From e72e1e4e43000e78f1d57dfff68debe1915196d1 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Wed, 23 Jul 2025 16:34:40 +0300
Subject: [PATCH] LibC: Add _SC_NPROCESSORS_{CONF,ONLN)

---
 kernel/include/kernel/Process.h                | 2 ++
 kernel/kernel/Process.cpp                      | 5 +++++
 userspace/libraries/LibC/include/sys/syscall.h | 1 +
 userspace/libraries/LibC/include/unistd.h      | 4 ++++
 userspace/libraries/LibC/unistd.cpp            | 3 +++
 5 files changed, 15 insertions(+)

diff --git a/kernel/include/kernel/Process.h b/kernel/include/kernel/Process.h
index c58f03c4..6eb394ca 100644
--- a/kernel/include/kernel/Process.h
+++ b/kernel/include/kernel/Process.h
@@ -161,6 +161,8 @@ namespace Kernel
 
 		BAN::ErrorOr<long> sys_sync(bool should_block);
 
+		BAN::ErrorOr<long> sys_get_nprocessor();
+
 		static BAN::ErrorOr<long> clean_poweroff(int command);
 		BAN::ErrorOr<long> sys_poweroff(int command);
 
diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 02d4e724..74e70a3f 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -2011,6 +2011,11 @@ namespace Kernel
 		return 0;
 	}
 
+	BAN::ErrorOr<long> Process::sys_get_nprocessor()
+	{
+		return Processor::count();
+	}
+
 	[[noreturn]] static void reset_system()
 	{
 		(void)ACPI::ACPI::get().reset();
diff --git a/userspace/libraries/LibC/include/sys/syscall.h b/userspace/libraries/LibC/include/sys/syscall.h
index 1bfa45ac..8d5b0746 100644
--- a/userspace/libraries/LibC/include/sys/syscall.h
+++ b/userspace/libraries/LibC/include/sys/syscall.h
@@ -108,6 +108,7 @@ __BEGIN_DECLS
 	O(SYS_EPOLL_CTL,		epoll_ctl)		\
 	O(SYS_EPOLL_PWAIT2,		epoll_pwait2)	\
 	O(SYS_FLOCK,			flock)			\
+	O(SYS_GET_NPROCESSOR,	get_nprocessor)	\
 
 enum Syscall
 {
diff --git a/userspace/libraries/LibC/include/unistd.h b/userspace/libraries/LibC/include/unistd.h
index dc19c436..6300d511 100644
--- a/userspace/libraries/LibC/include/unistd.h
+++ b/userspace/libraries/LibC/include/unistd.h
@@ -342,6 +342,10 @@ enum
 #define _SC_MQ_PRIO_MAX _SC_MQ_PRIO_MAX
 	_SC_NGROUPS_MAX,
 #define _SC_NGROUPS_MAX _SC_NGROUPS_MAX
+	_SC_NPROCESSORS_CONF,
+#define _SC_NPROCESSORS_CONF _SC_NPROCESSORS_CONF
+	_SC_NPROCESSORS_ONLN,
+#define _SC_NPROCESSORS_ONLN _SC_NPROCESSORS_ONLN
 	_SC_OPEN_MAX,
 #define _SC_OPEN_MAX _SC_OPEN_MAX
 	_SC_PAGE_SIZE,
diff --git a/userspace/libraries/LibC/unistd.cpp b/userspace/libraries/LibC/unistd.cpp
index 858b8b19..1f57d1ed 100644
--- a/userspace/libraries/LibC/unistd.cpp
+++ b/userspace/libraries/LibC/unistd.cpp
@@ -1015,6 +1015,9 @@ long sysconf(int name)
 		case _SC_PAGE_SIZE:
 		case _SC_PAGESIZE:         return getpagesize();
 
+		case _SC_NPROCESSORS_ONLN: return syscall(SYS_GET_NPROCESSOR);
+		case _SC_NPROCESSORS_CONF: return syscall(SYS_GET_NPROCESSOR);
+
 		case _SC_CLK_TCK:          return 100;
 		case _SC_GETGR_R_SIZE_MAX: return 1024;
 		case _SC_GETPW_R_SIZE_MAX: return 1024;