write(1, "hi\n", 3hi
)                     = 3
write(1, "hello\n", 6)                  = -1 EPIPE (Broken pipe)
--- SIGPIPE {si_signo=SIGPIPE, si_code=SI_USER, si_pid=55, si_uid=0} ---
+++ killed by SIGPIPE +++
[1]+  Done                    dd status=none if=pipe count=1