cdrom and source support

Author: jgg
Date: 1999-07-12 02:59:36 GMT
cdrom and source support

1 files changed, 535 insertions, 0 deletions

diff --git a/cmdline/indexcopy.cc b/cmdline/indexcopy.cc
new file mode 100644
index 000000000..39057301f
--- /dev/null
+++ b/cmdline/indexcopy.cc
@@ -0,0 +1,535 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: indexcopy.cc,v 1.1 1999/07/12 02:59:36 jgg Exp $
+/* ######################################################################
+
+   Index Copying - Aid for copying and verifying the index files
+   
+   This class helps apt-cache reconstruct a damaged index files. 
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include "indexcopy.h"
+
+#include <apt-pkg/error.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/tagfile.h>
+
+#include <iostream.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <wait.h>
+									/*}}}*/
+
+// IndexCopy::CopyPackages - Copy the package files from the CD		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool IndexCopy::CopyPackages(string CDROM,string Name,vector<string> &List)
+{
+   if (List.size() == 0)
+      return true;
+   
+   OpTextProgress Progress;
+   
+   bool NoStat = _config->FindB("APT::CDROM::Fast",false);
+   bool Debug = _config->FindB("Debug::aptcdrom",false);
+   
+   // Prepare the progress indicator
+   unsigned long TotalSize = 0;
+   for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
+   {
+      struct stat Buf;
+      if (stat(string(*I + GetFileName()).c_str(),&Buf) != 0 &&
+	  stat(string(*I + GetFileName() + ".gz").c_str(),&Buf) != 0)
+	 return _error->Errno("stat","Stat failed for %s",
+			      string(*I + GetFileName()).c_str());
+      TotalSize += Buf.st_size;
+   }	
+
+   unsigned long CurrentSize = 0;
+   unsigned int NotFound = 0;
+   unsigned int WrongSize = 0;
+   unsigned int Packages = 0;
+   for (vector<string>::iterator I = List.begin(); I != List.end(); I++)
+   {      
+      string OrigPath = string(*I,CDROM.length());
+      unsigned long FileSize = 0;
+      
+      // Open the package file
+      FileFd Pkg;
+      if (FileExists(*I + GetFileName()) == true)
+      {
+	 Pkg.Open(*I + GetFileName(),FileFd::ReadOnly);
+	 FileSize = Pkg.Size();
+      }      
+      else
+      {
+	 FileFd From(*I + GetFileName() + ".gz",FileFd::ReadOnly);
+	 if (_error->PendingError() == true)
+	    return false;
+	 FileSize = From.Size();
+	 
+	 // Get a temp file
+	 FILE *tmp = tmpfile();
+	 if (tmp == 0)
+	    return _error->Errno("tmpfile","Unable to create a tmp file");
+	 Pkg.Fd(dup(fileno(tmp)));
+	 fclose(tmp);
+	 
+	 // Fork gzip
+	 int Process = fork();
+	 if (Process < 0)
+	    return _error->Errno("fork","Couldn't fork gzip");
+	 
+	 // The child
+	 if (Process == 0)
+	 {	    
+	    dup2(From.Fd(),STDIN_FILENO);
+	    dup2(Pkg.Fd(),STDOUT_FILENO);
+	    SetCloseExec(STDIN_FILENO,false);
+	    SetCloseExec(STDOUT_FILENO,false);
+	    
+	    const char *Args[3];
+	    Args[0] = _config->Find("Dir::bin::gzip","gzip").c_str();
+	    Args[1] = "-d";
+	    Args[2] = 0;
+	    execvp(Args[0],(char **)Args);
+	    exit(100);
+	 }
+	 
+	 // Wait for gzip to finish
+	 int Status;
+	 if (waitpid(Process,&Status,0) != Process)
+	    return _error->Errno("wait","Waiting for gzip failed");
+	 if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
+	    return _error->Error("gzip failed, perhaps the disk is full.");
+	 Pkg.Seek(0);
+      }
+      pkgTagFile Parser(Pkg);
+      if (_error->PendingError() == true)
+	 return false;
+      
+      // Open the output file
+      char S[400];
+      sprintf(S,"cdrom:%s/%s%s",Name.c_str(),(*I).c_str() + CDROM.length(),
+	      GetFileName());
+      string TargetF = _config->FindDir("Dir::State::lists") + "partial/";
+      TargetF += URItoFileName(S);
