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2018-08-07Add support for dpkg frontend lockJulian Andres Klode
The dpkg frontend lock is a lock dpkg tries to acquire except if the frontend already acquires it. This fixes a race condition in the install command where the dpkg lock is not held for a short period of time between different dpkg invocations. For this reason we also define an environment variable DPKG_FRONTEND_LOCKED for dpkg invocations so dpkg knows not to try to acquire the frontend lock because it's held by a parent process. We can set DPKG_FRONTEND_LOCKED only if the frontend lock really is held; that is, if our lock count is greater than 0 - otherwise an apt client not using the LockInner family of functions would run dpkg without the frontend lock set, but with DPKG_FRONTEND_LOCKED set. Such a process has a weaker guarantee: Because dpkg would not lock the frontend lock either, the process is prone to the existing races, and, more importantly, so is a new style process. Closes: #869546 [fixups: fix error messages, add public IsLocked() method, and make {Un,}LockInner return an error on !debSystem]
2018-06-27Handle JSON hooks that just close the file/exit and fix some other errorsJulian Andres Klode
JSON hooks might disappear and the common idiom to work around hooks disappearing is to check for the hook in the shell snippet that is in the apt.conf file and if it does not exist, do nothing. This caused APT to fail however, expecting it to acknowledge the handshake. Ignoring ECONNRESET on handshakes solves the problem. The error case, and the other error cases also did not stop execution of the hook, causing more errors to pile up. Fix this by directly going to the closing part of the code. LP: #1776218
2018-05-11Support local files as arguments in show commandDavid Kalnischkies
Now that --with-source is supported in show we can go a little further and add the "syntactic sugar" of supporting deb-files on the commandline directly to give users an alternative to remembering dpkg -I for deb files & as a bonus apt also works on changes files. Most of the code churn is actually to deal with cases probably not too common in reality like mixing packages and deb-files on the commandline and getting the right order for these multiple records. Closes: 883206
2018-05-11Support --with-source in show & search commandsDavid Kalnischkies
2018-05-11Support release selector for volatile files as wellDavid Kalnischkies
The syntax is a bit awkward, but it is the same as for a package name and introducing another syntax wouldn't really help usability, so with apt install ./foo.deb/experimental you will get the dependencies of foo satisfied by your default release, but if this wouldn't satisfy the version requirements the candidate for this dependency is switched to the version from the experimental release. The same applies for apt build-dep ./foo.dsc/stable-backports which was the initial request.
2018-05-11Extend apt build-dep pkg/release to switch dep as neededDavid Kalnischkies
apt install pkg/release follows versioned dependencies in the candidate switching if the current candidate does not satisfy the dependency, so for uniformity the same should be supported in build-dep.
2018-04-15Introduce experimental new hooks for command-line toolsJulian Andres Klode
This allows third-party package managers like snap or flatpak to hook in and suggest alternatives if packages could not be found, for example. This is still highly experimental and the protocol might change in future versions.
2018-04-13apt-private: Collect not found packages in CacheSetHelperAPTGetJulian Andres Klode
Collecting the packages we could not find allows us to pass them to other places.
2018-02-19restore gcc visibility=hidden for apt-privateDavid Kalnischkies
This setting was lost in the transition to cmake. The private library has no public users and hence the default visibility of symbols changed early to hidden – something which should eventually be done for the public libraries as well, but one step at the time.
2018-01-03allow a method to request auxiliary filesDavid Kalnischkies
If a method needs a file to operate like e.g. mirror needs to get a list of mirrors before it can redirect the the actual requests to them. That could easily be solved by moving the logic into libapt directly, but by allowing a method to request other methods to do something we can keep this logic contained in the method and allow e.g. also methods which perform binary patching or similar things. Previously they would need to implement their own acquire system inside the existing one which in all likelyhood will not support the same features and methods nor operate with similar security compared to what we have already running 'above' the requesting method. That said, to avoid methods producing conflicts with "proper" files we are downloading a new directory is introduced to keep the auxiliary files in. [The message magic number 351 is a tribute to the german Grundgesetz article 35 paragraph 1 which defines that all authorities of the state(s) help each other on request.]
