Combine command output along with the input

Question

I'd like to print command output along with its input. For example for such call as

echo "Hello world" | wc -c

I want the following output:

12,Hello world

Is there any way to do this using standard Unix (or GNU) tools?

Would be good to know if this is for a specific shell or if it should be shell agnostic. Some shells namely have good ways to deal with this. — ojs, Jan 10 '17 at 12:57

score 1 · Accepted Answer · answered Jan 10 '17 at 12:57

1

tee and paste solution:

echo "Hello world" | tee >(wc -c) | tac | paste -s -d, -
12,Hello world

answered Jan 10 '17 at 12:57

Petr Razumov

score 0 · Answer 2 · answered Jan 10 '17 at 12:44

0

A possibility (I think there should be better ones):

echo `echo "Hello world" | wc -c` ",Hello world" | sed 's/ ,/,/g'

answered Jan 10 '17 at 12:44

Zumo de Vidrio

2 Answers2