#14416: conditionally add LOG_AUTHPRIV facility and LOG_ODELAY to syslog.

Unlike the other facilities, we don't use a fallback for AUTHPRIV if it
doesn't exist.  Because it is intended for logging sensitive log messages, it
is better that a program trying to log such messages fail than that it log
them insecurely.

Initial patch by Federico Reghenzani.

Doc/library/syslog.rst

@@ -78,12 +78,14 @@ Priority levels (high to low):
 Facilities:
    :const:`LOG_KERN`, :const:`LOG_USER`, :const:`LOG_MAIL`, :const:`LOG_DAEMON`,
    :const:`LOG_AUTH`, :const:`LOG_LPR`, :const:`LOG_NEWS`, :const:`LOG_UUCP`,
-   :const:`LOG_CRON`, :const:`LOG_SYSLOG` and :const:`LOG_LOCAL0` to
+   :const:`LOG_CRON`, :const:`LOG_SYSLOG`, :const:`LOG_LOCAL0` to
-   :const:`LOG_LOCAL7`.
+   :const:`LOG_LOCAL7`, and, if defined in ``<syslog.h>``,
+   :const:`LOG_AUTHPRIV`.
 
 Log options:
-   :const:`LOG_PID`, :const:`LOG_CONS`, :const:`LOG_NDELAY`, :const:`LOG_NOWAIT`
+   :const:`LOG_PID`, :const:`LOG_CONS`, :const:`LOG_NDELAY`, and, if defined
-   and :const:`LOG_PERROR` if defined in ``<syslog.h>``.
+   in ``<syslog.h>``, :const:`LOG_ODELAY`, :const:`LOG_NOWAIT`, and
+   :const:`LOG_PERROR`.
 
 
 Examples

Misc/ACKS

@@ -832,6 +832,7 @@ Terry Reedy
 Gareth Rees
 Steve Reeves
 Lennart Regebro
+Federico Reghenzani
 Ofir Reichenberg
 Sean Reifschneider
 Michael P. Reilly

Misc/NEWS

@@ -34,6 +34,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #14416: syslog now defines the LOG_ODELAY and LOG_AUTHPRIV constants
+  if they are defined in <syslog.h>.
+
 - IDLE can be launched as python -m idlelib
 
 - Issue #14295: Add unittest.mock

Modules/syslogmodule.c

@@ -291,6 +291,9 @@ PyInit_syslog(void)
     PyModule_AddIntConstant(m, "LOG_PID",         LOG_PID);
     PyModule_AddIntConstant(m, "LOG_CONS",        LOG_CONS);
     PyModule_AddIntConstant(m, "LOG_NDELAY",  LOG_NDELAY);
+#ifdef LOG_ODELAY
+    PyModule_AddIntConstant(m, "LOG_ODELAY",  LOG_ODELAY);
+#endif
 #ifdef LOG_NOWAIT
     PyModule_AddIntConstant(m, "LOG_NOWAIT",  LOG_NOWAIT);
 #endif
@@ -331,5 +334,10 @@ PyInit_syslog(void)
     PyModule_AddIntConstant(m, "LOG_CRON",        LOG_CRON);
     PyModule_AddIntConstant(m, "LOG_UUCP",        LOG_UUCP);
     PyModule_AddIntConstant(m, "LOG_NEWS",        LOG_NEWS);
+
+#ifdef LOG_AUTHPRIV
+    PyModule_AddIntConstant(m, "LOG_AUTHPRIV",    LOG_AUTHPRIV);
+#endif
+
     return m;
 }