在UNIX的高级编程中，第9.10节
"The POSIX.1 definition of an orphaned process group is one in which the
parent of every member is either itself a member of the group or is not
a member of the group's session. Another way of wording this is that the
process group is not orphaned as long as a process in the group has a
parent in a different process group but in the same session. "
它还说：
“如果进程组未成为孤儿，则可能存在其中一个 父级在不同的进程组中但在同一会话中将重新启动 进程组中未停止孤立的进程。“
所以，如果进程组是孤立的：
1）子进程及其父进程在同一进程组中
2）子进程及其父进程位于不同会话的不同进程组
我想知道当子进程在上述两种情况下停止时，父进程是否有可能重新启动其子进程。
由于