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14 comments

luckman212 a day ago

I filed a bashbug: https://savannah.gnu.org/bugs/index.php?68722
asiliev20 14 hours ago

Who needs a physical MAC address when you can just have a spiritual connection to the iCloud?
luckman212 a day ago

27.0.1 did not fix it, and I reproduced it on 2 more Macs, one was literally factory reset, just installed a fresh macOS 27, installed Homebrew, installed Bash5, ran ifconfig .... bug reproduced
luckman212 a day ago

Interestingly, running `ifconfig` from a Zsh shell still does show MAC addresses
lapcat 2 days ago

I can't reproduce this.
[-]
- luckman212 2 days ago
  It seems to only affect Bash 5.3.20 (Homebrew) - very odd:
```
    % /bin/bash --version
    GNU bash, version 3.2.57(1)-release (arm64-apple-darwin26)
    
    % /opt/homebrew/bin/bash --version
    GNU bash, version 5.3.20(1)-release (aarch64-apple-darwin27.0.0)
    
    % zsh -c '/sbin/ifconfig en0 | grep ether'
    ether d0:11:e5:1a:27:7a
    
    % /bin/bash -c '/sbin/ifconfig en0 | grep ether'
    ether d0:11:e5:1a:27:7a
    
    % /opt/homebrew/bin/bash -c '/sbin/ifconfig en0 | grep ether'
    ether 02:00:00:00:00:00
```
  [-]
  - jen20 an hour ago
    
    Interestingly I can also reproduce it with Bash 5.3.15 from nix-darwin.
    I wonder if this is about notarization or something.
    
    [-]
    
    jen20 44 minutes ago
    
    Update: I think it's about code signature and how the API responds - which also corresponds to root and system binaries not seeing the issue.
  - hrbrmstr 2 days ago
    
    it works fine in system bash for me
    
    [-]
    
    luckman212 a day ago
    
    Yes it works in my system bash too (see above) - seems to be some sort of obscure Bash bug...
ButlerianJihad a day ago

ifconfig is deprecated in modern Linux. Is it not deprecated in BSD? Does Apple not provide the ip(8) command-line tools?
https://manpages.ubuntu.com/manpages/stonking/man8/ip.8.html
No, it seems that iproute2 is Linux-first, or Linux-only: https://en.wikipedia.org/wiki/Iproute2
Sad!
[-]
- dTal a day ago
  
  Who says it's deprecated? If it's the same people who think my Ethernet port should be called "enp0s31f6" instead of "eth0", then I'm afraid I do not respect their authority...
  [-]
  - ButlerianJihad 19 hours ago
    
    The people who maintained it, the kernel developers, the Debian distribution team? You don't accept their authority? I mean, I know this is a MacOS thread, but that's wild.
    https://lists.debian.org/debian-devel/2009/03/msg00780.html
    16+ years ago
    The maintainers barely touched it since 2001.
    
    [-]
    
    fragmede 19 hours ago
    
    Fascinatingly enough, this is Conway's law in action. The Linux kernel doesn't break user space, and ifconfig is on the user space side of that boundary. On BSD, they're organized differently, and went a different way.