From b9e6f77db0871da3c72928619395590b28ea0181 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Mon, 13 Mar 2023 11:07:12 +0100
Subject: ...

---
 overlays/libdscp/default.nix | 18 ++++++++++++++++++
 user-profiles/utils.nix      |  2 +-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/overlays/libdscp/default.nix b/overlays/libdscp/default.nix
index 47103fd3..9e82f20e 100644
--- a/overlays/libdscp/default.nix
+++ b/overlays/libdscp/default.nix
@@ -8,4 +8,22 @@
 
     makeFlags = [ "PREFIX=$(out)" ];
   };
+
+  dscp = prev.writeShellApplication {
+    name = "dscp";
+
+    text = ''
+      export LD_PRELOAD
+      LD_PRELOAD=''${LD_PRELOAD:+':'$LD_PRELOAD':'}
+      if [[ $LD_PRELOAD != *':'''${final.libdscp}/lib/libdscp.so''':'* ]]; then
+          LD_PRELOAD='${final.libdscp}/lib/libdscp.so'$LD_PRELOAD
+      fi
+      LD_PRELOAD=''${LD_PRELOAD#':'}
+      LD_PRELOAD=''${LD_PRELOAD%':'}
+
+      : "''${DSCP:=0}"
+
+      exec -- "$@"
+    '';
+  };
 }
diff --git a/user-profiles/utils.nix b/user-profiles/utils.nix
index 48df50ea..775b9339 100644
--- a/user-profiles/utils.nix
+++ b/user-profiles/utils.nix
@@ -67,7 +67,7 @@ in {
       psmisc mosh tree vnstat file pv bc zip nmap aspell
       aspellDicts.de aspellDicts.en borgbackup man-pages rsync socat
       inetutils yq cached-nix-shell persistent-nix-shell rage
-      smartmontools hdparm nix-output-monitor wrappedLess
+      smartmontools hdparm nix-output-monitor wrappedLess dscp
     ];
   };
 }
-- 
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