496 lines
12 KiB
C
496 lines
12 KiB
C
/*
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* RT-Thread module shell implementation.
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*
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* COPYRIGHT (C) 2013, Shanghai Real-Thread Technology Co., Ltd
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*
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* This file is part of RT-Thread (http://www.rt-thread.org)
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* Maintainer: bernard.xiong <bernard.xiong at gmail.com>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2013-03-30 Bernard the first verion for finsh
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* 2014-01-03 Bernard msh can execute module.
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*/
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#include "msh.h"
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#include <finsh.h>
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#include <shell.h>
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#ifdef RT_USING_DFS
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#include <dfs_posix.h>
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#endif
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#define RT_FINSH_ARG_MAX 10
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typedef int (*cmd_function_t)(int argc, char** argv);
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#ifdef FINSH_USING_MSH
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#ifdef FINSH_USING_MSH_ONLY
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rt_bool_t msh_is_used(void)
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{
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return RT_TRUE;
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}
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#else
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#ifdef FINSH_USING_MSH_DEFAULT
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static rt_bool_t __msh_state = RT_TRUE;
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#else
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static rt_bool_t __msh_state = RT_FALSE;
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#endif
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rt_bool_t msh_is_used(void)
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{
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return __msh_state;
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}
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static int msh_exit(int argc, char** argv)
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{
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/* return to finsh shell mode */
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__msh_state = RT_FALSE;
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return 0;
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}
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FINSH_FUNCTION_EXPORT_ALIAS(msh_exit, __cmd_exit, return to RT-Thread shell mode.);
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static int msh_enter(void)
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{
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/* enter module shell mode */
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__msh_state = RT_TRUE;
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return 0;
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}
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FINSH_FUNCTION_EXPORT_ALIAS(msh_enter, msh, use module shell);
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#endif
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int msh_help(int argc, char** argv)
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{
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rt_kprintf("RT-Thread shell commands:\n");
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{
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struct finsh_syscall *index;
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for (index = _syscall_table_begin;
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index < _syscall_table_end;
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FINSH_NEXT_SYSCALL(index))
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{
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if (strncmp(index->name, "__cmd_", 6) != 0) continue;
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#if defined(FINSH_USING_DESCRIPTION) && defined(FINSH_USING_SYMTAB)
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rt_kprintf("%-16s - %s\n", &index->name[6], index->desc);
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#else
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rt_kprintf("%s ", &index->name[6]);
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#endif
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}
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}
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rt_kprintf("\n");
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return 0;
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}
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FINSH_FUNCTION_EXPORT_ALIAS(msh_help, __cmd_help, RT-Thread shell help.);
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static int msh_split(char* cmd, rt_size_t length, char* argv[RT_FINSH_ARG_MAX])
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{
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char *ptr;
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rt_size_t position;
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rt_size_t argc;
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ptr = cmd;
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position = 0; argc = 0;
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while (position < length)
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{
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/* strip bank and tab */
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while ((*ptr == ' ' || *ptr == '\t') && position < length)
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{
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*ptr = '\0';
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ptr ++; position ++;
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}
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if (position >= length) break;
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/* handle string */
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if (*ptr == '"')
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{
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ptr ++; position ++;
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argv[argc] = ptr; argc ++;
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/* skip this string */
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while (*ptr != '"' && position < length)
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{
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if (*ptr == '\\')
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{
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if (*(ptr + 1) == '"')
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{
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ptr ++; position ++;
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}
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}
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ptr ++; position ++;
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}
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if (position >= length) break;
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/* skip '"' */
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*ptr = '\0'; ptr ++; position ++;
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}
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else
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{
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argv[argc] = ptr;
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argc ++;
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while ((*ptr != ' ' && *ptr != '\t') && position < length)
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{
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ptr ++; position ++;
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}
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if (position >= length) break;
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}
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}
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return argc;
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}
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static cmd_function_t msh_get_cmd(char *cmd, int size)
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{
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struct finsh_syscall *index;
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cmd_function_t cmd_func = RT_NULL;
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for (index = _syscall_table_begin;
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index < _syscall_table_end;
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FINSH_NEXT_SYSCALL(index))
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{
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if (strncmp(index->name, "__cmd_", 6) != 0) continue;
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if (strncmp(&index->name[6], cmd, size) == 0 &&
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index->name[6 + size] == '\0')
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{
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cmd_func = (cmd_function_t)index->func;
