Merge remote-tracking branch 'donkult/debian/experimental' into debian/experimental

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

diff --git a/apt-inst/contrib/extracttar.cc b/apt-inst/contrib/extracttar.cc
index 1a358d57e6fb34280edef6136d74d1738a088ccd..be0b69d96e66bfc0a1acad0668bfdcbd9cdc01f3 100644 (file)
--- a/apt-inst/contrib/extracttar.cc
+++ b/apt-inst/contrib/extracttar.cc
@@ -6,7 +6,7 @@
    Extract a Tar - Tar Extractor
 
    Some performance measurements showed that zlib performed quite poorly
    Extract a Tar - Tar Extractor
 
    Some performance measurements showed that zlib performed quite poorly

-   in comparision to a forked gzip process. This tar extractor makes use
+   in comparison to a forked gzip process. This tar extractor makes use

    of the fact that dup'd file descriptors have the same seek pointer
    and that gzip will not read past the end of a compressed stream, 
    even if there is more data. We use the dup property to track extraction
    of the fact that dup'd file descriptors have the same seek pointer
    and that gzip will not read past the end of a compressed stream, 
    even if there is more data. We use the dup property to track extraction


@@ -16,18 +16,23 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#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 <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/configuration.h>

-#include <apt-pkg/macros.h>
+#include <apt-pkg/fileutl.h>

 
 

-#include <stdlib.h>
+#include <string.h>
+#include <algorithm>
+#include <string>

 #include <unistd.h>
 #include <signal.h>
 #include <fcntl.h>
 #include <iostream>
 #include <unistd.h>
 #include <signal.h>
 #include <fcntl.h>
 #include <iostream>

+

 #include <apti18n.h>
                                                                        /*}}}*/
 
 #include <apti18n.h>
                                                                        /*}}}*/
 


@@ -55,12 +60,15 @@ struct ExtractTar::TarHeader
 // ExtractTar::ExtractTar - Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // ExtractTar::ExtractTar - Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-ExtractTar::ExtractTar(FileFd &Fd,unsigned long Max,string DecompressionProgram) : File(Fd), 
-                         MaxInSize(Max), DecompressProg(DecompressionProgram)
-
+#if APT_PKG_ABI >= 413
+ExtractTar::ExtractTar(FileFd &Fd,unsigned long long Max,string DecompressionProgram)
+       : File(Fd), MaxInSize(Max), DecompressProg(DecompressionProgram)
+#else
+ExtractTar::ExtractTar(FileFd &Fd,unsigned long Max,string DecompressionProgram)
+       : File(Fd), MaxInSize(Max), DecompressProg(DecompressionProgram)
+#endif

 {
    GZPid = -1;
 {
    GZPid = -1;

-   InFd = -1;

    Eof = false;
 }
                                                                        /*}}}*/
    Eof = false;
 }
                                                                        /*}}}*/


@@ -109,10 +117,16 @@ bool ExtractTar::Done(bool Force)
    gzip will efficiently ignore the extra bits. */
 bool ExtractTar::StartGzip()
 {
    gzip will efficiently ignore the extra bits. */
 bool ExtractTar::StartGzip()
 {

+   if (DecompressProg.empty())
+   {
+      InFd.OpenDescriptor(File.Fd(), FileFd::ReadOnly, FileFd::None, false);
+      return true;
+   }
+

    int Pipes[2];
    if (pipe(Pipes) != 0)
       return _error->Errno("pipe",_("Failed to create pipes"));
    int Pipes[2];
    if (pipe(Pipes) != 0)
       return _error->Errno("pipe",_("Failed to create pipes"));

-   
+

    // Fork off the process
    GZPid = ExecFork();
 
    // Fork off the process
    GZPid = ExecFork();
 


@@ -128,9 +142,9 @@ bool ExtractTar::StartGzip()
       dup2(Fd,STDERR_FILENO);
       close(Fd);
       SetCloseExec(STDOUT_FILENO,false);
       dup2(Fd,STDERR_FILENO);
       close(Fd);
       SetCloseExec(STDOUT_FILENO,false);

-      SetCloseExec(STDIN_FILENO,false);      
+      SetCloseExec(STDIN_FILENO,false);

       SetCloseExec(STDERR_FILENO,false);
       SetCloseExec(STDERR_FILENO,false);

-      
+

       const char *Args[3];
       string confvar = string("dir::bin::") + DecompressProg;
       string argv0 = _config->Find(confvar.c_str(),DecompressProg.c_str());
       const char *Args[3];
       string confvar = string("dir::bin::") + DecompressProg;
       string argv0 = _config->Find(confvar.c_str(),DecompressProg.c_str());


