usage of Skipping in pipes can't work, so we ignore-read instead

[apt.git] / methods / gzip.cc

diff --git a/methods/gzip.cc b/methods/gzip.cc
index c0092c7550ace7523f1f9c10a5d14cd2a429e9bb..6ab6548efb56f82edea77f4de17763e14d3c2953 100644 (file)
--- a/methods/gzip.cc
+++ b/methods/gzip.cc
@@ -1,6 +1,6 @@
 // -*- 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 
@@ -9,6 +9,8 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
+#include <config.h>
+
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/acquire-method.h>
@@ -20,6 +22,7 @@
 #include <utime.h>
 #include <stdio.h>
 #include <errno.h>
+#include <apti18n.h>
                                                                        /*}}}*/
 
 class GzipMethod : public pkgAcqMethod
@@ -34,89 +37,52 @@ class GzipMethod : public pkgAcqMethod
 
 // 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;
-   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);
    
    // Open the source and destination files
-   FileFd From(Path,FileFd::ReadOnly);
+   FileFd From(Path,FileFd::ReadOnly, FileFd::Gzip);
 
-   int GzOut[2];   
-   if (pipe(GzOut) < 0)
-      return _error->Errno("pipe","Couldn't open pipe for gzip");
+   if(From.FileSize() == 0)
+      return _error->Error(_("Empty files can't be valid archives"));
 
-   // Fork gzip
-   int Process = ExecFork();
-   if (Process == 0)
-   {
-      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.Close();
-   close(GzOut[1]);
-   
-   FileFd FromGz(GzOut[0]);  // For autoclose   
-   FileFd To(Itm->DestFile,FileFd::WriteEmpty);   
+   FileFd To(Itm->DestFile,FileFd::WriteAtomic);   
    To.EraseOnFailure();
    if (_error->PendingError() == true)
       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];
-      unsigned long Count;
-      
-      Count = read(GzOut[0],Buffer,sizeof(Buffer));
-      if (Count < 0 && errno == EINTR)
-        continue;
+      unsigned long long Count = 0;
       
-      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;
-      
+
       Hash.Add(Buffer,Count);
       if (To.Write(Buffer,Count) == false)
-      {         
+      {
         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();
    To.Close();
    
    if (Failed == true)
@@ -125,21 +91,21 @@ bool GzipMethod::Fetch(FetchItem *Itm)
    // 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");
+      return _error->Errno("utime",_("Failed to set modification time"));
 
    if (stat(Itm->DestFile.c_str(),&Buf) != 0)
-      return _error->Errno("stat","Failed to stat");
+      return _error->Errno("stat",_("Failed to stat"));
    
    // Return a Done response
    Res.LastModified = Buf.st_mtime;
    Res.Size = Buf.st_size;
-   Res.MD5Sum = Hash.MD5.Result();
+   Res.TakeHashes(Hash);
 
    URIDone(Res);
    
@@ -147,8 +113,10 @@ bool GzipMethod::Fetch(FetchItem *Itm)
 }
                                                                        /*}}}*/
 
-int main()
+int main(int argc, char *argv[])
 {
+   setlocale(LC_ALL, "");
+
    GzipMethod Mth;
    return Mth.Run();
 }