glibc的手册包含实施外壳作业控制一些有用的信息：http://www.gnu.org/software/libc/manual/html_node/Implementing-a-Shell.html#Implementing-a-Shell

The glibc manual contains some useful info on implementing job control in the shell: http://www.gnu.org/software/libc/manual/html_node/Implementing-a-Shell.html#Implementing-a-Shell