wm4 03c70a8d81 subprocess, lua: export whether the process was killed by us ...

We want to distinguish actual errors, and just aborting the program
intentionally.

Also be a bit more careful with handling the wait() exit status: do not
called WEXITSTATUS() without checking WIFEXITED() first.

2015-06-27 21:08:55 +02:00

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