+      if (_config->FindB("APT::CDROM::NoAct",false) == true)
+	 TargetF = "/dev/null";
+      FileFd Target(TargetF,FileFd::WriteEmpty);      
+      if (_error->PendingError() == true)
+	 return false;
+      
+      // Setup the progress meter
+      Progress.OverallProgress(CurrentSize,TotalSize,FileSize,
+			       string("Reading ") + Type() + " Indexes");
+
+      // Parse
+      Progress.SubProgress(Pkg.Size());
+      pkgTagSection Section;
+      this->Section = &Section;
+      string Prefix;
+      unsigned long Hits = 0;
+      unsigned long Chop = 0;
+      while (Parser.Step(Section) == true)
+      {
+	 Progress.Progress(Parser.Offset());
+	 string File;
+	 unsigned long Size;
+	 if (GetFile(File,Size) == false)
+	    return false;
+	 
+	 if (Chop != 0)
+	    File = OrigPath + ChopDirs(File,Chop);
+	 
+	 // See if the file exists
+	 bool Mangled = false;
+	 if (NoStat == false || Hits < 10)
+	 {
+	    // Attempt to fix broken structure
+	    if (Hits == 0)
+	    {
+	       if (ReconstructPrefix(Prefix,OrigPath,CDROM,File) == false &&
+		   ReconstructChop(Chop,*I,File) == false)
+	       {
+		  if (Debug == true)
+		     clog << "Missed: " << File << endl;
+		  NotFound++;
+		  continue;
+	       }
+	       if (Chop != 0)
+		  File = OrigPath + ChopDirs(File,Chop);
+	    }
+	    
+	    // Get the size
+	    struct stat Buf;
+	    if (stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0 || 
+		Buf.st_size == 0)
+	    {
+	       // Attempt to fix busted symlink support for one instance
+	       string OrigFile = File;
+	       string::size_type Start = File.find("binary-");
+	       string::size_type End = File.find("/",Start+3);
+	       if (Start != string::npos && End != string::npos)
+	       {
+		  File.replace(Start,End-Start,"binary-all");
+		  Mangled = true;
+	       }
+	       
+	       if (Mangled == false ||
+		   stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0)
+	       {
+		  if (Debug == true)
+		     clog << "Missed(2): " << OrigFile << endl;
+		  NotFound++;
+		  continue;
+	       }	       
+	    }	    
+	    			    	    
+	    // Size match
+	    if ((unsigned)Buf.st_size != Size)
+	    {
+	       if (Debug == true)
+		  clog << "Wrong Size: " << File << endl;
+	       WrongSize++;
+	       continue;
+	    }
+	 }
+	 
+	 Packages++;
+	 Hits++;
+	 
+	 // Copy it to the target package file
+	 if (Chop != 0 || Mangled == true)
+	 {
+	    if (RewriteEntry(Target,File) == false)
+	       continue;
+	 }
+	 else
+	 {
+	    const char *Start;
+	    const char *Stop;
+	    Section.GetSection(Start,Stop);
+	    if (Target.Write(Start,Stop-Start) == false)
+	       return false;
+	 }	 
+      }
+
+      if (Debug == true)
+	 cout << " Processed by using Prefix '" << Prefix << "' and chop " << Chop << endl;
+	 
+      if (_config->FindB("APT::CDROM::NoAct",false) == false)
+      {
+	 // Move out of the partial directory
+	 Target.Close();
+	 string FinalF = _config->FindDir("Dir::State::lists");
+	 FinalF += URItoFileName(S);
+	 if (rename(TargetF.c_str(),FinalF.c_str()) != 0)
+	    return _error->Errno("rename","Failed to rename");
+
+	 // Copy the release file
+	 sprintf(S,"cdrom:%s/%sRelease",Name.c_str(),(*I).c_str() + CDROM.length());
+	 string TargetF = _config->FindDir("Dir::State::lists") + "partial/";
+	 TargetF += URItoFileName(S);
+	 if (FileExists(*I + "Release") == true)
+	 {
+	    FileFd Target(TargetF,FileFd::WriteEmpty);
+	    FileFd Rel(*I + "Release",FileFd::ReadOnly);
+	    if (_error->PendingError() == true)
+	       return false;
+	    
+	    if (CopyFile(Rel,Target) == false)
+	       return false;
+	 }
+	 else
+	 {
+	    // Empty release file
+	    FileFd Target(TargetF,FileFd::WriteEmpty);	    
+	 }	 
+
+	 // Rename the release file
+	 FinalF = _config->FindDir("Dir::State::lists");
