Bug#782608: apt: config files sometimes being ignored

To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: Bug#782608: apt: config files sometimes being ignored
From: Phil Carmody <pc+debian@fatphil.org>
Date: Tue, 14 Apr 2015 22:13:14 +0300
Message-id: <[🔎] 20150414191314.9306.54240.reportbug@bispaz.fatphil.org>
Reply-to: Phil Carmody <pc+debian@fatphil.org>, 782608@bugs.debian.org

Package: apt
Version: 0.9.7.9+deb7u7
Severity: normal

Dear Maintainer,

A local config file was not being read by any of the apt tools. 

  phil@bispaz:bin$ apt-config dump | grep Install-R
  APT::Install-Recommends "1";

When I renamed it:

  phil@bispaz:bin$ sudo mv /etc/apt/apt.conf.d/99bispaz.local /etc/apt/apt.conf.d/99bispaz_local

it was then read correctly:

  phil@bispaz:bin$ apt-config dump | grep Install-R
  APT::Install-Recommends "0";

The old name was not in the Dir::Ignore-Files-Silently list

As there can be security-related, and directory-path-related settings
in such files, there could be some quite nasty repercussions if
intended settings were indeed not set.

strace shows no attempt is made to open the file when it has the
bug-inducing name:

  phil@bispaz:bin$ strace -e open,getdents apt-config dump 2>&1 >/dev/null
  open("/etc/apt/apt.conf.d/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
  getdents(3, /* 7 entries */, 32768)     = 224
  open("/usr/share/locale/locale.alias", O_RDONLY) = 4
  open("/usr/share/locale/en_GB/LC_MESSAGES/libapt-pkg4.12.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  open("/usr/share/locale/en/LC_MESSAGES/libapt-pkg4.12.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
  getdents(3, /* 0 entries */, 32768)     = 0
  open("/etc/apt/apt.conf.d/00trustcdrom", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/01autoremove", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/20listchanges", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/70debconf", O_RDONLY) = 3

Compared to when it has the working name:

  phil@bispaz:bin$ strace -e open,getdents apt-config dump 2>&1 >/dev/null       
  open("/etc/apt/apt.conf.d/", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
  getdents(3, /* 7 entries */, 32768)     = 224
  getdents(3, /* 0 entries */, 32768)     = 0
  open("/etc/apt/apt.conf.d/00trustcdrom", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/01autoremove", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/20listchanges", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/70debconf", O_RDONLY) = 3
  open("/etc/apt/apt.conf.d/99bispaz_local", O_RDONLY) = 3

The additional open()s might imply that it's interpreting the ".local"
name as having some special meaning, but nowhere is that behaviour
documented.

-- Package-specific info:

