Why isn't the window closing immediately when running a zsh command with -i option?

[xfzv]

% kitty --version
kitty 0.25.1 created by Kovid Goyal

% zsh --version
zsh 5.9 (x86_64-pc-linux-gnu)

If I run:

% kitty -e /bin/zsh -i -c "echo hello"

a new window appears with "hello" printed, as expected. However, it remains displayed for about 5 seconds before disappearing. Why? with other terminal emulators such as Alacritty or Konsole, the window instantly disappears:

zsh_hello.mp4

% time alacritty -e /bin/zsh -i -c "echo hello"
alacritty -e /bin/zsh -i -c "echo hello"  0,15s user 0,10s system 119% cpu 0,205 total

% time konsole -e /bin/zsh -i -c "echo hello"
konsole -e /bin/zsh -i -c "echo hello"  0,23s user 0,10s system 97% cpu 0,332 total

% time kitty -e /bin/zsh -i -c "echo hello"
kitty -e /bin/zsh -i -c "echo hello"  0,20s user 0,10s system 5% cpu 5,345 total

If I run instead

% kitty -e /bin/bash -i -c "echo hello"

then the window disappears instantly (same behavior for every terminal emulator):

% time alacritty -e /bin/bash -i -c "echo hello"                                                                                
alacritty -e /bin/bash -i -c "echo hello"  0,06s user 0,06s system 79% cpu 0,140 total

% time konsole -e /bin/bash -i -c "echo hello"                                                                                  
konsole -e /bin/bash -i -c "echo hello"  0,18s user 0,06s system 89% cpu 0,270 total

% time kitty -e /bin/bash -i -c "echo hello"
kitty -e /bin/bash -i -c "echo hello"  0,12s user 0,06s system 80% cpu 0,233 total

Is there a way to suppress this delay when running a zsh interactive command?

Thanks!

[kovidgoyal]

Does not reproduce for me time kitty -e /bin/zsh -i -c "echo hello"   real 0.243 user 0.186 sys 0.066 maxmem 119 MB faults 5 It will be something in your zsh rc files bisect them to find out.

[xfzv]

Does not reproduce for me time kitty -e /bin/zsh -i -c "echo hello" real 0.243 user 0.186 sys 0.066 maxmem 119 MB faults 5 It will be something in your zsh rc files bisect them to find out.

Thank you. Indeed, turns out the delay is due to powerlevel10k. I can reproduce consistently (Edit: not 100% of the time, sometimes it exits immediately too) without any other zsh related config file, only powerlevel10k.

I wonder why this occurs specifically with kitty and not with Alacritty, Konsole or Urxvt though.

[kovidgoyal]

Read the powerlevel10k readme it will tell you

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On Mon, May 30, 2022 at 10:32:03AM -0700, xfzv wrote: > Does not reproduce for me time kitty -e /bin/zsh -i -c "echo hello" real 0.243 user 0.186 sys 0.066 maxmem 119 MB faults 5 It will be something in your zsh rc files bisect them to find out. Thank you. Indeed, turns out the delay is due to [powerlevel10k](https://github.com/romkatv/powerlevel10k). I can reproduce consistently without any other zsh related config file, only powerlevel10k. I wonder why this occurs specifically with kitty and not with Alacritty, Konsole or Urxvt though. -- Reply to this email directly or view it on GitHub: #5148 (reply in thread) You are receiving this because you commented. Message ID: ***@***.***>

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_____________________________________ Dr. Kovid Goyal https://www.kovidgoyal.net https://calibre-ebook.com

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[xfzv]

Fixed with close_on_child_death yes, many thanks to @romkatv for pointing me in the right direction

[kovidgoyal]

That fix would imply that powerlevel10k is forking a background process that keeps the terminal pipe open.

[romkatv]

It's possible that it does. There is no harm in that though.