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break;
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}
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}
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return cmd_func;
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}
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#if defined(RT_USING_MODULE) && defined(RT_USING_DFS)
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int msh_exec_module(char* cmd_line, int size)
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{
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int fd = -1;
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char *pg_name;
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int length, cmd_length = 0;
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if (size == 0) return -RT_ERROR; /* no command */
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/* get the length of command0 */
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while ((cmd_line[cmd_length] != ' ' && cmd_line[cmd_length] != '\t') && cmd_length < size)
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cmd_length ++;
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/* get name length */
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length = cmd_length + 32;
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/* allocate program name memory */
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pg_name = (char*) rt_malloc(length);
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if (pg_name == RT_NULL) return -RT_ENOMEM; /* no memory */
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/* copy command0 */
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memcpy(pg_name, cmd_line, cmd_length);
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pg_name[cmd_length] = '\0';
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if (strstr(pg_name, ".mo") != RT_NULL || strstr(pg_name, ".MO") != RT_NULL)
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{
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/* try to open program */
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if (fd < 0)
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{
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fd = open(pg_name, O_RDONLY, 0);
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}
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/* search in /bin path */
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if (fd < 0)
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{
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rt_snprintf(pg_name, length - 1, "/bin/%.*s", cmd_length, cmd_line);
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fd = open(pg_name, O_RDONLY, 0);
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}
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}
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else
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{
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/* add .mo and open program */
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/* try to open program */
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if (fd < 0)
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{
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strcat(pg_name, ".mo");
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fd = open(pg_name, O_RDONLY, 0);
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}
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/* search in /bin path */
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if (fd < 0)
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{
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rt_snprintf(pg_name, length - 1, "/bin/%.*s.mo", cmd_length, cmd_line);
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fd = open(pg_name, O_RDONLY, 0);
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}
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}
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if (fd >= 0)
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{
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/* found program */
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close(fd);
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rt_module_exec_cmd(pg_name, cmd_line, size);
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}
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else
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{
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rt_kprintf("%s: program not found.\n", cmd_line);
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}
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rt_free(pg_name);
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return 0;
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}
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#endif
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int msh_exec(char* cmd, rt_size_t length)
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{
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int argc;
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char *argv[RT_FINSH_ARG_MAX];
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int cmd0_size = 0;
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cmd_function_t cmd_func;
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/* strim the beginning of command */
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while(*cmd == ' ' || *cmd == '\t'){cmd++; length--;}
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/* find the size of first command */
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while ((cmd[cmd0_size] != ' ' && cmd[cmd0_size] != '\t') && cmd0_size < length)
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cmd0_size ++;
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if (cmd0_size == 0) return -1; /* no command found */
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/* try to get built-in command */
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cmd_func = msh_get_cmd(cmd, cmd0_size);
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if (cmd_func == RT_NULL)
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{
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#ifdef RT_USING_MODULE
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msh_exec_module(cmd, length);
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#else
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argv[0] = cmd;
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while(*cmd != ' ')
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{
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if (*cmd == 0) break;
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cmd++;
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}
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if (*cmd == ' ') *cmd = 0;
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rt_kprintf("%s: command not found.\n", argv[0]);
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#endif
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return -1;
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}
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/* split arguments */
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memset(argv, 0x00, sizeof(argv));
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argc = msh_split(cmd, length, argv);
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if (argc == 0) return -1;
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/* exec this command */
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return cmd_func(argc, argv);
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}
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static int str_common(const char *str1, const char *str2)
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{
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const char *str = str1;
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while ((*str != 0) && (*str2 != 0) && (*str == *str2))
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{
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str ++;
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str2 ++;
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}
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return (str - str1);
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}
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#ifdef RT_USING_DFS
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void msh_auto_complete_path(char *path)
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{
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DIR* dir;
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struct dirent *dirent;
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char *full_path, *ptr, *index;
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full_path = (char*)rt_malloc(256);
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if (full_path == RT_NULL) return; /* out of memory */
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ptr = full_path;
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if (*path != '/')
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{
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getcwd(full_path, 256);
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if (full_path[rt_strlen(full_path) - 1] != '/')
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strcat(full_path, "/");
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}
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else *full_path = '\0';
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index = RT_NULL; ptr = path;
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for (;;)
