File descriptor leak

[Frediano Ziglio]

> On Wed, Mar 27, 2019 at 3:35 PM Frediano Ziglio <fziglio at redhat.com> wrote:
> >
> > Hi,
> >   I'm running a Fedora 29 installation which has Konsole 18.12.2.
> >
> > I notice that all process launched from the terminal have some
> > additional file descriptors, see
> >
> >
> > $ lsof -p $$
> > COMMAND   PID    USER   FD   TYPE             DEVICE  SIZE/OFF     NODE
> > NAME
> > bash    30055 test  cwd    DIR              253,3      5120 10027009
> > /home/test
> > bash    30055 test  rtd    DIR              253,1      4096        2 /
> > bash    30055 test  txt    REG              253,1   1190216  1708312
> > /usr/bin/bash
> > bash    30055 test  mem    REG              253,1   8406312   787043
> > /var/lib/sss/mc/passwd
> > bash    30055 test  mem    REG              253,1     47648  1756662
> > /usr/lib64/libnss_sss.so.2
> > bash    30055 test  mem    REG              253,1 217749968  1704074
> > /usr/lib/locale/locale-archive
> > bash    30055 test  mem    REG              253,1   2786472  1709415
> > /usr/lib64/libc-2.28.so
> > bash    30055 test  mem    REG              253,1     29320  1709421
> > /usr/lib64/libdl-2.28.so
> > bash    30055 test  mem    REG              253,1    205480  1718729
> > /usr/lib64/libtinfo.so.6.1
> > bash    30055 test  mem    REG              253,1     26398  2101464
> > /usr/lib64/gconv/gconv-modules.cache
> > bash    30055 test  mem    REG              253,1    228072  1737676
> > /usr/lib64/ld-2.28.so
> > bash    30055 test    0u   CHR              136,7       0t0       10
> > /dev/pts/7
> > bash    30055 test    1u   CHR              136,7       0t0       10
> > /dev/pts/7
> > bash    30055 test    2u   CHR              136,7       0t0       10
> > /dev/pts/7
> > bash    30055 test    3r   REG              253,1   8406312   787043
> > /var/lib/sss/mc/passwd
> > bash    30055 test   19u  unix 0x000000003ced4c4b       0t0    55824
> > /run/user/25800/plasmashellAZFpUo.4.slave-socket type=STREAM
> > bash    30055 test   20u  unix 0x00000000e0652f18       0t0    53654
> > /run/user/25800/plasmashellEnUZyE.1.slave-socket type=STREAM
> > bash    30055 test   32u  unix 0x00000000a2333eec       0t0    52580
> > /run/user/25800/plasmashellPiiBFU.3.slave-socket type=STREAM
> > bash    30055 test   33u  unix 0x000000004e2374dd       0t0    55750
> > /run/user/25800/plasmashelldrtBhD.2.slave-socket type=STREAM
> > bash    30055 test   37u  unix 0x000000009da65e58       0t0    55830
> > /run/user/25800/plasmashellmcEFFS.6.slave-socket type=STREAM
> > bash    30055 test  255u   CHR              136,7       0t0       10
> > /dev/pts/7
> >
> >
> > (the /run/user/25800/plasmashell<XXXX>.slave-socket ones).
> >
> > I tried to have a look at the sources but I cannot find where these sockets
> > are created or why they are used.
> > In the /run/user/25800/ directory there are not these files.
> >
> > Frediano
> 
> Hi,
> 
> These sockets are created by KIO:
> https://cgit.kde.org/kio.git/tree/src/core/connectionbackend.cpp#n143
> They are created in (and passed from) plasma, so it might be bigger
> feature/bug.
> 
> I am able to reproduce it with a few 'dolphin*.slave-socket' when
> running konsole from dolphin (Ubuntu 18.10).
> Not much info, but maybe it will help somehow.
> 

Thank you.
Apparently the issue disappeared. I checked the update history and
there are no konsole/plasmashell updates but there's a qt/qt-common
update (after I sent this e-mail).
Maybe the file descriptor were inherited by plasmashell and now
for some reasons plasmashell does not need these file descriptor,
maybe they fixed the inheritance in qt.
I'll post again if it reappears.

Frediano