[OpenWrt-Devel] "Runlevel" support for procd

[John Crispin]

hi,

ok, please don't start coding yet. i need a couple of days to think
about this.

i'll let you know what we come up with as an idea. i really want to
avoid using the legacy runlevel pattern.

    John


On 29/07/2014 19:05, Matthias Schiffer wrote:
> Our Freifunk firmware framework Gluon [1] based on OpenWrt provides a
> special first-run wizard, the config mode/setup mode. In this mode,
> almost no normal services are started, and a minimal (failsafe-like)
> network configuration is used (via netifd's -c switch which was added by
> an earlier patch by me).
>
> In Attitude Adjustment, we did this through a very hacky init script
> which was ordered before S20network and just blocked forever to prevent
> the other init scripts from running.
>
> With procd, this hack doesn't work anymore, as procd will also block
> shutdown/reboot when an init script is still running. The possiblity to
> switch to an entirely different set of init scripts would allow us to
> implement the setup mode in a much saner way :D
>
> Of cource, we could also carry such patches downstream, but we're always
> interested in finding a common solution so others can benefit from our
> work :)
>
> [1] https://github.com/freifunk-gluon/gluon
>
>
>
> On 07/29/2014 05:59 PM, John Crispin wrote:
>> please explain the use case that this will solve.
>>
>> at the time of design we decided to not support run levels as we had no
>> valid uses cases that required run levels
>>
>>
>> On 29/07/2014 17:06, Matthias Schiffer wrote:
>>> Hi,
>>> I'd like to add a feature similar to runlevels to procd; I don't need
>>> switching at runtime though. So far my plan is to make the following
>>> three changes:
>>>
>>> * Allow reading sysinit initscipts from a different directory than
>>> /etc/rc.d (maybe by adding a third parameter to the runrc handler?)
>>>
>>> * Allow specifying an alternative inittab on the procd cmdline
>>>
>>> * Allow providing cmdline arguments for procd from preinit (through a
>>> file in /tmp like debug_level?)
>>>
>>> Any comments?
>>>
>>>
>>>
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>
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