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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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include <readline/readline.h>
#include <ipxe/command.h>
#include <ipxe/parseopt.h>
#include <ipxe/shell.h>
/** @file
*
* Minimal command shell
*
*/
/** The shell prompt string */
static const char shell_prompt[] = "iPXE> ";
/**
* "help" command
*
* @v argc Argument count
* @v argv Argument list
* @ret rc Return status code
*/
static int help_exec ( int argc __unused, char **argv __unused ) {
struct command *command;
unsigned int hpos = 0;
printf ( "\nAvailable commands:\n\n" );
for_each_table_entry ( command, COMMANDS ) {
hpos += printf ( " %s", command->name );
if ( hpos > ( 16 * 4 ) ) {
printf ( "\n" );
hpos = 0;
} else {
while ( hpos % 16 ) {
printf ( " " );
hpos++;
}
}
}
printf ( "\n\nType \"<command> --help\" for further information\n\n" );
return 0;
}
/** "help" command */
struct command help_command __command = {
.name = "help",
.exec = help_exec,
};
/**
* Start command shell
*
*/
int shell ( void ) {
struct readline_history history;
char *line;
int rc = 0;
/* Initialise shell history */
memset ( &history, 0, sizeof ( history ) );
/* Read and execute commands */
do {
readline_history ( shell_prompt, NULL, &history, &line );
if ( line ) {
rc = system ( line );
free ( line );
}
} while ( ! shell_stopped ( SHELL_STOP_COMMAND_SEQUENCE ) );
/* Discard shell history */
history_free ( &history );
return rc;
}
/** "shell" options */
struct shell_options {};
/** "shell" option list */
static struct option_descriptor shell_opts[] = {};
/** "shell" command descriptor */
static struct command_descriptor shell_cmd =
COMMAND_DESC ( struct shell_options, shell_opts, 0, 0, NULL );
/**
* "shell" command
*
* @v argc Argument count
* @v argv Argument list
* @ret rc Return status code
*/
static int shell_exec ( int argc, char **argv ) {
struct shell_options opts;
int rc;
/* Parse options */
if ( ( rc = parse_options ( argc, argv, &shell_cmd, &opts ) ) != 0 )
return rc;
/* Start shell */
if ( ( rc = shell() ) != 0 )
return rc;
return 0;
}
/** "shell" command */
struct command shell_command __command = {
.name = "shell",
.exec = shell_exec,
};
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