Re: printing from java app

[Jeremy Smallman <jeremy.smallman%doxsystems.com@localhost>]

Doing ktrace -i, then "kdump | grep lpt" produces nothing.

Jeremy


On Tue, 2009-03-24 at 18:25, Christos Zoulas wrote:
> In article <1237910883.14859.24.camel@v250>,
> Jeremy Smallman  <jeremy.smallman%doxsystems.com@localhost> wrote:
> >Thanks for the tip.  Here's what I found in one of the processes when
> >trying to open the /dev/lpt0 port in the java app:
> >                     .
> >                     .
> >                     .               
> > 16935      1 java     CALL  gettimeofday(0xb65fee18,0)
> > 16935      1 java     RET   gettimeofday 0
> > 16935      1 java     PSIG  SIGSEGV caught handler=0xbbb9ef20
> >mask=(3,33): code=SEGV_MAPERR, addr=0x4, trap=14)
> > 16935      1 java     CALL  rt_sigreturn(0xb65fef40)
> > 16935      1 java     RET   rt_sigreturn -1 errno -2 No such file or
> >directory
> > 16935      1 java     CALL  write(2,0xb65fcd9c,0x39)
> > 16935      1 java     GIO   fd 2 wrote 57 bytes
> >       "jpos.JposException: Can not open the communications port."
> > 16935      1 java     RET   write 57/0x39
> > 16935      1 java     CALL  write(2,0xb65fcdcc,1)
> > 16935      1 java     GIO   fd 2 wrote 1 bytes
> >                     .
> >                     .
> >                     .
> >
> >I'm running the java app as root so permissions shouldn't be an issue. 
> >It seems the app thinks the port doesn't exist or it thinks the printer
> >is not attached to the port . . .?  This java application works fine
> >with the printer on an OpenSUSE box, so I know it's not a problem with
> >the java app.
> >
> 
> So what's the sequence from opening /dev/lpt0 on?
> 
> christos