[systemd-devel] [PATCH] systemctl: add command set-log-level

[Vaclav Pavlin]

From: Václav Pavlín <vpavlin at redhat.com>

Command changes current log level
---
 man/systemctl.xml         |  8 ++++++++
 src/systemctl/systemctl.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/man/systemctl.xml b/man/systemctl.xml
index 9c3a5b0..af72972 100644
--- a/man/systemctl.xml
+++ b/man/systemctl.xml
@@ -1016,6 +1016,14 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service
       </varlistentry>
 
       <varlistentry>
+        <term><command>set-log-level <replaceable>LEVEL</replaceable></command></term>
+
+        <listitem>
+          <para>Change current log level to LEVEL.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
         <term><command>load <replaceable>NAME</replaceable>...</command></term>
 
         <listitem>
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 0955f2c..561386b 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -4462,6 +4462,47 @@ finish:
         return r;
 }
 
+static int set_log_level(DBusConnection *bus, char **args) {
+        _cleanup_dbus_error_free_ DBusError error;
+        _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
+        DBusMessageIter iter, sub;
+        const char* property = "LogLevel";
+        const char* interface = "org.freedesktop.systemd1.Manager";
+        const char* value;
+
+        assert(bus);
+        assert(args);
+
+        value = args[1];
+        dbus_error_init(&error);
+
+        if (!(m = dbus_message_new_method_call(
+                        "org.freedesktop.systemd1",
+                        "/org/freedesktop/systemd1",
+                        "org.freedesktop.DBus.Properties",
+                        "Set")))
+                return log_oom();
+
+        dbus_message_iter_init_append(m, &iter);
+
+        if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
+            !dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &property) ||
+            !dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, "s", &sub) ||
+            !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &value) ||
+            !dbus_message_iter_close_container(&iter, &sub))
+                return log_oom();
+
+
+        reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+        if (!reply) {
+                log_error("Failed to issue method call: %s", bus_error_message(&error));
+                return -EIO;
+        }
+
+        return 0;
+
+}
+
 static int unit_is_enabled(DBusConnection *bus, char **args) {
         _cleanup_dbus_error_free_ DBusError error;
         int r;
@@ -5705,6 +5746,7 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError
                 { "list-dependencies",     LESS,  2, list_dependencies },
                 { "set-default",           EQUAL, 2, enable_unit       },
                 { "get-default",           LESS,  1, get_default       },
+                { "set-log-level",         EQUAL, 2, set_log_level     },
         };
 
         int left;
-- 
1.8.1.4