + architectures(3) test we have a 10% (~ 0.5 sec) increase in cache creationtime, but also 10% less cachesize (~ 10 MB). Further work is needed to rip the whole benefits from this through, so this is just the start. Git-Dch: Ignore
2015-08-10bunch of micro-optimizations for depcacheDavid Kalnischkies
DepCache functions are called a lot, so if we can squeeze some drops out of them for free we should do so. Takes also the opportunity to remove some whitespace errors from these functions. Git-Dch: Ignore
2015-08-10avoid virtual in the iteratorsDavid Kalnischkies
With a bit of trickery and the Curiously recurring template pattern we can free us from our use of virtual in the iterators were it is unneeded bloat as we never deal with pointers to iterators and similar such. Git-Dch: Ignore
2015-08-10show or-groups in not-installed recommends and suggests listsDavid Kalnischkies
Further abstracting our new ShowList allows to use it for containers of strings as well giving us the option to implement an or-groups display for the recommends and suggests lists which is a nice trick given that it also helps with migrating the last remaining other cases of old ShowList.
2015-08-10implement a more generic ShowList methodDavid Kalnischkies
apt-get is displaying various lists of package names, which until now it was building as a string before passing it to ShowList, which inserted linebreaks at fitting points and showed a title if needed, but it never really understood what it was working with. With the help of C++11 the new generic knows not only what it works with, but generates the list on the fly rather than asking for it and potentially discarding parts of the input (= the non-default verbose display). It also doubles as a test for how usable the CacheSets are with C++11. (Not all callers are adapted yet.) Git-Dch: Ignore
2015-08-10rename 'apt-get files' to 'apt-get indextargets'David Kalnischkies
'files' is a bit too generic as a name for a command usually only used programmatically (if at all) by developers, so instead of "wasting" this generic name for this we use "indextargets" which is actually the name of the datastructure the displayed data is stored in. Along with this rename the config options are renamed accordingly.
2015-08-10handle site-changing redirects as mirror changesDavid Kalnischkies
Redirectors like httpredir.debian.org orchestra the download from multiple (hopefully close) mirrors while having only a single central sources.list entry by using redirects. This has the effect that the progress report always shows the source it started with, not the mirror it ends up fetching from, which is especially problematic for error reporting as having a report for a "Hashsum mismatch" for the redirector URI is next to useless as nobody knows which URI it was really fetched from (regardless of it coming from a user or via the report script) from this output alone. You would need to enable debug output and hope for the same situation to arise again… We hence reuse the UsedMirror field of the mirror:// method and detect redirects which change the site and declare this new site as the UsedMirrror (and adapt the description). The disadvantage is that there is no obvious mapping anymore (it is relatively easy to guess through with some experience) from progress lines to sources.list lines, so error messages need to take care to use the Target description (rather than current Item description) if they want to refer to the sources.list entry.
2015-08-10skip .diff/Index acquire if Release file was a hitDavid Kalnischkies
QuereURI already skips the aquire of the real file in such a case, but it can't detect pdiffs this way. Those already have a handling if the file wasn't changed in between two Release files, so we just add an other check for a Release file hit here, too. Git-Dch: Ignore
2015-08-10add c++11 override marker to overridden methodsDavid Kalnischkies
C++11 adds the 'override' specifier to mark that a method is overriding a base class method and error out if not. We hide it in the APT_OVERRIDE macro to ensure that we keep compiling in pre-c++11 standards. Reported-By: clang-modernize -add-override -override-macros Git-Dch: Ignore
2015-08-10implement reverse_iterators for cachesetsDavid Kalnischkies
By further abstracting the iterator templates we can wrap the reverse iterators of the wrapped containers and share code in a way that iterator creating is now more template intensive, but shorter in code. Git-Dch: Ignore
2015-08-10prepare cachesets for -std=c++11David Kalnischkies
The "problem" is mostly in the erase() definitions as they slightly conflict and in pre-c++11 are not uniformly in different containers. By differenciating based on the standard we can provide erase() methods for both standards – and as the method is in a template and inline we don't need to worry about symbols here. The rest is adding wrappings for the new forward_list and unordered_set containers and correcting our iterators to use the same trait as the iterator they are wrapping instead of having all of them be simple forward iterators. This allows the use of specialized algorithms which are picked based on iterator_traits and implementing them all is simple to do as we can declare all methods easily and only if they are called they will generate errors (if the underlying iterator doesn't support these). Git-Dch: Ignore
2015-08-10allow individual targets to be kept compressedDavid Kalnischkies
There is an option to keep all targets (Packages, Sources, …) compressed for a while now, but the all-or-nothing approach is a bit limited for our purposes with additional targets as some of them are very big (Contents) and rarely used in comparison, so keeping them compressed by default can make sense, while others are still unpacked. Most interesting is the copy-change maybe: Copy is used by the acquire system as an uncompressor and it is hence expected that it returns the hashes for the "output", not the input. Now, in the case of keeping a file compressed, the output is never written to disk, but generated in memory and we should still validated it, so for compressed files copy is expected to return the hashes of the uncompressed file. We used to use the config option to enable on-the-fly decompress in the method, but in reality copy is never used in a way where it shouldn't decompress a compressed file to get its hashes, so we can save us the trouble of sending this information to the method and just do it always.
