(echo foo ; sleep 1) | pee cat echo cat cat
Outputs just one foo here.
I'm quite sure the issue is that 'echo' close the stream immediately, causing a
SIGPIPE that kills the pee process.
The same problem happens when you want both head and tail of a large stream:
$ seq 100000 | pee 'head -n1' 'tail -n1'
1
14139
Adding empty signal handler for SIGPIPE
void handle_sig(int sig) {}
/* ... */
signal(SIGPIPE, handle_sig);
and simply ignoring the write error in pee.c fixes the head/tail case.
A workaround is
$ seq 100000 | pee 'head -n1; cat >/dev/null' 'tail -n1'
I'm sure there are cases where one wants the SIGPIPE to abort the rest of
pipes, but there should at least be an option to ignore it.
