Linux: print page to file rather than using shared memory to send it to the b...

printing/pdf_ps_metafile_linux.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/pdf_ps_metafile_linux.h"
 
 #include <stdio.h>
 
 #include <cairo.h>
 #include <cairo-ft.h>
 #include <cairo-pdf.h>
 #include <cairo-ps.h>
 
 #include <ft2build.h>
 #include FT_FREETYPE_H
 
 #include <map>
 
+#include "base/eintr_wrapper.h"
+#include "base/file_descriptor_posix.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/singleton.h"
 #include "third_party/skia/include/core/SkFontHost.h"
 #include "third_party/skia/include/core/SkStream.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 
 namespace {
 
 FT_Library g_ft_library = NULL;  // handle to FreeType library.
@@ skipping 435 matching lines @@
   size_t data_size = GetDataSize();
   if (dst_buffer_size > data_size) {
     return false;
   }
 
   memcpy(dst_buffer, all_pages_.data(), dst_buffer_size);
 
   return true;
 }
 
-bool PdfPsMetafile::SaveTo(const FilePath& filename) const {
+bool PdfPsMetafile::SaveTo(const base::FileDescriptor& fd) const {
   // We need to check at least these two members to ensure that either Init()
   // has been called to initialize |all_pages_|, or metafile has been closed.
   // Passing these two checks also implies that surface_, page_surface_, and
   // page_context_ are NULL, and current_page_ is empty.
   DCHECK(!context_);
   DCHECK(!all_pages_.empty());
 
-  const unsigned int data_size = GetDataSize();
-  const unsigned int bytes_written =
-      file_util::WriteFile(filename, all_pages_.data(), data_size);
-  if (bytes_written != data_size) {
-    DLOG(ERROR) << "Failed to save file: " << filename.value();
+  if (fd.fd < 0) {
+    DLOG(ERROR) << "Invalid file descriptor!";
     return false;
   }
 
-  return true;
+  bool success = true;
+  if (file_util::WriteFileDescriptor(fd.fd, all_pages_.data(),
+                                     GetDataSize()) < 0) {
+    DLOG(ERROR) << "Failed to save file with fd " << fd.fd;
+    success = false;
+  }
+
+  if (fd.auto_close)
+    HANDLE_EINTR(close(fd.fd));
+  return success;
 }
 
 void PdfPsMetafile::CleanUpAll() {
   CleanUpContext(&context_);
   CleanUpSurface(&surface_);
   CleanUpContext(&page_context_);
   CleanUpSurface(&page_surface_);
   current_page_.clear();
   all_pages_.clear();
   CleanUpFonts();
   CleanUpFreeType();
 }
 
 }  // namespace printing