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<html>
<link rel="stylesheet" type="text/css" href="style.css">
<title>FAQ for ninit</title>
<body>
<div class="top">
<ul class="nav">
<li><a href="all.html">All files</a>
</ul>
<h1>FAQ for ninit</h1>
<div class="endtop"></div>
</div>
<!--
Useful srings for copy/paste
<table><td><a name=q2><font color=red>Q:</font></a><td><b>
</td><tr><td><td><b>
</b></td></table>
-->
<ul>
<li><a href="#q1">Why another init?</a></li>
<li><a href="#q2">What's the difference between minit and ninit?</a></li>
<li><a href="#q3">Your pidfilehack doesn't work with minit.</a></li>
<li><a href="#q4">Why do you split ninit in separate programs - ninit and helpers?</a></li>
<li><a href="#q5">Is there web interface for creating services?</a></li>
<li><a href="#q6">How about security? Is ninit reliable?</a></li>
<li><a href="#q7">Why documentation is in a separate file?</a></li>
<!--
<li><a href="#q8">There is a program env in package.
Why it is not installed?</a></li>
-->
<li><a href="#q9">Your documentation is bad!</a></li>
<!--
<li><a href="#q10">When I try to compile I receive:
"misc/tryprocess.c:2:20: error: unistd.h: No such file
or directory"</a></li>
-->
<li><a href="#q10a">Should I start the service sysvinit at boot time?</a></li>
<li><a href="#q11">Halt and reboot doesn't work clean with ninit.</a></li>
<li><a href="#q12">Which are the new files in <tt>ninit</tt>
which are missing in <tt>minit</tt>?</a></li>
<li><a href="#q13">Why my ninit uses more than 36k RAM?</a></li>
<li><a href="#q14">Why serdo doesn't start script in current dir?</a></li>
<li><a href="#q15">How to see which version I use?</a></li>
<li><a href="#qlast">How can I ask a new question?</a></li>
<!--
<li><a href="#q1"> </a></li>
11 - counter now.
-->
</ul>
<table><td><a name=q1><font color=red>Q:</font></a></a><td>
<b>Why another init?</b></td>
<tr><td><td>
Hm-mmm!
I offer <a href=guarantee.html>security</a> guarantee.
On my boxes ninit uses minimal resources - only 8K RAM.
I was looking for the name and my friend
Pencho Marinov suggested me: "Ninit is a good name
since it's small. The people will spell it <b>nano</b>-init!"
</td>
</table>
<table><td><a name=q2><font color=red>Q:</font></a><td><b>
What's the difference between
<a href=http://www.fefe.de/minit/>minit</a> and ninit?
</b></td><tr><td><td>
ninit is a fork from minit. On user level ninit support all
features of minit. There is one difference. Ninit doesn't
support unnamed pipes between a service and a log-service.
It does logging with named pipes. I decided to remove
unnamed pipes. This saves code.
<p>
Ninit create the links and named pipes for log services alone.
There is one restriction only. The service dir must be writable.
One have to start such services after mount, or create links
manually before starting the service. Example
<pre>
mkfifo -m 600 log/in
ln -s log/in out
</pre>
</td></table>
<table><td><a name=q3><font color=red>Q:</font></a><td><b>
Your pidfilehack doesn't work with
<a href=http://www.fefe.de/minit/>minit</a>.
</b></td><tr><td><td>
In recent versions I decided to rename pidfilehack to
<a href=man/pidfile.man>ninit-pidfile</a>.
With ninit you can prepare a service and if it forks and
writes the PID
in some file then type in the service directory:
<pre>
echo /path/to/deamon.pidfile > pidfile
</pre>
<!--
If you have running minit do before reboot
<pre>
OAcd /etc/ninit && rm -f in out
ln /etc/minit/in in
ln /etc/minit/out out
</pre>
Above checks are included in version 0.12-pre.
See misc/update_pipes.sh there.
<p>
The problem is: my pidfilehack and nsvc have hard-coded
/etc/ninit/{in|out} pipes. After above links are made
ninit's pidfilehack will work with minit also.
-->
</td></table>
<table><td><a name=q4><font color=red>Q:</font></a><td><b>
Why do you split ninit in separate programs -- ninit and helpers?
</b></td><tr><td><td>
I have to write a separate page for this question.
</td></table>
<table><td><a name=q5><font color=red>Q:</font></a><td><b>
Is there web interface for creating services?
</b></td><tr><td><td>
Not yet. Who do this?
</td></table>
<table><td><a name=q6><font color=red>Q:</font></a><td><b>
How about security? Is ninit reliable?
</b></td><tr><td><td>
I wrote all following Daniel
<a href=http://cr.yp.to>Bernstein</a>
and Felix von
<a href=http://www.fefe.de/>Leitner</a>.
I'm not so great like them, bath I try to
write similar code to their.
Since I believe that the programs are secure ninit comes
with a <a href=guarantee.html>guarantee</a>.
</td></table>
<table><td><a name=q7><font color=red>Q:</font></a><td><b>
Why documentation is in a separate file?
</b></td><tr><td><td>
So I can change and keep it up to date easy.
You can also install
<a href=ninit-html.tar.bz2>HTML-docs</a>
on your box. They are public.
</td></table>
<!--
<table><td><a name=q8><font color=red>Q:</font></a><td><b>
There is a program env in package. Why it is not installed?
</b></td><tr><td><td>
It does the same as /bin/env from core utils. My is small and
works with less RAM on my box. If you want use it. If you want
to change the environ of some service use the file
service/environ or this env.
<pre>
mkdir /etc/ninit/bin
cp ./env /etc/ninit/bin
</pre>
</td></table>
-->
<table><td><a name=q9><font color=red>Q:</font></a><td><b>
Your documentation is bad!
</b></td><tr><td><td>
I know. May be you will help to make it better.
See also
<a href=man/README>this</a>.
</td></table>
<!--
<table><td><a name=q10><font color=red>Q:</font></a><td><b>
When I try to compile I receive: <br>"misc/tryprocess.c:2:20: error:
unistd.h: No such file or directory"</b></td><tr><td><td>
You haven't install headers files of C libraries.
Try first to build next program:
<pre>
#include <unistd.h>
int main() { write(1, "I like C\n", 9); return 0; }
</pre>
</td></table>
-->
<table><td><a name=q10a><font color=red>Q:</font></a><td><b>
Should I start the service sysvinit at boot time?
</b></td><tr><td><td>
No! Five minutes after boot time ninit try to start
this service. If such service exists it open the fifo
<tt>/dev/initctl</tt>. If there is any activity
on the fifo it invokes the emulator
<a href=man/sysvinit.man>ninit-sysvinit</a>.
If you don't plan to start the commands
<tt>halt, reboot, shutdown, telinit</tt>, then you can do:
<pre>
cd /etc/ninit
mv sysvinit sysvinit_
nsvc -o update
</pre>
Some scripts in <tt>/etc/init.d/</tt> uses the above sysvinit commands.
</td></table>
<table><td><a name=q11><font color=red>Q:</font></a><td><b>
Halt and reboot doesn't work clean with ninit.
</b></td><tr><td><td>
How to stop the system running ninit see
<a href=ninit.html#HaltReboot>here</a>.
If you have a servive <b>sysvinit</b> then
all must be fine. See also
<a href=man/sysvinit.man>ninit-sysvinit</a>.
<p>
If you have again problems with
<tt>nsvc -o {halt|reboot|_l0|_l6}</tt>
the problem is probably
<tt>init.d/halt</tt> script.
For example on FEDORA last script ends with:
<pre>
[ -n "$kexec_command" ] && $kexec_command -e >& /dev/null
HALTARGS="-i -d"
[ -f /poweroff -o ! -f /halt ] && HALTARGS="$HALTARGS -p"
exec $command $HALTARGS
</pre>
You have to include the following lines before the text above.
