From 7c0b36088108b4628fc16505e16d8f6e087fff82 Mon Sep 17 00:00:00 2001
From: Fabian Dellwing <fabian.dellwing@gmail.com>
Date: Fri, 10 Mar 2023 12:08:50 +0100
Subject: [PATCH] Kernel: Add non standard value to sys$sysconf

Add `_SC_PHYS_PAGES` to sys$sysconf syscall. This value is needed
for a port I'm working on.
---
 Kernel/API/POSIX/unistd.h   | 2 ++
 Kernel/Syscalls/sysconf.cpp | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Kernel/API/POSIX/unistd.h b/Kernel/API/POSIX/unistd.h
index 5c8bec1e2f..523d7b83e2 100644
--- a/Kernel/API/POSIX/unistd.h
+++ b/Kernel/API/POSIX/unistd.h
@@ -45,6 +45,7 @@ enum {
     _SC_MAPPED_FILES,
     _SC_ARG_MAX,
     _SC_IOV_MAX,
+    _SC_PHYS_PAGES,
 };
 
 #define _SC_MONOTONIC_CLOCK _SC_MONOTONIC_CLOCK
@@ -60,6 +61,7 @@ enum {
 #define _SC_MAPPED_FILES _SC_MAPPED_FILES
 #define _SC_ARG_MAX _SC_ARG_MAX
 #define _SC_IOV_MAX _SC_IOV_MAX
+#define _SC_PHYS_PAGES _SC_PHYS_PAGES
 
 #ifdef __cplusplus
 }
diff --git a/Kernel/Syscalls/sysconf.cpp b/Kernel/Syscalls/sysconf.cpp
index 0f471460ef..d86511342d 100644
--- a/Kernel/Syscalls/sysconf.cpp
+++ b/Kernel/Syscalls/sysconf.cpp
@@ -5,6 +5,7 @@
  */
 
 #include <Kernel/FileSystem/VirtualFileSystem.h>
+#include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/Process.h>
 #include <Kernel/Time/TimeManagement.h>
 
@@ -37,6 +38,8 @@ ErrorOr<FlatPtr> Process::sys$sysconf(int name)
         return Process::max_arguments_size;
     case _SC_IOV_MAX:
         return IOV_MAX;
+    case _SC_PHYS_PAGES:
+        return MM.get_system_memory_info().physical_pages;
     default:
         return EINVAL;
     }