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-rw-r--r--methods/cdrom.cc289
1 files changed, 289 insertions, 0 deletions
diff --git a/methods/cdrom.cc b/methods/cdrom.cc
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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ CDROM URI method for APT
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cdrom.h>
+#include <apt-pkg/cdromutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/strutl.h>
+
+#include "aptmethod.h"
+
+#include <string>
+#include <vector>
+#include <sys/stat.h>
+
+#include <iostream>
+#include <apti18n.h>
+ /*}}}*/
+
+using namespace std;
+
+class CDROMMethod : public aptMethod
+{
+ bool DatabaseLoaded;
+ bool Debug;
+
+ ::Configuration Database;
+ string CurrentID;
+ string CDROM;
+ bool MountedByApt;
+ pkgUdevCdromDevices UdevCdroms;
+
+ bool IsCorrectCD(URI want, string MountPath, string& NewID);
+ bool AutoDetectAndMount(const URI, string &NewID);
+ virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
+ std::string GetID(std::string const &Name);
+ virtual void Exit() APT_OVERRIDE;
+ virtual bool Configuration(std::string Message) APT_OVERRIDE;
+
+ public:
+
+ CDROMMethod();
+};
+
+// CDROMMethod::CDROMethod - Constructor /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+CDROMMethod::CDROMMethod() : aptMethod("cdrom", "1.0",SingleInstance | LocalOnly |
+ SendConfig | NeedsCleanup |
+ Removable | SendURIEncoded),
+ DatabaseLoaded(false),
+ Debug(false),
+ MountedByApt(false)
+{
+}
+ /*}}}*/
+// CDROMMethod::Exit - Unmount the disc if necessary /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void CDROMMethod::Exit()
+{
+ if (MountedByApt == true)
+ UnmountCdrom(CDROM);
+}
+ /*}}}*/
+// CDROMMethod::GetID - Search the database for a matching string /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+std::string CDROMMethod::GetID(std::string const &Name)
+{
+ // Search for an ID
+ const Configuration::Item *Top = Database.Tree("CD");
+ if (Top != 0)
+ Top = Top->Child;
+
+ for (; Top != 0;)
+ {
+ if (Top->Value == Name)
+ return Top->Tag;
+
+ Top = Top->Next;
+ }
+ return string();
+}
+ /*}}}*/
+// CDROMMethod::AutoDetectAndMount /*{{{*/
+// ---------------------------------------------------------------------
+/* Modifies class variable CDROM to the mountpoint */
+bool CDROMMethod::AutoDetectAndMount(const URI Get, string &NewID)
+{
+ vector<struct CdromDevice> v = UdevCdroms.Scan();
+
+ // first check if its mounted somewhere already
+ for (unsigned int i=0; i < v.size(); i++)
+ {
+ if (v[i].Mounted)
+ {
+ if (Debug)
+ clog << "Checking mounted cdrom device " << v[i].DeviceName << endl;
+ if (IsCorrectCD(Get, v[i].MountPath, NewID))
+ {
+ CDROM = v[i].MountPath;
+ return true;
+ }
+ }
+ }
+
+ // we are not supposed to mount, exit
+ if (_config->FindB("APT::CDROM::NoMount",false) == true)
+ return false;
+
+ // check if we have the mount point
+ string AptMountPoint = _config->FindDir("Dir::Media::MountPath");
+ if (!FileExists(AptMountPoint))
+ mkdir(AptMountPoint.c_str(), 0750);
+
+ // now try mounting
+ for (unsigned int i=0; i < v.size(); i++)
+ {
+ if (!v[i].Mounted)
+ {
+ if(MountCdrom(AptMountPoint, v[i].DeviceName))
+ {
+ if (IsCorrectCD(Get, AptMountPoint, NewID))
+ {
+ MountedByApt = true;
+ CDROM = AptMountPoint;
+ return true;
+ } else {
+ UnmountCdrom(AptMountPoint);
+ }
+ }
+ }
+ }
+
+ return false;
+}
+ /*}}}*/
