liminix

commit 33f2a9348943056ecf0dc9b050c7e64a713a4800
parent d0376d41016e0ddbd532b63f7fd3b2f4fcbcdf37
Author: Peter Collingbourne <peter@pcc.me.uk>
Date:   Sun,  3 May 2026 00:37:12 -0700

ifwait: React to interface up by bringing up the service tree

This allows a system to be configured to dynamically bring up services
associated with an interface. For example, attaching a USB ethernet
adapter could trigger starting a DHCP client and an additional default
route for failover to an additional upstream.

Diffstat:
M
pkgs/ifwait/default.nix
 | 
4
++++
M
pkgs/ifwait/ifwait.fnl
 | 
2
+-

2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/pkgs/ifwait/default.nix b/pkgs/ifwait/default.nix
@@ -3,6 +3,8 @@
   writeFennel,
   runCommand,
   anoia,
+  lualinux,
+  s6-rc-up-tree,
 }:
 runCommand "ifwait" { } ''
   mkdir -p $out/bin
@@ -10,7 +12,9 @@ runCommand "ifwait" { } ''
     writeFennel "ifwait" {
       packages = [
         anoia
+        lualinux
         netlink-lua
+        s6-rc-up-tree
       ];
     } ./ifwait.fnl
   } $out/bin/ifwait
diff --git a/pkgs/ifwait/ifwait.fnl b/pkgs/ifwait/ifwait.fnl
@@ -37,7 +37,7 @@
   (when (not (= up wanted?))
     (set up
          (if wanted?
-             (pcall system (.. "s6-rc -b -u change " service))
+             (pcall system (.. "s6-rc-up-tree " service))
              (not (pcall system (.. "s6-rc -b -d change " service)))))
     ))