flock

[ibjdt]

i find conflicting info on file locking.

is it better to use $LOCK_SH / $LOCK_EX / $LOCK_UN when reading and writing to a db or is it ok to use
flock(DB, 2); all the time and rely on close (DB); to unlock the db??

thanks.

 

[PaulTEG]

You don't really need to lock a file for reading, IMO, unless there's a ridiculous amount of updates.

You mention close (DB), I assume you're using flat files as a database, why not look into some of the perl modules, DB_File for example, and let the modules look after all the locking and stuff in the background

HTH

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[KevinADC]

I don't believe one is better than the other, but I have read from others that using $LOCK_SH / $LOCK_EX / $LOCK_UN is clearer to understand than using the numeric equivalents.