+	 FinalF += URItoFileName(S);
+	 if (rename(TargetF.c_str(),FinalF.c_str()) != 0)
+	    return _error->Errno("rename","Failed to rename");
+      }
+      
+      /* Mangle the source to be in the proper notation with
+       	 prefix dist [component] */ 
+      *I = string(*I,Prefix.length());
+      ConvertToSourceList(CDROM,*I);
+      *I = Prefix + ' ' + *I;
+      
+      CurrentSize += FileSize;
+   }   
+   Progress.Done();
+   
+   // Some stats
+   cout << "Wrote " << Packages << " records" ;
+   if (NotFound != 0)
+      cout << " with " << NotFound << " missing files";
+   if (NotFound != 0 && WrongSize != 0)
+      cout << " and"; 
+   if (WrongSize != 0)
+      cout << " with " << WrongSize << " mismatched files";
+   cout << '.' << endl;
+   
+   if (Packages == 0)
+      return _error->Error("No valid records were found.");
+   
+   if (NotFound + WrongSize > 10)
+      cout << "Alot of entries were discarded, something may be wrong." << endl;
+
+   return true;
+}
+									/*}}}*/
+// IndexCopy::ChopDirs - Chop off the leading directory components	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+string IndexCopy::ChopDirs(string Path,unsigned int Depth)
+{
+   string::size_type I = 0;
+   do
+   {
+      I = Path.find('/',I+1);
+      Depth--;
+   }
+   while (I != string::npos && Depth != 0);
+   
+   if (I == string::npos)
+      return string();
+   
+   return string(Path,I+1);
+}
+									/*}}}*/
+// IndexCopy::ReconstructPrefix - Fix strange prefixing			/*{{{*/
+// ---------------------------------------------------------------------
+/* This prepends dir components from the path to the package files to
+   the path to the deb until it is found */
+bool IndexCopy::ReconstructPrefix(string &Prefix,string OrigPath,string CD,
+				  string File)
+{
+   bool Debug = _config->FindB("Debug::aptcdrom",false);
+   unsigned int Depth = 1;
+   string MyPrefix = Prefix;
+   while (1)
+   {
+      struct stat Buf;
+      if (stat(string(CD + MyPrefix + File).c_str(),&Buf) != 0)
+      {
+	 if (Debug == true)
+	    cout << "Failed, " << CD + MyPrefix + File << endl;
+	 if (GrabFirst(OrigPath,MyPrefix,Depth++) == true)
+	    continue;
+	 
+	 return false;
+      }
+      else
+      {
+	 Prefix = MyPrefix;
+	 return true;
+      }      
+   }
+   return false;
+}
+									/*}}}*/
+// IndexCopy::ReconstructChop - Fixes bad source paths			/*{{{*/
+// ---------------------------------------------------------------------
+/* This removes path components from the filename and prepends the location
+   of the package files until a file is found */
+bool IndexCopy::ReconstructChop(unsigned long &Chop,string Dir,string File)
+{
+   // Attempt to reconstruct the filename
+   unsigned long Depth = 0;
+   while (1)
+   {
+      struct stat Buf;
+      if (stat(string(Dir + File).c_str(),&Buf) != 0)
+      {
+	 File = ChopDirs(File,1);
+	 Depth++;
+	 if (File.empty() == false)
+	    continue;
+	 return false;
+      }
+      else
+      {
+	 Chop = Depth;
+	 return true;
+      }
+   }
+   return false;
+}
+									/*}}}*/
+// IndexCopy::ConvertToSourceList - Convert a Path to a sourcelist 	/*{{{*/
+// ---------------------------------------------------------------------
+/* We look for things in dists/ notation and convert them to 
+   <dist> <component> form otherwise it is left alone. This also strips
+   the CD path. */
+void IndexCopy::ConvertToSourceList(string CD,string &Path)
+{
+   char S[300];
+   sprintf(S,"binary-%s",_config->Find("Apt::Architecture").c_str());
+   
+   // Strip the cdrom base path
+   Path = string(Path,CD.length());
+   if (Path.empty() == true)
+      Path = "/";
+   
+   // Too short to be a dists/ type
+   if (Path.length() < strlen("dists/"))
+      return;
+   
+   // Not a dists type.
