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Bug 2109252

Summary: getty does not show tty it is running on
Product: Red Hat Enterprise Linux 9 Reporter: Louis Abel <tucklesepk>
Component: util-linuxAssignee: Karel Zak <kzak>
Status: CLOSED DUPLICATE QA Contact: Radka Brychtova <rskvaril>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: dtardon, systemd-maint-list
Target Milestone: rcFlags: pm-rhel: mirror+
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Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2023-01-17 16:56:14 UTC Type: Bug
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Description Louis Abel 2022-07-20 18:49:58 UTC
Description of problem:
When changing /etc/issue to use the \l control code (which presents the tty the getty is running on), it shows as a dash (-) instead of tty1. This behavior differs from RHEL 8 and current Fedora.

This may be due to the change to using the stdin file descriptor to determine the tty.

agetty --show-issue shows expected results (though likely just as an example for the user)

Version-Release number of selected component (if applicable):
This occurs on 9.0 and CentOS Stream 9.

How reproducible:
Always

Steps to Reproduce:
1. Modify /etc/issue and include \l...

2c2
< Kernel \r on an \m
---
> Kernel \r on an \m (\l)

2. systemctl restart getty (or logout if already on tty1 console, or switch to tty2/tty3/etc)

Actual results:
Red Hat Enterprise Linux 9.0 (Plow)
Kernel 5.14.0-70.17.1.el9_0.x86_64 on an x86_64 (-)

CentOS Stream 9
Kernel 5.14.0-119.el9.x86_64 on an x86_64 (-)

Rocky Linux 9.0 (Blue Onyx)
Kernel 5.14.0-70.17.1.el9_0.x86_64 on an x86_64 (-)

Expected results:
Running tty is shown, similar to Fedora.

Fedora Linux 36 (Thirty Six)
Kernel 5.18.7-200.fc36.x86_64 on an x86_64 (tty1)

Additional info:
This was reported at the Rocky Linux bug tracker: https://bugs.rockylinux.org/view.php?id=156 and confirmed on a RHEL 9.0 and CentOS Stream 9 system.

Comment 1 David Tardon 2022-08-07 13:11:57 UTC
It works as expected in Fedora. Maybe a difference in build configuration?

Comment 2 Karel Zak 2022-08-09 12:28:16 UTC
Fixed in upstream tree by commit 47831cc02ac0d71c335caecef1753f4c8861277c.

Comment 3 Karel Zak 2023-01-17 16:56:14 UTC

*** This bug has been marked as a duplicate of bug 2156946 ***