virsh: cmdBlock*: Remove 'error:' prefix for an empty line

When a block copy job fails prior to reaching the synchronized phase
while we are waiting for the job to finish virsh would print the
following:

 $ virsh blockcopy backup-test vda /tmp/dst.qcow2 --wait --reuse-external --transient-job
 error:
 Copy failed

The above message looks like we've forgot to print the error message
itself as the line ends after 'error:'. Unfortunately with the current
API design clients have no way of actually getting the error message as
the VIR_DOMAIN_EVENT_ID_BLOCK_JOB(_2) event only reports the status but
not an error and the job then vanishes.

Fix the expectations by using vshPrintExtra instead of vshError:

 $ virsh blockcopy backup-test vda /tmp/dst.qcow2 --wait --reuse-external --transient-job

 Copy failed

Note that the newline is required to avoid printing the 'Copy failed'
message on the same line when printing the job progress percentage.

Inspired by https://bugzilla.redhat.com/show_bug.cgi?id=1847867

Fix the same issue also for block pull and block commit job

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index b7dea5e8f7..085b88b097 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -2140,7 +2140,7 @@ cmdBlockcommit(vshControl *ctl, const vshCmd *cmd)
             break;
 
         case VIR_DOMAIN_BLOCK_JOB_FAILED:
-            vshError(ctl, "\n%s", _("Commit failed"));
+            vshPrintExtra(ctl, "\n%s", _("Commit failed"));
             goto cleanup;
             break;
 
@@ -2457,7 +2457,7 @@ cmdBlockcopy(vshControl *ctl, const vshCmd *cmd)
             break;
 
         case VIR_DOMAIN_BLOCK_JOB_FAILED:
-            vshError(ctl, "\n%s", _("Copy failed"));
+            vshPrintExtra(ctl, "\n%s", _("Copy failed"));
             goto cleanup;
             break;
 
@@ -2865,7 +2865,7 @@ cmdBlockpull(vshControl *ctl, const vshCmd *cmd)
             break;
 
         case VIR_DOMAIN_BLOCK_JOB_FAILED:
-            vshError(ctl, "\n%s", _("Pull failed"));
+            vshPrintExtra(ctl, "\n%s", _("Pull failed"));
             goto cleanup;
             break;