don't explicitly init ExtractTar InFd with invalid fd

[ntk/apt.git] / apt-inst / contrib / extracttar.cc

diff --git a/apt-inst/contrib/extracttar.cc b/apt-inst/contrib/extracttar.cc
index 2585986..49ed5db 100644 (file)
--- a/apt-inst/contrib/extracttar.cc
+++ b/apt-inst/contrib/extracttar.cc
@@ -16,21 +16,21 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/extracttar.h"
-#endif
-#include <apt-pkg/extracttar.h>
+#include<config.h>
 
+#include <apt-pkg/dirstream.h>
+#include <apt-pkg/extracttar.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>
-#include <system.h>
+#include <apt-pkg/macros.h>
 
 #include <stdlib.h>
 #include <unistd.h>
 #include <signal.h>
 #include <fcntl.h>
 #include <iostream>
+
 #include <apti18n.h>
                                                                        /*}}}*/
 
@@ -63,7 +63,6 @@ ExtractTar::ExtractTar(FileFd &Fd,unsigned long Max,string DecompressionProgram)
 
 {
    GZPid = -1;
-   InFd = -1;
    Eof = false;
 }
                                                                        /*}}}*/
@@ -136,7 +135,8 @@ bool ExtractTar::StartGzip()
       
       const char *Args[3];
       string confvar = string("dir::bin::") + DecompressProg;
-      Args[0] = _config->Find(confvar.c_str(),DecompressProg.c_str()).c_str();
+      string argv0 = _config->Find(confvar.c_str(),DecompressProg.c_str());
+      Args[0] = argv0.c_str();
       Args[1] = "-d";
       Args[2] = 0;
       execvp(Args[0],(char **)Args);
@@ -145,7 +145,7 @@ bool ExtractTar::StartGzip()
    }
 
    // Fix up our FDs
-   InFd.Fd(Pipes[0]);
+   InFd.OpenDescriptor(Pipes[0], FileFd::ReadOnly, FileFd::None, true);
    close(Pipes[1]);
    return true;
 }
@@ -197,10 +197,14 @@ bool ExtractTar::Go(pkgDirStream &Stream)
       // Decode all of the fields
       pkgDirStream::Item Itm;
       if (StrToNum(Tar->Mode,Itm.Mode,sizeof(Tar->Mode),8) == false ||
-         StrToNum(Tar->UserID,Itm.UID,sizeof(Tar->UserID),8) == false ||
-         StrToNum(Tar->GroupID,Itm.GID,sizeof(Tar->GroupID),8) == false ||
-         StrToNum(Tar->Size,Itm.Size,sizeof(Tar->Size),8) == false ||
-         StrToNum(Tar->MTime,Itm.MTime,sizeof(Tar->MTime),8) == false ||
+          (Base256ToNum(Tar->UserID,Itm.UID,8) == false &&
+            StrToNum(Tar->UserID,Itm.UID,sizeof(Tar->UserID),8) == false) ||
+          (Base256ToNum(Tar->GroupID,Itm.GID,8) == false &&
+            StrToNum(Tar->GroupID,Itm.GID,sizeof(Tar->GroupID),8) == false) ||
+          (Base256ToNum(Tar->Size,Itm.Size,12) == false &&
+            StrToNum(Tar->Size,Itm.Size,sizeof(Tar->Size),8) == false) ||
+          (Base256ToNum(Tar->MTime,Itm.MTime,12) == false &&
+            StrToNum(Tar->MTime,Itm.MTime,sizeof(Tar->MTime),8) == false) ||
          StrToNum(Tar->Major,Itm.Major,sizeof(Tar->Major),8) == false ||
          StrToNum(Tar->Minor,Itm.Minor,sizeof(Tar->Minor),8) == false)
         return _error->Error(_("Corrupted archive"));
@@ -210,14 +214,14 @@ bool ExtractTar::Go(pkgDirStream &Stream)
         Itm.Name = (char *)LastLongName.c_str();
       else
       {
-        Tar->Name[sizeof(Tar->Name)] = 0;
+        Tar->Name[sizeof(Tar->Name)-1] = 0;
         Itm.Name = Tar->Name;
       }      
       if (Itm.Name[0] == '.' && Itm.Name[1] == '/' && Itm.Name[2] != 0)
         Itm.Name += 2;
       
       // Grab the link target
-      Tar->Name[sizeof(Tar->LinkName)] = 0;
+      Tar->Name[sizeof(Tar->LinkName)-1] = 0;
       Itm.LinkTarget = Tar->LinkName;
 
       if (LastLongLink.empty() == false)
@@ -309,7 +313,7 @@ bool ExtractTar::Go(pkgDirStream &Stream)
       while (Size != 0)
       {
         unsigned char Junk[32*1024];
-        unsigned long Read = MIN(Size,sizeof(Junk));
+        unsigned long Read = min(Size,(unsigned long)sizeof(Junk));
         if (InFd.Read(Junk,((Read+511)/512)*512) == false)
            return false;
         
@@ -334,7 +338,7 @@ bool ExtractTar::Go(pkgDirStream &Stream)
       }
       
       // And finish up
-      if (Itm.Size != 0 && BadRecord == false)
+      if (BadRecord == false)
         if (Stream.FinishedFile(Itm,Fd) == false)
            return false;