274 lines
9.1 KiB
C
274 lines
9.1 KiB
C
/****************************************************************************
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* nsh_main.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include "nsh.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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#define CONFIG_NSH_LINE_SIZE 80
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#undef CONFIG_FULL_PATH
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#define NSH_MAX_ARGUMENTS 6
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct cmdmap_s
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{
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const char *cmd; /* Name of the command */
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cmd_t handler; /* Function that handles the command */
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ubyte minargs; /* Minimum number of arguments (including command) */
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ubyte maxargs; /* Maximum number of arguments (including command) */
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const char *usage; /* Usage instructions for 'help' command */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static void cmd_help(int argc, char **argv);
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static void cmd_echo(int argc, char **argv);
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static void cmd_unrecognized(int argc, char **argv);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char line[CONFIG_NSH_LINE_SIZE];
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static const char delim[] = " \t\n";
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static const struct cmdmap_s g_cmdmap[] =
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{
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#if CONFIG_NFILE_DESCRIPTORS > 0
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{ "cat", cmd_cat, 2, 2, "<path>" },
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#endif
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{ "echo", cmd_echo, 2, 2, "<string>" },
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{ "exec", cmd_exec, 2, 3, "<hex-address>" },
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{ "help", cmd_help, 1, 1, NULL },
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#if CONFIG_NFILE_DESCRIPTORS > 0
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{ "ls", cmd_ls, 2, 5, "[-lRs] <path>" },
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#endif
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#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
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{ "mkdir", cmd_mkdir, 2, 2, "<path>" },
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{ "mount", cmd_mount, 4, 5, "-t <fstype> <device> <dir>" },
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#endif
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{ "ps", cmd_ps, 1, 1, NULL },
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#if !defined(CONFIG_DISABLE_MOUNTPOINT) && CONFIG_NFILE_DESCRIPTORS > 0
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{ "umount", cmd_umount, 2, 2, "<mountpoint-dir>" },
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#endif
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{ NULL, NULL, 1, 1, NULL }
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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const char g_fmtargrequired[] = "nsh: %s: missing required argument(s)\n";
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const char g_fmtarginvalid[] = "nsh: %s: argument invalid\n";
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const char g_fmtcmdnotfound[] = "nsh: %s: command not found\n";
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const char g_fmtcmdnotimpl[] = "nsh: %s: command not implemented\n";
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const char g_fmtnosuch[] = "nsh: %s: no such %s: %s\n";
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const char g_fmttoomanyargs[] = "nsh: %s: too many arguments\n";
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const char g_fmtcmdfailed[] = "nsh: %s: %s failed: %s\n";
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: cmd_echo
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****************************************************************************/
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static void cmd_echo(int argc, char **argv)
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{
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/* Echo the rest of the line */
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puts(argv[1]);
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}
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/****************************************************************************
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* Name: cmd_help
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****************************************************************************/
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static void cmd_help(int argc, char **argv)
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{
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const struct cmdmap_s *ptr;
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printf("NSH commands:\n");
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for (ptr = g_cmdmap; ptr->cmd; ptr++)
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{
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if (ptr->usage)
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{
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printf(" %s %s\n", ptr->cmd, ptr->usage);
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}
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else
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{
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printf(" %s\n", ptr->cmd);
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}
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}
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}
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/****************************************************************************
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* Name: cmd_unrecognized
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****************************************************************************/
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static void cmd_unrecognized(int argc, char **argv)
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{
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printf(g_fmtcmdnotfound, argv[0]);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: user_initialize
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****************************************************************************/
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void user_initialize(void)
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{
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/* stub */
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}
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/****************************************************************************
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* Name: user_start
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****************************************************************************/
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int user_start(int argc, char *argv[])
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{
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printf("NuttShell (NSH)\n");
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fflush(stdout);
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for (;;)
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{
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const struct cmdmap_s *cmdmap;
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char *saveptr;
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char *cmd;
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/* Get the next line of input */
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fgets(line, CONFIG_NSH_LINE_SIZE, stdin);
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/* Parse out the command at the beginning of the line */
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cmd = strtok_r(line, " \t\n", &saveptr);
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if (cmd)
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{
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cmd_t handler = cmd_unrecognized;
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/* Parse all of the arguments following the command name */
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char *cmd_argv[NSH_MAX_ARGUMENTS+1];
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int cmd_argc;
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cmd_argv[0] = cmd;
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for (cmd_argc = 1; cmd_argc < NSH_MAX_ARGUMENTS+1; cmd_argc++)
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{
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cmd_argv[cmd_argc] = strtok_r( NULL, " \t\n", &saveptr);
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if ( !cmd_argv[cmd_argc] )
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{
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break;
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}
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}
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if (cmd_argc > NSH_MAX_ARGUMENTS)
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{
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printf(g_fmttoomanyargs, cmd);
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}
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/* See if the command is one that we understand */
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for (cmdmap = g_cmdmap; cmdmap->cmd; cmdmap++)
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{
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if (strcmp(cmdmap->cmd, cmd) == 0)
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{
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/* Check if a valid number of arguments was provided. We
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* do this simple, imperfect checking here so that it does
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* not have to be performed in each command.
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*/
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if (cmd_argc < cmdmap->minargs)
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{
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/* Fewer than the minimum number were provided */
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printf(g_fmtargrequired, cmd);
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handler = NULL;
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break;
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}
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else if (cmd_argc > cmdmap->maxargs)
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{
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/* More than the maximum number were provided */
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printf(g_fmttoomanyargs, cmd);
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handler = NULL;
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break;
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}
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else
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{
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/* A valid number of arguments were provided (this does
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* not mean they are right.
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*/
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handler = cmdmap->handler;
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break;
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}
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}
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}
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/* If a error was detected above, handler will be nullified to
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* prevent reporting multiple errors.
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*/
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if (handler)
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{
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handler(cmd_argc, cmd_argv);
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}
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}
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fflush(stdout);
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}
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}
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