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exec redirect keeps file pointer

I have a script that includes

exec 1>> /var/log/unb/dblog.log

later logrotate renames the file to ...dblog.log.1 as expected but the script continues writing to the same file so the dblog.log.1 just gets bigger rather than starting to write to a new dblog.log as I expected. how can I get my expected behaviour
Nick Upson
Nick Upson
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2 Solutions
In your script put

trap 'exec $0' 1

To restart it if it gets a SIGHUP make sure you have a

pkill -HUP yourscript

in the appropriate file in /etc/logrotate.d
If the script takes no parameters, then it's otherwise

function huphandler { exec 1>>/var/log/unb/dblog.log; }
trap huphandler SIGHUP
#and initialize log

rest of script
Nick UpsonPrincipal Operations EngineerAuthor Commented:
The script runs in a loop with a sleep

do( 0 = 0 )
 sleep 90

could I just cause the "exec 1>>/var/log/unb/dblog.log" to be reexecuted every time round the loop to get the same effect
Yes. before <stuff> i guess.
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