如何将终端输出镜像到没有shell命令的文件？

Question

I'm putting the finishing touches of a project, and have a bit of a dilemma. Once all the data is gathered and statistics calculated, the results are then printed to the screen. However, in the program, the user is given the option of saving all the output to a file. I'd like to print data to both the terminal and file with same formatting.

I considered doing a fork(), but this is all one process and the data output is done just before the program termination. If I fork, then the child process will start executing from the beginning, and implementing successfully would result in a not so minor rewrite of 500+ LOC.

I covered roughly this exact same topic last semester, but left my unix programming book at home and none of the examples I've found fit my needs.

Answer 1

考虑通过tee命令管道输出，该命令写入stdout和文件。