linux环境下的cat命令部分功能的简单实现，可以实现输入命令的前台运行和后台运行两种方式。-linux environment, some functions of the cat command a simple implementation, the input commands can be running in the foreground and background to run in two ways.

linux下Cat 的简单C语言实现，模仿linuxcat程序-The C program like the cat in linux

在linux环境下 编写一个实现shell cat命令的函数-Environment in the linux shell cat command to write a function to achieve