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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: cdrom.cc,v 1.20.2.1 2004/01/16 18:58:50 mdz Exp $
/* ######################################################################
CDROM URI method for APT
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/cdrom.h>
#include <apt-pkg/cdromutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/hashes.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dlfcn.h>
#include <iostream>
#include <apti18n.h>
/*}}}*/
using namespace std;
class CDROMMethod : public pkgAcqMethod
{
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);
string GetID(string Name);
virtual void Exit();
public:
CDROMMethod();
};
// CDROMMethod::CDROMethod - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
CDROMMethod::CDROMMethod() : pkgAcqMethod("1.0",SingleInstance | LocalOnly |
SendConfig | NeedsCleanup |
Removable),
DatabaseLoaded(false),
MountedByApt(false)
{
UdevCdroms.Dlopen();
};
/*}}}*/
// CDROMMethod::Exit - Unmount the disc if necessary /*{{{*/
// ---------------------------------------------------------------------
/* */
void CDROMMethod::Exit()
{
if (MountedByApt == true)
UnmountCdrom(CDROM);
}
/*}}}*/
// CDROMMethod::GetID - Search the database for a matching string /*{{{*/
// ---------------------------------------------------------------------
/* */
string CDROMMethod::GetID(string 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 varaiable 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;
string File = Get.Path;
Debug = _config->FindB("Debug::Acquire::cdrom", false);
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 AutoDetect = _config->FindB("Acquire::cdrom::AutoDetect", true);
CDROM = _config->FindDir("Acquire::cdrom::mount","/cdrom/");
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"));
if (NewID.empty() == false)
CurrentID = NewID;
Res.LastModified = Buf.st_mtime;
Res.Size = Buf.st_size;
Hashes Hash;
FileFd Fd(Res.Filename, FileFd::ReadOnly);
Hash.AddFD(Fd.Fd(), Fd.Size());
Res.TakeHashes(Hash);
URIDone(Res);
return true;
}
/*}}}*/
int main()
{
setlocale(LC_ALL, "");
CDROMMethod Mth;
return Mth.Run();
}