[PATCH v4 4/6] virStream*All: Preserve reported error

[Michal Privoznik <mprivozn@xxxxxxxxxx>]

If one these four functions fail (virStreamRecvAll,
virStreamSendAll, virStreamSparseRecvAll, virStreamSparseSendAll)
the stream is aborted by calling virStreamAbort(). This is,
however, an public API - therefore the first thing it does is
error reset. At that point any error that caused us to abort
stream in the first place is gone.

Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
 src/libvirt-stream.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/libvirt-stream.c b/src/libvirt-stream.c
index bff0a0571..1594ed212 100644
--- a/src/libvirt-stream.c
+++ b/src/libvirt-stream.c
@@ -614,7 +614,12 @@ virStreamSendAll(virStreamPtr stream,
     VIR_FREE(bytes);
 
     if (ret != 0) {
+        virErrorPtr orig_err = virSaveLastError();
         virStreamAbort(stream);
+        if (orig_err) {
+            virSetError(orig_err);
+            virFreeError(orig_err);
+        }
         virDispatchError(stream->conn);
     }
 
@@ -769,7 +774,12 @@ int virStreamSparseSendAll(virStreamPtr stream,
     VIR_FREE(bytes);
 
     if (ret != 0) {
+        virErrorPtr orig_err = virSaveLastError();
         virStreamAbort(stream);
+        if (orig_err) {
+            virSetError(orig_err);
+            virFreeError(orig_err);
+        }
         virDispatchError(stream->conn);
     }
 
@@ -863,7 +873,12 @@ virStreamRecvAll(virStreamPtr stream,
     VIR_FREE(bytes);
 
     if (ret != 0) {
+        virErrorPtr orig_err = virSaveLastError();
         virStreamAbort(stream);
+        if (orig_err) {
+            virSetError(orig_err);
+            virFreeError(orig_err);
+        }
         virDispatchError(stream->conn);
     }
 
@@ -983,7 +998,12 @@ virStreamSparseRecvAll(virStreamPtr stream,
     VIR_FREE(bytes);
 
     if (ret != 0) {
+        virErrorPtr orig_err = virSaveLastError();
         virStreamAbort(stream);
+        if (orig_err) {
+            virSetError(orig_err);
+            virFreeError(orig_err);
+        }
         virDispatchError(stream->conn);
     }
 
-- 
2.13.0

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