man: document protocol error type for service failures (#4724)

diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 03e55a7aff62afa1fe622c401140260cafe272fb..abc275aad0a7b22eb915fd0923cacb9591aa53df 100644 (file)
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -1771,14 +1771,15 @@
 
         <listitem><para>Only defined for the service unit type, this environment variable is passed to all
         <varname>ExecStop=</varname> and <varname>ExecStopPost=</varname> processes, and encodes the service
-        "result". Currently, the following values are defined: <literal>timeout</literal> (in case of an operation
-        timeout), <literal>exit-code</literal> (if a service process exited with a non-zero exit code; see
-        <varname>$EXIT_CODE</varname> below for the actual exit code returned), <literal>signal</literal> (if a
-        service process was terminated abnormally by a signal; see <varname>$EXIT_CODE</varname> below for the actual
-        signal used for the termination), <literal>core-dump</literal> (if a service process terminated abnormally and
-        dumped core), <literal>watchdog</literal> (if the watchdog keep-alive ping was enabled for the service but it
-        missed the deadline), or <literal>resources</literal> (a catch-all condition in case a system operation
-        failed).</para>
+        "result". Currently, the following values are defined: <literal>protocol</literal> (in case of a protocol
+        violation; if a service did not take the steps required by its configuration), <literal>timeout</literal> (in
+        case of an operation timeout), <literal>exit-code</literal> (if a service process exited with a non-zero exit
+        code; see <varname>$EXIT_CODE</varname> below for the actual exit code returned), <literal>signal</literal>
+        (if a service process was terminated abnormally by a signal; see <varname>$EXIT_CODE</varname> below for the
+        actual signal used for the termination), <literal>core-dump</literal> (if a service process terminated
+        abnormally and dumped core), <literal>watchdog</literal> (if the watchdog keep-alive ping was enabled for the
+        service but it missed the deadline), or <literal>resources</literal> (a catch-all condition in case a system
+        operation failed).</para>
 
         <para>This environment variable is useful to monitor failure or successful termination of a service. Even
         though this variable is available in both <varname>ExecStop=</varname> and <varname>ExecStopPost=</varname>, it