On Sat, Oct 26, 2013 at 11:38 AM, Donn Cave
Question about the syscall trace -- in the second, threaded version,
[pid 11612] fcntl(7, F_SETLK, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}) = 0 ... [pid 11612] +++ exited with 0 +++
?? In the not threaded version, I don't see the child process exit - and wasn't expecting to, since it's supposed to have exec'd to /usr/bin/sleep.
You don't see it in the non-threaded one because the parent throws an exception while setting the lock and exits first. The sleep is only 5 seconds, so the second one reaches waitForProcess and collects it (note that the "parent: fail!" is a putStrLn, not an error) before exiting. -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net