How to start a Server prog written in C (using sockets) to start at
bootup. I tried adding script to rc5.d? But the problem is that since
the server starts listening on a port( 5000) the OS freezes and then I
have to bootup in rescue mode to remove that script.

All the script does is runs a program calle server written in C.

In the script I have followed the start, stop status pattern followed
in other rc5.d scripts.

rajanyadav wrote:
> How to start a Server prog written in C (using sockets) to start at
> bootup. I tried adding script to rc5.d? But the problem is that since
> the server starts listening on a port( 5000) the OS freezes and then I
> have to bootup in rescue mode to remove that script.
>
> All the script does is runs a program calle server written in C.
>
> In the script I have followed the start, stop status pattern followed
> in other rc5.d scripts.



The scripts in the rc directories are set up for controlling
C programs which are specifically written to run as daemons.

You cannot start a simple terminal-oriented program and
assume that it behaves as a proper daemon.

For details, get e.g. the book

W Richard Stevens, Advanced Programming in the UNIX
Environment

and read the chapter on daemons (and all others referred
from it).

--

Tauno Voipio
tauno voipio (at) iki fi

I tried to make that program run as a daemon by using fork.
Lets say my server's name is server.
If I run it on terminal now I get the shell back and on doing ps -eaf
| grep ./server I can see the server is running
The I did this
Wrote a script called script.
I have attached it
Placed it in /etc/rc.d/init.c
cd /etc/rc5.d
ln -s /etc/rc.d/init.d/script S99script
ln -s /etc/rc.d/init.d/script K99script

Reboot

System hangs on blue screen before getting to login screen

Please advice what to do

Tauno Voipio wrote:
> rajanyadav wrote:
> > How to start a Server prog written in C (using sockets) to start at
> > bootup. I tried adding script to rc5.d? But the problem is that since
> > the server starts listening on a port( 5000) the OS freezes and then I
> > have to bootup in rescue mode to remove that script.
> >
> > All the script does is runs a program calle server written in C.
> >
> > In the script I have followed the start, stop status pattern followed
> > in other rc5.d scripts.
>
>
>
> The scripts in the rc directories are set up for controlling
> C programs which are specifically written to run as daemons.
>
> You cannot start a simple terminal-oriented program and
> assume that it behaves as a proper daemon.
>
> For details, get e.g. the book
>
> W Richard Stevens, Advanced Programming in the UNIX
> Environment
>
> and read the chapter on daemons (and all others referred
> from it).
>
> --
>
> Tauno Voipio
> tauno voipio (at) iki fi

> Tauno Voipio wrote:
>
>>rajanyadav wrote:
>>
>>>How to start a Server prog written in C (using sockets) to start at
>>>bootup. I tried adding script to rc5.d? But the problem is that since
>>>the server starts listening on a port( 5000) the OS freezes and then I
>>>have to bootup in rescue mode to remove that script.
>>>
>>>All the script does is runs a program calle server written in C.
>>>
>>>In the script I have followed the start, stop status pattern followed
>>>in other rc5.d scripts.
>>
>>
>>
>>The scripts in the rc directories are set up for controlling
>>C programs which are specifically written to run as daemons.
>>
>>You cannot start a simple terminal-oriented program and
>>assume that it behaves as a proper daemon.
>>
>>For details, get e.g. the book
>>
>> W Richard Stevens, Advanced Programming in the UNIX
>> Environment
>>
>>and read the chapter on daemons (and all others referred
>>from it).
>>

(-- top-posting corrected - tv --)

rajanyadav wrote:
> I tried to make that program run as a daemon by using fork.
> Lets say my server's name is server.
> If I run it on terminal now I get the shell back and on doing ps -eaf
> | grep ./server I can see the server is running
> The I did this
> Wrote a script called script.
> I have attached it
> Placed it in /etc/rc.d/init.c
> cd /etc/rc5.d
> ln -s /etc/rc.d/init.d/script S99script
> ln -s /etc/rc.d/init.d/script K99script
>
> Reboot
>
> System hangs on blue screen before getting to login screen
>
> Please advice what to do
>

Please get the reference and READ IT. It's not sufficient to
place a process simply into background by a fork()- You need
to handle with the process group and console affinities as well.

(You could learn to use Google: I got about 6 million hits
by 'linux daemon programming').

--

Tauno Voipio
tauno voipio (at) iki fi

Tauno Voipio wrote:
>> Tauno Voipio wrote:
>>
>>> rajanyadav wrote:
>>>
>>>> How to start a Server prog written in C (using sockets) to start at
>>>> bootup. I tried adding script to rc5.d? But the problem is that since
>>>> the server starts listening on a port( 5000) the OS freezes and then I
>>>> have to bootup in rescue mode to remove that script.
>>>>
>>>> All the script does is runs a program calle server written in C.
>>>>
>>>> In the script I have followed the start, stop status pattern followed
>>>> in other rc5.d scripts.
>>>
>>>
>>>
>>> The scripts in the rc directories are set up for controlling
>>> C programs which are specifically written to run as daemons.
>>>
>>> You cannot start a simple terminal-oriented program and
>>> assume that it behaves as a proper daemon.
>>>
>>> For details, get e.g. the book
>>>
>>> W Richard Stevens, Advanced Programming in the UNIX
>>> Environment
>>>
>>> and read the chapter on daemons (and all others referred
>>> from it).
>>>
>
> (-- top-posting corrected - tv --)
>
> rajanyadav wrote:
> > I tried to make that program run as a daemon by using fork.
> > Lets say my server's name is server.
> > If I run it on terminal now I get the shell back and on doing ps -eaf
> > | grep ./server I can see the server is running
> > The I did this
> > Wrote a script called script.
> > I have attached it
> > Placed it in /etc/rc.d/init.c
> > cd /etc/rc5.d
> > ln -s /etc/rc.d/init.d/script S99script
> > ln -s /etc/rc.d/init.d/script K99script
> >
> > Reboot
> >
> > System hangs on blue screen before getting to login screen
> >
> > Please advice what to do
> >
>
> Please get the reference and READ IT. It's not sufficient to
> place a process simply into background by a fork()- You need
> to handle with the process group and console affinities as well.
>

Try looking at the source of a really simple daemon program. I can;t
think of one right now...but...

> (You could learn to use Google: I got about 6 million hits
> by 'linux daemon programming').
>

Mmm;-)

In article <1157669466.17773.3@proxy01.news.clara.net>, a@b.c
(The Natural Philosopher) writes:

> Try looking at the source of a really simple daemon program. I can;t
> think of one right now...but...

http://www.erlenstar.demon.co.uk/unix/faq_toc.html contains a
description of the steps required to make your program run as
a daemon. This is the reference I successfully used when I
needed to do it myself.

--
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