How can I use pipe

Shell Programming and Scripting
1

Hi, guys:

I am working on my shell using c. How can I use pipe to implement the following?

ls -l 1>> | grep hellp 1<< 2>> | less 2<<

(the output of ls goes to grep, and the output of grep goes to less)

Thanks

2

What are you asking?
What are you trying to accomplish with your command?
It would appear that some of your redirection is un-needed.