libvirt_iohelper: record the libvirt_iohelper's error message at virFileWrapperFdFree

Currently iohelper's error log is recorded in virFileWrapperFdClose.
However, if something goes wrong the caller might not even get to
calling virFileWrapperFdClose and call virFileWrapperFdFree
directly. Therefore the error reporting should happen there.
Signed-off-by: Nxinhua.Cao <caoxinhua@huawei.com>
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/util/virfile.c

@@ -330,9 +330,6 @@ virFileWrapperFdClose(virFileWrapperFdPtr wfd)
         return 0;
 
     ret = virCommandWait(wfd->cmd, NULL);
-    if (wfd->err_msg && *wfd->err_msg)
-        VIR_WARN("iohelper reports: %s", wfd->err_msg);
-
     return ret;
 }
 
@@ -351,8 +348,12 @@ virFileWrapperFdFree(virFileWrapperFdPtr wfd)
     if (!wfd)
         return;
 
-    VIR_FREE(wfd->err_msg);
+    if (wfd->err_msg && *wfd->err_msg)
+        VIR_WARN("iohelper reports: %s", wfd->err_msg);
 
+    virCommandAbort(wfd->cmd);
+
+    VIR_FREE(wfd->err_msg);
     virCommandFree(wfd->cmd);
     VIR_FREE(wfd);
 }