all errors should be printed to stderr

[apt.git] / methods / gzip.cc

diff --git a/methods/gzip.cc b/methods/gzip.cc
index c0092c7550ace7523f1f9c10a5d14cd2a429e9bb..7ffcda60f66cace2b11fceaad4cbbeb6521fa346 100644 (file)
--- a/methods/gzip.cc
+++ b/methods/gzip.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: gzip.cc,v 1.13 2001/03/11 05:30:20 jgg Exp $
+// $Id: gzip.cc,v 1.17.2.1 2004/01/16 18:58:50 mdz Exp $

 /* ######################################################################
 
    GZip method - Take a file URI in and decompress it into the target 
 /* ######################################################################
 
    GZip method - Take a file URI in and decompress it into the target 


@@ -9,19 +9,27 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#include <apt-pkg/fileutl.h>
-#include <apt-pkg/error.h>
+#include <config.h>
+
+#include <apt-pkg/configuration.h>

 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/acquire-method.h>

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

 #include <apt-pkg/hashes.h>
 #include <apt-pkg/hashes.h>

+#include <apt-pkg/strutl.h>
+#include <apt-pkg/aptconfiguration.h>

 
 

+#include <string.h>

 #include <sys/stat.h>
 #include <sys/stat.h>

-#include <unistd.h>
-#include <utime.h>
-#include <stdio.h>
-#include <errno.h>
+#include <sys/time.h>
+#include <string>
+#include <vector>
+
+#include <apti18n.h>

                                                                        /*}}}*/
 
                                                                        /*}}}*/
 

+const char *Prog;
+

 class GzipMethod : public pkgAcqMethod
 {
    virtual bool Fetch(FetchItem *Itm);
 class GzipMethod : public pkgAcqMethod
 {
    virtual bool Fetch(FetchItem *Itm);


@@ -34,121 +42,105 @@ class GzipMethod : public pkgAcqMethod
 
 // GzipMethod::Fetch - Decompress the passed URI                       /*{{{*/
 // ---------------------------------------------------------------------
 
 // GzipMethod::Fetch - Decompress the passed URI                       /*{{{*/
 // ---------------------------------------------------------------------

-/* This forks gzip and hashes the resulting decompressed output as it
-   flows to the destination file */
+/* */

 bool GzipMethod::Fetch(FetchItem *Itm)
 {
    URI Get = Itm->Uri;
 bool GzipMethod::Fetch(FetchItem *Itm)
 {
    URI Get = Itm->Uri;

-   string Path = Get.Host + Get.Path; // To account for relative paths
+   std::string Path = Get.Host + Get.Path; // To account for relative paths

    
    FetchResult Res;
    Res.Filename = Itm->DestFile;
    URIStart(Res);
    
    FetchResult Res;
    Res.Filename = Itm->DestFile;
    URIStart(Res);

-   
-   // Open the source and destination files
-   FileFd From(Path,FileFd::ReadOnly);

 
 

-   int GzOut[2];   
-   if (pipe(GzOut) < 0)
-      return _error->Errno("pipe","Couldn't open pipe for gzip");
+   std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
+   std::vector<APT::Configuration::Compressor>::const_iterator compressor = compressors.begin();
+   for (; compressor != compressors.end(); ++compressor)
+      if (compressor->Name == Prog)
+        break;
+   if (compressor == compressors.end())
+      return _error->Error("Extraction of file %s requires unknown compressor %s", Path.c_str(), Prog);

 
 

-   // Fork gzip
-   int Process = ExecFork();
-   if (Process == 0)
+   // Open the source and destination files
+   FileFd From, To;
+   if (_config->FindB("Method::Compress", false) == false)

    {
    {

-      close(GzOut[0]);
-      dup2(From.Fd(),STDIN_FILENO);
-      dup2(GzOut[1],STDOUT_FILENO);
-      From.Close();
-      close(GzOut[1]);
-      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);
+      From.Open(Path, FileFd::ReadOnly, *compressor);
+      if(From.FileSize() == 0)
+        return _error->Error(_("Empty files can't be valid archives"));
+      To.Open(Itm->DestFile, FileFd::WriteAtomic);
+   }
+   else
+   {
+      From.Open(Path, FileFd::ReadOnly);
+      To.Open(Itm->DestFile, FileFd::WriteOnly | FileFd::Create | FileFd::Empty, *compressor);

