Bug #16775 for Device-ParallelPort-drv-linux: $this->{DATA}{DEVICE} is not filled

Wed Dec 28 16:37:41 2005 JACOB [...] cpan.org - Ticket created

Subject:

$this->{DATA}{DEVICE} is not filled

The module uses $this->{DATA}{DEVICE} as device name, however this variable is never filled. Not too severe, because the C part ignores the device parameter and accesses port 0 only.

Wed Dec 28 19:15:58 2005 scottp [...] dd.com.au - Correspondence added

From:	Scott Penrose <scottp [...] dd.com.au>
Subject:	Re: [cpan #16775] $this->{DATA}{DEVICE} is not filled
Date:	Thu, 29 Dec 2005 11:14:10 +1100
To:	bug-Device-ParallelPort-drv-linux [...] rt.cpan.org
RT-Send-Cc:

I will check it out. But there is an interaction between the DRV and normal versions. But I will check it out. Thanks Scott On 29/12/2005, at 8:37, via RT wrote: Show quoted text

> > This message about Device-ParallelPort-drv-linux was sent to you by > JACOB <JACOB@cpan.org> via rt.cpan.org > > Full context and any attached attachments can be found at: > <URL: https://rt.cpan.org/Ticket/Display.html?id=16775 > > > The module uses $this->{DATA}{DEVICE} as device name, however this > variable is never filled. Not too severe, because the C part > ignores the device parameter and accesses port 0 only.

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Wed Aug 12 07:05:57 2009 vlatko.kosturjak [...] gmail.com - Correspondence added

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vlatko.kosturjak [...] gmail.com

I got same problem. $this->{DATA}{DEVICE} is not filled. So, I get this: Use of uninitialized value in subroutine entry at /usr/local/lib/perl/5.10.0/Device/ParallelPort/drv/linux.pm line 68. Also, I have to hack linux.xs, to change default base (0x378). It's not that everyone has parallel port on same port....

Wed Aug 12 07:06:00 2009 The RT System itself - Status changed from 'new' to 'open'

Wed Aug 12 07:26:24 2009 kost [...] linux.hr - Correspondence added

On Wed Aug 12 07:05:57 2009, k0st wrote: Show quoted text

> I got same problem. $this->{DATA}{DEVICE} is not filled. > So, I get this: > Use of uninitialized value in subroutine entry at > /usr/local/lib/perl/5.10.0/Device/ParallelPort/drv/linux.pm line 68. > Also, I have to hack linux.xs, to change default base (0x378). It's not > that everyone has parallel port on same port....

Debugged it a bit. It seems that this thing happens when there is no /dev/parport* device(s) (but, Why I would need it if I'm using direct IO commands?). Some distro doesn't have correct udev rules (e.g. Ubuntu) to make parport by defaut, so you have to make /dev/parport0 by hand: For example: mknod -m 666 /dev/parport0 c 99 0