[Eric] eric4 refuses to be backgrounded

[Leonardo Giordani]

As long as I remember this happens since the beginning of the year if not
before, i.e. from Ubuntu 10.10 probably. I'm not sure, but I noticed this
very long ago.

Leo


2012/11/22 Detlev Offenbach <detlev at die-offenbachs.de>

> **
>
> Hello,
>
>
>
> how long do I have to wait? I just tried it and waited 2 or 3 minutes and
> nothing bad happend (openSUSE 12.2).
>
>
>
> I am doing no daemonization magic (unless there is something in some of
> the libraries like Qt).
>
>
>
> Regards,
>
> Detlev
>
>
>
> On Thursday 22 November 2012, 00:50:20 Dan wrote:
>
> > Here's what an strace looks like (for stdin, stdout, stderr reassigned
>
> > to /dev/null):
>
> >
>
> > strace -f -o /tmp/log.txt eric4 >/dev/null &>/dev/null &
>
> >
>
> > ...
>
> > 18697 getpgrp() = 18692
>
> > 18697 ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbf9ef968) = -1 EINVAL
>
> > (Invalid argument)
>
> > 18697 open("/dev/tty", O_RDWR|O_NONBLOCK|O_LARGEFILE) = 3
>
> > 18697 getrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=4*1024}) = 0
>
> > 18697 fcntl64(255, F_GETFD) = -1 EBADF (Bad file descriptor)
>
> > 18697 dup2(3, 255) = 255
>
> > 18697 close(3) = 0
>
> > 18697 ioctl(255, TIOCGPGRP, [28100]) = 0
>
> > 18697 rt_sigaction(SIGTTIN, {SIG_DFL, [], 0}, {SIG_IGN, [], 0}, 8) = 0
>
> > 18697 kill(0, SIGTTIN) = 0
>
> > 18697 --- SIGTTIN (Stopped (tty input)) @ 0 (0) ---
>
> >
>
> > ... and then it keeps it getting SIGTTIN. Interestingly it eventually
>
> > resumes. This could be some kind of failed daemonization magic.
>
> >
>
> > -- Dan
>
> >
>
> > On 11/22/12, Mike C. Fletcher <mcfletch at vrplumber.com> wrote:
>
> > > On 12-11-21 05:13 PM, Dan wrote:
>
> > >> In Linux, eric 4.5.7 seems to refuse to be run as a background job:
>
> > >>
>
> > >> eric &
>
> > >>
>
> > >> reports Stopped after a while, and I have to "fg" it to continue. Any
>
> > >> idea why this might happen? I'm on Ubuntu 12.04.
>
> > >
>
> > > I can confirm that the behaviour exists on a 12.04 Kubuntu box as
> well...
>
> > >
>
> > > (gui-env)mcfletch at raistlin:~/atx-dev/digistream$ eric4 --debug &
>
> > > [2] 32333
>
> > > (gui-env)mcfletch at raistlin:~/atx-dev/digistream$ DEBUG:root:Importing
>
> > > Preferences
>
> > > Warning: translation file 'qt_en_CA'could not be loaded.
>
> > > Using default.
>
> > > Warning: translation file 'eric4_en_CA'could not be loaded.
>
> > > Using default.
>
> > > Warning: translation file 'qscintilla_en_CA'could not be loaded.
>
> > > Using default.
>
> > > DEBUG:root:Importing packages...
>
> > > DEBUG:root:Generating Main Window...
>
> > > DEBUG:root:Initializing Plugin Manager...
>
> > > DEBUG:root:Generating Main User Interface...
>
> > > DEBUG:root:Creating Layout...
>
> > > DEBUG:root:Creating Viewmanager...
>
> > > DEBUG:root:Creating dockable windows...
>
> > >
>
> > >
>
> > > [2]+ Stopped eric4 --debug
>
> > >
>
> > > No idea why. Same command without the & runs fine.
>
> > >
>
> > > HTH,
>
> > > Mike
>
> > >
>
> > > --
>
> > > ________________________________________________
>
> > >
>
> > > Mike C. Fletcher
>
> > > Designer, VR Plumber, Coder
>
> > > http://www.vrplumber.com
>
> > > http://blog.vrplumber.com
>
> > >
>
> > > _______________________________________________
>
> > > Eric mailing list
>
> > > Eric at riverbankcomputing.com
>
> > > http://www.riverbankcomputing.com/mailman/listinfo/eric
>
> >
>
> > _______________________________________________
>
> > Eric mailing list
>
> > Eric at riverbankcomputing.com
>
> > http://www.riverbankcomputing.com/mailman/listinfo/eric
> --
>
> Detlev Offenbach
>
> detlev at die-offenbachs.de
>
> _______________________________________________
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> http://www.riverbankcomputing.com/mailman/listinfo/eric
>
>


-- 
Leonardo Giordani
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