use a static FileFd::Write overload to reduce duplication of write()-retry code

apt-pkg/acquire-worker.cc

@@ -433,21 +433,7 @@ bool pkgAcquire::Worker::MediaChange(string Message)
 	     << endl;
 
       std::string const dlstatus = status.str();
-      size_t done = 0;
-      size_t todo = dlstatus.size();
-      errno = 0;
-      int res = 0;
-      do
-      {
-	 res = write(status_fd, dlstatus.c_str() + done, todo);
-	 if (res < 0 && errno == EINTR)
-	    continue;
-	 if (res < 0)
-	    break;
-	 done += res;
-	 todo -= res;
-      }
-      while (res > 0 && todo > 0);
+      FileFd::Write(status_fd, dlstatus.c_str(), dlstatus.size());
    }
 
    if (Log == 0 || Log->MediaChange(LookupTag(Message,"Media"),
@@ -546,17 +532,10 @@ bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
 /* */
 bool pkgAcquire::Worker::OutFdReady()
 {
-   int Res;
-   do
-   {
-      Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
-   }
-   while (Res < 0 && errno == EINTR);
-   
-   if (Res <= 0)
+   if (FileFd::Write(OutFd,OutQueue.c_str(),OutQueue.length()) == false)
       return MethodFailure();
    
-   OutQueue.erase(0,Res);
+   OutQueue.clear();
    if (OutQueue.empty() == true)
       OutReady = false;
    

apt-pkg/acquire.cc

@@ -874,21 +874,7 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
 	     << endl;
 
       std::string const dlstatus = status.str();
-      size_t done = 0;
-      size_t todo = dlstatus.size();
-      errno = 0;
-      int res = 0;
-      do
-      {
-	 res = write(fd, dlstatus.c_str() + done, todo);
-	 if (res < 0 && errno == EINTR)
-	    continue;
-	 if (res < 0)
-	    break;
-	 done += res;
-	 todo -= res;
-      }
-      while (res > 0 && todo > 0);
+      FileFd::Write(fd, dlstatus.c_str(), dlstatus.size());
    }
 
    return true;

apt-pkg/contrib/fileutl.cc

@@ -1301,6 +1301,28 @@ bool FileFd::Write(const void *From,unsigned long long Size)
    
    Flags |= Fail;
    return _error->Error(_("write, still have %llu to write but couldn't"), Size);
+}
+bool FileFd::Write(int Fd, const void *From, unsigned long long Size)
+{
+   int Res;
+   errno = 0;
+   do
+   {
+      Res = write(Fd,From,Size);
+      if (Res < 0 && errno == EINTR)
+	 continue;
+      if (Res < 0)
+	 return _error->Errno("write",_("Write error"));
+
+      From = (char *)From + Res;
+      Size -= Res;
+   }
+   while (Res > 0 && Size > 0);
+
+   if (Size == 0)
+      return true;
+
+   return _error->Error(_("write, still have %llu to write but couldn't"), Size);
 }
 									/*}}}*/
 // FileFd::Seek - Seek in the file					/*{{{*/

apt-pkg/contrib/fileutl.h

@@ -78,6 +78,7 @@ class FileFd
    bool Read(void *To,unsigned long long Size,unsigned long long *Actual = 0);
    char* ReadLine(char *To, unsigned long long const Size);
    bool Write(const void *From,unsigned long long Size);
+   bool static Write(int Fd, const void *From, unsigned long long Size);
    bool Seek(unsigned long long To);
    bool Skip(unsigned long long To);
    bool Truncate(unsigned long long To);

apt-pkg/deb/dpkgpm.cc

@@ -163,26 +163,6 @@ pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg)
    return Ver;
 }
 									/*}}}*/
-static ssize_t
-retry_write(int fd, const void *buf, size_t count)
-{
-   int Res;
-   ssize_t i = 0;
-   errno = 0;
-   do
-   {
-      Res = write(fd, buf, count);
-      if (Res < 0 && errno == EINTR)
-	 continue;
-      if (Res < 0)
-	 break;
-      buf = (char *)buf + Res;
-      count -= Res;
-      i += Res;
-   }
-   while (Res > 0 && count > 0);
-   return i;
-}
 
