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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756490688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/d1KbXp3NlbzRl97qpGniZuRtrRxyln2ywplCOuUaXM=; b=L432BJAiwxCgSNSnHtHyw+txycz8RutjuzV8Gv8g1sfasE5f0nz7BUZicH51EvjkioQr8N Dyq5falE9H1iQkKHdsbX/lp5oNDJD/xa7JhVzmTXzgE+9YYCrJNOfHY+NPw5eZ8BgQch3T 6UopNOTofMTKxYb+CzqIaCtBV4hyzr0= X-MC-Unique: edvmDuEcMJuJZ6GrDQULTg-1 X-Mimecast-MFC-AGG-ID: edvmDuEcMJuJZ6GrDQULTg_1756490682 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Stefan Weil , qemu-block@nongnu.org, Manos Pitsidianakis , "Dr. David Alan Gilbert" , Kevin Wolf , Hanna Reitz , Gerd Hoffmann , Christian Schoenebeck , Markus Armbruster , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v2 08/14] log: avoid prefix on split qemu_log calls Date: Fri, 29 Aug 2025 19:03:48 +0100 Message-ID: <20250829180354.2922145-9-berrange@redhat.com> In-Reply-To: <20250829180354.2922145-1-berrange@redhat.com> References: <20250829180354.2922145-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1756570109078116600 Some code makes multiple qemu_log calls to incrementally emit a single message. Currently timestamps get prepended to all qemu_log calls, even those continuing a previous incomplete message. This changes the qemu_log so it skips adding a new line prefix, if the previous qemu_log call did NOT end with a newline. Richard Henderson Signed-off-by: Daniel P. Berrang=C3=A9 --- util/log.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/util/log.c b/util/log.c index abdcb6b311..2642a55c59 100644 --- a/util/log.c +++ b/util/log.c @@ -143,6 +143,12 @@ void qemu_log_unlock(FILE *logfile) } } =20 +/* + * 'true' if the previous log message lacked a trailing '\n', + * and thus the subsequent call must skip any prefix + */ +static __thread bool incomplete; + void qemu_log(const char *fmt, ...) { FILE *f; @@ -154,7 +160,7 @@ void qemu_log(const char *fmt, ...) * was emitted if we are delayed acquiring the * mutex */ - if (message_with_timestamp) { + if (message_with_timestamp && !incomplete) { g_autoptr(GDateTime) dt =3D g_date_time_new_now_utc(); timestr =3D g_date_time_format_iso8601(dt); } @@ -170,6 +176,7 @@ void qemu_log(const char *fmt, ...) va_start(ap, fmt); vfprintf(f, fmt, ap); va_end(ap); + incomplete =3D fmt[strlen(fmt) - 1] !=3D '\n'; qemu_log_unlock(f); } } --=20 2.50.1