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-1 is not an allowed value for the file descriptor, the only
allowed non-file-descriptor value is AT_FDCWD. So use that
instead.
AT_SYMLINK_NOFOLLOW has a weird semantic: It checks whether
we have the specified access on the symbolic link. It also
is implemented only by glibc on Linux, so it's inherently
non-portable. We should just drop it.
Thanks: James Clarke for debugging these issues
Reported-by: James Clarke <jrtc27@jrtc27.com>
(cherry picked from commit 25f54c960d7a4ceca7bd3e21f87baf48d6cbc2d3)
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In the case of build-dep and other commands where a file can be
passed we must make sure not to normalize the path name as that
can have odd side effects, or well, cause the operation to do
nothing.
Test for build-dep-file is adjusted to perform the vcard check
once as "vcard" and once as "VCard", thus testing that this
solves the reported bug.
We inline the std::transform() and optimize it a bit to not
write anything in the common case (package names are defined
to be lowercase, the whole transformation is just for names
that should not exist...) to counter the performance hit of
the added find() call (it's about 0.15% more instructions
than with the existing transform, but we save about 0.67%
in writes...).
Closes: #854794
(cherry picked from commit 85ee4036c68d8ecd2c973d413a17aca81380900b)
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Since the introduction of by-hash, two differently named
files might have the same real URL. In our case, the files
icons-64x64.tar.gz and icons-128x128.tar.gz of empty tarballs.
APT would try to merge them and end with weird errors because
it completed the first download and enters the second stage for
decompressing and verifying. After that it would queue a new item
to copy the original file to the location, but that copy item would
be in the wrong stage, causing it to use the hashes for the
decompressed item.
Closes: #838441
(cherry picked from commit 7b78e8bef1fc9de22d826db1db9df25f97d3710c)
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If apt renames a file to .FAILED it leaves its namespace and is never
touched again – expect since 1.1~exp4 in which "apt clean" will remove
those files. The usefulness of these files rapidly degrades if you don't
keep the update log itself (together with debug output in the best case)
through and on 99% of all system they will be kept around forever just
to collect dust over time and eat up space.
With this commit an update call will remove all FAILED files of previous
runs, so that the FAILED files you have on disk are always only the ones
related to the last apt run stopping apt from hoarding files.
Closes: 846476
(cherry picked from commit 7ca83492e802967f183babf06ab541b1b51f1703)
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Keeping the Fd of the cache file we have validated around to later load
it into the mmap ensures not only that we load the same file (which
wouldn't really be a problem in practice), but that this file also still
exists and wasn't deleted e.g. by a 'apt clean' call run in parallel.
(cherry picked from commit 06606f073210fe3902fe92d5ff77fa1ab621b972)
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Interpreting a boolean as an int works just fine – it just hasn't the
intended result – it isn't a serious problem through as the disabling of
the usage of this dpkg calling style is just an "optimization"
(cherry picked from commit 4e18c2cee6da39982cc463cafbf27eab5561099f)
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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
(cherry picked from commit c15ba854b6736696f164e4d2c243a944e2d4006e)
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This can happen e.g. for file: repositories. There is no inherent
problem with setting such values internally, but its bad style,
forbidden in the manpage and could be annoying in the future.
Gbp-Dch: Ignore
(cherry picked from commit 44ecb8c3579e5ae8828f83530e4151a0ff84d5d6)
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The crude way of preparing a message to be a multiline value failed at
generation valid deb822 in case the error message ended with a new line
like the resolving errors from apt do. apt itself can parse these, but
other tools like grep-dctrl choke on it, so be nice and print valid.
Reported-By: Johannes 'josch' Schauer on IRC
(cherry picked from commit 0161280405fe5aa256dc9df6a56106dd3a1a6f38)
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In ad9416611ab83f7799f2dcb4bf7f3ef30e9fe6f8 we fall back to asking the
original mirror (e.g. a redirector) if we do not get the expected
result. This works for the indexes, but patches are a different beast
and much simpler. Adding this fallback code here seems like overkill as
they are usually right along their Index file, so actually forward the
relevant settings to the patch items which fixes pdiff support combined
with a redirector and partial mirrors as in such a situation the pdiff
patches would be 404 and the complete index would be downloaded.
(cherry picked from commit 5832913a49d4f7c75527264a935cc0ce00627f1d)
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(cherry picked from commit 8e7a99564dd57b0dcb7df47b43e71ccefc8e0ebe)
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We try to configure all packages at the end which need to be configured,
but that also applies to packages which weren't completely installed
(e.g. maintainerscript failed) we end up removing in this interaction
instead.
