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-rw-r--r--apt-pkg/clean.cc134
1 files changed, 134 insertions, 0 deletions
diff --git a/apt-pkg/clean.cc b/apt-pkg/clean.cc
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+++ b/apt-pkg/clean.cc
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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ Clean - Clean out downloaded directories
+
+ ##################################################################### */
+ /*}}}*/
+// Includes /*{{{*/
+#include <config.h>
+
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/clean.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/strutl.h>
+
+#include <string>
+#include <dirent.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <apti18n.h>
+ /*}}}*/
+// ArchiveCleaner::Go - Perform smart cleanup of the archive /*{{{*/
+// ---------------------------------------------------------------------
+/* Scan the directory for files to erase, we check the version information
+ against our database to see if it is interesting */
+bool pkgArchiveCleaner::Go(std::string Dir,pkgCache &Cache)
+{
+ bool CleanInstalled = _config->FindB("APT::Clean-Installed",true);
+
+ if(Dir == "/")
+ return _error->Error(_("Clean of %s is not supported"), Dir.c_str());
+
+ // non-existing directories are always clean
+ // we do not check for a directory explicitly to support symlinks
+ if (FileExists(Dir) == false)
+ return true;
+
+ int const dirfd = open(Dir.c_str(), O_RDONLY | O_DIRECTORY | O_CLOEXEC);
+ if (dirfd == -1)
+ return _error->Errno("open",_("Unable to read %s"),Dir.c_str());
+ DIR * const D = fdopendir(dirfd);
+ if (D == nullptr)
+ return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
+
+ for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
+ {
+ // Skip some files..
+ if (strcmp(Dir->d_name, "lock") == 0 ||
+ strcmp(Dir->d_name, "partial") == 0 ||
+ strcmp(Dir->d_name, "auxfiles") == 0 ||
+ strcmp(Dir->d_name, "lost+found") == 0 ||
+ strcmp(Dir->d_name, ".") == 0 ||
+ strcmp(Dir->d_name, "..") == 0)
+ continue;
+
+ struct stat St;
+ if (fstatat(dirfd, Dir->d_name,&St, 0) != 0)
+ {
+ _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
+ closedir(D);
+ return false;
+ }
+
+ // Grab the package name
+ const char *I = Dir->d_name;
+ for (; *I != 0 && *I != '_';I++);
+ if (*I != '_')
+ continue;
+ std::string Pkg = DeQuoteString(std::string(Dir->d_name,I-Dir->d_name));
+
+ // Grab the version
+ const char *Start = I + 1;
+ for (I = Start; *I != 0 && *I != '_';I++);
+ if (*I != '_')
+ continue;
+ std::string Ver = DeQuoteString(std::string(Start,I-Start));
+
+ // Grab the arch
+ Start = I + 1;
+ for (I = Start; *I != 0 && *I != '.' ;I++);
+ if (*I != '.')
+ continue;
+ std::string const Arch = DeQuoteString(std::string(Start,I-Start));
+
+ // ignore packages of unconfigured architectures
+ if (APT::Configuration::checkArchitecture(Arch) == false)
+ continue;
+
+ // Lookup the package
+ pkgCache::PkgIterator P = Cache.FindPkg(Pkg, Arch);
+ if (P.end() != true)
+ {
+ pkgCache::VerIterator V = P.VersionList();
+ for (; V.end() == false; ++V)
+ {
+ // See if we can fetch this version at all
+ bool IsFetchable = false;
+ for (pkgCache::VerFileIterator J = V.FileList();
+ J.end() == false; ++J)
+ {
+ if (CleanInstalled == true &&
+ J.File().Flagged(pkgCache::Flag::NotSource))
+ continue;
+ IsFetchable = true;
+ break;
+ }
+
+ // See if this version matches the file
+ if (IsFetchable == true && Ver == V.VerStr())
+ break;
+ }
+
+ // We found a match, keep the file
+ if (V.end() == false)
+ continue;
+ }
+
+ Erase(dirfd, Dir->d_name, Pkg, Ver, St);
+ }
+ closedir(D);
+ return true;
+}
+ /*}}}*/
+
+pkgArchiveCleaner::pkgArchiveCleaner() : d(NULL) {}
+pkgArchiveCleaner::~pkgArchiveCleaner() {}