From 0658666bacde7decbc362f0f589fe6aa5251faba Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 9 Feb 2011 12:12:30 +0100
Subject: [PATCH] manager: if we receive SIGRTMIN+20/21 enable/disable showing
 of status on the console

---
 man/systemd.xml | 57 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/manager.c   | 18 +++++++++++++++-
 2 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/man/systemd.xml b/man/systemd.xml
index c6c06e57..88904b7a 100644
--- a/man/systemd.xml
+++ b/man/systemd.xml
@@ -720,6 +720,63 @@
                                 <command>systemctl start
                                 reboot.target</command>.</para></listitem>
                         </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+6</term>
+
+                                <listitem><para>Reboots the machine via kexec,
+                                starts the
+                                <filename>kexec.target</filename>
+                                unit. This is mostly equivalent to
+                                <command>systemctl start
+                                kexec.target</command>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+13</term>
+
+                                <listitem><para>Immediately halts the machine.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+14</term>
+
+                                <listitem><para>Immediately powers off the machine.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+15</term>
+
+                                <listitem><para>Immediately reboots the machine.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+16</term>
+
+                                <listitem><para>Immediately reboots the machine with kexec.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+20</term>
+
+                                <listitem><para>Enables display of
+                                status messages on the console, as
+                                controlled via
+                                <varname>systemd.show_status=1</varname>
+                                on the kernel command
+                                line.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term>SIGRTMIN+21</term>
+
+                                <listitem><para>Disables display of
+                                status messages on the console, as
+                                controlled via
+                                <varname>systemd.show_status=0</varname>
+                                on the kernel command
+                                line.</para></listitem>
+                        </varlistentry>
                 </variablelist>
         </refsect1>
 
diff --git a/src/manager.c b/src/manager.c
index 2714df11..4a840821 100644
--- a/src/manager.c
+++ b/src/manager.c
@@ -174,6 +174,8 @@ static int manager_setup_signals(Manager *m) {
                         SIGRTMIN+14, /* systemd: Immediate poweroff */
                         SIGRTMIN+15, /* systemd: Immediate reboot */
                         SIGRTMIN+16, /* systemd: Immediate kexec */
+                        SIGRTMIN+20, /* systemd: enable status messages */
+                        SIGRTMIN+21, /* systemd: disable status messages */
                         -1);
         assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
 
@@ -2177,7 +2179,21 @@ static int manager_process_signal_fd(Manager *m) {
                                 break;
                         }
 
-                        log_warning("Got unhandled signal <%s>.", strna(signal_to_string(sfsi.ssi_signo)));
+                        switch (sfsi.ssi_signo - SIGRTMIN) {
+
+                        case 20:
+                                log_debug("Enabling showing of status.");
+                                m->show_status = true;
+                                break;
+
+                        case 21:
+                                log_debug("Disabling showing of status.");
+                                m->show_status = false;
+                                break;
+
+                        default:
+                                log_warning("Got unhandled signal <%s>.", strna(signal_to_string(sfsi.ssi_signo)));
+                        }
                 }
                 }
         }
-- 
2.39.5