Added no_tempfile parameter to write_chunks_to_file to do non-atomic writes. Implements #1376.

1 files changed, 10 insertions, 3 deletions

diff --git a/src/common/util.c b/src/common/util.c
index 6e14a58dd..4e84d942e 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -2190,12 +2190,19 @@ write_chunks_to_file_impl(const char *fname, const smartlist_t *chunks,
   return -1;
 }
 
-/** Given a smartlist of sized_chunk_t, write them atomically to a file
- * <b>fname</b>, overwriting or creating the file as necessary. */
+/** Given a smartlist of sized_chunk_t, write them to a file
+ * <b>fname</b>, overwriting or creating the file as necessary. 
+ * If <b>no_tempfile</b> is 0 then the file will be written
+ * atomically. */
 int
-write_chunks_to_file(const char *fname, const smartlist_t *chunks, int bin)
+write_chunks_to_file(const char *fname, const smartlist_t *chunks, int bin, int no_tempfile)
 {
   int flags = OPEN_FLAGS_REPLACE|(bin?O_BINARY:O_TEXT);
+
+  if (no_tempfile) {
+    // O_APPEND stops write_chunks_to_file from using tempfiles
+    flags |= O_APPEND;
+  }
   return write_chunks_to_file_impl(fname, chunks, flags);
 }