Using flock in bash blocks

[Martin Langhoff]

Advanced bash/shell scripting question - I cannot seem to do the
correct incantation with /usr/bin/flock to make it work in a bash
block. Can any Master of the Bash give me a hint?

In other words, I am trying to put into to use the example in man
flock, where it says:'second form is convenient inside shell scripts'.


 # this does what I expect, and if I attempt
 # to obtain a second lock it fails
 $ flock -n /tmp/lockmyprecious sleep 60

 # this does not seem to work
 $ (flock -n 200; echo gotlock; sleep 60)200>/tmp/lockmyprecious

There is a bash script where I want to wrap a lock around a large-ish
code block that I don't want to split off to a separate script.

hints?


m
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