Automatically add default log block that logs everything if no log

block to disk is present.
Also update the English example.conf.

Both may need some default filtering (or not)...

doc/conf/examples/example.conf

@@ -265,20 +265,14 @@ drpass {
  * See also https://www.unrealircd.org/docs/Log_block
  */
 
-/* This is a good default, it logs everything */
-log "ircd.log" {
-	flags {
-		oper;
-		connects;
-		server-connects;
-		kills;
-		errors;
-		flood;
-		sadmin-commands;
-		chg-commands;
-		oper-override;
-		tkl;
-		spamfilter;
+/* This is a good default, it logs nearly everything */
+log {
+	source {
+		all;
+		!SOMETHING;
+	}
+	destination {
+		file "ircd.log" { maxsize 100M; }
 	}
 }
 

include/h.h

@@ -1126,6 +1126,7 @@ extern LogData *log_data_link_block(ConfigItem_link *link);
 extern LogData *log_data_tkl(const char *key, TKL *tkl);
 extern LogData *log_data_tls_error(void);
 extern void log_blocks_switchover(void);
+extern void postconf_defaults_log_block(void);
 extern LogLevel log_level_stringtoval(const char *str);
 extern const char *log_level_valtostring(LogLevel loglevel);
 extern LogLevel log_level_stringtoval(const char *str);

src/conf.c

@@ -1847,6 +1847,8 @@ void postconf_defaults(void)
 				safe_strdup(tk->set_by, conf_me->name ? conf_me->name : "~server~");
 		}
 	}
+
+	postconf_defaults_log_block();
 }
 
 void postconf_fixes(void)

src/log.c

@@ -1660,3 +1660,32 @@ void log_blocks_switchover(void)
  * blocks, then we would have opened the file twice.
  * Better to use an extra layer to keep track of files.
  */
+
+void postconf_defaults_log_block(void)
+{
+	Log *l;
+	LogSource *ls;
+
+	/* Is there any log block to disk? Then nothing to do. */
+	if (logs[LOG_DEST_OTHER])
+		return;
+
+	unreal_log(ULOG_WARNING, "log", "NO_DISK_LOG_BLOCK", NULL,
+	           "No log { } block found that logs to disk -- "
+	           "logging everything in text format to 'ircd.log'");
+
+	/* Create a default log block */
+	l = safe_alloc(sizeof(Log));
+	l->logfd = -1;
+	l->type = LOG_TYPE_TEXT; /* text */
+	l->maxsize = 100000000; /* maxsize 100M */
+	safe_strdup(l->file, "ircd.log");
+	convert_to_absolute_path(&l->file, LOGDIR);
+	AddListItem(l, logs[LOG_DEST_OTHER]);
+
+	/* And the source filter */
+	ls = add_log_source("all");
+	AppendListItem(ls, l->sources);
+	ls = add_log_source("!SOMETHING");
+	AppendListItem(ls, l->sources);
+}