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

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 26285)
+++ base/file_util_posix.cc	(working copy)
@@ -513,20 +513,23 @@
   if (fd < 0)
     return -1;
 
-  // Allow for partial writes
+  int rv = WriteFileDescriptor(fd, data, size);
+  HANDLE_EINTR(close(fd));
+  return rv;
+}
+
+int WriteFileDescriptor(const int fd, const char* data, int size) {
+  // Allow for partial writes.
   ssize_t bytes_written_total = 0;
-  do {
-    ssize_t bytes_written_partial =
-      HANDLE_EINTR(write(fd, data + bytes_written_total,
-                         size - bytes_written_total));
-    if (bytes_written_partial < 0) {
-      HANDLE_EINTR(close(fd));
+  for (ssize_t bytes_written_partial = 0; bytes_written_total < size;
+       bytes_written_total += bytes_written_partial) {
+    bytes_written_partial =
+        HANDLE_EINTR(write(fd, data + bytes_written_total,
+                           size - bytes_written_total));
+    if (bytes_written_partial < 0)
       return -1;
-    }
-    bytes_written_total += bytes_written_partial;
-  } while (bytes_written_total < size);
+  }
 
-  HANDLE_EINTR(close(fd));
   return bytes_written_total;
 }