-- apt-config dump --

APT "";
APT::Architecture "amd64";
APT::Build-Essential "";
APT::Build-Essential:: "build-essential";
APT::Install-Recommends "0";
APT::Install-Suggests "0";
APT::Authentication "";
APT::Authentication::TrustCDROM "true";
APT::NeverAutoRemove "";
APT::NeverAutoRemove:: "^firmware-linux.*";
APT::NeverAutoRemove:: "^linux-firmware$";
APT::NeverAutoRemove:: "^linux-image.*";
APT::NeverAutoRemove:: "^kfreebsd-image.*";
APT::NeverAutoRemove:: "^linux-restricted-modules.*";
APT::NeverAutoRemove:: "^linux-ubuntu-modules-.*";
APT::NeverAutoRemove:: "^gnumach$";
APT::NeverAutoRemove:: "^gnumach-image.*";
APT::Never-MarkAuto-Sections "";
APT::Never-MarkAuto-Sections:: "metapackages";
APT::Never-MarkAuto-Sections:: "restricted/metapackages";
APT::Never-MarkAuto-Sections:: "universe/metapackages";
APT::Never-MarkAuto-Sections:: "multiverse/metapackages";
APT::Never-MarkAuto-Sections:: "oldlibs";
APT::Never-MarkAuto-Sections:: "restricted/oldlibs";
APT::Never-MarkAuto-Sections:: "universe/oldlibs";
APT::Never-MarkAuto-Sections:: "multiverse/oldlibs";
APT::Periodic "";
APT::Periodic::MaxSize "100";
APT::Periodic::MaxAge "30";
APT::Archives "";
APT::Archives::MaxSize "100";
APT::Archives::MaxAge "30";
APT::Architectures "";
APT::Architectures:: "amd64";
APT::Architectures:: "i386";
APT::Compressor "";
APT::Compressor::. "";
APT::Compressor::.::Name ".";
APT::Compressor::.::Extension "";
APT::Compressor::.::Binary "";
APT::Compressor::.::Cost "1";
APT::Compressor::gzip "";
APT::Compressor::gzip::Name "gzip";
APT::Compressor::gzip::Extension ".gz";
APT::Compressor::gzip::Binary "gzip";
APT::Compressor::gzip::Cost "2";
APT::Compressor::gzip::CompressArg "";
APT::Compressor::gzip::CompressArg:: "-9n";
APT::Compressor::gzip::UncompressArg "";
APT::Compressor::gzip::UncompressArg:: "-d";
APT::Compressor::bzip2 "";
APT::Compressor::bzip2::Name "bzip2";
APT::Compressor::bzip2::Extension ".bz2";
APT::Compressor::bzip2::Binary "bzip2";
APT::Compressor::bzip2::Cost "3";
APT::Compressor::bzip2::CompressArg "";
APT::Compressor::bzip2::CompressArg:: "-9";
APT::Compressor::bzip2::UncompressArg "";
APT::Compressor::bzip2::UncompressArg:: "-d";
APT::Compressor::xz "";
APT::Compressor::xz::Name "xz";
APT::Compressor::xz::Extension ".xz";
APT::Compressor::xz::Binary "xz";
APT::Compressor::xz::Cost "4";
APT::Compressor::xz::CompressArg "";
APT::Compressor::xz::CompressArg:: "-6";
APT::Compressor::xz::UncompressArg "";
APT::Compressor::xz::UncompressArg:: "-d";
APT::Compressor::lzma "";
APT::Compressor::lzma::Name "lzma";
APT::Compressor::lzma::Extension ".lzma";
APT::Compressor::lzma::Binary "xz";
APT::Compressor::lzma::Cost "5";
APT::Compressor::lzma::CompressArg "";
APT::Compressor::lzma::CompressArg:: "--format=lzma";
APT::Compressor::lzma::CompressArg:: "-9";
APT::Compressor::lzma::UncompressArg "";
APT::Compressor::lzma::UncompressArg:: "--format=lzma";
APT::Compressor::lzma::UncompressArg:: "-d";
APT::Compressor::::Name "";
APT::Compressor::::Extension ".";
APT::Compressor::::Binary "";
APT::Compressor::::Cost "100";
APT::Compressor::::CompressArg "";
APT::Compressor::::CompressArg:: "-9";
APT::Compressor::::UncompressArg "";
APT::Compressor::::UncompressArg:: "-d";
Dir "/";
Dir::State "var/lib/apt/";
Dir::State::lists "lists/";
Dir::State::cdroms "cdroms.list";
Dir::State::mirrors "mirrors/";
Dir::State::extended_states "extended_states";
Dir::State::status "/var/lib/dpkg/status";
Dir::Cache "var/cache/apt/";
Dir::Cache::archives "archives/";
Dir::Cache::srcpkgcache "srcpkgcache.bin";
Dir::Cache::pkgcache "pkgcache.bin";
Dir::Etc "etc/apt/";
Dir::Etc::sourcelist "sources.list";
Dir::Etc::sourceparts "sources.list.d";
Dir::Etc::vendorlist "vendors.list";
Dir::Etc::vendorparts "vendors.list.d";
Dir::Etc::main "apt.conf";
Dir::Etc::netrc "auth.conf";
Dir::Etc::parts "apt.conf.d";
Dir::Etc::preferences "preferences";
Dir::Etc::preferencesparts "preferences.d";
Dir::Etc::trusted "trusted.gpg";
Dir::Etc::trustedparts "trusted.gpg.d";
Dir::Bin "";
Dir::Bin::methods "/usr/lib/apt/methods";
Dir::Bin::solvers "";
Dir::Bin::solvers:: "/usr/lib/apt/solvers";
Dir::Bin::dpkg "/usr/bin/dpkg";
Dir::Bin::bzip2 "/bin/bzip2";
Dir::Bin::xz "/usr/bin/xz";
Dir::Media "";
Dir::Media::MountPath "/media/apt";
Dir::Log "var/log/apt";
Dir::Log::Terminal "term.log";
Dir::Log::History "history.log";
Dir::Ignore-Files-Silently "";
Dir::Ignore-Files-Silently:: "~$";
Dir::Ignore-Files-Silently:: "\.disabled$";
Dir::Ignore-Files-Silently:: "\.bak$";
Dir::Ignore-Files-Silently:: "\.dpkg-[a-z]+$";
Dir::Ignore-Files-Silently:: "\.save$";
Dir::Ignore-Files-Silently:: "\.orig$";
Acquire "";
Acquire::cdrom "";
Acquire::cdrom::mount "/media/cdrom/";
Acquire::Languages "";
Acquire::Languages:: "en";
Acquire::Languages:: "none";
DPkg "";
DPkg::Pre-Install-Pkgs "";
DPkg::Pre-Install-Pkgs:: "/usr/bin/apt-listchanges --apt || test $? -ne 10";
DPkg::Pre-Install-Pkgs:: "/usr/sbin/dpkg-preconfigure --apt || true";
DPkg::Tools "";
DPkg::Tools::Options "";
DPkg::Tools::Options::/usr/bin/apt-listchanges "";
DPkg::Tools::Options::/usr/bin/apt-listchanges::Version "2";
CommandLine "";
CommandLine::AsString "apt-config dump";

-- (no /etc/apt/preferences present) --


-- /etc/apt/sources.list --

# deb http://ftp.ee.debian.org/debian/ wheezy main

deb http://ftp.ee.debian.org/debian/ wheezy main non-free contrib
deb-src http://ftp.ee.debian.org/debian/ wheezy main non-free contrib

deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free

# wheezy-updates, previously known as 'volatile'
deb http://ftp.ee.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.ee.debian.org/debian/ wheezy-updates main contrib non-free

-- System Information:
Debian Release: 7.8
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.ISO-8859-15, LC_CTYPE=en_GB.ISO-8859-15 (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/dash

Versions of packages apt depends on:
ii  debian-archive-keyring  2014.3~deb7u1
ii  gnupg                   1.4.12-7+deb7u7
ii  libapt-pkg4.12          0.9.7.9+deb7u7
ii  libc6                   2.13-38+deb7u8
ii  libgcc1                 1:4.7.2-5
ii  libstdc++6              4.7.2-5

apt recommends no packages.

Versions of packages apt suggests:
pn  apt-doc     <none>
ii  aptitude    0.6.8.2-1
pn  dpkg-dev    <none>
ii  python-apt  0.8.8.2
ii  xz-utils    5.1.1alpha+20120614-2

-- no debconf information

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- Bug#782608: marked as done (apt: config files sometimes being ignored)
  - From: owner@bugs.debian.org (Debian Bug Tracking System)

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