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Article #979

Re: Sv: Serial port permission denied

#979
From: frank.damgaard
Date: Wed, 17 Nov 1999 00:00
42 lines
2075 bytes
Regin Ulf Nielsen <regin@post3.tele.dk> wrote:

> Pr�cist:

> "cu: open(/dev/ttyS1): Permission Denied
> cu: ttyS1: Line in use"

Et andet program anvender ttyS1, der er vel ikke Musen  der 
sidder p� ttyS1 ?  (=COM2)

>>2. Virker det som root ?
> nej

>>3. hvad siger "ls -l /dev/cua1" og "ls -l /dev/ttyS1" ?

> Giver svaret:

> "crw-------"

Jeg har :
crw-rw----   1 root     dialout    4,  65 nov 17 16:34 /dev/ttyS1

Og alle de der skal kunne anvende modem er med i gruppen "dialout".
Men da root heller ikke virker, s� er det et andet problem.

M�ske ogs� en lock-file, hvis f.eks. /var/lock/LCK..ttyS1 stadig
findes, s� vil andre programmer ikke kunne anvende porten.
(Jeg f�r pr�vis samme fejl hvis b�de minicom og derefter cu
 skal anvende porten, uden at minicom afsluttes)


s� hvis filen findes :

1)  cat /var/lock/LCK..ttyS1
     22159 minicom frank

Dvs. process med nummer 22159 anvender porten,
s� check med "ps xa | grep 22159" om processen stadig findes.
Hvis ikke s� slet filen, ellers s� afslut det program der anvender
porten.
-- 
mvh Frank Damgaard  | http://home3.inet.tele.dk/frda/
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From: frank.damgaard@no.spam
Subject: Re: Sv: Serial port permission denied
Date: 1999/11/17
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