:: Re: [DNG] Mini init script written …
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著者: Edward Bartolo
日付:  
To: Stephanie Daugherty
CC: dng
題目: Re: [DNG] Mini init script written in Perl boots.
Hi,

Thanks for taking some of your time to give me advice. I appreciate
such people who instead of flushing their anger in the mailing list on
innocent contributed remain positive to contribute tangibly.

I have been suggested to read books about Unix/Linux systems and the C
language. However, these were too expensive to buy. Before I actually
started to program in C, I found an introductory book about C that I
have still saved somewhere on my disk. It was written by Ciaran
O'Riordan titled: Learning GNU C. I remember I studied that book from
cover to cover. But I don't practice progamming every day and there is
that saying which goes, "If you don't use it, you lose it!" And that
is what happened.

So, I joined Devuan to contribute code. But, I am NOT appreciated, and
to be sincere, sometimes I even think about leaving the project
altogether. I am being denigrated just because I make a conscious
effort to write simple code. But this is being interpreted as a lack
of coding ability on my part. Therefore, I need to make a conscious
effort to complicate code as much as I can. Sadly, the world always
worked that way. Genuine people are cast away while malicious people
in all sectors of society prosper and move forward.

Edward

On 19/06/2016, Stephanie Daugherty <sdaugherty@???> wrote:
> When recovering from systermd-related breakage while first trying out
> Debian jesse, I ended up booting with init=/bin/bash a lot.
>
> You can rather easily bring up a fully functional system that way, at least
> for long enough to fire up a browser, find the problem, and then recover.
>
> My process for doing so was fairly simple.
> - boot into bash
> - remount / rw
> - mount the rest of the filesystems
> - start up udev (this was early in unstable or testing I think when it
> wasn't merged with systemd yet)
> - start up screen
> - bring up network interfaces
> - start up "important" system services (cron, syslog, and friends)
> - fire up a display manager (not strictly required, but easy enough to do,
> so why not)
>
> I'd suggest that this is a really good way to understand what's actually
> necessary to bring up the system, without writing a bit of cod, and
> reproducing the steps by hand provides the level of understanding that a
> sysadmin needs to have of init IMHO.
>
>
>
> On Sun, Jun 19, 2016 at 2:30 AM Edward Bartolo <edbarx@???> wrote:
>
>> Hi,
>>
>> System initialisation is NO religiously enshrined mystery that is
>> highly claimed to be beyond human comprehension. I can understand the
>> position help by anyone that an init is so central to an OS that it
>> must be coded scrupulously. And, given time, I think, I will
>> eventually come back with something that can be said to be a
>> functional and stable init.
>>
>> My current task if of trapping system wide events like requests for
>> shutdown and reboot. My init will be used to call various scripts or
>> executables depending on the type of event.
>>
>> Edward
>>
>> On 18/06/2016, Rainer Weikusat <rweikusat@???> wrote:
>> > Lars Noodén <lars.nooden@???> writes:
>> >> On 06/17/2016 09:36 PM, KatolaZ wrote:
>> >> [snip]
>> >>> Unfortunately, system initialisation is really a bit more complicated
>> >>> than that, whether you like it or not.
>> >> [snip]
>> >>
>> >> Is there a concise summary somewhere of what system initialization
>> >> entails? Or is it dependent on accumulated experience and not
>> >> codified?
>> >
>> > This depends heavily on what the system is supposed to do. Eg,
>> > something
>> > fairly specialized running a single application could just run the
>> > application as sole process instead of init. For something more
>> > general,
>> > there'll be a static initialization step which will usually include
>> > creating an initial filesystem namespace by mounting some set of
>> > filesystems (some virtual, eg, proc and sys, others residing on real
>> > devices) and my also include configuring some set of network
>> > interfaces. Afterwards, a set of programs performing various functions
>> > is started, eg, web server, name server, ssh server or so-called gettys
>> > enabling interactive logins without going over a network.
>> > _______________________________________________
>> > Dng mailing list
>> > Dng@???
>> > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
>> >
>> _______________________________________________
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>