[Qemu-devel] [RFC PATCH] qemu-socket: Use local error variable

[Kevin Wolf <kwolf@redhat.com>]

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
After rebasing this I saw that Anthony already committed a fix that is
very close to my v1. I don't intend to actually change that code, but as
I've already done this, just for comparison what it would look like with
error propagation. Is this what you meant? I find the result more
confusing, to be honest.
---
 util/qemu-sockets.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 3f12296..f231e9c 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -359,6 +359,7 @@ int inet_connect_opts(QemuOpts *opts, Error **errp,
     int sock = -1;
     bool in_progress;
     ConnectState *connect_state = NULL;
+    Error *local_err = NULL;
 
     res = inet_parse_connect_opts(opts, errp);
     if (!res) {
@@ -373,15 +374,17 @@ int inet_connect_opts(QemuOpts *opts, Error **errp,
     }
 
     for (e = res; e != NULL; e = e->ai_next) {
-        if (error_is_set(errp)) {
-            error_free(*errp);
-            *errp = NULL;
-        }
+
+        Error *ret_err = NULL;
+
         if (connect_state != NULL) {
             connect_state->current_addr = e;
         }
-        sock = inet_connect_addr(e, &in_progress, connect_state, errp);
-        if (in_progress) {
+        sock = inet_connect_addr(e, &in_progress, connect_state, &ret_err);
+        if (error_is_set(&ret_err)) {
+            error_propagate(&local_err, ret_err);
+        } else if (in_progress) {
+            error_free(local_err);
             return sock;
         } else if (sock >= 0) {
             /* non blocking socket immediate success, call callback */
@@ -393,6 +396,11 @@ int inet_connect_opts(QemuOpts *opts, Error **errp,
     }
     g_free(connect_state);
     freeaddrinfo(res);
+    if (sock >= 0) {
+        error_free(local_err);
+    } else {
+        error_propagate(errp, local_err);
+    }
     return sock;
 }
 
-- 
1.8.1.4