2017-12-13avoid some useless casts reported by -Wuseless-castDavid Kalnischkies
The casts are useless, but the reports show some where we can actually improve the code by replacing them with better alternatives like converting whatever int type into a string instead of casting to a specific one which might in the future be too small. Reported-By: gcc -Wuseless-cast
2017-12-13convert various c-style casts to C++-styleDavid Kalnischkies
gcc was warning about ignored type qualifiers for all of them due to the last 'const', so dropping that and converting to static_cast in the process removes the here harmless warning to avoid hidden real issues in them later on. Reported-By: gcc Gbp-Dch: Ignore
2017-12-13clearing object via constructor instead of memsetDavid Kalnischkies
Reported-By: gcc -Wclass-memaccess Gbp-Dch: Ignore
2017-11-19support COLUMNS environment variable in apt toolsDavid Kalnischkies
apt usually gets the width of the window from the terminal or failing that has a default value, but especially for testing it can be handy to control the size as you can't be sure that variable sized content will always be linebreaked as expected in the testcases.
2017-10-28Also use FindULL for checking if the size tags is validJulian Andres Klode
It used FindI() > 0, but if it is too big, FindI() would cause an error "Cannot convert %s to integer: out of range", so let's also use FindULL() here. Gbp-Dch: ignore
2017-10-28Prevent overflow in Installed-Size (and Size) in apt showJulian Andres Klode
Installed-Size for linux-image-4.13.0-1-amd64-dbg and friends are larger than 4 GB, but read as a signed integer - that's fine so far, as the value is in KB, but it's multiplied with 1024 which overflows. So let's read it as unsigned long long instead. While we're at it, also use unsigned long long for Size, in case that is bigger than 2 GB.
2017-10-05avoid using NULL in varadic function for cmdline parsingDavid Kalnischkies
cppcheck reports: (portability) Passing NULL after the last typed argument to a variadic function leads to undefined behaviour. We don't ship on any platform which has this as undefined behaviour through – or it would be pretty well defined "bad" behaviour which always works, so even through UB is a trigger word, its hardly noteworthy as a change (and as a bonus the scanners of gcc/clang don't consider it UB). The commonly accepted method of fixing that seems to be (const char*)NULL, but it is in fact much simpler to just switch to the varadic functions C++ provides resolving the warning and reducing code. Reported-By: cppcheck Gbp-Dch: Ignore
2017-07-27Always warn if --force-yes is validly specified, not just if usedJulian Andres Klode
The code only used to warn when it came into a situation where something actually had to be forced. Warn directly after parsing the command-line instead, that's more accurate.
2017-07-26suggest using auth.conf for sources with passwordsDavid Kalnischkies
The feature exists for a long while even if we get around to document it properly only now, so we should push for its adoption a bit to avoid the problems its supposed to solve like avoiding usage of non-world readable configuration files as they can cause strange behaviour for the unsuspecting user (like different solutions as root and non-root).
2017-07-26show a warning for Debian shutting down FTP servicesDavid Kalnischkies
We detect the effected sources by matching Release info – that has potential by-catch of repositories which have incorrect field values, but those are better fixed now anyhow. The bigger incorrectness is that this message will not only be printed for the Debian services itself but also for all mirrors not under Debian control but serving Debian like more local/private mirrors which will not (directly) shutdown. It is likely through that many of them will follow suite with less visible announcements or break downright if their upstream source disappears, so having false-positives here seems benefitial for the user in the end.
2017-07-12Reformat and sort all includes with clang-formatJulian Andres Klode
This makes it easier to see which headers includes what. The changes were done by running git grep -l '#\s*include' \ | grep -E '.(cc|h)$' \ | xargs sed -i -E 's/(^\s*)#(\s*)include/\1#\2 include/' To modify all include lines by adding a space, and then running ./git-clang-format.sh.
