flushing not always done on exit?

[Reini Urban]

Shaffer, Kenneth schrieb:
> To solve some weird "periodic" hangs where a script depends on the output
> of a previous portion of the script, I've had to insert "sync" command. My
> scripts use awk, sed, and grep, to name a few.
> 
> I haven't come up with a simple test case yet, but thought I'd raise a
> caution flag.

It would be interesting to repeat those hangs without, and then fixes 
with sync on cygwin, because sync on cygwin is a no-op. See the src.

Only explicit fsync(3) calls will help.
Or most likely a small sleep() will help. your sync just burned some 
cycles in spirit to sleep.

Filesystems are lazy, not just a windows fs.
-- 
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/

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