后台进程可以在同一个shell中启动前台进程吗？(Can a background process launch a foreground process in the same shell?)

 在一个系统中： 
 
 
 
 前台进程 - 让我们调用这个进程Main() - 在xterm中运行启动后台进程Monitor() 
 
 
 通过数据库， Monitor()可以检测远程中断并杀死Main() 
 
 
 稍后，数据库可以指示Monitor() Main()使用不同的参数重新启动Main() 
 
 
 约束是： 
 
 
 
 Main()必须始终在前台运行，并且， 
 
 
 不允许启动新的xterm来启动Main() 
 
 
 那么问题是： 后台进程可以在同一个xterm / shell中启动一个新的前台进程吗？ 
 
 TCSH是首选，但Bash也是可以接受的。 

In a system:
 
 
 
A foreground process -- let's call this process Main() -- running in an xterm launches a background process Monitor()
 
 
Via a database, it is possible for Monitor() to detect a remote interrupt and kill Main()
 
 
At a later point, the database can instruct Monitor() to relaunch Main() with different parameters
 
 
The constraints are:
 
 
 
Main() must always run in the foreground, and,
 
 
Launching a new xterm to launch Main() is not allowed
 
 
The question, then, is: Can a background process launch a new foreground process in the same xterm/shell? 
 
TCSH is preferred, but Bash is also acceptable.

原文：https://stackoverflow.com/questions/26620955