+// CDROMMethod::IsCorrectCD /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CDROMMethod::IsCorrectCD(URI want, string MountPath, string& NewID)
+{
+ for (unsigned int Version = 2; Version != 0; Version--)
+ {
+ if (IdentCdrom(MountPath,NewID,Version) == false)
+ return false;
+
+ if (Debug)
+ clog << "ID " << Version << " " << NewID << endl;
+
+ // A hit
+ if (Database.Find("CD::" + NewID) == want.Host)
+ return true;
+ }
+
+ return false;
+}
+ /*}}}*/
+// CDROMMethod::Fetch - Fetch a file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CDROMMethod::Fetch(FetchItem *Itm)
+{
+ FetchResult Res;
+
+ URI Get(Itm->Uri);
+ std::string const File = DecodeSendURI(Get.Path);
+ Debug = DebugEnabled();
+
+ if (Debug)
+ clog << "CDROMMethod::Fetch " << Itm->Uri << endl;
+
+ /* All IMS queries are returned as a hit, CDROMs are readonly so
+ time stamps never change */
+ if (Itm->LastModified != 0)
+ {
+ Res.LastModified = Itm->LastModified;
+ Res.IMSHit = true;
+ Res.Filename = Itm->DestFile;
+ URIDone(Res);
+ return true;
+ }
+
+ // Load the database
+ if (DatabaseLoaded == false)
+ {
+ // Read the database
+ string DFile = _config->FindFile("Dir::State::cdroms");
+ if (FileExists(DFile) == true)
+ {
+ if (ReadConfigFile(Database,DFile) == false)
+ return _error->Error(_("Unable to read the cdrom database %s"),
+ DFile.c_str());
+ }
+ DatabaseLoaded = true;
+ }
+
+ // All non IMS queries for package files fail.
+ if (Itm->IndexFile == true || GetID(Get.Host).empty() == true)
+ {
+ Fail(_("Please use apt-cdrom to make this CD-ROM recognized by APT."
+ " apt-get update cannot be used to add new CD-ROMs"));
+ return true;
+ }
+
+ // We already have a CD inserted, but it is the wrong one
+ if (CurrentID.empty() == false &&
+ CurrentID != "FAIL" &&
+ Database.Find("CD::" + CurrentID) != Get.Host)
+ {
+ Fail(_("Wrong CD-ROM"),true);
+ return true;
+ }
+
+ bool const AutoDetect = ConfigFindB("AutoDetect", true);
+ CDROM = _config->FindDir("Acquire::cdrom::mount");
+ if (Debug)
+ clog << "Looking for CDROM at " << CDROM << endl;
+
+ if (CDROM[0] == '.')
+ CDROM= SafeGetCWD() + '/' + CDROM;
+
+ string NewID;
+ while (CurrentID.empty() == true)
+ {
+ if (AutoDetect)
+ AutoDetectAndMount(Get, NewID);
+
+ if(!IsMounted(CDROM))
+ MountedByApt = MountCdrom(CDROM);
+
+ if (IsCorrectCD(Get, CDROM, NewID))
+ break;
+
+ // I suppose this should prompt somehow?
+ if (_config->FindB("APT::CDROM::NoMount",false) == false &&
+ UnmountCdrom(CDROM) == false)
+ return _error->Error(_("Unable to unmount the CD-ROM in %s, it may still be in use."),
+ CDROM.c_str());
+ if (MediaFail(Get.Host,CDROM) == false)
+ {
+ CurrentID = "FAIL";
+ return _error->Error(_("Disk not found."));
+ }
+ }
+
+ // Found a CD
+ Res.Filename = CDROM + File;
+ struct stat Buf;
+ if (stat(Res.Filename.c_str(),&Buf) != 0)
+ return _error->Error(_("File not found"));
+
+ URIStart(Res);
+ if (NewID.empty() == false)
+ CurrentID = NewID;
+ Res.LastModified = Buf.st_mtime;
+ Res.Size = Buf.st_size;
+
+ Hashes Hash(Itm->ExpectedHashes);
+ FileFd Fd(Res.Filename, FileFd::ReadOnly);
+ Hash.AddFD(Fd);
+ Res.TakeHashes(Hash);
+
+ URIDone(Res);
+ return true;
+}
+ /*}}}*/
+bool CDROMMethod::Configuration(std::string Message) /*{{{*/
+{
+ _config->CndSet("Binary::cdrom::Debug::NoDropPrivs", true);
+ return aptMethod::Configuration(Message);
+}
+ /*}}}*/
+
+int main()
+{
+ return CDROMMethod().Run();
+}