<pre>
if [ -n "$NINIT_RUNLEVEL" ] ; then
# use ninit-reboot instead of halt|reboot|poweroff
NINIT_HALT=HALT
[ -f /poweroff -o ! -f /halt ] && NINIT_HALT=POWER_OFF
[ "$command" = "/sbin/reboot" ] && NINIT_HALT=RESTART
exec /sbin/ninit-reboot $NINIT_HALT
fi
</pre>
See also the manpages halt(8), poweroff(8), reboot(8),
<a href=man/reboot.man>ninit-reboot</a> and
<a href=man/sysvinit.man>ninit-sysvinit</a>.
The commands
<tt>halt, reboot, poweroff</tt> belongs to the
<a href=ftp://ftp.cistron.nl/pub/people/miquels/sysvinit/>sysvinit</a>
package.
<!--
<p>
After version ninit-0.11 the converter
<a href=man/inittab.man>ninit-inittab</a> sets also
the <a href="files.html#Environ">environ</a> variable
NINIT_RUNLEVEL.
-->
</td></table>
<table><td><a name=q12><font color=red>Q:</font></a><td><b>
Which are the new files in <tt>ninit</tt>
which are missing in <tt>minit</tt>?
</b></td><tr><td><td>
They are:
<a href="files.html#Environ">environ</a>,
<a href="files.html#Wait">wait</a>,
<a href="files.html#Maxwait">maixwait</a>,
<a href="files.html#Softlimit">softlimit</a>,
<a href="files.html#Sleep">sleep</a>,
<a href="files.html#End">end</a>,
<a href="files.html#Uid">uid</a>,
<a href="files.html#Setup">setup</a>,
<a href="files.html#Rsetup">rsetup</a>,
<a href="files.html#Sys-rsetup">sys-rsetup</a>,
<a href="files.html#Pidfile">pidfile</a>,
<a href="files.html#Alarm">alarm</a>,
<a href="files.html#Pause">pause</a>,
<a href="files.html#Pause-wait">pause-wait</a>,
<a href="files.html#Cron">cron</a>.
Ninit start services using the helper programs
from <tt>/etc/ninit/<a href=man/run.html>sys/</a></tt>
dierctory. It aslo have
<a href=man/sysvinit.man>sysvinit</a> emulator.
</td></table>
<table><td><a name=q13><font color=red>Q:</font></a><td><b>
Why my ninit uses more than 36k RAM?
</b></td><tr><td><td>
You have build ninit with glibc. Read
<a href=install.html>here</a> how to make small static binaries.
</td></table>
<table><td><a name=q14><font color=red>Q:</font></a><td><b>
Why serdo doesn't start script in current dir?
</b></td><tr><td><td>
See my comments in serdo.c source after main. If you still
want uncomment one line there to support this feature.
It's not a <b>security whole</b>, but I personally find
it <b>too dangerous</b>.
</td></table>
<table><td><a name=q15><font color=red>Q:</font></a><td><b>
How to see which version I use?
</b></td><tr><td><td>
In the recent versions it's coded in the file
<tt>/etc/init/.sync</tt><br>
<tt>cat /etc/ninit/.sync</tt>
</td></table>
<table><td><a name=qlast><font color=red>Q:</font></a><td><b>
How can I ask a new question?
</b></td><tr><td><td>
Read first this file and documentation carefully.
Look also the package
<a href=README>README</a>.
<br>
There is a
mailing list
for ninit. To subscribe,
send an empty message
to <font size=+1><br> <a href=
mailto:ninit-subscribe@riemann.fmi.uni-sofia.bg
>
ninit-subscribe@riemann.fmi.uni-sofia.bg
</a></font>.
Some delay is posstible due to
<a href=http://en.wikipedia.org/wiki/Greylisting>
greylisting</a>.
Send me private emails
using <a href=/email.html>qform</a>.
</td></table>
<p>
Last updated: 15 Jan 2010
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
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Gratuitious blank lines added so that FAQ.html#link works.
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