Function msh_exec

components/finsh/msh.c:541–614

int msh_exec(char *cmd, rt_size_t length)
{
    int cmd_ret = 0;

    /* strim the beginning of command */
    while ((length > 0) && (*cmd  == ' ' || *cmd == '\t'))
    {
        cmd++;
        length--;
    }

    if (length == 0)
        return 0;

    /* Exec sequence:
     * 1. built-in command
     * 2. module(if enabled)
     */
    if (_msh_exec_cmd(cmd, length, &cmd_ret) == 0)
    {
        if(cmd_ret < 0)
        {
            rt_kprintf("%s: command failed %d.\n", cmd, cmd_ret);
        }
        return cmd_ret;
    }
#ifdef DFS_USING_POSIX
#ifdef DFS_USING_WORKDIR
    if (msh_exec_script(cmd, length) == 0)
    {
        return 0;
    }
#endif

#ifdef RT_USING_MODULE
    if (msh_exec_module(cmd, length) == 0)
    {
        return 0;
    }
#endif /* RT_USING_MODULE */

#ifdef RT_USING_SMART
    /* exec from msh_exec , debug = 0*/
    /* _msh_exec_lwp return is pid , <= 0 means failed */
    cmd_ret = _msh_exec_lwp(0, cmd, length);
    if (cmd_ret > 0)
    {
        return 0;
    }
#endif /* RT_USING_SMART */
#endif /* DFS_USING_POSIX */

    /* truncate the cmd at the first space. */
    {
        char *tcmd;
        tcmd = cmd;
        while (*tcmd != ' ' && *tcmd != '\0')
        {