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2015-12-27FileFdPrivate: Extract SimpleBuffer and mark it as hiddenJulian Andres Klode
Gbp-Dch: ignore
2015-12-27ParseDepends: Mark branches for build-dep parsing as unlikelyJulian Andres Klode
We do not see those branches at all during normal mode of operation (that is, during cache generation), so tell the compiler about it.
2015-12-27debListParser: Do not validate Description-md5 for correctness twiceJulian Andres Klode
The Set() method returns false if the input is no hex number, so simply use that.
2015-12-27Hex2Digit: Do not use isxdigit()Niels Thykier
We directly check if we are a hex digit in HexDigit, so use that information. [jak@debian.org: Commit message wording]
2015-12-27debListParser: ParseDepends: Only query native arch if neededJulian Andres Klode
This makes the code parsing architecture lists slower, but on the other hand, improves the more generic case of reading dependencies from Packages files.
2015-12-27pkgcachegen: Use std::unordered_map instead of std::mapJulian Andres Klode
std::unordered_map is faster than std::map in our use case, reducing cache generation time by about 10% in my benchmark.
2015-12-27Convert most callers of isspace() to isspace_ascii()Julian Andres Klode
This converts all callers that read machine-generated data, callers that might work with user input are not converted.
2015-12-27Introduce isspace_ascii() for use by parsersJulian Andres Klode
This is like isspace(), but ignores the current locale.
2015-12-26Refactor InternalReadLine to not unroll Size == 0 caseJulian Andres Klode
There is not much point and this is more readable. Gbp-Dch: ignore
2015-12-26Change InternalReadLine to always use buffer.read() return valueJulian Andres Klode
This is mostly a documentation issue, as the size we want to read is always less than or equal to the size of the buffer, so the return value will be the same as the size argument. Nonetheless, people wondered about it, and it seems clearer to just always use the return value.
2015-12-26Get rid of memmove() in our read bufferingJulian Andres Klode
This further improves our performance, and rred on uncompressed files now spents 78% of its time in writing. Which means that we should really look at buffering those.
2015-12-26Use a hardcoded buffer size of 4096 to fix performanceJulian Andres Klode
The code uses memmove() to move parts of the buffer to the front when the buffer is only partially read. By simply reading one page at a time, the maximum size of bytes that must be moved has a hard limit, and performance improves: In one test case, consisting of a 430 MB Contents file, and a 75K PDiff, applying the PDiff previously took about 48 seconds and now completes in 2 seconds. Further speed up can be achieved by buffering writes, they account for about 60% of the run-time now.
2015-12-24Mark all FileFdPrivate classes as hidden1.1.6Julian Andres Klode
Gbp-Dch: ignore
2015-12-23fix new[] vs delete mismatch introduced by b3db9d81David Kalnischkies
And as we are at it lets fix the 'style' issue I introduced with the filefd changes as well. Reported-By: gcc -fsanitize's & cppcheck Git-Dch: Ignore
2015-12-23use a dynamic buffer for ReadLineDavid Kalnischkies
We don't need the buffer that often - only for ReadLine - as it is only occasionally used, so it is actually more efficient to allocate it if needed instead of statically by default. It also allows the caller to influence the buffer size instead of hardcoding it. Git-Dch: Ignore
2015-12-23implement a buffer system for FileFd::ReadLineDavid Kalnischkies
The default implementation of ReadLine was very naive by just reading each character one-by-one. That is kinda okay for libraries implementing compression as they have internal buffers (but still not great), but while working with files directly or via a pipe as there is no buffer there so all those reads are in fact system calls. This commit introduces an internal buffer in the FileFd implementation which is only used by ReadLine. The more low-level Read and all other actions remain unbuffered – they just changed to deal with potential "left-overs" in the buffer correctly. Closes: 808579
2015-12-22parse xz-compression level from configurationDavid Kalnischkies
If we use the library to compress xz, still try to understand and pick up the arguments we would have used to call xz to figure out which level the user wants us to use instead of defaulting to level 6 (which is the default level of xz).
2015-12-22follow dpkg and xz and use CRC64 for xz compressionDavid Kalnischkies
dpkg switched from CRC32 to CRC64 in 777915108d9d36d022dc4fc4151a615fc95e5032 with the message: | This is the default CRC used by the xz command-line tool, align with | it and switch from CRC32 to CRC64. It should provide slightly better | detection against damaged data, at a negligible speed difference.
2015-12-22shuffle compressor-specific code into private subclassesDavid Kalnischkies
This isn't implementing any new features, it is "just" moving code around from FileFd methods which decided on each call how to handle the request by including all logic for all possible compressor backends in the method body to a model in which backend-specifics are implemented in a FileFdPrivate subclass. This avoids a big chunk of #ifdef's and should make it a tiny bit more obvious which backend uses which code. The execution of the idea is slightly uglified by the need to preserve ABI and API which causes liberal befriending. Git-Dch: Ignore
2015-12-19Do not try to read in FileFd::Read() if Size is 0Julian Andres Klode
There's no point trying to read 0 bytes, so let's just not do this and switch to a while loop like in Write(). Gbp-Dch: ignore
2015-12-19Do nothing in FileFd::Write() if Size is 0Julian Andres Klode
Turn the do-while loop into while loops, so it simply does nothing if the Size is already 0. This reverts commit c0b271edc2f6d9e5dea5ac82fbc911f0e3adfa7a which introduced a fix for a specific instance of the issue in the CopyFile() function. Closes: #808381
2015-12-19CopyFile: avoid failing on EOF on some systemsPino Toscano
On EOF, ToRead will be 0, which might trigger on some systems (e.g. on the Hurd) an error due to the invalid byte count passed to write(). The whole loop already checks for ToRead != 0, so perform the writing step only when there was actual data read. Closes: #808381
2015-12-19CopyFile: fix BufSize to a sane valuePino Toscano
Commit e977b8b9234ac5db32f2f0ad7e183139b988340d tries to make BufSize calculated based on the size of the buffer; the problem is that std::unique_ptr::size() returns a pointer to the data, so sizeof() equals to the size of a pointer (later divided by sizeof(char), which is 1). The result is that the CopyFile copies in chunks of 8 bytes, which is not exactly ideal... As solution, declare BufSize in advance, and use its value to allocate the Buf array. Closes: #808381
2015-12-14pkgcache: Make hash arch-independent using fixed size integerJulian Andres Klode
This helps writing test cases. Also adapt the test case that expected 64-bit. Nothing changes performance wise, the distribution of the hash values remains intact.
2015-12-14tagfile: Hardcode error message for out of range integer valuesJulian Andres Klode
This makes the test suite work on 32 bit-long platforms. Gbp-Dch: ignore
2015-12-14non-existing directories don't need to be cleanedDavid Kalnischkies
Trying to clean up directories which do not exist seems rather silly if you think about it, so let apt think about it and stop it. Depends a bit on the caller if this is fixing anything for them as they might try to acquire a lock or doing other clever things as apt does. Closes: 807477
2015-12-14support regex and co in 'apt-cache policy $pkg' againDavid Kalnischkies
Regression of 1e064088bf7b3e29cd36d30760fb3e4143a1a49a (1.1~exp4) which moved code around and renamed methods heavily ending up calling the wrong method matching packagenames only instead of calling the full array. Most commands work with versions, so this managed to fly under the radar for quite a while. Closes: 807870
2015-12-14show a more descriptive error for weak Release filesDavid Kalnischkies
If we can't work with the hashes we parsed from the Release file we display now an error message if the Release file includes only weak hashes instead of downloading the indexes and failing to verify them with "Hash Sum mismatch" even through the hashes didn't mismatch (they were just weak). If for some (unlikely) reason we have got weak hashes only for individual targets we will show a warning to this effect (again, befor downloading and failing the index itself). Closes: 806459
2015-12-13parse .diff/Index hashes in reverse orderDavid Kalnischkies
Reversing the parsing order ensures that we parse weaker hashes (like SHA1) before we touch newer/stronger hashes (like SHA256) as the weaker ones will usually be there for a longer time already with data already present, which we would discard if we start with the strong one first. The discarding is visible in the debug logs: File X wasn't in the list for the first parsed hash! (history) File X wasn't in the list for the first parsed hash! (patches) which if file X is part of the patch-path means apt will not find a path and fallback to acquire the whole file instead needlessly. If file X isn't part of the patch-path that is no problem, so that effects only the update-call which updates with patches coming from before and after the addition of a new hash.
