Log uts information on launch of the session and relay daemon

To make debugging easier, log uts information on launch of the daemons.

Produces an output of the following form when the daemons are launched
in verbose mode:
  DBG1 - 14:30:14.997217006 [Main]: System information: (in log_system_information() at logging-utils.cpp:23)
  DBG1 - 14:30:14.997221139 [Main]: 	sysname: `Linux` (in log_system_information() at logging-utils.cpp:24)
  DBG1 - 14:30:14.997227199 [Main]: 	nodename: `carbonara` (in log_system_information() at logging-utils.cpp:25)
  DBG1 - 14:30:14.997231284 [Main]: 	release: `6.1.1-arch1-1` (in log_system_information() at logging-utils.cpp:26)
  DBG1 - 14:30:14.997235261 [Main]: 	version: `#1 SMP PREEMPT_DYNAMIC Wed, 21 Dec 2022 22:27:55 +0000` (in log_system_information() at logging-utils.cpp:27)
  DBG1 - 14:30:14.997240214 [Main]: 	machine: `x86_64` (in log_system_information() at logging-utils.cpp:28)

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I399fe8a88da8480e617cc33dd6b1dc2723c300c7

diff --git a/src/bin/lttng-sessiond/main.cpp b/src/bin/lttng-sessiond/main.cpp
index 23136f7c8deab6aa4677d51b9b40908b0c76edfd..5d6e03775bf36cbd519744b3b76b671775272231 100644 (file)
--- a/src/bin/lttng-sessiond/main.cpp
+++ b/src/bin/lttng-sessiond/main.cpp
@@ -42,6 +42,8 @@
 #include <common/config/session-config.hpp>
 #include <common/ini-config/ini-config.hpp>
 #include <common/dynamic-buffer.hpp>
+#include <common/logging-utils.hpp>
+
 #include <lttng/event-internal.hpp>
 #include "lttng-sessiond.hpp"
 #include "buffer-registry.hpp"
@@ -1538,6 +1540,7 @@ int main(int argc, char **argv)
 
        sessiond_config_log(&the_config);
        sessiond_uuid_log();
+       lttng::logging::log_system_information(PRINT_DBG);
 
        if (opt_print_version) {
                print_version();

diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index 66ab77d05d9cf825c61feb7c8edb49d77f85a6e1..522a1ee3248ecc4be8b26cce081c416f56a00e2e 100644 (file)
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -89,6 +89,7 @@ libcommon_lgpl_la_SOURCES = \
        kernel-probe.cpp \
        location.cpp \
        locked-reference.hpp \
+       logging-utils.hpp logging-utils.cpp \
        log-level-rule.cpp \
        make-unique.hpp \
        make-unique-wrapper.hpp \

diff --git a/src/common/logging-utils.cpp b/src/common/logging-utils.cpp
new file mode 100644 (file)
index 0000000..a0f307a
--- /dev/null
+++ b/src/common/logging-utils.cpp
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2023 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#include <common/logging-utils.hpp>
+
+#include <sys/utsname.h>
+
+/* Output system information as logging statements. */
+void lttng::logging::log_system_information(lttng_error_level error_level)
+{
+       struct utsname name = {};
+       const int ret = uname(&name);
+
+       if (ret) {
+               PERROR("Failed to get system information using uname()")
+               return;
+       }
+
+       LOG(error_level, "System information:");
+       LOG(error_level, "\tsysname: `%s`", name.sysname);
+       LOG(error_level, "\tnodename: `%s`", name.nodename);
+       LOG(error_level, "\trelease: `%s`", name.release);
+       LOG(error_level, "\tversion: `%s`", name.version);
+       LOG(error_level, "\tmachine: `%s`", name.machine);
+}

diff --git a/src/common/logging-utils.hpp b/src/common/logging-utils.hpp
new file mode 100644 (file)
index 0000000..1bd6c15
--- /dev/null
+++ b/src/common/logging-utils.hpp
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2023 Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ *
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_LOGGING_UTILS_H
+#define LTTNG_LOGGING_UTILS_H
+
+#include <common/error.hpp>
+
+namespace lttng {
+namespace logging {
+
+/* Output system information as logging statements. */
+void log_system_information(lttng_error_level error_level);
+
+} /* namespace logging */
+} /* namespace lttng */
+
+#endif /* LTTNG_LOGGING_UTILS_H */