APT doesn't perform this explicit configure in the end as it is using
"dpkg --configure --pending", but it does confuse the progress report
and potentially also hook scripts.
Regression-Of: 9ffbac99e52c91182ed8ff8678a994626b194e69
(cherry picked from commit bb9c5972524ac5c078fa0f0bc5674c7a0fe01fb4)
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dpkg stumbles over these (#844300) and we haven't dropped 'easier'
removes to be implicit and to be scheduled by dpkg by default so far
so we shouldn't push the decision in such cases to dpkg either.
(cherry picked from commit 53f3fc59f4eb37eea57bbde53fb75f2e15af0378)
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Our old idea was to look for the first package which would be "touched"
and take this as the package dpkg is talking about, but that is
incorrect in complicated situations like a package upgraded to/from
multiple M-A:same siblings installed.
As we us the progress report to decide what is still needed we have to
be reasonabily right about the package dpkg is talking about, so we jump
to quite a few loops to get it.
(cherry picked from commit 4b10240cca0dc0a4e82e42959545d2ae7e622d29)
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Given that we use the progress information to skip over actions dpkg has
already done like not purging a package which was already removed and
had no config files or not acting on disappeared packages and such it is
important that apt and dpkg agree on which states the package has to
pass through.
To ensure that we keep tabs on this in the future a warning is added at
the end if apt hasn't seen all the action it was supposed to see. I
can't wait for the first bugreporters to wonder about this…
(cherry picked from commit dabe9e2482180ada77d2adda2b3c03db22059fb8)
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If a package is triggered dpkg frequently issues two messages about it
causing us to make a note about it both times which messes up our
planned dpkg actions view. Adding these actions if we have nothing else
planned fixes this and should still be correct as those planned actions
will deal with the triggering just fine and we avoid strange problems
like a package triggered before its removed…
(cherry picked from commit 066d4a5bab628ef8220971bb5763ff8f3a13de07)
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apt tools do not really support these other variables, but tools apt
calls might, so lets play save and clean those up as needed.
Reported-By: Paul Wise (pabs) on IRC
(cherry picked from commit e2c8c825a5470e33c25d00e07de188d0e03922c8)
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We can't cleanup the environment like e.g. sudo would do as you usually
want the environment to "leak" into these helpers, but some variables
like HOME should really not have still the value of the root user – it
could confuse the helpers (USER) and HOME isn't accessible anyhow.
Closes: 842877
(cherry picked from commit 34b491e735ad47c4805e63f3b83a659b8d10262b)
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A user relying on the deprecated behaviour of apt-get to accept a source
with an unknown pubkey to install a package containing the key expects
that the following 'apt-get update' causes the source to be considered
as trusted, but in case the source hadn't changed in the meantime this
wasn't happening: The source kept being untrusted until the Release file
was changed.
This only effects sources not using InRelease and only apt-get, the apt
binary downright refuses this course of actions, but it is a common way
of adding external sources.
Closes: 838779
(cherry picked from commit 84eec207be35b8c117c430296d4c212b079c00c1)
LP: #1657440
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This is a follow up to the previous issue where we did not check
if getline() returned -1 due to an end of file or due to an error
like memory allocation, treating both as end of file.
Here we ensure that we also handle buffered writes correctly by
flushing the files before checking for any errors in our error
stack.
Buffered writes themselves were introduced in 1.1.9, but the
function was never called with a buffered file from inside
apt until commit 46c4043d741cb2c1d54e7f5bfaa234f1b7580f6c
which was first released with apt 1.2.10. The function is
public, though, so fixing this is a good idea anyway.
Affected: >= 1.1.9
(cherry picked from commit 6212ee84a517ed68217429022bd45c108ecf9f85)
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This fixes a security issue where signatures of the
InRelease files could be circumvented in a man-in-the-middle
attack, giving attackers the ability to serve any packages
they want to a system, in turn giving them root access.
It turns out that getline() may not only return EINVAL
as stated in the documentation - it might also return
in case of an error when allocating memory.
This fix not only adds a check that reading worked
correctly, it also implicitly checks that all writes
worked by reporting any other error that occurred inside
the loop and was logged by apt.
Affected: >= 0.9.8
Reported-By: Jann Horn <jannh@google.com>
Thanks: Jann Horn, Google Project Zero for reporting the issue
LP: #1647467
(cherry picked from commit 51be550c5c38a2e1ddfc2af50a9fab73ccf78026)
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This fixes a regression introduced in
commit 8f858d560e3b7b475c623c4e242d1edce246025a
don't leak FD in AutoProxyDetect command return parsing
which accidentally made the proxy autodetection code also read
the scripts output on stderr, not only on stdout when it switched
the code from popen() to Popen().
