You can do simple locking by touching a file for the first instance and checking for it in other instances. In pseudo code:
while .lock exists do nothing or wait a bit end while touch .lock modify text file delete .lock Roy Souther wrote: > Is there anyway to do file locking in a bash script? I need to remove > the race hazard from a script that has multiple running instances per > user, each trying to make changes to a text file. I need to get > exclusive access to a file and make the other instances wait their turn. > > Any ideas? Flock is supported by more advances script engines like > Perl but flock seems to be beyond the ability of a simple shell like bash. > > _Royce Souther <mailto:[EMAIL PROTECTED]>_ > _www.SiliconTao.com <http://www.SiliconTao.com>_ > Let Open Source help your business move beyond. > > For security this message is digitally authenticated by _GnuPG > <http://www.gnupg.org>_. > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > clug-talk mailing list > [email protected] > http://clug.ca/mailman/listinfo/clug-talk_clug.ca > Mailing List Guidelines (http://clug.ca/ml_guidelines.php) > **Please remove these lines when replying _______________________________________________ clug-talk mailing list [email protected] http://clug.ca/mailman/listinfo/clug-talk_clug.ca Mailing List Guidelines (http://clug.ca/ml_guidelines.php) **Please remove these lines when replying