2017-07-12Drop cacheiterators.h includeJulian Andres Klode
Including cacheiterators.h before pkgcache.h fails because pkgcache.h depends on cacheiterators.h.
2017-06-28ask for releaseinfo change interactively in aptDavid Kalnischkies
If we have a user sitting around we can let 'apt' ask the user for a confirmation rather than print errors at the end and require the user to figure out which commandline flags are needed to confirm the changes non-interactively.
2017-06-28error in update on Release information changesDavid Kalnischkies
The value of Origin, Label, Codename and co can be used in user configuration from apts own pinning to unattended upgrades. A repository changing this values can therefore have serious effects on the behaviour of apt and other tools using these values. In a first step we will generate error messages for these changes now explaining the need for explicit confirmation and provide config options and commandline flags to accept them.
2017-06-28fail instead of warn on insecure repositories in apt-getDavid Kalnischkies
The exception was made to give (script) users a one-release grace period to adapt their setup to deal with apt enforcing signing of repositories. As we are now at the start of a new release cycle its as good a time as any to lift it now. Removes-Exception: 952ee63b0af14a534c0aca00c11d1a99be6b22b2
2017-06-26clean archives without changing directoryDavid Kalnischkies
Adopting this change in other frontends will require source changes as well similar to our own changes in apt-private/.
2017-06-26don't show incorrect 'How odd' errror in no-download modeDavid Kalnischkies
Showing messages related to downloading in a mode which can't download is pretty pointless, so instead of trying harder to make it so that these messages do not trigger just skip them entirely. That the message triggered here is an artifact of the implementation in which the download items are finished, while the code expects them to be still pending – even the in a previous run completely downloaded files. Closes: 863635
2017-03-19Ignore AutomaticRemove conffile option in upgradeDavid Kalnischkies
We are in a dilemma here: The regression of sorts was introduced in 2013 with commit d8a8f9d7f0 allowing pkg modifiers for the upgrade commands. That calls the autoremover as a sideeffect through and with it comes the option to remove the garbage packages in these commands (similar to aptitude). Having the option on the commandline is no problem – people aren't going to request what they don't want (or so I hope), but the documentation explicitly states that this option only effects install/remove and mentions a config knob users might use and expect to not suddenly apply (especially without documentation) to more commands. Just reverting the commit is out of question, completely ignoring the option breaks the workflow of every user who happened to use --autoremove on the commandline for upgrade and expects that to work given that it was accepted and worked in a stable release. Changing the documentation to reflect reality while perhaps the simplest and cleanest option contradicts freeze and is a surprising change we tend to avoid like the plague while just leaving it be confuses all users who end up believing the documentation even if was different in the last 3 years. So what we do is a tricky compromise: The configuration option if read from a file does apply only for install/remove as documented, while if the option is encountered on the commandline it is accepted and applies to the upgrade which should make 99% of the users happy. The rest has to wait for us to figure out for buster how to get that documented and implemented in a saner way. Closes: #855891
2017-01-19fix various typos reported by spellintianDavid Kalnischkies
Most of them in (old) code comments. The two instances of user visible string changes the po files of the manpages are fixed up as well. Gbp-Dch: Ignore Reported-By: spellintian
2017-01-19make the moo reproducibleDavid Kalnischkies
Normal cows moo every time they feel like it and it might be a "moo", "moo!" or "moo?". This is completely unacceptable behaviour in our super cow through as as a superior being it has to show its superiority over the common cows and the meager easter eggs by being fully reproducible! The second version of Chris' patch is modified to include an array of tests for this feature – which doubles as explanation for some of the moo lines by giving more exact dates – and falling back to current time if the environment is invalid + passing time around instead of having an invalid environment be an unrecoverable error (aka: Guru Meditation) as that is more inline with how apt usually behaves: The wisdom of super cow should be available to everyone, even to the most misfortune users not capable of having a valid environment variable. That makes the code slightly more ugly, so instead of requiring a young follower to produce a third version a high priest of the cult applied the finishing touches as he is used to the pain by now – and another round with the slowpoke high priest would have been a serious threat to the Debian release schedule which the cow would not approve. Closes: #848721 Signed-off-by: Super Cow Thanks: Chris Lamb for initial patch and guru meditation
2017-01-19fix 'install --no-download' modeDavid Kalnischkies
The mode wasn't working at all if not used together with --fix-missing which while likely to come in pairs its legal to use standalone. Regression-in: eb1f04dda07c2b69549ad9fd793cca0e91841b3e
2017-01-19don't lock dpkg in update commandsDavid Kalnischkies
The update command acquires a lock on lists/, but at the end it will also require the dpkg/lock while building the binary caches. That seems rather pointless as we are only reading those files, not causing writing in them. This can also cause problems if a package installation is running and a background process (like cron) starts an update: If you are "lucky" enough the update process will pick the dpkg lock in between apt calls causing the installation process to fail.
