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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: cdrom.cc,v 1.2 1998/12/04 22:56:55 jgg Exp $
/* ######################################################################
CDROM URI method for APT
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/cdromutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/fileutl.h>
#include <sys/stat.h>
#include <unistd.h>
/*}}}*/
class CDROMMethod : public pkgAcqMethod
{
Configuration Database;
string CurrentID;
virtual bool Fetch(FetchItem *Itm);
string GetID(string Name);
public:
CDROMMethod();
};
// CDROMMethod::CDROMethod - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
CDROMMethod::CDROMMethod() : pkgAcqMethod("1.0",SingleInstance | LocalOnly)
{
// Read the database
string DFile = _config->FindFile("Dir::State::cdroms");
if (FileExists(DFile) == true)
{
if (ReadConfigFile(Database,DFile) == false)
{
_error->Error("Unable to read the cdrom database %s",
DFile.c_str());
Fail();
}
}
};
/*}}}*/
// CDROMMethod::GetID - Get the ID hash for /*{{{*/
// ---------------------------------------------------------------------
/* We search the configuration space for the name and then return the ID
tag associated with it. */
string CDROMMethod::GetID(string Name)
{
const Configuration::Item *Top = Database.Tree(0);
for (; Top != 0;)
{
if (Top->Value == Name)
return Top->Tag;
Top = Top->Next;
}
return string();
}
/*}}}*/
// CDROMMethod::Fetch - Fetch a file /*{{{*/
// ---------------------------------------------------------------------
/* */
bool CDROMMethod::Fetch(FetchItem *Itm)
{
URI Get = Itm->Uri;
string File = Get.Path;
FetchResult Res;
/* 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;
URIDone(Res);
return true;
}
string ID = GetID(Get.Host);
// All non IMS queries for package files fail.
if (Itm->IndexFile == true || ID.empty() == false)
{
Fail("Please use apt-cdrom to make this CD recognized by APT."
" apt-get update cannot be used to add new CDs");
return true;
}
// We already have a CD inserted, but it is the wrong one
if (CurrentID.empty() == false && ID != CurrentID)
{
Fail("Wrong CD",true);
return true;
}
string CDROM = _config->FindDir("Acquire::cdrom::mount","/cdrom/");
string NewID;
while (1)
{
if (IdentCdrom(CDROM,NewID) == false)
return false;
// A hit
if (NewID == ID)
break;
UnmountCdrom(CDROM);
if (MediaFail(Get.Host,CDROM) == false)
{
ID = "FAIL";
break;
}
MountCdrom(CDROM);
}
// ID matches
if (NewID == ID)
{
Res.Filename = CDROM + File;
if (FileExists(Res.Filename) == false)
return _error->Error("File not found");
CurrentID = ID;
Res.LastModified = Itm->LastModified;
Res.IMSHit = true;
URIDone(Res);
return true;
}
return _error->Error("CDROM not found");
}
/*}}}*/
int main()
{
CDROMMethod Mth;
return Mth.Run();
}
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