@@ -143,7 +157,7 @@ bool ExtractTar::StartGzip()
    }
 
    // Fix up our FDs
    }
 
    // Fix up our FDs

-   InFd.Fd(Pipes[0]);
+   InFd.OpenDescriptor(Pipes[0], FileFd::ReadOnly, FileFd::None, true);

    close(Pipes[1]);
    return true;
 }
    close(Pipes[1]);
    return true;
 }


@@ -159,8 +173,8 @@ bool ExtractTar::Go(pkgDirStream &Stream)
       return false;
    
    // Loop over all blocks
       return false;
    
    // Loop over all blocks

-   string LastLongLink;
-   string LastLongName;
+   string LastLongLink, ItemLink;
+   string LastLongName, ItemName;

    while (1)
    {
       bool BadRecord = false;      
    while (1)
    {
       bool BadRecord = false;      


@@ -206,25 +220,23 @@ bool ExtractTar::Go(pkgDirStream &Stream)
          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"));
          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"));

-      
-      // Grab the filename
+
+      // Grab the filename and link target: use last long name if one was
+      // set, otherwise use the header value as-is, but remember that it may
+      // fill the entire 100-byte block and needs to be zero-terminated.
+      // See Debian Bug #689582.

       if (LastLongName.empty() == false)
         Itm.Name = (char *)LastLongName.c_str();
       else
       if (LastLongName.empty() == false)
         Itm.Name = (char *)LastLongName.c_str();
       else

-      {
-        Tar->Name[sizeof(Tar->Name)-1] = 0;
-        Itm.Name = Tar->Name;
-      }      
+        Itm.Name = (char *)ItemName.assign(Tar->Name, sizeof(Tar->Name)).c_str();

       if (Itm.Name[0] == '.' && Itm.Name[1] == '/' && Itm.Name[2] != 0)
         Itm.Name += 2;
       if (Itm.Name[0] == '.' && Itm.Name[1] == '/' && Itm.Name[2] != 0)
         Itm.Name += 2;

-      
-      // Grab the link target
-      Tar->Name[sizeof(Tar->LinkName)-1] = 0;
-      Itm.LinkTarget = Tar->LinkName;

 
       if (LastLongLink.empty() == false)
         Itm.LinkTarget = (char *)LastLongLink.c_str();
 
       if (LastLongLink.empty() == false)
         Itm.LinkTarget = (char *)LastLongLink.c_str();

-      
+      else
+        Itm.LinkTarget = (char *)ItemLink.assign(Tar->LinkName, sizeof(Tar->LinkName)).c_str();
+

       // Convert the type over
       switch (Tar->LinkFlag)
       {
       // Convert the type over
       switch (Tar->LinkFlag)
       {


@@ -259,7 +271,7 @@ bool ExtractTar::Go(pkgDirStream &Stream)
 
         case GNU_LongLink:
         {
 
         case GNU_LongLink:
         {

-           unsigned long Length = Itm.Size;
+           unsigned long long Length = Itm.Size;

            unsigned char Block[512];
            while (Length > 0)
            {
            unsigned char Block[512];
            while (Length > 0)
            {


@@ -278,7 +290,7 @@ bool ExtractTar::Go(pkgDirStream &Stream)
         
         case GNU_LongName:
         {
         
         case GNU_LongName:
         {

-           unsigned long Length = Itm.Size;
+           unsigned long long Length = Itm.Size;

            unsigned char Block[512];
            while (Length > 0)
            {
            unsigned char Block[512];
            while (Length > 0)
            {


@@ -307,11 +319,11 @@ bool ExtractTar::Go(pkgDirStream &Stream)
            return false;
       
       // Copy the file over the FD
            return false;
       
       // Copy the file over the FD

-      unsigned long Size = Itm.Size;
+      unsigned long long Size = Itm.Size;

       while (Size != 0)
       {
         unsigned char Junk[32*1024];
       while (Size != 0)
       {
         unsigned char Junk[32*1024];

-        unsigned long Read = min(Size,(unsigned long)sizeof(Junk));
+        unsigned long Read = min(Size, (unsigned long long)sizeof(Junk));

         if (InFd.Read(Junk,((Read+511)/512)*512) == false)
            return false;
         
         if (InFd.Read(Junk,((Read+511)/512)*512) == false)
            return false;
         


@@ -336,7 +348,7 @@ bool ExtractTar::Go(pkgDirStream &Stream)
       }
       
       // And finish up
       }
       
       // And finish up

-      if (Itm.Size >= 0 && BadRecord == false)
+      if (BadRecord == false)

         if (Stream.FinishedFile(Itm,Fd) == false)
            return false;
       
         if (Stream.FinishedFile(Itm,Fd) == false)
            return false;