int msh_exec(char *cmd, rt_size_t length)
{
int cmd_ret;
/* strim the beginning of command */
while (*cmd == ' ' || *cmd == '\t')
{
cmd++;
length--;
}
if (length == 0)
return 0;
/* Exec sequence:
* 1. built-in command
* 2. module(if enabled)
* 3. chdir to the directry(if possible)
*/
if (_msh_exec_cmd(cmd, length, &cmd_ret) == 0)
{
return cmd_ret;
}
#ifdef RT_USING_MODULE
if (msh_exec_module(cmd, length) == 0)
{
return 0;
}
#endif
#if defined(RT_USING_DFS) && defined(DFS_USING_WORKDIR)
if (msh_exec_script(cmd, length) == 0)
{
return 0;
}
/* change to this directory */
if (chdir(cmd) == 0)
{
return 0;
}
#endif
/* truncate the cmd at the first space. */
{
char *tcmd;
tcmd = cmd;
while (*tcmd != ' ' && *tcmd != '\0')
{
tcmd++;
}
*tcmd = '\0';
}
rt_kprintf("%s: command not found.\n", cmd);
return -1;
}
int msh_exec(char* cmd, rt_size_t length)
{
int argc;
char *argv[RT_FINSH_ARG_MAX];
int cmd0_size = 0;
cmd_function_t cmd_func;
/* strim the beginning of command */
while(*cmd == ' ' || *cmd == '\t'){cmd++; length--;}
/* find the size of first command */
while ((cmd[cmd0_size] != ' ' && cmd[cmd0_size] != '\t') && cmd0_size < length)
cmd0_size ++;
if (cmd0_size == 0) return -1; /* no command found */
/* try to get built-in command */
cmd_func = msh_get_cmd(cmd, cmd0_size);
if (cmd_func == RT_NULL)
{
#ifdef RT_USING_MODULE
msh_exec_module(cmd, length);
#else
argv[0] = cmd;
while(*cmd != ' ')
{
if (*cmd == 0) break;
cmd++;
}
if (*cmd == ' ') *cmd = 0;
rt_kprintf("%s: command not found.\n", argv[0]);
#endif
return -1;
}
/* split arguments */
memset(argv, 0x00, sizeof(argv));
argc = msh_split(cmd, length, argv);
if (argc == 0) return -1;
/* exec this command */
return cmd_func(argc, argv);
}
int system(const char *command)
{
return msh_exec_module(command, rt_strlen(command));
}
