(As in: is
it a general assumption that a service must inherit the usual 3 file
descriptors?)
 It is a POSIX requirement that command-line programs are run with
0, 1 and 2 open.
 Nevertheless, failing to address that requirement should not cause
malfunction in a program, so yes, it is a tcpserver bug.

 s6-tcpserver doesn't have this bug. :P

--
 Laurent

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