简单shell的设计和实现

1）、除了系统调用execve，不允许使用其他的exec函数。输入应当允许带多个参数(一行内可以表示)，不考虑通配符 (即“*”、“?”等)的处理。

2）、输入错误命令能提示出错并进入下一轮接收命令状态。

3）、可以用Ctrl-C和Ctrl-\\结束简单shell的运行。

-simple shell of a Design and Implementation), in addition to system call execve. allowed to use other exec function. Importation should be allowed to bring a number of parameters (and his party can be said), without considering wildcards ("*"," "etc.) treatment. 2), order entry errors and mistakes can prompt access to a receiving order under the state. 3), you can use Ctrl-C and Ctrl-\\ end of the simple shell operation.