Merge branch 'fix/dpkgchroot' into 'main'

Restore dpkg::chroot-directory functionality

See merge request apt-team/apt!178

3 files changed, 26 insertions, 30 deletions

diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc
index a0200305d..c9c6a7e85 100644
--- a/apt-pkg/deb/debsystem.cc
+++ b/apt-pkg/deb/debsystem.cc
@@ -358,19 +358,22 @@ bool debSystem::FindIndex(pkgCache::PkgFileIterator File,
    return false;
 }
 									/*}}}*/
-
+std::string debSystem::StripDpkgChrootDirectory(std::string const &File)/*{{{*/
+{
+   // If the filename string begins with DPkg::Chroot-Directory, return the
+   // substr that is within the chroot so dpkg can access it.
+   std::string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
+   size_t len = chrootdir.length();
+   if (chrootdir == "/" || File.compare(0, len, chrootdir) != 0)
+      return File;
+   if (chrootdir.at(len - 1) == '/')
+      --len;
+   return File.substr(len);
+}
+									/*}}}*/
 std::string debSystem::GetDpkgExecutable()				/*{{{*/
 {
-   string Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
-   string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/");
-   size_t dpkgChrootLen = dpkgChrootDir.length();
-   if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0)
-   {
-      if (dpkgChrootDir[dpkgChrootLen - 1] == '/')
-         --dpkgChrootLen;
-      Tmp = Tmp.substr(dpkgChrootLen);
-   }
-   return Tmp;
+   return StripDpkgChrootDirectory(_config->Find("Dir::Bin::dpkg","dpkg"));
 }
 									/*}}}*/
 std::vector<std::string> debSystem::GetDpkgBaseCommand()		/*{{{*/
diff --git a/apt-pkg/deb/debsystem.h b/apt-pkg/deb/debsystem.h
index b3d241512..c426faf81 100644
--- a/apt-pkg/deb/debsystem.h
+++ b/apt-pkg/deb/debsystem.h
@@ -43,6 +43,7 @@ class debSystem : public pkgSystem
    APT_HIDDEN static std::string GetDpkgExecutable();
    APT_HIDDEN static std::vector<std::string> GetDpkgBaseCommand();
    APT_HIDDEN static void DpkgChrootDirectory();
+   APT_HIDDEN static std::string StripDpkgChrootDirectory(std::string const &File);
    APT_HIDDEN static pid_t ExecDpkg(std::vector<std::string> const &sArgs, int * const inputFd, int * const outputFd, bool const DiscardOutput);
    bool MultiArchSupported() const override;
    static bool AssertFeature(std::string const &Feature);
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index c1a9f6f68..09d605feb 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -248,19 +248,7 @@ bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
    if (File.empty() == true || Pkg.end() == true)
       return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str());
 
-   // If the filename string begins with DPkg::Chroot-Directory, return the
-   // substr that is within the chroot so dpkg can access it.
-   string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
-   if (chrootdir != "/" && File.find(chrootdir) == 0)
-   {
-      size_t len = chrootdir.length();
-      if (chrootdir.at(len - 1) == '/')
-        len--;
-      List.push_back(Item(Item::Install,Pkg,File.substr(len)));
-   }
-   else
-      List.push_back(Item(Item::Install,Pkg,File));
-
+   List.emplace_back(Item::Install, Pkg, debSystem::StripDpkgChrootDirectory(File));
    return true;
 }
 									/*}}}*/
@@ -1855,6 +1843,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
       }
 
       std::unique_ptr<char, decltype(&cleanUpTmpDir)> tmpdir_for_dpkg_recursive{nullptr, &cleanUpTmpDir};
+      std::string const dpkg_chroot_dir = _config->FindDir("DPkg::Chroot-Directory", "/");
 
       // Write in the file or package names
       if (I->Op == Item::Install)
@@ -1862,11 +1851,14 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
 	 auto const installsToDo = J - I;
 	 if (dpkg_recursive_install == true && dpkg_recursive_install_min < installsToDo)
 	 {
-	    std::string tmpdir;
-	    strprintf(tmpdir, "%s/apt-dpkg-install-XXXXXX", GetTempDir().c_str());
-	    tmpdir_for_dpkg_recursive.reset(strndup(tmpdir.data(), tmpdir.length()));
-	    if (mkdtemp(tmpdir_for_dpkg_recursive.get()) == nullptr)
-	       return _error->Errno("DPkg::Go", "mkdtemp of %s failed in preparation of calling dpkg unpack", tmpdir_for_dpkg_recursive.get());
+	    {
+	       std::string basetmpdir = (dpkg_chroot_dir == "/") ? GetTempDir() : flCombine(dpkg_chroot_dir, "tmp");
+	       std::string tmpdir;
+	       strprintf(tmpdir, "%s/apt-dpkg-install-XXXXXX", basetmpdir.c_str());
+	       tmpdir_for_dpkg_recursive.reset(strndup(tmpdir.data(), tmpdir.length()));
+	       if (mkdtemp(tmpdir_for_dpkg_recursive.get()) == nullptr)
+		  return _error->Errno("DPkg::Go", "mkdtemp of %s failed in preparation of calling dpkg unpack", tmpdir_for_dpkg_recursive.get());
+	    }
 
 	    char p = 1;
 	    for (auto c = installsToDo - 1; (c = c/10) != 0; ++p);
@@ -1886,7 +1878,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress)
 		  return _error->Errno("DPkg::Go", "Symlinking %s to %s failed!", I->File.c_str(), linkpath.c_str());
 	    }
 	    Args.push_back("--recursive");
-	    Args.push_back(tmpdir_for_dpkg_recursive.get());
+	    Args.push_back(debSystem::StripDpkgChrootDirectory(tmpdir_for_dpkg_recursive.get()));
 	 }
 	 else
 	 {