Reported-By: Tim Small <tim@seoss.co.uk>
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If the dependency line does not contain spaces in the repository
but does in the dpkg status file (because dpkg normalized the
dependency list), the dpkg line might be longer than the line
in the repository. If it now happens to be longer than 1024
characters, it would be skipped, causing the hashes to be
out of date.
Note that we have to bump the minor cache version again as
this changes the format slightly, and we might get mismatches
with an older src cache otherwise.
Fixes Debian/apt#23
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We need to ignore messages from gcov. All those messages
start with profiling: and are printed using vfprintf(), so
the only thing we can do is add a library overriding those
functions and linking apt-pkg to it.
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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
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Employ a priority queue instead of a normal queue to hold
the items; and only add items to the running pipeline if
their priority is the same or higher than the priority
of items in the queue.
The priorities are designed for a 3 stage pipeline system:
In stage 1, all Release files and .diff/Index files are fetched. This
allows us to determine what files remain to be fetched, and thus
ensures a usable progress reporting.
In stage 2, all Pdiff patches are fetched, so we can apply them
in parallel with fetching other files in stage 3.
In stage 3, all other files are fetched (complete index files
such as Contents, Packages).
Performance improvements, mainly from fetching the pdiff patches
before complete files, so they can be applied in parallel:
For the 01 Sep 2016 03:35:23 UTC -> 02 Sep 2016 09:25:37 update
of Debian unstable and testing with Contents and appstream for
amd64 and i386, update time reduced from 37 seconds to 24-28
seconds.
Previously, apt would first download new DEP11 icon tarballs
and metadata files, causing the CPU to be idle. By fetching
the diffs in stage 2, we can now patch our contents and Packages
files while we are downloading the DEP11 stuff.
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This accidentally used ICONV_DIRECTORIES, which does not
even exist. Weird.
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memcpy is marked as nonnull for its input, but ignores the input anyhow
if the declared length is zero. Our SHA2 implementations do this as
well, it was "just" MD5 and SHA1 missing, so we add the length check
here as well as along the callstack as it is really pointless to do all
these method calls for "nothing".
Reported-By: gcc -fsanitize=undefined
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If the inner Base256ToNum() returned false, it did not set
Num to a new value, causing it to be uninitialized, and thus
might have caused the function to exit despite a good result.
Also document why the Res = Num, if (Res != Num) magic is done.
Reported-By: valgrind
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Adding 1 to the value of d->End - current makes restLength one byte
too long: If we pass memchr(current, ..., restLength) has thus
undefined behavior.
Also, reading the value of current has undefined behavior if
current >= d->End, not only for current > d->End:
Consider a string of length 1, that is d->End = d->Current + 1.
We can only read at d->Current + 0, but d->Current + 1 is beyond
the end of the string.
This probably caused several inexplicable build failures on hurd-i386
in the past, and just now caused a build failure on Ubuntu's amd64
builder.
Reported-By: valgrind
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If a Binary field contains one or more spaces before a comma, the
code produced a segmentation fault, as it accidentally set a pointer
to 0 instead of the value of the pointer.
If the comma is at the beginning of the field, the code would
create a binStartNext that points one element before the start
of the string, which is undefined behavior.
We also need to check that we do not exit the string during the
replacement of spaces before commas: A string of the form " ,"
would normally exit the boundary of the Buffer:
binStartNext = offset 1 ','
binEnd = offset 0 ' '
isspace_ascii(*binEnd) = true => --binEnd
=> binEnd = - 1
We get rid of the problem by only allowing spaces to be eliminated
if they are not the first character of the buffer:
binStartNext = offset 1 ','
binEnd = offset 0 ' '
binEnd > buffer = false, isspace_ascii(*binEnd) = true
=> exit loop
=> binEnd remains 0
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Apparently we had no default defined for this.
Reported-By: David Kalnischkies
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This accidentally had two apt in it. This fixes a regression
from commit 8757a0f.
Gbp-Dch: ignore
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An absolute filename for a *.deb file starts with a /. A package with
the name of the file is inserted in the cache which is provided by the
"real" package for internal reasons. The pinning code detects a regex
based wildcard by having the regex start with /. That is no problem
as a / can not be included in a package name… expect that our virtual
filename package can and does.
