CDROM method

Author: jgg
Date: 1998-12-03 07:29:16 GMT
CDROM method

2 files changed, 150 insertions, 0 deletions

diff --git a/methods/cdrom.cc b/methods/cdrom.cc
new file mode 100644
index 000000000..0d1e8f031
--- /dev/null
+++ b/methods/cdrom.cc
@@ -0,0 +1,144 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: cdrom.cc,v 1.1 1998/12/03 07:29:21 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);
+      MediaFail(Get.Host,CDROM);
+      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();
+}
diff --git a/methods/makefile b/methods/makefile
index b05356bb4..2940b891d 100644
--- a/methods/makefile
+++ b/methods/makefile
@@ -24,6 +24,12 @@ SLIBS = -lapt-pkg
 SOURCE = gzip.cc
 include $(PROGRAM_H)
 
+# The cdrom method
+PROGRAM=cdrom
+SLIBS = -lapt-pkg 
+SOURCE = cdrom.cc
+include $(PROGRAM_H)
+
 # The http method
 PROGRAM=http
 SLIBS = -lapt-pkg