2015-08-10remove the longtime deprecated vendor{,list} stuffDavid Kalnischkies
History suggests that this comes from an earlier apt-secure implementation, but never really became a thing, totally unused and marked as deprecated for "ages" now. Especially as it did nothing even if it would have been used (libapt itself didn't use it at all).
2015-08-10implement Signed-By option for sources.listDavid Kalnischkies
Limits which key(s) can be used to sign a repository. Not immensely useful from a security perspective all by itself, but if the user has additional measures in place to confine a repository (like pinning) an attacker who gets the key for such a repository is limited to its potential and can't use the key to sign its attacks for an other (maybe less limited) repository… (yes, this is as weak as it sounds, but having the capability might come in handy for implementing other stuff later).
2015-08-10add sources.list Check-Valid-Until and Valid-Until-{Max,Min} optionsDavid Kalnischkies
These options could be set via configuration before, but the connection to the actual sources is so strong that they should really be set in the sources.list instead – especially as this can be done a lot more specific rather than e.g. disabling Valid-Until for all sources at once. Valid-Until-* names are chosen instead of the Min/Max-ValidTime as this seems like a better name and their use in the wild is probably low enough that this isn't going to confuse anyone if we have to names for the same thing in different areas. In the longrun, the config options should be removed, but for now documentation hinting at the new options is good enough as these are the kind of options you set once across many systems with different apt versions, so the new way should work everywhere first before we deprecate the old way.
2015-08-10merge indexRecords into metaIndexDavid Kalnischkies
indexRecords was used to parse the Release file – mostly the hashes – while metaIndex deals with downloading the Release file, storing all indexes coming from this release and … parsing the Release file, but this time mostly for the other fields. That wasn't a problem in metaIndex as this was done in the type specific subclass, but indexRecords while allowing to override the parsing method did expect by default a specific format. APT isn't really supporting different types at the moment, but this is a violation of the abstraction we have everywhere else and, which is the actual reason for this merge: Options e.g. coming from the sources.list come to metaIndex naturally, which needs to wrap them up and bring them into indexRecords, so the acquire system is told about it as they don't get to see the metaIndex, but they don't really belong in indexRecords as this is just for storing data loaded from the Release file… the result is a complete mess. I am not saying it is a lot prettier after the merge, but at least adding new options is now slightly easier and there is just one place responsible for parsing the Release file. That can't hurt.
2015-08-10detect and error out on conflicting Trusted settingsDavid Kalnischkies
A specific trust state can be enforced via a sources.list option, but it effects all entries handled by the same Release file, not just the entry it was given on so we enforce acknowledgement of this by requiring the same value to be (not) set on all such entries.
2015-08-10bring back deb822 sources.list entries as .sourcesDavid Kalnischkies
Having two different formats in the same file is very dirty and causes external tools to fail hard trying to parse them. It is probably not a good idea for them to parse them in the first place, but they do and we shouldn't break them if there is a better way. So we solve this issue for now by giving our deb822 format a new filename extension ".sources" which unsupporting applications are likely to ignore an can begin gradually moving forward rather than waiting for the unknown applications to catch up. Currently and for the forseeable future apt is going to support both with the same feature set as documented in the manpage, with the longtime plan of adopting the 'new' format as default, but that is a long way to go and might get going more from having an easier time setting options than from us pushing it explicitely.
2015-08-10support lang= and target= sources.list optionsDavid Kalnischkies
We support arch= for a while, now we finally add lang= as well and as a first simple way of controlling which targets to acquire also target=. This asked for a redesign of the internal API of parsing and storing information about 'deb' and 'deb-src' lines. As this API isn't visible to the outside no damage done through. Beside being a nice cleanup (= it actually does more in less lines) it also provides us with a predictable order of architectures as provides in the configuration rather than based on string sorting-order, so that now the native architecture is parsed/displayed first. Observeable e.g. in apt-get output.
2015-08-10fix memory leaks reported by -fsanitizeDavid Kalnischkies
Various small leaks here and there. Nothing particularily big, but still good to fix. Found by the sanitizers while running our testcases. Reported-By: gcc -fsanitize Git-Dch: Ignore
2015-08-10some CXXFLAGS housekeepingDavid Kalnischkies
More warnings are always better. Git-Dch: Ignore
2015-08-10simplify Origin matchmaking for status filesDavid Kalnischkies
The old check is overly complicated nowadays as we have a pretty defining difference between packages from a Packages files coming from with a Release file (even if the file itself doesn't exist) and packages coming from the dpkg.status or directly out of *.deb's as these have no associated Release file. Git-Dch: Ignore
2015-08-10cleanup Container.erase API to look more like std::containersDavid Kalnischkies
C++11 slightly changes the API again to const_iterator, but we are find with iterators in the C++03 style for now as long as they look and behave equally to the methods of the standard containers. Git-Dch: Ignore
2015-08-10make all d-pointer * const pointersDavid Kalnischkies
Doing this disables the implicit copy assignment operator (among others) which would cause hovac if used on the classes as it would just copy the pointer, not the data the d-pointer points to. For most of the classes we don't need a copy assignment operator anyway and in many classes it was broken before as many contain a pointer of some sort. Only for our Cacheset Container interfaces we define an explicit copy assignment operator which could later be implemented to copy the data from one d-pointer to the other if we need it. Git-Dch: Ignore