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2016-08-17support compression and by-hash for .diff/Index filesDavid Kalnischkies
In af81ab9030229b4ce6cbe28f0f0831d4896fda01 by-hash got implemented as a special compression type for our usual index files like Packages. Missing in this scheme was the special .diff/Index index file containing the info about individual patches for this index file. Deriving from the index file class directly we inherent the compression handling infrastructure and in this way also by-hash nearly for free. Closes: #824926
2016-08-17support getting only-uncompressed files via by-hashDavid Kalnischkies
The URI we later want to modify to get the file via by-hash was unset in case a file was only available uncompressed (which is usually not the case) causing an acquire error.
2016-08-17set the correct item FileSize in by-hash caseDavid Kalnischkies
In af81ab9030229b4ce6cbe28f0f0831d4896fda01 we implement by-hash as a special compression type, which breaks this filesize setting as the code is looking for a foobar.by-hash file then. Dealing this slightly gets us the intended value. Note that this has no direct effect as this value will be set in other ways, too, and could only effect progress reporting. Gbp-Dch: Ignore
2016-08-17retry without same redirection mirror on 404 errorsDavid Kalnischkies
If 9b8034a9fd40b4d05075fda719e61f6eb4c45678 serves the Release files from a partial mirror we will end up getting 404 for some of the indexes. Instead of giving up, we will instead ignore our same redirection mirror constrain and ask the redirection service as a potential hashsum mismatch is better than keeping the certain 404 error.
2016-08-17check internal redirections for loops, tooDavid Kalnischkies
Now that we have the redirections loopchecker centrally in our items we can use it also to prevent internal redirections to loop caused by bugs as in a few instances we get into the business of rewriting the URI we will query by ourself as we predict we would see such a redirect anyway. Our code has no bugs of course, hence no practical difference. ;) Gbp-Dch: Ignore
2016-08-16log with the failed item description, not with next tryDavid Kalnischkies
The failure handling frequently changes URI & Description of the failed item to try a slightly different combination which might work, but the logging of the failure happens only afterwards as the same failure handling decides if this is a critical error or not so we need a backup here instead of potentially new content. A purely cosmetic issue, but can still be confusing for humans.
2016-08-12drop incorrect const attribute from DirectoryExistsDavid Kalnischkies
Since its existence in 2010 DirectoryExists was always marked with this attribute, but for no real reason. Arguably a check for the existence of the file is not modifying global state, so theoretically this shouldn't be a problem. It is wrong from a logical point of view through as between two calls the directory could be created so the promise we made to the compiler that it could remove the second call would be wrong, so API wise it is wrong. It's a bit mysterious that this is only observeable on ppc64el and can be fixed by reordering code ever so slightly, but in the end its more our fault for adding this attribute than the compilers fault for doing something silly based on the attribute. LP: 1473674
2016-08-12fileutl: empty file support: Avoid fstat() on -1 fd and check resultJulian Andres Klode
When checking if a file is empty, we forget to check that fstat() actually worked.
2016-08-12ensure a good clock() value for usage and testsDavid Kalnischkies
We use clock() as a very cheap way of getting a "random" value, but the manpage warns that this could return -1, so we should be dealing with this. Additionally, e.g. on hurd-i386 the value increases only slowly – to slow for our fast running tests for randomness hence producing the same range in both samples, so we introduce a simple busy-wait loop (as clock is counting processor time used by the program) in the test which delays the second sample just enough making our randomness a bit more predictable.
2016-08-12don't perform int<float in progress bar drawingDavid Kalnischkies
Comparing floating numbers is always fun and in this instance a 9 < 9.0 is "somehow" true on hurd-i386 letting the tests fail by reporting that too much progress achieved. A bit mysterious, but with some rework we can use code which avoids dealing with the floats in this way entirely and make our testcases happy.
