144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/*
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* Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <getopt.h>
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#include <readline/readline.h>
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#include <ipxe/command.h>
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#include <ipxe/parseopt.h>
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#include <ipxe/shell.h>
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#include <config/branding.h>
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/** @file
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*
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* Minimal command shell
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*
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*/
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/** The shell prompt string */
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static const char shell_prompt[] = PRODUCT_SHORT_NAME "> ";
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/**
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* "help" command
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*
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* @v argc Argument count
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* @v argv Argument list
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* @ret rc Return status code
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*/
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static int help_exec ( int argc __unused, char **argv __unused ) {
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struct command *command;
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unsigned int hpos = 0;
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printf ( "\nAvailable commands:\n\n" );
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for_each_table_entry ( command, COMMANDS ) {
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hpos += printf ( " %s", command->name );
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if ( hpos > ( 16 * 4 ) ) {
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printf ( "\n" );
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hpos = 0;
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} else {
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while ( hpos % 16 ) {
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printf ( " " );
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hpos++;
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}
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}
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}
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printf ( "\n\nType \"<command> --help\" for further information\n\n" );
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return 0;
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}
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/** "help" command */
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struct command help_command __command = {
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.name = "help",
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.exec = help_exec,
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};
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/**
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* Start command shell
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*
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*/
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int shell ( void ) {
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struct readline_history history;
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char *line;
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int rc = 0;
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/* Initialise shell history */
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memset ( &history, 0, sizeof ( history ) );
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/* Read and execute commands */
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do {
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readline_history ( shell_prompt, NULL, &history, &line );
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if ( line ) {
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rc = system ( line );
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free ( line );
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}
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} while ( ! shell_stopped ( SHELL_STOP_COMMAND_SEQUENCE ) );
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/* Discard shell history */
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history_free ( &history );
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return rc;
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}
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/** "shell" options */
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struct shell_options {};
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/** "shell" option list */
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static struct option_descriptor shell_opts[] = {};
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/** "shell" command descriptor */
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static struct command_descriptor shell_cmd =
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COMMAND_DESC ( struct shell_options, shell_opts, 0, 0, NULL );
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/**
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* "shell" command
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*
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* @v argc Argument count
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* @v argv Argument list
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* @ret rc Return status code
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*/
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static int shell_exec ( int argc, char **argv ) {
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struct shell_options opts;
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int rc;
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/* Parse options */
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if ( ( rc = parse_options ( argc, argv, &shell_cmd, &opts ) ) != 0 )
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return rc;
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/* Start shell */
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if ( ( rc = shell() ) != 0 )
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return rc;
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return 0;
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}
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/** "shell" command */
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struct command shell_command __command = {
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.name = "shell",
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.exec = shell_exec,
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};
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