We fix this two ways actually: First, a regex is only being considered a
regex if it also ends with / (we don't support flags). That stops our
problem with the virtual filename packages already, but to be sure we
also do not enter the loop if matcher and package name are equal.
It has to be noted that the creation of pins for virtual packages like
the here effected filename packages is pointless as only versions can be
pinned, but checking that a package is really purely virtual is too
costly compared to just creating an unused pin.
Closes: 835818
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Without randomizing the order in which we download the index files we
leak needlessly information to the mirrors of which architecture is
native or foreign on this system. More importantly, we leak the order in
which description translations will be used which in most cases will e.g.
have the native tongue first.
Note that the leak effect in practice is limited as apt detects if a file
it wants to download is already available in the latest version from a
previous download and does not query the server in such cases. Combined
with the fact that Translation files are usually updated infrequently
and not all at the same time, so a mirror can never be sure if it got asked
about all files the user wants.
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FreeBSD has two iconv systems: It ships an iconv.h itself,
and symbols for that in the libc. But there's also the port
of GNU libiconv, which unfortunately for us, Doxygen depends
on.
This changes things to prefer a separate libiconv library
over the system one; that is, the port on FreeBSD.
Gbp-Dch: ignore
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This is needed on BSD where root's default group is wheel, not
root.
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This fixes issues with chroots, but the goal here was to get
the test suite working on systems without dpkg.
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This allows other vendors to use different paths, or to build
your own APT in /opt for testing. Note that this uses + 1 in
some places, as the paths we receive are absolute, but we need
to strip of the initial /.
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The C.UTF-8 locale is not portable, so we need to use C, otherwise
we crash on other systems. We can use std::locale::classic() for
that, which might also be a bit cheaper than using locale("C").
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Gbp-Dch: ignore
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Does not exist on FreeBSD
Gbp-Dch: ignore
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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.
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Ubuntu uses *.ddeb files for their debug packages, but the interface we
are using since f495992428a396e0f98886c9a761a804aa161c68 to talk to dpkg
isn't supporting *.ddeb files. This used to work previously as apt itself
isn't caring about the filenames at all and if they are explicitly
mentioned dpkg will accept all, too.
It might or might not be a good idea to patch dpkg, too, but regardless
of it happening, we don't want to couple us to closely to dpkg for this
minor feature but testing for this at runtime as it would delay shipping
the fix for the too long commandlines further.
It is also questionable if it is really a good idea to allow any file
extension to be used here (like .foobar in the testcase), but we used to
and we tend to avoid breaking existing usecases if we can help it.
As a bonus, this also allows the installation of ddeb files directly
from the commandline as you can with deb files already. We continue to
ignore udeb through as the user-mistake to useful ratio is too high.
LP: #1616909
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In most cases apt was already skipping the (re)setting of packages as
to be removed/purged if dpkg had told us that it already did, but we
haven't dealt with it in the most obvious of the cases: Selections set
for packages we touched in this operation which either restores
selections even dpkg would have overridden or e.g. tries to restore a
purge selection for a package which was just purged – does not happen
with apt itself as it isn't using selections in this way, but higher
frontends like aptitude do.
The result in the later case is a warning printed by dpkg that we try to
set selections for an unknown package, which is harmless per se, but can
be confusing for users and we really shouldn't cause warnings in dpkg if
we can help it.
Reported-By: Guillem Jover on IRC
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Improve-Upon: 2e2865ae53a65c00dd55a892d5b48458f3110366
Reported-By: Julian Andres Klode
Gbp-Dch: Ignore
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The bugreport shows a segfault caused by the code not doing the correct
magical dance to remove an item from inside a queue in all cases. We
could try hard to fix this, but it is actually better and also easier to
perform these checks (which cause instant failure) earlier so that they
haven't entered queue(s) yet, which in return makes cleanup trivial.
The result is that we actually end up failing "too early" as if we
wouldn't be careful download errors would be logged before that process
was even started. Not a problem for the acquire system, but likely to
confuse users and programs alike if they see the download process
producing errors before apt was technically allowed to do an acquire
(it didn't, so no violation, but it looks like it to the untrained eye).
Closes: 835195
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We basically called ourselves before, creating an endless loop.
Reported-By: clang
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This time it is the formatting of floating numbers in progress
reporting with a radix charater potentially not being dot.
Followup of 7303e11ff28f920a6277c159aa46f80c007350bb. Regression of
b58e2c7c56b1416a343e81f9f80cb1f02c128e25 in so far as it exchanging
very effected with slightly less effected code.
LP: 1611010
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