Added descriptive text for settings and setting types, and display it in

the option config UI.

src/core/settings.c

 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <byteswap.h>
 #include <errno.h>
 #include <assert.h>
 
 	for ( type = config_setting_types ; type < config_setting_types_end ;
 	      type++ ) {
-		if ( strcmp ( name, type->name ) == 0 )
+		if ( strcasecmp ( name, type->name ) == 0 )
 			return type;
 	}
 	return NULL;
 
 	for ( setting = config_settings ; setting < config_settings_end ;
 	      setting++ ) {
-		if ( strcmp ( name, setting->name ) == 0 )
+		if ( strcasecmp ( name, setting->name ) == 0 )
 			return setting;
 	}
 	return NULL;
 /** A string configuration setting */
 struct config_setting_type config_setting_type_string __config_setting_type = {
 	.name = "string",
+	.description = "Text string",
 	.show = show_string,
 	.set = set_string,
 };
 /** An IPv4 configuration setting */
 struct config_setting_type config_setting_type_ipv4 __config_setting_type = {
 	.name = "ipv4",
+	.description = "IPv4 address",
 	.show = show_ipv4,
 	.set = set_ipv4,
 };
 /** An 8-bit integer configuration setting */
 struct config_setting_type config_setting_type_int8 __config_setting_type = {
 	.name = "int8",
+	.description = "8-bit integer",
 	.show = show_int,
 	.set = set_int8,
 };
 /** Some basic setting definitions */
 struct config_setting ip_config_setting __config_setting = {
 	.name = "ip",
+	.description = "IP address of this machine (e.g. 192.168.0.1)",
 	.tag = DHCP_EB_YIADDR,
 	.type = &config_setting_type_ipv4,
 };
 struct config_setting hostname_config_setting __config_setting = {
 	.name = "hostname",
+	.description = "Host name of this machine",
 	.tag = DHCP_HOST_NAME,
 	.type = &config_setting_type_string,
 };
 struct config_setting username_config_setting __config_setting = {
 	.name = "username",
+	.description = "User name for authentication to servers",
 	.tag = DHCP_EB_USERNAME,
 	.type = &config_setting_type_string,
 };
 struct config_setting password_config_setting __config_setting = {
 	.name = "password",
+	.description = "Password for authentication to servers",
 	.tag = DHCP_EB_PASSWORD,
 	.type = &config_setting_type_string,
 };
 struct config_setting root_path_config_setting __config_setting = {
 	.name = "root-path",
+	.description = "NFS/iSCSI root path",
 	.tag = DHCP_ROOT_PATH,
 	.type = &config_setting_type_string,
 };
 struct config_setting priority_config_setting __config_setting = {
 	.name = "priority",
+	.description = "Priority of these options",
 	.tag = DHCP_EB_PRIORITY,
 	.type = &config_setting_type_int8,
 };

src/hci/tui/settings_ui.c

  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <stdarg.h>
 #include <unistd.h>
 #include <string.h>
 #include <curses.h>
 #define CPAIR_ALERT	4
 
 /* Screen layout */
+#define BANNER_ROW		1
 #define SETTINGS_LIST_ROW	3
 #define SETTINGS_LIST_COL	1
+#define INFO_ROW		20
 #define ALERT_ROW		20
 
 /** Layout of text within a setting widget */
 		       ( SETTINGS_LIST_ROW + index ), SETTINGS_LIST_COL );
 }
 
-static void alert ( const char *fmt, ... ) {
+/**
+ * Print message centred on specified row
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v args		printf() argument list
+ */
+static void vmsg ( unsigned int row, const char *fmt, va_list args ) {
 	char buf[COLS];
-	va_list args;
 	size_t len;
 
-	va_start ( args, fmt );
 	len = vsnprintf ( buf, sizeof ( buf ), fmt, args );
+	mvprintw ( row, ( ( COLS - len ) / 2 ), "%s", buf );
+}
+
+/**
+ * Print message centred on specified row
+ *
+ * @v row		Row
+ * @v fmt		printf() format string
+ * @v ..		printf() arguments
+ */
+static void msg ( unsigned int row, const char *fmt, ... ) {
+	va_list args;
+
+	va_start ( args, fmt );
+	vmsg ( row, fmt, args );
 	va_end ( args );
+}
+
+/**
+ * Clear message on specified row
+ *
+ * @v row		Row
+ */
+static void clearmsg ( unsigned int row ) {
+	move ( row, 0 );
+	clrtoeol();
+}
 
+/**
+ * Print alert message
+ *
+ * @v fmt		printf() format string
+ * @v args		printf() argument list
+ */
+static void valert ( const char *fmt, va_list args ) {
 	color_set ( CPAIR_ALERT, NULL );
-	mvprintw ( ALERT_ROW, ( ( COLS - len ) / 2 ), "%s", buf );
+	vmsg ( ALERT_ROW, fmt, args );
 	sleep ( 2 );
 	color_set ( CPAIR_NORMAL, NULL );
-	move ( ALERT_ROW, 0 );
-	clrtoeol();
+	clearmsg ( ALERT_ROW );
+}
+
+/**
+ * Print alert message
+ *
+ * @v fmt		printf() format string
+ * @v ...		printf() arguments
+ */
+static void alert ( const char *fmt, ... ) {
+	va_list args;
+
+	va_start ( args, fmt );
+	valert ( fmt, args );
+	va_end ( args );
 }
 
 static void main_loop ( struct config_context *context ) {
 
 	/* Print initial screen content */
 	color_set ( CPAIR_NORMAL, NULL );
+	attron ( A_BOLD );
+	msg ( BANNER_ROW, "gPXE option configuration console" );
+	attroff ( A_BOLD );
 	for ( i = ( NUM_SETTINGS - 1 ) ; i >= 0 ; i-- ) {
 		init_setting_index ( &widget, context, i );
 		draw_setting ( &widget );
 	}
 
 	while ( 1 ) {
+		/* Redraw information row */
+		clearmsg ( INFO_ROW );
+		msg ( INFO_ROW, "%s (%s) - %s", widget.setting->name,
+		      widget.setting->type->description,
+		      widget.setting->description );
+
 		/* Redraw current setting */
 		color_set ( ( widget.editing ? CPAIR_EDIT : CPAIR_SELECT ),
 			    NULL );
 	initscr();
 	start_color();
 	init_pair ( CPAIR_NORMAL, COLOR_WHITE, COLOR_BLUE );
-	init_pair ( CPAIR_SELECT, COLOR_BLACK, COLOR_WHITE );
+	init_pair ( CPAIR_SELECT, COLOR_WHITE, COLOR_RED );
 	init_pair ( CPAIR_EDIT, COLOR_BLACK, COLOR_CYAN );
 	init_pair ( CPAIR_ALERT, COLOR_WHITE, COLOR_RED );
 	color_set ( CPAIR_NORMAL, NULL );

src/include/gpxe/settings.h

 	 * This is the name exposed to the user (e.g. "string").
 	 */
 	const char *name;
+	/** Description */
+	const char *description;
 	/** Show value of setting
 	 *
 	 * @v context		Configuration context
 	 * dhcp-options(5)).
 	 */
 	const char *name;
+	/** Description */
+	const char *description;
 	/** DHCP option tag
 	 *
 	 * This is the DHCP tag used to identify the option in DHCP