2016-08-11Merge branch 'feature/apt-dpkg-comm'David Kalnischkies
2016-08-11Merge branch 'feature/methods'David Kalnischkies
2016-08-10disable explicit configuration of all packages at the endDavid Kalnischkies
With b4450f1dd6bca537e60406b2383ab154a3e1485f we dropped what we calculated here later on and now that we don't need it in the meantime either we can just skip the busy work by default and expect dpkg to do the right thing dropping also our little "last explicit configures" removal trick introduced in b4450f1dd6bca537e60406b2383ab154a3e1485f. This enables the last of a bunch of previously experimental options, some of them existing still, but are very special and hence not really worth documenting anymore (especially as it would need to be rewritten now entirely) which is why the documentation is nearly completely dropped. The order of configuration stanzas in the simulation code changes slightly as it isn't concerning itself with finding the 'right' order, but any order is valid anyhow as long as the entire set happens in the same call.
2016-08-10simulate all package manager actions explicitlyDavid Kalnischkies
If a planner lets actions to be figured out by dpkg in pending calls these actions aren't mentioned in a simulation. While that might be a good thing for debugging, it would be a change in behavior and especially if a planner avoids explicit removals could be confusing for users. As such we perform the same 'trick' as in the dpkg implementation by performing explicitly what would be done by the pending calls. To save us some work and avoid desyncs we perform a layer violation by using deb/ code in the generic simulation – and further we perform ugly dynamic_cast to avoid breaking the ABI for nothing; aptitude is the only other user of the simulation class according to codesearch.d.n and for that our little trick works. It just isn't working if you happen to extend pkgSimulate or otherwise manage to call the protected Go methods directly – which isn't very realistic/practical.
2016-08-10try to avoid removal of crossgraded packagesDavid Kalnischkies
The user has to approve the removal of a crossgraded package as it might be needed to remove it (temporarily) in the process, but in most cases we can happily avoid it and let dpkg unpack over it skipping the remove. This has some effects on progress reporting and how deal with selections through which makes this a tiny bit complicated.
2016-08-10allow user@host (aka: no password) in URI parsingDavid Kalnischkies
If the URI had no password the username was ignored
2016-08-10allow methods to be disabled and redirected via configDavid Kalnischkies
To prevent accidents like adding http-sources while using tor+http it can make sense to allow disabling methods. It might even make sense to allow "redirections" and adding "symlinked" methods via configuration. This could e.g. allow using different options for certain sources by adding and configuring a "virtual" new method which picks up the config based on the name it was called with like e.g. http does if called as tor+http.
2016-08-10implement socks5h proxy support for http methodDavid Kalnischkies
Socks support is a requested feature in sofar that the internet is actually believing Acquire::socks::Proxy would exist. It doesn't and this commit isn't adding it as that isn't how our configuration works, but it allows Acquire::http::Proxy="socks5h://…". The HTTPS method was changed already to support socks proxies (all versions) via curl. This commit implements only SOCKS5 (RFC1928) with no auth or pass&user auth (RFC1929), but not GSSAPI which is required by the RFC. The 'h' in the protocol name further indicates that DNS resolution is delegated to the socks proxy rather than performed locally. The implementation works and was tested with Tor as socks proxy for which implementing socks5h only can actually be considered a feature. Closes: 744934
2016-08-10detect redirection loops in acquire instead of workersDavid Kalnischkies
Having the detection handled in specific (http) workers means that a redirection loop over different hostnames isn't detected. Its also not a good idea have this implement in each method independently even if it would work
2016-08-10suggest transport-packages based on established nameschemeDavid Kalnischkies
apt-transports not shipped in apt directly are usually named apt-transport-% with % being what is in the name of the transport. tor additional introduced aliases via %+something, which isn't a bad idea, so be strip the +something part from the method name before suggesting the installation of an apt-transport-% package. This avoids us the maintainance of a list of existing transports creating a two class system of known and unknown transports which would be quite arbitrary and is unfriendly to backports.
2016-08-10ensure all removes are reported to hook scriptsDavid Kalnischkies
Same reason and implementation as for configure.
2016-08-10ensure all configures are reported to hook scriptsDavid Kalnischkies
A planner might not explicitly configure all packages, but we need to know all packages which will be configured for progress reporting and to tell the hook scripts about them as they rely on this for their own functionality.
