conf: move 'run-time-feature-disable' options to new FEATURE section

doc/sample-ngircd.conf.tmpl

@@ -134,19 +134,6 @@
 	# Allow Pre-Defined Channels only (see Section [Channels])
 	;PredefChannelsOnly = no
 
-	# Do any DNS lookups when a client connects to the server.
-	;DNS = yes
-
-	# Do any IDENT lookups if ngIRCd has been compiled with support for it.
-	;Ident = yes
-
-	# Use PAM if ngIRCd has been compiled with support for it.
-	;PAM = no
-
-	# Use ZeroConf service registration if ngIRCd has been
-	# compiled with support for it (e.g. Howl, Avahi, Mac OS X).
-	;ZeroConf = no
-
 	# try to connect to other irc servers using ipv4 and ipv6, if possible
 	;ConnectIPv6 = yes
 	;ConnectIPv4 = yes
@@ -167,6 +154,20 @@
 	# maximum nick name length!
 	;MaxNickLength = 9
 
+[Features]
+	# Do any DNS lookups when a client connects to the server.
+	;DNS = yes
+
+	# Do any IDENT lookups if ngIRCd has been compiled with support for it.
+	;Ident = yes
+
+	# Use PAM if ngIRCd has been compiled with support for it.
+	;PAM = no
+
+	# Use ZeroConf service registration if ngIRCd has been
+	# compiled with support for it (e.g. Howl, Avahi, Mac OS X).
+	;ZeroConf = no
+
 [Operator]
 	# [Operator] sections are used to define IRC Operators. There may be
 	# more than one [Operator] block, one for each local operator.

man/ngircd.conf.5.tmpl

@@ -47,13 +47,18 @@ ports on which the server should be listening. IRC operators of this
 server are defined in
 .I [Operator]
 blocks.
+.I [Features]
+can be used to disable compile-time features at run time, e.g. if ngircd
+was built to support ident lookups, but you do not want ngircd to perform
+ident lookups you can disable them here.
+This section is optional.
 .I [Server]
 is the section where server links are configured. And
 .I [Channel]
 blocks are used to configure pre-defined ("persistent") IRC channels.
 .PP
 There can be more than one [Operator], [Server] and [Channel] sections
-per configuration file, but only one [Global] section.
+per configuration file, but only one [Global] and one [Features] section.
 .SH [GLOBAL]
 The
 .I [Global]
@@ -205,29 +210,6 @@ you do not want to have channels other than those defined in
 [Channel] sections in the configuration file.
 Default: no.
 .TP
-\fBDNS\fR
-If set to false, ngIRCd will not make DNS lookups when clients connect.
-If you configure the daemon to connect to other servers, ngIRCd may still
-perform a DNS lookup if required.
-Default: yes.
-.TP
-\fBIdent\fR
-If ngIRCd is compiled with IDENT support this can be used to disable IDENT
-lookups at run time.
-Default: yes.
-.TP
-\fBPAM\fR
-If ngIRCd is compiled with PAM support this can be used to disable all calls
-to the PAM library at runtime; all users connecting without password are
-allowed to connect, all passwords given will fail.
-Default: yes.
-.TP
-\fBZeroConf\fR
-If ngIRCd is compiled to register its services using ZeroConf (e.g. using
-Howl, Avahi or on Mac OS X) this parameter can be used to disable service
-registration at runtime.
-Default: yes.
-.TP
 \fBConnectIPv4\fR
 Set this to no if you do not want ngIRCd to connect to other IRC servers using
 IPv4. This allows usage of ngIRCd in IPv6-only setups.
@@ -269,6 +251,33 @@ Password of the IRC operator.
 \fBMask\fR
 Mask that is to be checked before an /OPER for this account is accepted.
 Example: nick!ident@*.example.com
+.SH [FEATURES]
+An optional section that can be used to disable features at
+run-time. A feature is enabled by default if if ngircd was built with
+support for it.
+\fBDNS\fR
+If set to false, ngIRCd will not make DNS lookups when clients connect.
+If you configure the daemon to connect to other servers, ngIRCd may still
+perform a DNS lookup if required.
+Default: yes.
+.TP
+\fBIdent\fR
+If ngIRCd is compiled with IDENT support this can be used to disable IDENT
+lookups at run time.
+Default: yes.
+.TP
+\fBPAM\fR
+If ngIRCd is compiled with PAM support this can be used to disable all calls
+to the PAM library at runtime; all users connecting without password are
+allowed to connect, all passwords given will fail.
+Default: yes.
+.TP
+\fBZeroConf\fR
+If ngIRCd is compiled to register its services using ZeroConf (e.g. using
+Howl, Avahi or on Mac OS X) this parameter can be used to disable service
+registration at runtime.
+Default: yes.
+.TP
 .SH [SERVER]
 Other servers are configured in
 .I [Server]

src/ngircd/conf.c

@@ -62,6 +62,7 @@ static bool Read_Config PARAMS(( bool ngircd_starting ));
 static bool Validate_Config PARAMS(( bool TestOnly, bool Rehash ));
 
