From owner-freebsd-questions@FreeBSD.ORG  Wed Feb 20 12:40:14 2013
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Subject: sh script & files
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I noticed that when power fails I loose the contents of some files I am 
using in a sh script.

I read and write the file this way

file="/usr/local/etc/filename"

# read file
. "${file}"

# write to file
 > "${file}"

I'm thinking the file is never closed so on power failure I loose the 
contents of the file.

How would I code a command to close the file?

Thanks