s6-frontend
Software
skarnet.org
s6-frontend-helper-echo is a small utility to echo arguments to stdout. It is not meant to be called directly, although nothing bad will happen if you do. It is used in command lines crafted by s6 live status instead of the POSIX echo program, because implementations of echo are infamously inconsistent with regards to options and arguments starting with a dash, so it's better not to rely on them at all.
s6-frontend-helper-echo is basically a copy of s6-echo and behaves exactly the same. The program has been included in s6-frontend in order to avoid a dependency to s6-portable-utils.