2016-08-10don't purge directly, but remove and do purge at the endDavid Kalnischkies
If we want a package to be purged from the system tell dpkg in the ordering (if it has to touch it explicitly) to remove it and cover the purging of the config files at the end with a --purge --pending call. That should help packages move conffiles around between packages correctly even if the user is purging packages directly in big actions like dist-upgrades involving many packages.
2016-08-10call dpkg with --no-triggers by defaultDavid Kalnischkies
Implemented a long while ago now with relatively good progress reporting involving triggers is a good time to try delaying the execution of triggers across dpkg invocations finally by default. Note: The bugreport talks also about 'smarter' configuration which is a much bigger part and approached from multiple directions, but doesn't really involve triggers per-se so considering it decoupled should help in getting it done… Closes: #626599
2016-08-10select remove/purge packages early on for dpkgDavid Kalnischkies
Telling dpkg early on that we are going to remove these packages later helps it with auto-deconfiguration decisions and its another area where a planner can ignore the nitty gritty details and let dpkg decide the course of action if there are no special requirements.
2016-08-10save and restore selection states before/after calling dpkgDavid Kalnischkies
dpkg decides certain things on its own based on selections and especially if we want to call --pending on purge/remove actions, we need to ensure a clean slate or otherwise we surprise the user by removing packages we weren't allowed to remove by the user in this run (the selection might be an overarching plan for the not-yet "future"). Ideally dpkg would have some kind of temporal selection interface for this case, but it hasn't, so we make it temporal with the risk of loosing state if we don't manage to restore them.
2016-08-10use dpkg --unpack --recursive to avoid long cmdlinesDavid Kalnischkies
Having long commandlines split into two is a huge problem if it happens and additionally if we want to introduce planners which perform less micromanagment its a good idea to leave the details for dpkg to decide. In practice this doesn't work yet unconditionally as a bug is hiding in the ordering code of dpkg, but it works if apt imposes its ordering so this commit allows for now at least to solve the first problem.
2016-08-10pass --force-remove-essential to dpkg only if neededDavid Kalnischkies
APT (usually) knows which package is essential or not, so we can avoid passing this force flag to dpkg unconditionally if the user hasn't chosen a non-default essential handling obscuring the information.
2016-08-10Merge branch 'cmake'Julian Andres Klode
2016-08-10Get rid of the old buildsystemJulian Andres Klode
Bye, bye, old friend.
2016-08-10CMake: Check for ptsname_r() againJulian Andres Klode
This was dropped in autotools as I found no use of the HAVE_PTSNAME_R macro. Turns out it was typoed as HAVE_PTS_NAME_R. Fix the #ifdef and add checks to CMake for it. Closes: #833674
2016-08-07Handle interrupt when running Pre-Install hooksJulian Andres Klode
If we receive an interrupt, set a flag and do not abort immediately without waiting for the child. Once the child exited, exit with an error if the interrupted flag is set. Closes: #832593
2016-08-06CMake: Add basic CMake build systemJulian Andres Klode
Introduce an initial CMake buildsystem. This build system can build a fully working apt system without translation or documentation. The FindBerkelyDB module is from kdelibs, with some small adjustements to also look in db5 directories. Initial work on this CMake build system started in 2009, and was resumed in August 2016.
2016-08-03ExecGPGV: Pass current config state to apt-key via temp fileJulian Andres Klode
Create a temporary configuration file with a dump of our configuration and pass that to apt-key. LP: #1607283
2016-08-03ExecGPGV: Fork in all casesJulian Andres Klode
2016-08-03ExecGPGV: Rework file removal on exit()Julian Andres Klode
Create a local exiter object which cleans up files on exit.
2016-08-03gpgv: Unlink the correct temp file in error caseJulian Andres Klode
Previously, when data could be created and sig not, we would unlink sig, not data (and vice versa).
2016-07-30prevent C++ locale number formatting in text APIs (try 2)David Kalnischkies
Followup of b58e2c7c56b1416a343e81f9f80cb1f02c128e25. Still a regression of sorts of 8b79c94af7f7cf2e5e5342294bc6e5a908cacabf. Closes: 832044
2016-07-29edsp: try to read responses even if writing failedDavid Kalnischkies
If a solver/planner exits before apt is done writing we will generate write errors. Solvers like 'dump' can be pretty quick in failing but produce a valid EDSP error report apt should read, parse and display instead of just discarding even through we had write errors.
