From 2f6a2fbbdc9f76dc4eace83a427013f4e1c03afc Mon Sep 17 00:00:00 2001
From: David Kalnischkies <david@kalnischkies.de>
Date: Thu, 8 Jan 2015 21:07:37 +0100
Subject: properly implement pkgRecord::Parser for *.deb files

Implementing FileName() works for most cases for us, but other
frontends might need more and even for us its not very stable as
the normal Jump() implementation is pretty bad on a deb file and
produce errors on its own at times.
So, replacing this makeshift with a complete implementation by
mostly just shuffling code around.
---
 apt-pkg/deb/debindexfile.cc | 73 +++++++++++++++++++++++----------------------
 1 file changed, 38 insertions(+), 35 deletions(-)

(limited to 'apt-pkg/deb/debindexfile.cc')

diff --git a/apt-pkg/deb/debindexfile.cc b/apt-pkg/deb/debindexfile.cc
index cecfe41a9..49c6e8cc0 100644
--- a/apt-pkg/deb/debindexfile.cc
+++ b/apt-pkg/deb/debindexfile.cc
@@ -34,6 +34,7 @@
 
 #include <stdio.h>
 #include <iostream>
+#include <sstream>
 #include <string>
 #include <sys/stat.h>
 									/*}}}*/
@@ -671,8 +672,7 @@ APT_CONST bool debStatusIndex::Exists() const
 }
 									/*}}}*/
 
-// debDebPkgFile - Single .deb file                           		/*{{{*/
-// ---------------------------------------------------------------------
+// debDebPkgFile - Single .deb file					/*{{{*/
 debDebPkgFileIndex::debDebPkgFileIndex(std::string DebFile)
    : pkgIndexFile(true), DebFile(DebFile)
 {
@@ -688,53 +688,56 @@ bool debDebPkgFileIndex::Exists() const
 {
    return FileExists(DebFile);
 }
-bool debDebPkgFileIndex::Merge(pkgCacheGenerator& Gen, OpProgress* Prog) const
+bool debDebPkgFileIndex::GetContent(std::ostream &content, std::string const &debfile)
 {
-   if(Prog)
-      Prog->SubProgress(0, "Reading deb file");
-
-   // get the control data out of the deb file vid dpkg -I
-   // ... can I haz libdpkg?
-   Configuration::Item const *Opts = _config->Tree("DPkg::Options");
-   std::string dpkg = _config->Find("Dir::Bin::dpkg","dpkg");
+   // get the control data out of the deb file via dpkg-deb -I
+   std::string dpkg = _config->Find("Dir::Bin::dpkg","dpkg-deb");
    std::vector<const char *> Args;
    Args.push_back(dpkg.c_str());
-   if (Opts != 0)
-   {
-      Opts = Opts->Child;
-      for (; Opts != 0; Opts = Opts->Next)
-      {
-	 if (Opts->Value.empty() == true)
-	    continue;
-	 Args.push_back(Opts->Value.c_str());
-      }
-   }
    Args.push_back("-I");
-   Args.push_back(DebFile.c_str());
+   Args.push_back(debfile.c_str());
    Args.push_back("control");
    Args.push_back(NULL);
    FileFd PipeFd;
    pid_t Child;
    if(Popen((const char**)&Args[0], PipeFd, Child, FileFd::ReadOnly) == false)
       return _error->Error("Popen failed");
-   // FIXME: static buffer
-   char buf[8*1024];
-   unsigned long long n = 0;
-   if(PipeFd.Read(buf, sizeof(buf)-1, &n) == false)
-      return _error->Errno("read", "Failed to read dpkg pipe");
+
+   char buffer[1024];
+   do {
+      unsigned long long actual = 0;
+      if (PipeFd.Read(buffer, sizeof(buffer)-1, &actual) == false)
+	 return _error->Errno("read", "Failed to read dpkg pipe");
+      if (actual == 0)
+	 break;
+      buffer[actual] = '\0';
+      content << buffer;
+   } while(true);
    ExecWait(Child, "Popen");
 
-   // now write the control data to a tempfile
+   content << "Filename: " << debfile << "\n";
+   struct stat Buf;
+   if (stat(debfile.c_str(), &Buf) != 0)
+      return false;
+   content << "Size: " << Buf.st_size << "\n";
+
+   return true;
+}
+bool debDebPkgFileIndex::Merge(pkgCacheGenerator& Gen, OpProgress* Prog) const
+{
+   if(Prog)
+      Prog->SubProgress(0, "Reading deb file");
+
+   // write the control data to a tempfile
    SPtr<FileFd> DebControl = GetTempFile("deb-file-" + flNotDir(DebFile));
    if(DebControl == NULL)
       return false;
-   DebControl->Write(buf, n);
-   // append size of the file
-   FileFd Fd(DebFile, FileFd::ReadOnly);
-   string Size;
-   strprintf(Size, "Size: %llu\n", Fd.Size());
-   DebControl->Write(Size.c_str(), Size.size());
-   // and rewind for the listparser
+   std::ostringstream content;
+   if (GetContent(content, DebFile) == false)
+      return false;
+   std::string const contentstr = content.str();
+   DebControl->Write(contentstr.c_str(), contentstr.length());
+   // rewind for the listparser
    DebControl->Seek(0);
 
    // and give it to the list parser
@@ -838,7 +841,7 @@ class APT_HIDDEN debIFTypeDebPkgFile : public pkgIndexFile::Type
    public:
    virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator File) const 
    {
-      return new debDebFileRecordParser(File.FileName(),*File.Cache());
+      return new debDebFileRecordParser(File.FileName());
    };
    debIFTypeDebPkgFile() {Label = "deb Package file";};
 };
-- 
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