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- // -*- mode: cpp; mode: fold -*-
- // Description /*{{{*/
- // $Id: debsystem.cc,v 1.4 2004/01/26 17:01:53 mdz Exp $
- /* ######################################################################
- System - Abstraction for running on different systems.
- Basic general structure..
-
- ##################################################################### */
- /*}}}*/
- // Include Files /*{{{*/
- #include <config.h>
- #include <apt-pkg/debsystem.h>
- #include <apt-pkg/debversion.h>
- #include <apt-pkg/debindexfile.h>
- #include <apt-pkg/dpkgpm.h>
- #include <apt-pkg/configuration.h>
- #include <apt-pkg/error.h>
- #include <apt-pkg/fileutl.h>
- #include <sys/types.h>
- #include <unistd.h>
- #include <dirent.h>
- #include <errno.h>
- #include <apti18n.h>
- /*}}}*/
- using std::string;
- debSystem debSys;
- class debSystemPrivate {
- public:
- debSystemPrivate() : LockFD(-1), LockCount(0), StatusFile(0)
- {
- }
- // For locking support
- int LockFD;
- unsigned LockCount;
-
- debStatusIndex *StatusFile;
- };
- // System::debSystem - Constructor /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- debSystem::debSystem()
- {
- d = new debSystemPrivate();
- Label = "Debian dpkg interface";
- VS = &debVS;
- }
- /*}}}*/
- // System::~debSystem - Destructor /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- debSystem::~debSystem()
- {
- delete d->StatusFile;
- delete d;
- }
- /*}}}*/
- // System::Lock - Get the lock /*{{{*/
- // ---------------------------------------------------------------------
- /* This mirrors the operations dpkg does when it starts up. Note the
- checking of the updates directory. */
- bool debSystem::Lock()
- {
- // Disable file locking
- if (_config->FindB("Debug::NoLocking",false) == true || d->LockCount > 1)
- {
- d->LockCount++;
- return true;
- }
- // Create the lockfile
- string AdminDir = flNotFile(_config->Find("Dir::State::status"));
- d->LockFD = GetLock(AdminDir + "lock");
- if (d->LockFD == -1)
- {
- if (errno == EACCES || errno == EAGAIN)
- return _error->Error(_("Unable to lock the administration directory (%s), "
- "is another process using it?"),AdminDir.c_str());
- else
- return _error->Error(_("Unable to lock the administration directory (%s), "
- "are you root?"),AdminDir.c_str());
- }
-
- // See if we need to abort with a dirty journal
- if (CheckUpdates() == true)
- {
- close(d->LockFD);
- d->LockFD = -1;
- const char *cmd;
- if (getenv("SUDO_USER") != NULL)
- cmd = "sudo dpkg --configure -a";
- else
- cmd = "dpkg --configure -a";
- // TRANSLATORS: the %s contains the recovery command, usually
- // dpkg --configure -a
- return _error->Error(_("dpkg was interrupted, you must manually "
- "run '%s' to correct the problem. "), cmd);
- }
- d->LockCount++;
-
- return true;
- }
- /*}}}*/
- // System::UnLock - Drop a lock /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- bool debSystem::UnLock(bool NoErrors)
- {
- if (d->LockCount == 0 && NoErrors == true)
- return false;
-
- if (d->LockCount < 1)
- return _error->Error(_("Not locked"));
- if (--d->LockCount == 0)
- {
- close(d->LockFD);
- d->LockCount = 0;
- }
-
- return true;
- }
- /*}}}*/
- // System::CheckUpdates - Check if the updates dir is dirty /*{{{*/
- // ---------------------------------------------------------------------
- /* This does a check of the updates directory (dpkg journal) to see if it has
- any entries in it. */
- bool debSystem::CheckUpdates()
- {
- // Check for updates.. (dirty)
- string File = flNotFile(_config->Find("Dir::State::status")) + "updates/";
- DIR *DirP = opendir(File.c_str());
- if (DirP == 0)
- return false;
-
- /* We ignore any files that are not all digits, this skips .,.. and
- some tmp files dpkg will leave behind.. */
- bool Damaged = false;
- for (struct dirent *Ent = readdir(DirP); Ent != 0; Ent = readdir(DirP))
- {
- Damaged = true;
- for (unsigned int I = 0; Ent->d_name[I] != 0; I++)
- {
- // Check if its not a digit..
- if (isdigit(Ent->d_name[I]) == 0)
- {
- Damaged = false;
- break;
- }
- }
- if (Damaged == true)
- break;
- }
- closedir(DirP);
- return Damaged;
- }
- /*}}}*/
- // System::CreatePM - Create the underlying package manager /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- pkgPackageManager *debSystem::CreatePM(pkgDepCache *Cache) const
- {
- return new pkgDPkgPM(Cache);
- }
- /*}}}*/
- // System::Initialize - Setup the configuration space.. /*{{{*/
- // ---------------------------------------------------------------------
- /* These are the Debian specific configuration variables.. */
- bool debSystem::Initialize(Configuration &Cnf)
- {
- /* These really should be jammed into a generic 'Local Database' engine
- which is yet to be determined. The functions in pkgcachegen should
- be the only users of these */
- Cnf.CndSet("Dir::State::extended_states", "extended_states");
- Cnf.CndSet("Dir::State::status","/var/lib/dpkg/status");
- Cnf.CndSet("Dir::Bin::dpkg","/usr/bin/dpkg");
- if (d->StatusFile) {
- delete d->StatusFile;
- d->StatusFile = 0;
- }
- return true;
- }
- /*}}}*/
- // System::ArchiveSupported - Is a file format supported /*{{{*/
- // ---------------------------------------------------------------------
- /* The standard name for a deb is 'deb'.. There are no separate versions
- of .deb to worry about.. */
- bool debSystem::ArchiveSupported(const char *Type)
- {
- if (strcmp(Type,"deb") == 0)
- return true;
- return false;
- }
- /*}}}*/
- // System::Score - Determine how 'Debiany' this sys is.. /*{{{*/
- // ---------------------------------------------------------------------
- /* We check some files that are sure tell signs of this being a Debian
- System.. */
- signed debSystem::Score(Configuration const &Cnf)
- {
- signed Score = 0;
- if (FileExists(Cnf.FindFile("Dir::State::status","/var/lib/dpkg/status")) == true)
- Score += 10;
- if (FileExists(Cnf.FindFile("Dir::Bin::dpkg","/usr/bin/dpkg")) == true)
- Score += 10;
- if (FileExists("/etc/debian_version") == true)
- Score += 10;
- return Score;
- }
- /*}}}*/
- // System::AddStatusFiles - Register the status files /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- bool debSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)
- {
- if (d->StatusFile == 0)
- d->StatusFile = new debStatusIndex(_config->FindFile("Dir::State::status"));
- List.push_back(d->StatusFile);
- return true;
- }
- /*}}}*/
- // System::FindIndex - Get an index file for status files /*{{{*/
- // ---------------------------------------------------------------------
- /* */
- bool debSystem::FindIndex(pkgCache::PkgFileIterator File,
- pkgIndexFile *&Found) const
- {
- if (d->StatusFile == 0)
- return false;
- if (d->StatusFile->FindInCache(*File.Cache()) == File)
- {
- Found = d->StatusFile;
- return true;
- }
-
- return false;
- }
- /*}}}*/
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