The trouble with operators like "<", ">", etc. is that their meaning varies depending on your interpretation of the following string.
It may be that dpkg-ish version comparisons are the right way forward here, since they split strings and numbers according to a well-defined spec that is actually almost always want you want. It would mean that the following would work: start on cputemp TEMP<60 start on sysinit JOB>=S15 start on started apache VERSION>2.1-5ubuntu4 Scott On Tue, Mar 8, 2011 at 6:39 AM, Clint Byrum <cl...@fewbar.com> wrote: > Forwarding this to the upstream upstart project and marking > Triaged/Wishlist in Ubuntu. > > ** Also affects: upstart > Importance: Undecided > Status: New > > ** Summary changed: > > - support relation operators in env matches of start/stop conditions > + init: support relation operators in env matches of start/stop conditions > > ** Changed in: upstart (Ubuntu) > Status: New => Triaged > > ** Changed in: upstart (Ubuntu) > Importance: Undecided => Wishlist > > -- > You received this bug notification because you are a member of Upstart > Developers, which is subscribed to upstart . > https://bugs.launchpad.net/bugs/616575 > > Title: > init: support relation operators in env matches of start/stop > conditions > > Status in Upstart: > New > Status in “upstart” package in Ubuntu: > Triaged > > Bug description: > Binary package hint: upstart > > Adding support for relation operators in the start/stop on stanza will > benefit future upstart scripts. In particular it will help when > upstart's scope grows to encompass cron and udev style services. > > My particular use case: > a temperature monitoring daemon which emits events along the lines of > > initctl emit coretemp TEMP=37 > > A second daemon that starts/stops depending on the current > temperature. > > it could have a .conf file > > #cpu is too hot > start on cputemp TEMP>60 > stop on cputemp TEMP<50 > > respawn > exec cpu-is-too-hot > > > It is currently very unwieldy to produce the start/stop on stanzas with only > the equality comparisons. > > start on cputemp TEMP=[6789][0123456789] > stop on cputemp TEMP=[1234][0123456789] > These do not even cover all the cases. > > In general more powerful env matching syntax would help tremendously, > adding relation operators should just be a first step. > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/616575 Title: init: support relation operators in env matches of start/stop conditions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs