Inconsistent shell behavior involving endline characters

Question

Why does:

[ "a" != "$(printf "\na")" ] && echo true || echo false

print true while:

[ "a" != "$(printf "\n")a" ] && echo true || echo false

print false?

Why does shell Command Substitution gobble up a trailing newline char? (and some others about the same thing) — ilkkachu, Jan 27 '18 at 23:14

score 1 · Accepted Answer · answered Jan 28 '18 at 02:55

1

I think it is because $(...). That substitution automatically remove ending newline character. That's a good default behaviour.

answered Jan 28 '18 at 02:55

Bach Lien

1 Answers1