util: convenience function to create gmime stream for stdout

It turns out that our use of GMimeStreamPipe has only succeeded
because gmime has been ignoring some seek failures; this will no
longer be the case in gmime 3.0, so we use a GMimeStreamPipe, which
does not assume seekability, wrapped in a buffering stream.

1 files changed, 20 insertions, 0 deletions

diff --git a/util/gmime-extra.c b/util/gmime-extra.c
new file mode 100644
index 00000000..f1538587
--- /dev/null
+++ b/util/gmime-extra.c
@@ -0,0 +1,20 @@
+#include "gmime-extra.h"
+
+GMimeStream *
+g_mime_stream_stdout_new()
+{
+    GMimeStream *stream_stdout = NULL;
+    GMimeStream *stream_buffered = NULL;
+
+    stream_stdout = g_mime_stream_pipe_new (STDOUT_FILENO);
+    if (!stream_stdout)
+	return NULL;
+
+    g_mime_stream_pipe_set_owner (GMIME_STREAM_PIPE (stream_stdout), FALSE);
+
+    stream_buffered = g_mime_stream_buffer_new (stream_stdout, GMIME_STREAM_BUFFER_BLOCK_WRITE);
+
+    g_object_unref (stream_stdout);
+
+    return stream_buffered;
+}