https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210538
Bug ID: 210538
Summary: [feature request] limit number of running instances in
crontab
Product: Base System
Version: 10.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Ensuring, only a single instance of a cron-job is running is a very common
requirement. Currently, our cron does not offer any help there -- people must
implement it in their programs/scripts. And it is usually done poorly...
anacron has a special switch -- `-s' -- which would ensure, _every_ job runs no
more than one instance at any time.
I think, we can do better by expanding crontab's syntax to allow specifying the
maximum number of each job's instances allowed.
I'd be happy to implement it, if the idea seems reasonable to someone with a
src-commit bit...
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