2015-12-13fix typos and docs in GlobalError documentationDavid Kalnischkies
Reported-By: Manuel A. Fernandez Montecelo <mafm@debian.org> Git-Dch: Ignore
2015-12-11mmap: Define _DEFAULT_SOURCE instead of _BSD_SOURCEJulian Andres Klode
Fixes a warning reported by gcc. Gbp-Dch: ignore
2015-12-11Bump cache minor version to 2 to trigger rebuildsJulian Andres Klode
With the package names now normalized to lower case, the caches of affected systems need to be rebuild. Adjust the minor version to trigger such a rebuild. Gbp-Dch: ignore
2015-12-11Convert package names from Packages files to lower caseJulian Andres Klode
dpkg does that when reading package files, so we should do the same. This only deals with parsing names from binary package paragraphs, it does not look at source package names and/or the list of binaries in a dsc file. Closes: #807012
2015-12-10Do not swap required and important in pkgCache::Priority()Julian Andres Klode
required and important were swapped, leading to wrong output. Closes: #807523 Thanks: Manuel A. Fernandez Montecelo for discovering this
2015-12-07Use 0llu instead of 0ull in one place tooJulian Andres Klode
Gbp-Dch: ignore
2015-12-07Avoid overflow when summing up file sizesJulian Andres Klode
We need to pass 0llu instead of 0 as the init value, otherwise std::accumulate will calculate with ints. Reported-by: Raphaël Hertzog
2015-12-02use @CHANGEPATH@ as placeholder in changelog URI templatesDavid Kalnischkies
This should make it more obvious that CHANGEPATH is a placeholder which apt will replace with a package specific path rather than a string constant. Mail-Reference: <87d1upgvaf.fsf@deep-thought.43-1.org> Mail-Archive: https://lists.debian.org/debian-dak/2015/12/msg00005.html
2015-12-01require explicit paths to dsc/control as we do for deb filesDavid Kalnischkies
Otherwise a user is subject to unexpected content-injection depending on which directory she happens to start apt in. This also cleans up the code requiring less implementation details in build-dep which is always good. Technically, this is an ABI break as we override virtual methods, but that they weren't overridden was a mistake resulting in pure classes, which shouldn't be pure, so they were unusable – and as they are new in 1.1 nobody is using them yet (and hopefully ever as they are borderline implementation details). Closes: 806693
2015-11-29accept ../ on the cmdline as start for a deb file as wellDavid Kalnischkies
Regression of 14341a7ee1ca3dbcdcdbe10ad19b947ce23d972d. Reported-By: Julian Andres Klode <jak@debian.org>
2015-11-29tests: fix typos, correct helpmsgs and test testsDavid Kalnischkies
Git-Dch: Ignore
2015-11-29doc: VerifyFile checks all hashes instead of best onlyDavid Kalnischkies
The implementation changed in 495b7a615a2d8f485beadf88c6ed298f5bbe50c2 Git-Dch: Ignore Reported-By: Julian Andres Klode <jak@debian.org>
2015-11-28Revert "Revert "appease adequate with some weak symbols for -private""Julian Andres Klode
This reverts commit 7ac9386cb6e272625490fcf3e8183b45e28bbc43.
2015-11-28Revert "appease adequate with some weak symbols for -private"Julian Andres Klode
This reverts commit 28f24d3dad1844af316337d565ba2ebc11c8ce97. This fails on Ubuntu as they build with -Bsymbolic-functions.
2015-11-28disable privilege-drop verification by default as fakeroot trips over itDavid Kalnischkies
Dropping privileges is an involved process for code and system alike so ideally we want to verify that all the work wasn't in vain. Stuff designed to sidestep the usual privilege checks like fakeroot (and its many alternatives) have their problem with this through, partly through missing wrapping (#806521), partly as e.g. regaining root from an unprivileged user is in their design. This commit therefore disables most of these checks by default so that apt runs fine again in a fakeroot environment. Closes: 806475
2015-11-28show the group we failed to drop via setgroupsDavid Kalnischkies
This also deals with the unlikely case of groups being mentioned multiple times or if the effective group isn't mentioned at all. In practice, it is a debugging aid through like for #806475. Git-Dch: Ignore
2015-11-27ignore deprecated method calls in deprecated methodDavid Kalnischkies
Git-Dch: Ignore
2015-11-27outsmart gcc -O3 over-optimization in pkgCdrom::FindPackagesDavid Kalnischkies
Seems like a simpler workaround than forcing a lower optimization level just for this for all of apt. See also: https://bugs.launchpad.net/ubuntu/+source/gcc-5/+bug/1473674
2015-11-27add messages to our deprecation warnings in libaptDavid Kalnischkies
Git-Dch: Ignore
2015-11-27appease adequate with some weak symbols for -privateDavid Kalnischkies
Closes: #806422
2015-11-27Check if the Apt::Sandbox::User exists in CheckDropPrivsMustBeDisabled()Michael Vogt
If it does not exist disabled priv dropping as there is nothing we can drop to. This will unblock people with special chroots or systems that deleted the "_apt" user. Closes: #806406