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| #! /usr/bin/env ruby | |
| status = DATA.flock(File::LOCK_EX | File::LOCK_NB) | |
| if status == 0 | |
| puts "we have the lock..." | |
| sleep | |
| else | |
| puts "another process has the lock..." | |
| exit | |
| end | |
| __END__ | |
| ### this data section MUST be here for DATA.flock to function. | |
| ### the user locking the script MUST have write privledges to the script |
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Great idea! Just today I wrote a backup script and made use of this technique.