[sys/info] Move FreeBSD sysctl to sys/unix.

core/sys/unix/sysctl_freebsd.odin.odin

@@ -0,0 +1,44 @@
+//+build freebsd
+package unix
+
+import "core:intrinsics"
+
+sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
+	mib := mib
+	result_size := i64(size_of(T))
+
+	res := intrinsics.syscall(SYS_sysctl,
+		uintptr(raw_data(mib)), uintptr(len(mib)),
+		uintptr(val), uintptr(&result_size),
+		uintptr(0), uintptr(0),
+	)
+	return res == 0
+}
+
+// See /usr/include/sys/sysctl.h for details
+CTL_SYSCTL :: 0
+CTL_KERN   :: 1
+	KERN_OSTYPE    :: 1
+	KERN_OSRELEASE :: 2
+	KERN_OSREV     :: 3
+	KERN_VERSION   :: 4
+CTL_VM     :: 2
+CTL_VFS    :: 3
+CTL_NET    :: 4
+CTL_DEBUG  :: 5
+CTL_HW     :: 6
+	HW_MACHINE      ::  1
+	HW_MODEL        ::  2
+	HW_NCPU         ::  3
+	HW_BYTEORDER    ::  4
+	HW_PHYSMEM      ::  5
+	HW_USERMEM      ::  6
+	HW_PAGESIZE     ::  7
+	HW_DISKNAMES    ::  8
+	HW_DISKSTATS    ::  9
+	HW_FLOATINGPT   :: 10
+	HW_MACHINE_ARCH :: 11
+	HW_REALMEM      :: 12
+CTL_MACHDEP  :: 7
+CTL_USER     :: 8
+CTL_P1003_1B :: 9