    }
    }

-   From.Close();
-   close(GzOut[1]);
-   
-   FileFd FromGz(GzOut[0]);  // For autoclose   
-   FileFd To(Itm->DestFile,FileFd::WriteEmpty);   

    To.EraseOnFailure();
    To.EraseOnFailure();

-   if (_error->PendingError() == true)
+
+   if (From.IsOpen() == false || From.Failed() == true ||
+        To.IsOpen() == false || To.Failed() == true)

       return false;
       return false;

-   
-   // Read data from gzip, generate checksums and write
+
+   // Read data from source, generate checksums and write

    Hashes Hash;
    bool Failed = false;
    while (1) 
    {
       unsigned char Buffer[4*1024];
    Hashes Hash;
    bool Failed = false;
    while (1) 
    {
       unsigned char Buffer[4*1024];

-      unsigned long Count;
+      unsigned long long Count = 0;

       
       

-      Count = read(GzOut[0],Buffer,sizeof(Buffer));
-      if (Count < 0 && errno == EINTR)
-        continue;
-      
-      if (Count < 0)
+      if (!From.Read(Buffer,sizeof(Buffer),&Count))

       {
       {

-        _error->Errno("read", "Read error from gzip process");
-        Failed = true;
-        break;
+        To.OpFail();
+        return false;

       }
       }

-      

       if (Count == 0)
         break;
       if (Count == 0)
         break;

-      
+

       Hash.Add(Buffer,Count);
       if (To.Write(Buffer,Count) == false)
       Hash.Add(Buffer,Count);
       if (To.Write(Buffer,Count) == false)

-      {         
+      {

         Failed = true;
         break;
         Failed = true;
         break;

-      }         
+      }      

    }
    
    }
    

-   // Wait for gzip to finish
-   if (ExecWait(Process,_config->Find("Dir::bin::gzip","gzip").c_str(),false) == false)
-   {
-      To.OpFail();
-      return false;
-   }  
-       
+   From.Close();
+   Res.Size = To.FileSize();

    To.Close();
    To.Close();

-   
+

    if (Failed == true)
       return false;
    if (Failed == true)
       return false;

-   
+

    // Transfer the modification times
    struct stat Buf;
    if (stat(Path.c_str(),&Buf) != 0)
    // Transfer the modification times
    struct stat Buf;
    if (stat(Path.c_str(),&Buf) != 0)

-      return _error->Errno("stat","Failed to stat");
+      return _error->Errno("stat",_("Failed to stat"));

 
 

-   struct utimbuf TimeBuf;
-   TimeBuf.actime = Buf.st_atime;
-   TimeBuf.modtime = Buf.st_mtime;
-   if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
-      return _error->Errno("utime","Failed to set modification time");
+   struct timeval times[2];
+   times[0].tv_sec = Buf.st_atime;
+   Res.LastModified = times[1].tv_sec = Buf.st_mtime;
+   times[0].tv_usec = times[1].tv_usec = 0;
+   if (utimes(Itm->DestFile.c_str(), times) != 0)
+      return _error->Errno("utimes",_("Failed to set modification time"));

 
 

-   if (stat(Itm->DestFile.c_str(),&Buf) != 0)
-      return _error->Errno("stat","Failed to stat");
-   

    // Return a Done response
    // Return a Done response

-   Res.LastModified = Buf.st_mtime;
-   Res.Size = Buf.st_size;
-   Res.MD5Sum = Hash.MD5.Result();
+   Res.TakeHashes(Hash);

 
    URIDone(Res);
 
    URIDone(Res);

-   

    return true;
 }
                                                                        /*}}}*/
 
    return true;
 }
                                                                        /*}}}*/
 

-int main()
+int main(int, char *argv[])

 {
 {

+   setlocale(LC_ALL, "");
+
+   Prog = strrchr(argv[0],'/');
+   ++Prog;
+

    GzipMethod Mth;
    GzipMethod Mth;

+
+   Mth.DropPrivsOrDie();
+

    return Mth.Run();
 }
    return Mth.Run();
 }