Minimal shell implementation using readline() and system().

src/hci/shell.c

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+/*
+ * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <console.h>
+#include <readline/readline.h>
+#include <gpxe/command.h>
+#include <gpxe/shell.h>
+
+/** @file
+ *
+ * Minimal command shell
+ *
+ */
+
+static struct command commands[0] __table_start ( commands );
+static struct command commands_end[0] __table_end ( commands );
+
+/** The shell prompt string */
+static const char shell_prompt[] = "gPXE> ";
+
+/** Flag set in order to exit shell */
+static int exit_flag = 0;
+
+/** "exit" command body */
+static int exit_exec ( int argc __unused, char **argv __unused ) {
+	exit_flag = 1;
+	return 0;
+}
+
+/** "exit" command definition */
+struct command exit_command __command = {
+	.name = "exit",
+	.exec = exit_exec,
+};
+
+/** "help" command body */
+static int help_exec ( int argc __unused, char **argv __unused ) {
+	struct command *command;
+
+	printf ( "\nAvailable commands:\n\n" );
+	for ( command = commands ; command < commands_end ; command++ ) {
+		printf ( "  %s\n", command->name );
+	}
+	printf ( "\nType \"<command> --help\" for further information\n\n" );
+	return 0;
+}
+
+/** "help" command definition */
+struct command help_command __command = {
+	.name = "help",
+	.exec = help_exec,
+};
+
+/**
+ * Start command shell
+ *
+ */
+void shell ( void ) {
+	char *line;
+
+	exit_flag = 0;
+	while ( ! exit_flag ) {
+		line = readline ( shell_prompt );
+		if ( line ) {
+			system ( line );
+			free ( line );
+		}
+	}
+}

src/include/gpxe/shell.h

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+#ifndef _GPXE_SHELL_H
+#define _GPXE_SHELL_H
+
+/** @file
+ *
+ * Minimal command shell
+ *
+ */
+
+extern void shell ( void );
+
+#endif /* _GPXE_SHELL_H */