2017-01-19don't lock dpkg in 'apt-get clean'David Kalnischkies
We get the archives/lock for clean – that is enough to ensure that other apt instances aren't interfering (or are being interfered with). We don't need to block actions involving dpkg.
2017-01-19don't show update stats if cache generation is disabledDavid Kalnischkies
Unlikely that anyone is actually running into this, but if we asked to not generate a cache and avoid it in the first step we shouldn't create one implicitly anyway by displaying the statistics.
2017-01-17CMake: Document that the globs are expanded during CMakeJulian Andres Klode
This will avoid people from thinking that they have to do nothing when they change the set of files. Gbp-Dch: ignore
2016-12-31allow warning generation for non-whitelisted optionsDavid Kalnischkies
The idea is simple: Each¹ Find*( call starts with a call check if the given option (with the requested type) exists in the whitelist. The whitelist is specified via our configure-index file so that we have a better chance at keeping it current. the whitelist is loaded via a special (undocumented for now) configuration stanza and if none is loaded the empty whitelist will make it so that no warnings are shown. Much needs to be done still, but that is as good a time as any to take a snapshot of the current state and release it into the wild given that it found some bugs already and has no practical effect on users. ¹ not all in this iteration, but many
2016-12-31use FindB instead of FindI for Debug::pkgAutoRemoveDavid Kalnischkies
Again no practical difference, but for consistency a boolean option should really be accessed via a boolean method rather than an int especially if you happen to try setting the option to "true" … Gbp-Dch: Ignore
2016-12-31expand -f to --fix-broken in error messagesDavid Kalnischkies
Users end up believing that this is a --force mode as -f is common for that, but apt doesn't have such a mode and --fix-broken is really not about forcing something but actually trying to fix the breakage which tends to be the result of a user forcing something on its system via low-level forced dpkg calls. Example: The "common" pattern of "dpkg -i ./foo.deb; apt install -f" is nowadays far better dealt with via "apt install ./foo.deb". And while at it the two places handing out this suggestion are changed to use the same strings to avoid needless translation work in the future and the suggestion uses 'apt' instead of 'apt-get' as this will be run interactively by a user, so its a good opportunity to showcase what we can do and will allow us to be more helpful to the user. Closes: #709092 Thanks: Kristian Glass for initial patch!
