example, if the client receives a fatal signal of some kind from
its execution environment (eg its controlling terminal).
+ 10 - The per-request child wishes the server to check whether it is
+ still the uservd.
+
12 - The service failed onm the service side in an expected and
controlled manner, for example because it was rejected in the
configuration files.
internal error occurred. This can also occur if an attempt to
block signals using sigprocmask fails.
- 0-3,5-7,9-11,13-15,17-19 are not currently used.
+ 0-3,5-7,9,11,13-15,17-19 are not currently used by normal children.
REENTRANCY IN THE LIBC: