serial device access from welcome script

serial device access from welcome script

[Thilo Riessner]

From a program called by the welcome script which tries to access the serial 
port (in this case /dev/ttyI0) I get the errormessage:
	Port or socket open error!
I guess, that the serial port is blocked by the pppd.
Is there any possibility to access the serial port nevertheless?
Thanks for any help

Thilo

serial device access from welcome script

[Thilo Riessner]

From a program called by the welcome script which tries to access the serial 
port (in this case /dev/ttyI0) I get the errormessage:
        Port or socket open error!
I guess, that the serial port is blocked by the pppd.
Is there any possibility to access the serial port nevertheless?
Thanks for any help

Thilo

Re: serial device access from welcome script

[James Carlson]

Thilo Riessner writes:
> >From a program called by the welcome script which tries to access the serial 
> port (in this case /dev/ttyI0) I get the errormessage:
>         Port or socket open error!
> I guess, that the serial port is blocked by the pppd.
> Is there any possibility to access the serial port nevertheless?

You shouldn't be trying to access the port directly.  Instead, when
the "welcome" script runs, your script's standard input and standard
output are connected directly to the tty.

You should be able to use 'read' and 'echo' (or whatever your
scripting language supports) without having to open anything.

This is true for "connect", "disconnect", "init", and "pty" as well.

-- 
James Carlson         42.703N 71.076W         <carlsonj@workingcode.com>

Re: serial device access from welcome script

[Pieter Loubser]

Have you removed the "lock" option from your ppp options file
(/etc/ppp/options)?



> >From a program called by the welcome script which tries to access the serial 
> port (in this case /dev/ttyI0) I get the errormessage:
> 	Port or socket open error!
> I guess, that the serial port is blocked by the pppd.
> Is there any possibility to access the serial port nevertheless?
> Thanks for any help
> 
> Thilo
> -
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> the body of a message to majordomo@vger.kernel.org
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Re: serial device access from welcome script

[James Carlson]

Pieter Loubser writes:
> 
> Have you removed the "lock" option from your ppp options file
> (/etc/ppp/options)?

The "lock" option only creates UUCP advisory lock files; it doesn't
actually prevent access to the serial port.

-- 
James Carlson         42.703N 71.076W         <carlsonj@workingcode.com>

Re: serial device access from welcome script

[Thilo Riessner]

Am Mittwoch, 6. September 2006 23:53 schrieben Sie:
> Thilo Riessner writes:
> > >From a program called by the welcome script which tries to access the
> > > serial
> >
> > port (in this case /dev/ttyI0) I get the errormessage:
> >         Port or socket open error!
> > I guess, that the serial port is blocked by the pppd.
> > Is there any possibility to access the serial port nevertheless?
>
> You shouldn't be trying to access the port directly.  Instead, when
> the "welcome" script runs, your script's standard input and standard
> output are connected directly to the tty.
>
> You should be able to use 'read' and 'echo' (or whatever your
> scripting language supports) without having to open anything.
>
> This is true for "connect", "disconnect", "init", and "pty" as well.
Thanks for your hint, but I have the problem, that the program (which is a 
binary program) I am running out of my welcome script (which is a bash 
script) does not support the usage of stdin and stdout, but it demands the 
usage of a device for reading and writing. Is there a trick that I could use 
in the  welcome script to  redirect stdin and stdout to a "device" and use 
that device in the program, which is called from the welcome script.

Re: serial device access from welcome script

[Christopher Fowler]

Use the files /dev/stdin and /dev/stdout

On Thu, 2006-09-07 at 16:44 +0200, Thilo Riessner wrote:
> Am Mittwoch, 6. September 2006 23:53 schrieben Sie:
> > Thilo Riessner writes:
> > > >From a program called by the welcome script which tries to access the
> > > > serial
> > >
> > > port (in this case /dev/ttyI0) I get the errormessage:
> > >         Port or socket open error!
> > > I guess, that the serial port is blocked by the pppd.
> > > Is there any possibility to access the serial port nevertheless?
> >
> > You shouldn't be trying to access the port directly.  Instead, when
> > the "welcome" script runs, your script's standard input and standard
> > output are connected directly to the tty.
> >
> > You should be able to use 'read' and 'echo' (or whatever your
> > scripting language supports) without having to open anything.
> >
> > This is true for "connect", "disconnect", "init", and "pty" as well.
> Thanks for your hint, but I have the problem, that the program (which is a 
> binary program) I am running out of my welcome script (which is a bash 
> script) does not support the usage of stdin and stdout, but it demands the 
> usage of a device for reading and writing. Is there a trick that I could use 
> in the  welcome script to  redirect stdin and stdout to a "device" and use 
> that device in the program, which is called from the welcome script.
> -
> To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: serial device access from welcome script

[Thilo Riessner]

The program needs one device for reading and writing. Therefore the /dev/stdin 
and /dev/stdout is not usable. Or do I get something wrong there?


> Use the files /dev/stdin and /dev/stdout
>
> On Thu, 2006-09-07 at 16:44 +0200, Thilo Riessner wrote:
> > Am Mittwoch, 6. September 2006 23:53 schrieben Sie:
> > > Thilo Riessner writes:
> > > > >From a program called by the welcome script which tries to access
> > > > > the serial
> > > >
> > > > port (in this case /dev/ttyI0) I get the errormessage:
> > > >         Port or socket open error!
> > > > I guess, that the serial port is blocked by the pppd.
> > > > Is there any possibility to access the serial port nevertheless?
> > >
> > > You shouldn't be trying to access the port directly.  Instead, when
> > > the "welcome" script runs, your script's standard input and standard
> > > output are connected directly to the tty.
> > >
> > > You should be able to use 'read' and 'echo' (or whatever your
> > > scripting language supports) without having to open anything.
> > >
> > > This is true for "connect", "disconnect", "init", and "pty" as well.
> >
> > Thanks for your hint, but I have the problem, that the program (which is
> > a binary program) I am running out of my welcome script (which is a bash
> > script) does not support the usage of stdin and stdout, but it demands
> > the usage of a device for reading and writing. Is there a trick that I
> > could use in the  welcome script to  redirect stdin and stdout to a
> > "device" and use that device in the program, which is called from the
> > welcome script. -
> > To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
> the body of a message to majordomo@vger.kernel.org
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Re: serial device access from welcome script

[Bill Unruh]

On Wed, 13 Sep 2006, Thilo Riessner wrote:

> The program needs one device for reading and writing. Therefore the /dev/stdin
> and /dev/stdout is not usable. Or do I get something wrong there?
>

???? reading=/dev/stdin, writing=/dev/stdout. ???

Also a device or whatever can in general be opened for both reading and
writing.


>
>> Use the files /dev/stdin and /dev/stdout
>>
>> On Thu, 2006-09-07 at 16:44 +0200, Thilo Riessner wrote:
>>> Am Mittwoch, 6. September 2006 23:53 schrieben Sie:
>>>> Thilo Riessner writes:
>>>>>> From a program called by the welcome script which tries to access
>>>>>> the serial
>>>>>
>>>>> port (in this case /dev/ttyI0) I get the errormessage:
>>>>>         Port or socket open error!
>>>>> I guess, that the serial port is blocked by the pppd.
>>>>> Is there any possibility to access the serial port nevertheless?
>>>>
>>>> You shouldn't be trying to access the port directly.  Instead, when
>>>> the "welcome" script runs, your script's standard input and standard
>>>> output are connected directly to the tty.
>>>>
>>>> You should be able to use 'read' and 'echo' (or whatever your
>>>> scripting language supports) without having to open anything.
>>>>
>>>> This is true for "connect", "disconnect", "init", and "pty" as well.
>>>
>>> Thanks for your hint, but I have the problem, that the program (which is
>>> a binary program) I am running out of my welcome script (which is a bash
>>> script) does not support the usage of stdin and stdout, but it demands
>>> the usage of a device for reading and writing. Is there a trick that I
>>> could use in the  welcome script to  redirect stdin and stdout to a
>>> "device" and use that device in the program, which is called from the
>>> welcome script. -
>>> To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>