 static void Handle_GLOBAL PARAMS(( int Line, char *Var, char *Arg ));
+static void Handle_FEATURES PARAMS(( int Line, char *Var, char *Arg ));
 static void Handle_OPERATOR PARAMS(( int Line, char *Var, char *Arg ));
 static void Handle_SERVER PARAMS(( int Line, char *Var, char *Arg ));
 static void Handle_CHANNEL PARAMS(( int Line, char *Var, char *Arg ));
@@ -232,7 +233,7 @@ opers_free(void)
 {
 	struct Conf_Oper *op;
 	size_t len;
-	
+
 	len = array_length(&Conf_Opers, sizeof(*op));
 	op = array_start(&Conf_Opers);
 	while (len--) {
@@ -247,7 +248,7 @@ opers_puts(void)
 {
 	struct Conf_Oper *op;
 	size_t len;
-	
+
 	len = array_length(&Conf_Opers, sizeof(*op));
 	op = array_start(&Conf_Opers);
 	while (len--) {
@@ -341,11 +342,6 @@ Conf_Test( void )
 	printf("  OperServerMode = %s\n", yesno_to_str(Conf_OperServerMode));
 	printf("  AllowRemoteOper = %s\n", yesno_to_str(Conf_AllowRemoteOper));
 	printf("  PredefChannelsOnly = %s\n", yesno_to_str(Conf_PredefChannelsOnly));
-	printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
-	printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
-	printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
-	printf("  ZeroConf = %s\n", yesno_to_str(Conf_ZeroConf));
-
 #ifdef WANT_IPV6
 	printf("  ConnectIPv4 = %s\n", yesno_to_str(Conf_ConnectIPv6));
 	printf("  ConnectIPv6 = %s\n", yesno_to_str(Conf_ConnectIPv4));
@@ -355,6 +351,13 @@ Conf_Test( void )
 	printf("  MaxJoins = %d\n", Conf_MaxJoins > 0 ? Conf_MaxJoins : -1);
 	printf("  MaxNickLength = %u\n\n", Conf_MaxNickLength - 1);
 
+	puts("[FEATURES]");
+	printf("  DNS = %s\n", yesno_to_str(Conf_DNS));
+	printf("  Ident = %s\n", yesno_to_str(Conf_Ident));
+	printf("  PAM = %s\n", yesno_to_str(Conf_PAM));
+	printf("  ZeroConf = %s\n", yesno_to_str(Conf_ZeroConf));
+	puts("");
+
 	opers_puts();
 
 	for( i = 0; i < MAX_SERVERS; i++ ) {
@@ -818,6 +821,7 @@ Read_Config( bool ngircd_starting )
 		arg = ptr + 1; ngt_TrimStr( arg );
 
 		if( strcasecmp( section, "[GLOBAL]" ) == 0 ) Handle_GLOBAL( line, var, arg );
+		else if( strcasecmp( section, "[FEATURES]" ) == 0 ) Handle_FEATURES( line, var, arg );
 		else if( strcasecmp( section, "[OPERATOR]" ) == 0 ) Handle_OPERATOR( line, var, arg );
 		else if( strcasecmp( section, "[SERVER]" ) == 0 ) Handle_SERVER( line, var, arg );
 		else if( strcasecmp( section, "[CHANNEL]" ) == 0 ) Handle_CHANNEL( line, var, arg );
@@ -1117,7 +1121,7 @@ Handle_GLOBAL( int Line, char *Var, char *Arg )
 
 	if (CheckLegacyNoOption(Var, Arg)) {
 		Config_Error(LOG_WARNING, "%s, line %d: \"No\"-Prefix has been removed, use "
-				"\"%s = %s\" instead",
+				"\"%s = %s\" in [FEATURES] section instead",
 					NGIRCd_ConfFile, Line, NoNo(Var), InvertArg(Arg));
 		if (strcasecmp(Var, "NoIdent") == 0)
 			WarnIdent(Line);
@@ -1125,28 +1129,6 @@ Handle_GLOBAL( int Line, char *Var, char *Arg )
 			WarnPAM(Line);
 		return;
 	}
-	if( strcasecmp( Var, "DNS" ) == 0 ) {
-		/* do reverse dns lookups when clients connect? */
-		Conf_DNS = Check_ArgIsTrue( Arg );
-		return;
-	}
-	if (strcasecmp(Var, "Ident") == 0) {
-		/* do IDENT lookups when clients connect? */
-		Conf_Ident = Check_ArgIsTrue(Arg);
-		WarnIdent(Line);
-		return;
-	}
-	if(strcasecmp(Var, "PAM") == 0) {
-		/* use PAM library to authenticate users */
-		Conf_PAM = Check_ArgIsTrue(Arg);
-		WarnPAM(Line);
-		return;
-	}
-	if(strcasecmp(Var, "ZeroConf") == 0) {
-		/* register services using ZeroConf */
-		Conf_ZeroConf = Check_ArgIsTrue(Arg);
-		return;
-	}
 #ifdef WANT_IPV6
 	/* the default setting for all the WANT_IPV6 special options is 'true' */
 	if( strcasecmp( Var, "ConnectIPv6" ) == 0 ) {
@@ -1271,6 +1253,37 @@ Handle_GLOBAL( int Line, char *Var, char *Arg )
 } /* Handle_GLOBAL */
 
 
+static void
+Handle_FEATURES(int Line, char *Var, char *Arg)
+{
+	assert( Line > 0 );
+	assert( Var != NULL );
+	assert( Arg != NULL );
+
+	if( strcasecmp( Var, "DNS" ) == 0 ) {
+		/* do reverse dns lookups when clients connect? */
+		Conf_DNS = Check_ArgIsTrue( Arg );
+		return;
+	}
+	if (strcasecmp(Var, "Ident") == 0) {
+		/* do IDENT lookups when clients connect? */
+		Conf_Ident = Check_ArgIsTrue(Arg);
+		WarnIdent(Line);
+		return;
+	}
+	if(strcasecmp(Var, "PAM") == 0) {
+		/* use PAM library to authenticate users */
+		Conf_PAM = Check_ArgIsTrue(Arg);
+		WarnPAM(Line);
+		return;
+	}
+	if(strcasecmp(Var, "ZeroConf") == 0) {
+		/* register services using ZeroConf */
+		Conf_ZeroConf = Check_ArgIsTrue(Arg);
+		return;
+	}
+}
+
 static void
 Handle_OPERATOR( int Line, char *Var, char *Arg )
 {