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{
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if (*ptr == '/') index = ptr + 1; if (!*ptr) break; ptr ++;
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}
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if (index == RT_NULL) index = path;
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if (index != RT_NULL)
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{
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char *dest = index;
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/* fill the parent path */
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ptr = full_path;
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while (*ptr) ptr ++;
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for (index = path; index != dest;)
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*ptr++ = *index++;
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*ptr = '\0';
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dir = opendir(full_path);
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if (dir == RT_NULL) /* open directory failed! */
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{
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rt_free(full_path);
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return;
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}
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/* restore the index position */
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index = dest;
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}
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/* auto complete the file or directory name */
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if (*index == '\0') /* display all of files and directories */
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{
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for (;;)
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{
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dirent = readdir(dir);
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if (dirent == RT_NULL) break;
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rt_kprintf("%s\n", dirent->d_name);
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}
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}
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else
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{
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int length, min_length;
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min_length = 0;
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for (;;)
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{
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dirent = readdir(dir);
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if (dirent == RT_NULL) break;
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/* matched the prefix string */
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if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0)
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{
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if (min_length == 0)
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{
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min_length = rt_strlen(dirent->d_name);
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/* save dirent name */
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strcpy(full_path, dirent->d_name);
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}
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length = str_common(dirent->d_name, full_path);
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if (length < min_length)
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{
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min_length = length;
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}
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}
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}
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if (min_length)
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{
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if (min_length < rt_strlen(full_path))
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{
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/* list the candidate */
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rewinddir(dir);
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for (;;)
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{
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dirent = readdir(dir);
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if (dirent == RT_NULL) break;
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if (strncmp(index, dirent->d_name, rt_strlen(index)) == 0)
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rt_kprintf("%s\n", dirent->d_name);
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}
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}
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length = index - path;
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memcpy(index, full_path, min_length);
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path[length + min_length] = '\0';
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}
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}
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closedir(dir);
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rt_free(full_path);
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}
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#endif
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void msh_auto_complete(char *prefix)
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{
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int length, min_length;
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const char *name_ptr, *cmd_name;
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struct finsh_syscall *index;
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min_length = 0;
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name_ptr = RT_NULL;
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if (*prefix == '\0')
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{
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msh_help(0, RT_NULL);
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return;
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}
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#ifdef RT_USING_DFS
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/* check whether a spare in the command */
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{
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char *ptr;
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ptr = prefix + rt_strlen(prefix);
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while (ptr != prefix)
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{
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if (*ptr == ' ')
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{
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msh_auto_complete_path(ptr + 1);
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break;
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}
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ptr --;
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}
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}
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#endif
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/* checks in internal command */
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{
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for (index = _syscall_table_begin; index < _syscall_table_end; FINSH_NEXT_SYSCALL(index))
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{
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/* skip finsh shell function */
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if (strncmp(index->name, "__cmd_", 6) != 0) continue;
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cmd_name = (const char*) &index->name[6];
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if (strncmp(prefix, cmd_name, strlen(prefix)) == 0)
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{
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if (min_length == 0)
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{
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/* set name_ptr */
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name_ptr = cmd_name;
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/* set initial length */
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min_length = strlen(name_ptr);
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}
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length = str_common(name_ptr, cmd_name);
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if (length < min_length)
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min_length = length;
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rt_kprintf("%s\n", cmd_name);
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}
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}
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}
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/* auto complete string */
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if (name_ptr != NULL)
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{
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rt_strncpy(prefix, name_ptr, min_length);
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}
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return ;
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}
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#endif
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