From f88b0825c565629c20e016de491579671faf8090 Mon Sep 17 00:00:00 2001
From: Zhong Jianxin <azuwis@gmail.com>
Date: Mon, 20 Dec 2021 11:35:04 +0800
Subject: [PATCH] Provide fake /proc/stat if it's not readable

to make unpatched htop work
---
 modules/environment/login/login.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/modules/environment/login/login.nix b/modules/environment/login/login.nix
index 8861d4a..bf8321b 100644
--- a/modules/environment/login/login.nix
+++ b/modules/environment/login/login.nix
@@ -1,9 +1,12 @@
 # Copyright (c) 2019-2020, see AUTHORS. Licensed under MIT License, see LICENSE.
 
-{ config, writeScript }:
+{ config, writeScript, writeText }:
 
 let
   inherit (config.build) installationDir extraProotOptions;
+  fakeProcStat = writeText "fakeProcStat" ''
+    btime 0
+  '';
 in
 
 writeScript "login" ''
@@ -28,6 +31,12 @@ writeScript "login" ''
     fi
   fi
 
+  if [ -r /proc/stat ]; then
+    BIND_PROC_STAT=""
+  else
+    BIND_PROC_STAT="-b ${installationDir}${fakeProcStat}:/proc/stat"
+  fi
+
   exec ${installationDir}/bin/proot-static \
     -b ${installationDir}/nix:/nix \
     -b ${installationDir}/bin:/bin \
@@ -35,6 +44,7 @@ writeScript "login" ''
     -b ${installationDir}/tmp:/tmp \
     -b ${installationDir}/usr:/usr \
     -b ${installationDir}/dev/shm:/dev/shm \
+    $BIND_PROC_STAT \
     -b /:/android \
     --link2symlink \
     --sysvipc \