+   if (stringcmp(Path.begin(),Path.begin()+strlen("dists/"),"dists/") != 0)
+      return;
+
+   // Isolate the dist
+   string::size_type Slash = strlen("dists/");
+   string::size_type Slash2 = Path.find('/',Slash + 1);
+   if (Slash2 == string::npos || Slash2 + 2 >= Path.length())
+      return;
+   string Dist = string(Path,Slash,Slash2 - Slash);
+   
+   // Isolate the component
+   Slash = Path.find('/',Slash2+1);
+   if (Slash == string::npos || Slash + 2 >= Path.length())
+      return;
+   string Comp = string(Path,Slash2+1,Slash - Slash2-1);
+   
+   // Verify the trailing binar - bit
+   Slash2 = Path.find('/',Slash + 1);
+   if (Slash == string::npos)
+      return;
+   string Binary = string(Path,Slash+1,Slash2 - Slash-1);
+   
+   if (Binary != S && Binary != "source")
+      return;
+   
+   Path = Dist + ' ' + Comp;
+}
+									/*}}}*/
+// IndexCopy::GrabFirst - Return the first Depth path components	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool IndexCopy::GrabFirst(string Path,string &To,unsigned int Depth)
+{
+   string::size_type I = 0;
+   do
+   {
+      I = Path.find('/',I+1);
+      Depth--;
+   }
+   while (I != string::npos && Depth != 0);
+   
+   if (I == string::npos)
+      return false;
+
+   To = string(Path,0,I+1);
+   return true;
+}
+									/*}}}*/
+// IndexCopy::CopyWithReplace - Copy a section and replace text		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool IndexCopy::CopyWithReplace(FileFd &Target,const char *Tag,string New)
+{
+   // Mangle the output filename
+   const char *Start;
+   const char *Stop;
+   const char *Filename;
+   Section->Find(Tag,Filename,Stop);
+   
+   /* We need to rewrite the filename field so we emit
+      all fields except the filename file and rewrite that one */
+   for (unsigned int I = 0; I != Section->Count(); I++)
+   {
+      Section->Get(Start,Stop,I);
+      if (Start <= Filename && Stop > Filename)
+      {
+	 char S[500];
+	 sprintf(S,"%s: %s\n",Tag,New.c_str());
+	 if (I + 1 == Section->Count())
+	    strcat(S,"\n");
+	 if (Target.Write(S,strlen(S)) == false)
+	    return false;
+      }
+      else
+      {
+	 if (Target.Write(Start,Stop-Start) == false)
+	    return false;
+	 if (Stop[-1] != '\n')
+	    if (Target.Write("\n",1) == false)
+	       return false;
+      }	       
+   }
+   if (Target.Write("\n",1) == false)
+      return false;
+}
+									/*}}}*/
+// PackageCopy::GetFile - Get the file information from the section	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool PackageCopy::GetFile(string &File,unsigned long &Size)
+{
+   File = Section->FindS("Filename");
+   Size = Section->FindI("Size");
+   if (File.empty() || Size == 0)
+      return _error->Error("Cannot find filename or size tag");
+   return true;
+}
+									/*}}}*/
+// PackageCopy::RewriteEntry - Rewrite the entry with a new filename	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool PackageCopy::RewriteEntry(FileFd &Target,string File)
+{
+   return CopyWithReplace(Target,"Filename",File);
+}
+									/*}}}*/
+// SourceCopy::GetFile - Get the file information from the section	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SourceCopy::GetFile(string &File,unsigned long &Size)
+{
+   string Files = Section->FindS("Files");
+   if (Files.empty() == true)
+      return false;
+
+   // Stash the / terminated directory prefix
+   string Base = Section->FindS("Directory");
+   if (Base.empty() == false && Base[Base.length()-1] != '/')
+      Base += '/';
+   
+   // Iterate over the entire list grabbing each triplet
+   const char *C = Files.c_str();
+   string sSize;
+   string MD5Hash;
+   
+   // Parse each of the elements
+   if (ParseQuoteWord(C,MD5Hash) == false ||
+       ParseQuoteWord(C,sSize) == false ||
+       ParseQuoteWord(C,File) == false)
+      return _error->Error("Error parsing file record");
+   
+   // Parse the size and append the directory
+   Size = atoi(sSize.c_str());
+   File = Base + File;
+   return true;
+}
+									/*}}}*/
+// SourceCopy::RewriteEntry - Rewrite the entry with a new filename	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SourceCopy::RewriteEntry(FileFd &Target,string File)
+{
+   return CopyWithReplace(Target,"Directory",
+			  string(File,0,File.rfind('/')));
+}
+									/*}}}*/