Roland Mainz wrote: > David Powell wrote: >> Instead of elaborate counting logic to limit the number of >> iterations of your while loops, just use 'for i in `seq 1 3`; >> do...'. > > "seq" comes from the "SUNWgnu-coreutils" and requires a package > dependicy in this case.
Good point; seq may not be the greatest idea after all. >> ipf_get_lock is racy. A simpler and more robust lock file can be >> created by creating a lockfile.$newpid that contains $newpid and >> attempting to ln $IPF_LOCK to your lockfile. > > Erm... AFAIK the only portable way (portable across all types of > filesystems, including NFS and DFS) is to use the atomic nature of > "mkdir", e.g. use "mkdir" to create the lock and "rmdir" to release it, > if "mkdir" fails then spin at this lock in incremetally larger time > intervals (e.g 0.1, 0.2, 0.4, 0.8, 1.6 seconds etc.). In this case it only ever needs to work on tmpfs. Dave
