[PATCH v4 23/23] util: add brackets around guest name in message context

["Daniel P. Berrangé" <berrange@redhat.com>]

The message context can optionally include the guest name if the
argument '-msg guest-name=on' is given. The formatting, however,
does not look good if the guest name contains whitespace. Change
the output to include square brackets to demarcate the name.

Before:

  # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*' -msg guest-name=on -name "fish food"
  fish food qemu-system-x86_64: (1146846:main): qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x55657e94e690 dir=fish
  fish food qemu-system-x86_64: (1146846:main): qcrypto_tls_creds_get_path TLS creds path creds=0x55657e94e690 filename=ca-cert.pem path=<none>
  fish food qemu-system-x86_64: (1146846:main): Unable to access credentials fish/ca-cert.pem: No such file or directory

After:

  # qemu-system-x86_64 -object tls-creds-x509,id=t0,dir=fish -d 'trace:qcrypto*' -msg guest-name=on -name "fish food"
  [fish food] qemu-system-x86_64: (1144713:main): qcrypto_tls_creds_x509_load TLS creds x509 load creds=0x5604ada2c950 dir=fish
  [fish food] qemu-system-x86_64: (1144713:main): qcrypto_tls_creds_get_path TLS creds path creds=0x5604ada2c950 filename=ca-cert.pem path=<none>
  [fish food] qemu-system-x86_64: (1144713:main): Unable to access credentials fish/ca-cert.pem: No such file or directory

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 util/message.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/util/message.c b/util/message.c
index 814ca0316e..7d94b9d970 100644
--- a/util/message.c
+++ b/util/message.c
@@ -28,7 +28,7 @@ void qmessage_context_print(FILE *fp)
 
     if ((message_format & QMESSAGE_FORMAT_WORKLOAD_NAME) &&
         message_workloadname) {
-        fprintf(fp, "%s ", message_workloadname);
+        fprintf(fp, "[%s] ", message_workloadname);
     }
 
     if (message_format & QMESSAGE_FORMAT_PROGRAM_NAME) {
-- 
2.50.1