 // DPkgPM::pkgDPkgPM - Constructor					/*{{{*/
 // ---------------------------------------------------------------------
@@ -445,7 +425,7 @@ void pkgDPkgPM::DoStdin(int master)
    unsigned char input_buf[256] = {0,}; 
    ssize_t len = read(0, input_buf, sizeof(input_buf));
    if (len)
-      retry_write(master, input_buf, len);
+      FileFd::Write(master, input_buf, len);
    else
       d->stdin_is_dev_null = true;
 }
@@ -471,7 +451,7 @@ void pkgDPkgPM::DoTerminalPty(int master)
    }  
    if(len <= 0) 
       return;
-   retry_write(1, term_buf, len);
+   FileFd::Write(1, term_buf, len);
    if(d->term_out)
       fwrite(term_buf, len, sizeof(char), d->term_out);
 }
@@ -546,7 +526,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 	     << ":" << s
 	     << endl;
       if(OutStatusFd > 0)
-	 retry_write(OutStatusFd, status.str().c_str(), status.str().size());
+	 FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
       if (Debug == true)
 	 std::clog << "send: '" << status.str() << "'" << endl;
 
@@ -570,7 +550,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 	     << ":" << list[3]
 	     << endl;
       if(OutStatusFd > 0)
-	 retry_write(OutStatusFd, status.str().c_str(), status.str().size());
+	 FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
       if (Debug == true)
 	 std::clog << "send: '" << status.str() << "'" << endl;
       pkgFailures++;
@@ -584,7 +564,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 	     << ":" << list[3]
 	     << endl;
       if(OutStatusFd > 0)
-	 retry_write(OutStatusFd, status.str().c_str(), status.str().size());
+	 FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
       if (Debug == true)
 	 std::clog << "send: '" << status.str() << "'" << endl;
       return;
@@ -612,7 +592,7 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 	     << ":" << s
 	     << endl;
       if(OutStatusFd > 0)
-	 retry_write(OutStatusFd, status.str().c_str(), status.str().size());
+	 FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
       if (Debug == true)
 	 std::clog << "send: '" << status.str() << "'" << endl;
    }
@@ -1257,7 +1237,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 		<< (PackagesDone/float(PackagesTotal)*100.0) 
 		<< ":" << _("Running dpkg")
 		<< endl;
-	 retry_write(OutStatusFd, status.str().c_str(), status.str().size());
+	 FileFd::Write(OutStatusFd, status.str().c_str(), status.str().size());
       }
       Child = ExecFork();
             

debian/libapt-pkg4.12.symbols

@@ -1524,6 +1524,7 @@ libapt-pkg.so.4.12 libapt-pkg4.12 #MINVER#
  (c++)"GetListOfFilesInDir(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool)@Base" 0.8.16~exp13
  (c++)"pkgCache::DepIterator::IsIgnorable(pkgCache::PkgIterator const&) const@Base" 0.8.16~exp10
  (c++)"pkgCache::DepIterator::IsIgnorable(pkgCache::PrvIterator const&) const@Base" 0.8.16~exp10
+ (c++)"FileFd::Write(int, void const*, unsigned long long)@Base" 0.8.16~exp14
  (c++|optional=private)"pkgCacheGenerator::MergeListGroup(pkgCacheGenerator::ListParser&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)@Base" 0.8.16~exp7
  (c++|optional=private)"pkgCacheGenerator::MergeListPackage(pkgCacheGenerator::ListParser&, pkgCache::PkgIterator&)@Base" 0.8.16~exp7
  (c++|optional=private)"pkgCacheGenerator::MergeListVersion(pkgCacheGenerator::ListParser&, pkgCache::PkgIterator&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, pkgCache::VerIterator*&)@Base" 0.8.16~exp7