Tied NVO commands into the human-interactable settings code that I

completely forgot I'd written ages ago.

src/commandline/commands/nvo_cmd.c

 #include <command.h>
 #include <gpxe/nvo.h>
 #include <gpxe/dhcp.h>
+#include <gpxe/settings.h>
 
 void nvo_cmd_req() {}
 
 extern struct nvo_block *ugly_nvo_hack;
 
 static int show_exec ( int argc, char **argv ) {
+	struct config_context dummy_context;
+	char buf[256];
+	int rc;
 
 	if ( ! ugly_nvo_hack ) {
 		printf ( "No non-volatile option storage available\n" );
 		return 1;
 	}
 
-	hex_dump ( ugly_nvo_hack->options->data,
-		   ugly_nvo_hack->options->len );
+	if ( argc != 2 ) {
+		printf ( "Syntax: %s <identifier>\n", argv[0] );
+		return 1;
+	}
+
+	dummy_context.options = ugly_nvo_hack->options;
+	if ( ( rc = show_setting ( &dummy_context, argv[1], buf,
+				   sizeof ( buf ) ) ) != 0 ) {
+		printf ( "Could not find \"%s\": %s\n",
+			 argv[1], strerror ( -rc ) );
+		return 1;
+	}
+
+	printf ( "%s = %s\n", argv[1], buf );
+	return 0;
 }
 
 struct command show_command __command = {
 };
 
 static int set_exec ( int argc, char **argv ) {
-	unsigned long tag;
-	struct dhcp_option *option;
+	struct config_context dummy_context;
+	int rc;
 
 	if ( ! ugly_nvo_hack ) {
 		printf ( "No non-volatile option storage available\n" );
 	}
 
 	if ( argc != 3 ) {
-		printf ( "Syntax: %s <option number> <option string>\n",
+		printf ( "Syntax: %s <identifier> <value>\n",
 			 argv[0] );
 		return 1;
 	}
 
-	tag = strtoul ( argv[1], NULL, 0 );
-	option = set_dhcp_option ( ugly_nvo_hack->options, tag, argv[2],
-				   strlen ( argv[2] ) );
-	if ( ! option ) {
-		printf ( "Could not set option %ld\n", tag );
+	dummy_context.options = ugly_nvo_hack->options;
+	if ( ( rc = set_setting ( &dummy_context, argv[1], argv[2] ) ) != 0 ) {
+		printf ( "Could not set \"%s\"=\"%s\": %s\n",
+			 argv[1], argv[2], strerror ( -rc ) );
 		return 1;
 	}
-
+	
 	if ( nvo_save ( ugly_nvo_hack ) != 0 ) {
 		printf ( "Could not save options to non-volatile storage\n" );
 		return 1;

src/core/settings.c

  * @v len		Length of buffer
  * @ret rc		Return status code
  */
-int ( show_setting ) ( struct config_context *context, const char *name,
-		       char *buf, size_t len ) {
+int show_setting ( struct config_context *context, const char *name,
+		   char *buf, size_t len ) {
 	struct config_setting *setting;
 	struct config_setting tmp_setting;
 
  * @v value		Setting value (as a string)
  * @ret rc		Return status code
  */
-int ( set_setting ) ( struct config_context *context, const char *name,
-		      const char *value ) {
+int set_setting ( struct config_context *context, const char *name,
+		  const char *value ) {
 	struct config_setting *setting;
 	struct config_setting tmp_setting;
 
 
 	option = find_dhcp_option ( context->options, setting->tag );
 	if ( ! option )
-		return -ENOENT;
+		return -ENODATA;
 	dhcp_snprintf ( buf, len, option );
 	return 0;
 }
 
 	option = find_dhcp_option ( context->options, setting->tag );
 	if ( ! option )
-		return -ENOENT;
+		return -ENODATA;
 	dhcp_ipv4_option ( option, &ipv4 );
 	snprintf ( buf, len, inet_ntoa ( ipv4 ) );
 	return 0;
 };
 
 /** Some basic setting definitions */
-struct config_setting basic_config_settings[] __config_setting = {
-	{
-		.name = "hostname",
-		.tag = DHCP_HOST_NAME,
-		.type = &config_setting_type_string,
-	},
-	{
-		.name = "ip",
-		.tag = DHCP_EB_YIADDR,
-		.type = &config_setting_type_ipv4,
-	},
+struct config_setting ip_config_setting __config_setting = {
+	.name = "ip",
+	.tag = DHCP_EB_YIADDR,
+	.type = &config_setting_type_ipv4,
+};
+struct config_setting hostname_config_setting __config_setting = {
+	.name = "hostname",
+	.tag = DHCP_HOST_NAME,
+	.type = &config_setting_type_string,
+};
+struct config_setting username_config_setting __config_setting = {
+	.name = "username",
+	.tag = DHCP_EB_USERNAME,
+	.type = &config_setting_type_string,
+};
+struct config_setting password_config_setting __config_setting = {
+	.name = "password",
+	.tag = DHCP_EB_PASSWORD,
+	.type = &config_setting_type_string,
 };
-
-
-
-/* Quick and dirty proof of concept */
-int cmdl_show ( int argc, char **argv ) {
-	char buf[256];
-	struct config_context dummy_context = { NULL };
-	int rc;
-
-	if ( argc < 2 )
-		return -EINVAL;
-	
-	if ( ( rc = show_setting ( &dummy_context, argv[1],
-				   buf, sizeof ( buf ) ) ) != 0 )
-		return rc;
-
-	printf ( "%s = %s\n", argv[1], buf );
-	return 0;
-}
-

src/include/gpxe/settings.h

 
 /* Function prototypes */
 
-extern int ( show_setting ) ( struct config_context *context, const char *name,
-			      char *buf, size_t len );
-extern int ( set_setting ) ( struct config_context *context, const char *name,
-			     const char *value );
+extern int show_setting ( struct config_context *context, const char *name,
+			  char *buf, size_t len );
+extern int set_setting ( struct config_context *context, const char *name,
+			 const char *value );
 
 #endif /* _GPXE_SETTINGS_H */