diff options
Diffstat (limited to 'apt-pkg/clean.cc')
| -rw-r--r-- | apt-pkg/clean.cc | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/apt-pkg/clean.cc b/apt-pkg/clean.cc new file mode 100644 index 0000000..f335554 --- /dev/null +++ b/apt-pkg/clean.cc @@ -0,0 +1,151 @@ +// -*- 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; + + auto const withoutChangingDir = dynamic_cast<pkgArchiveCleaner2*>(this); + 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()); + std::string CWD; + if (withoutChangingDir == nullptr) + { + CWD = SafeGetCWD(); + if (fchdir(dirfd) != 0) + return _error->Errno("fchdir",_("Unable to change to %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; + } + + if (withoutChangingDir == nullptr) + { + APT_IGNORE_DEPRECATED_PUSH + Erase(Dir->d_name, Pkg, Ver, St); + APT_IGNORE_DEPRECATED_POP + } + else + withoutChangingDir->Erase(dirfd, Dir->d_name, Pkg, Ver, St); + } + closedir(D); + if (withoutChangingDir == nullptr && chdir(CWD.c_str()) != 0) + return _error->Errno("chdir", _("Unable to change to %s"),Dir.c_str()); + return true; +} + /*}}}*/ + +pkgArchiveCleaner::pkgArchiveCleaner() : d(NULL) {} +pkgArchiveCleaner::~pkgArchiveCleaner() {} |