2016-07-29if the FileFd failed already following calls should fail, tooDavid Kalnischkies
There is no point in trying to perform Write/Read on a FileFd which already failed as they aren't going to work as expected, so we should make sure that they fail early on and hard.
2016-07-27(error) va_list 'args' was opened but not closed by va_end()David Kalnischkies
Reported-By: cppcheck Gbp-Dch: Ignore
2016-07-27eipp: avoid producing file warnings in simulationDavid Kalnischkies
Simulations are frequently run by unprivileged users which naturally don't have the permissions to write to the default location for the eipp file. Either way is bad as running in simulation mode doesn't mean we don't want to run the logging (as EIPP runs the same regardless of simulation or 'real' run), but showing the warnings is relatively pointless in the default setup, so, in case we would produce errors and perform a simulation we will discard the warnings and carry on. Running apt with an external planner wouldn't have generated these messages btw. Closes: 832614
2016-07-27rred: truncate result file before writing to itDavid Kalnischkies
If another file in the transaction fails and hence dooms the transaction we can end in a situation in which a -patched file (= rred writes the result of the patching to it) remains in the partial/ directory. The next apt call will perform the rred patching again and write its result again to the -patched file, but instead of starting with an empty file as intended it will override the content previously in the file which has the same result if the new content happens to be longer than the old content, but if it isn't parts of the old content remain in the file which will pass verification as the new content written to it matches the hashes and if the entire transaction passes the file will be moved the lists/ directory where it might or might not trigger errors depending on if the old content which remained forms a valid file together with the new content. This has no real security implications as no untrusted data is involved: The old content consists of a base file which passed verification and a bunch of patches which all passed multiple verifications as well, so the old content isn't controllable by an attacker and the new one isn't either (as the new content alone passes verification). So the best an attacker can do is letting the user run into the same issue as in the report. Closes: #831762
2016-07-26verify hash of input file in rredDavid Kalnischkies
We read the entire input file we want to patch anyhow, so we can also calculate the hash for that file and compare it with what he had expected it to be. Note that this isn't really a security improvement as a) the file we patch is trusted & b) if the input is incorrect, the result will hardly be matching, so this is just for failing slightly earlier with a more relevant error message (althrough, in terms of rred its ignored and complete download attempt instead).
2016-07-23call flush on the wrapped writebuffered FileFdDavid Kalnischkies
The flush call is a no-op in most FileFd implementations so this isn't as critical as it might sound as the only non-trivial implementation is in the buffered writer, which tends not be used to buffer another buffer…
2016-07-22report progress for triggered actionsDavid Kalnischkies
APT doesn't know which packages will be triggered in the course of actions, so it can't plan to see them for progress beforehand, but if it sees that dpkg says that a package was triggered we can add additional states. This is pretty much magic – after all it sets back the progress – and there are cornercases in which this will result in incorrect totals (package in partial states may or may not loose trigger states), but the worst which can happen is that the progress is slightly incorrect and doesn't reach 100%, but so be it. Better than being stuck at 100% for a while as apt isn't realizing that a bunch of triggers still need to be processed.
2016-07-22use a configurable location for apport report storageDavid Kalnischkies
Hardcoding /var/crash means we can't test it properly and it isn't really our style.
2016-07-22report progress for removing while purging pkgsDavid Kalnischkies
The progress reporting for a package sheduled for purging only included the states dpkg passes through while actually purging the package – if the package was fully installed before dpkg will pass first through all remove states before purging it, so in the interest of consistent reporting our progress reporting should do that, too.
2016-07-22support dpkg debug mode in APT::StateChangesDavid Kalnischkies
Gbp-Dch: Ignore
2016-07-22clean up default-stanzas from extended_states on writeDavid Kalnischkies
The existing cleanup was happening only for packages which had a status change (install -> uninstalled) which is the most frequent but no the only case – you can e.g. set autobits explicitly with apt-mark. This would leave stanzas in the states file declaring a package to be manually installed – which is the default value for a package not listed at all, so we can just as well drop it from the file.