2016-12-31allow default build-essentials to be overriddenDavid Kalnischkies
The config list APT::Build-Essential gets a similar treatment to other lists now by having the value of the option itself be an override for the list allowing to disable build-essentials entirely as well as adding/overriding as usual by now in other lists. Reported-By: Johannes 'josch' Schauer on IRC
2016-12-31add --indep-only for build-dep commandDavid Kalnischkies
The implementation is quite different compared to --arch-only due to ABI reasons but functionality wise they are similar and usually both available for symmetry at least. Closes: #845775
2016-12-16default to --no-check for dpkg-source callDavid Kalnischkies
In bug #757534 the opposite direction was initially requested, but what we did end up with was having a possibility to configure the options passed to dpkg. The reasoning given their and in #724744 is specific why apt doesn't need the checks to be performed by dpkg. In fact, what these two reports show is that if those checks are run people end up being confused about the requirement of them being run, so given the best case those checks can do is do nothing (visibly) while the worst cases are warnings and errors which are neither we are from a security point better of with disabling them – as (as mentioned in the bugreports) false positives for issues are really really bad in a security context. Closes: 724744
2016-12-16remove needless fork() in apt-get sourceDavid Kalnischkies
We are calling system() in this code paths, so all we do here is having a single child performing the action while the parent waits for it to finish… with the added strangeness of not having our usual error message collection and giving up after first failure even if told to act on multiple packages.
2016-12-16let {dsc,tar,diff}-only implicitly enable download-onlyDavid Kalnischkies
That was the case already for tar-only and diff-only, but in a more confusing way and without a message while dsc "worked" before resulting in a dpkg-source error shortly after as tar/diff files aren't available…
2016-11-09add support for Build-Depends/Conflicts-ArchJohannes Schauer
These new enum values might cause "interesting" behaviour in tools not expecting them – like an old apt would think a Build-Conflicts-Arch is some sort of Build-Depends – but that can't reasonably be avoided and effects only packages using B-D/C-A so if there is any breakage the tools can easily be adapted. The APT_PKG_RELEASE number is increased so that libapt users can detect the availability of these new enum fields via: #if APT_PKG_ABI > 500 || (APT_PKG_ABI == 500 && APT_PKG_RELEASE >= 1) Closes: #837395
2016-11-02don't install new deps of candidates for kept back pkgsDavid Kalnischkies
In effect this is an extension of the 6 years old commit a8dfff90aa740889eb99d00fde5d70908d9fd88a which uses the autoremover to remove packages again from the solution which are no longer needed to be there. Commonly these are dependencies of packages we end up not installed due to problem resolver decisions. Slightly less common is the situation we deal with here: a package which we wanted to upgrade sporting a new dependency, but ended up holding back. The problem is that all versions of an installed reverse dependencies can bring back a "garbage" package – we need to do this as there is nothing inherently wrong in having garbage packages installed or upgrade them, which itself would have garbage dependencies, so just blindly killing all new garbage packages would prevent the upgrade (and actually generate errors). What we should be doing is looking only at the version we will have on the system, disregarding all old/new reverse dependencies. Reported-By: Stuart Prescott (themill) on IRC
2016-09-07edsp: try 2 to read responses even if writing failedDavid Kalnischkies
Commit b60c8a89c281f2bb945d426d2215cbf8f5760738 improved the situation, but due to inconsistency mostly for planners, not for solvers. As the idea of hiding errors if we show another error is a bit scary (as the extern error might be a followup of our intern error, rather than the reason for our intern error as it is at the moment) we don't discard the errors, but if we got an extern error we show them directly removing them from the error list at the end of the run – that list will contain the extern error which hopefully gives us the best of both worlds. The problem itself is the same as before: The externals exiting before apt is done talking to them. Reported-By: Johannes 'josch' Schauer on IRC
2016-08-27Merge branch 'portability/freebsd'Julian Andres Klode
2016-08-26Accept --autoremove as alias for --auto-removeJulian Andres Klode
I probably missed that when I did the usability work. But better late than never.
2016-08-26CMake/private-download: Fix statfs includes on FreeBSDJulian Andres Klode
On FreeBSD, we have to include sys/params.h and sys/mount.h, not sys/vfs.h. Gbp-Dch: ignore
2016-08-26Add missing includes and external definitionsJulian Andres Klode
Several modules use std::array without including the array header. Bad modules. Some modules use STDOUT_FILENO and friends, or close() without including unistd.h, where they are defined. One module also uses WIFEXITED() without including sys/wait.h. Finally, environ is not specified to be defined in unistd.h. We are required to define it ourselves according to POSIX, so let's do that.