Bug 440990

Summary:	Too many file descriptors inherited by the shell
Product:	[Applications] konsole	Reporter:	gus
Component:	general	Assignee:	Konsole Bugs <konsole-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	christoph, m.kurz, p.r.worrall, tavianator
Priority:	NOR
Version First Reported In:	21.08.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description gus 2021-08-15 00:21:07 UTC

SUMMARY
Konsole seems to start the shell with many (sometimes hundreds) file descriptors still open, instead of just 0, 1 and 2. I presume konsole should flag all of its file descriptors with O_CLOSEXEC so that they are not inherited by the shell, but doesn't seem to do so.

To be fair, other terminals (but not Gnome terminal) display the same behavior. So the problem of not closing these file descriptors may be upstream from Konsole.

STEPS TO REPRODUCE
1. Open konsole
2. ls -l /dev/$$/fd

OBSERVED RESULT

```
gusqt@gus-laptop ~  0 > ls -l /proc/$$/fd
total 0
lrwx------ 1 gusqt gusqt 64 Aug 14 19:58 0 -> /dev/pts/4
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 1 -> /dev/pts/4
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 10 -> /dev/pts/4
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 100 -> 'pipe:[180366]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 101 -> 'pipe:[180367]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 102 -> 'pipe:[173044]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 103 -> 'pipe:[174571]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 104 -> 'pipe:[194700]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 105 -> 'pipe:[198322]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 106 -> 'pipe:[174572]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 107 -> 'pipe:[174601]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 108 -> 'pipe:[174602]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 109 -> 'pipe:[174603]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 110 -> 'pipe:[174604]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 111 -> 'pipe:[174633]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 112 -> 'pipe:[174634]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 113 -> 'pipe:[174635]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 114 -> 'pipe:[176160]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 115 -> 'pipe:[176161]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 116 -> 'pipe:[174653]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 117 -> 'pipe:[174654]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 118 -> 'pipe:[174655]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 119 -> 'pipe:[187829]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 120 -> 'pipe:[187830]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 121 -> 'pipe:[198323]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 122 -> 'pipe:[198324]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 123 -> 'pipe:[199357]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 124 -> 'pipe:[199358]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 128 -> 'pipe:[199359]'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 2 -> /dev/pts/4
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 25 -> 'pipe:[108056]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 26 -> 'pipe:[108071]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 27 -> 'pipe:[108072]'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 3 -> /run/user/1008/wayland-0.lock
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 34 -> anon_inode:inotify
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 37 -> '/memfd:pulseaudio (deleted)'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 4 -> 'socket:[84535]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 46 -> 'pipe:[114303]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 47 -> 'pipe:[117041]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 49 -> 'pipe:[117042]'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 52 -> 'socket:[87078]'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 56 -> 'socket:[87080]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 70 -> 'pipe:[122857]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 72 -> 'pipe:[122858]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 73 -> 'pipe:[118579]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 75 -> 'pipe:[118580]'
lrwx------ 1 gusqt gusqt 64 Aug 14 19:59 81 -> '/memfd:pulseaudio (deleted)'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 88 -> 'pipe:[154291]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 90 -> 'pipe:[154292]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 91 -> 'pipe:[174552]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 92 -> 'pipe:[175716]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 95 -> 'pipe:[173042]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 96 -> 'pipe:[173043]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 97 -> 'pipe:[194699]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 98 -> 'pipe:[175717]'
lr-x------ 1 gusqt gusqt 64 Aug 14 19:59 99 -> 'pipe:[175718]'
```

EXPECTED RESULT
Only file descriptors 0, 1 and 2, pointing to the console, should be present. For example, something like:

```
gusqt@gus-laptop ~ 2 0 > ls -l /proc/$$/fd
total 0
lrwx------ 1 gusqt gusqt 64 Aug 14 20:12 0 -> /dev/pts/5
lrwx------ 1 gusqt gusqt 64 Aug 14 20:12 1 -> /dev/pts/5
lrwx------ 1 gusqt gusqt 64 Aug 14 20:12 2 -> /dev/pts/5
```


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.22.4 (on wayland)
KDE Frameworks Version: 
Qt Version: 5

ADDITIONAL INFORMATION

Comment 1 Paul Worrall 2021-08-15 11:03:27 UTC

On Neon Unstable (Wayland session):


paul@desktop:~$ ls -l /proc/$$/fd
total 0
lrwx------ 1 paul paul 64 Aug 15 11:59 0 -> /dev/pts/1
lrwx------ 1 paul paul 64 Aug 15 11:59 1 -> /dev/pts/1
lrwx------ 1 paul paul 64 Aug 15 11:59 13 -> 'socket:[37369]'
lr-x------ 1 paul paul 64 Aug 15 11:59 17 -> /dev/urandom
lrwx------ 1 paul paul 64 Aug 15 11:59 2 -> /dev/pts/1
lrwx------ 1 paul paul 64 Aug 15 11:59 255 -> /dev/pts/1
lrwx------ 1 paul paul 64 Aug 15 11:59 4 -> /run/user/2000/wayland-0.lock
lrwx------ 1 paul paul 64 Aug 15 11:59 5 -> 'socket:[36775]'
lrwx------ 1 paul paul 64 Aug 15 11:59 51 -> 'socket:[37080]'
lrwx------ 1 paul paul 64 Aug 15 11:59 55 -> 'socket:[37082]'

Comment 2 gus 2025-02-21 22:05:05 UTC

The correct number fds show up. Well, I am not sure why 10 is here in the list, but at least it points to the terminal, so not too concerned.

> ls -l /proc/$$/fd
total 0
lrwx------. 1 gus gus 64 Feb 21 16:57 0 -> /dev/pts/5
lrwx------. 1 gus gus 64 Feb 21 16:57 1 -> /dev/pts/5
lrwx------. 1 gus gus 64 Feb 21 16:57 10 -> /dev/pts/5
lrwx------. 1 gus gus 64 Feb 21 16:57 2 -> /dev/pts/5