Added missing core:sys/info package for NetBSD

core/sys/info/platform_bsd.odin

@@ -1,4 +1,4 @@
-// +build openbsd
+//+build openbsd, netbsd
 package sysinfo
 
 import sys "core:sys/unix"
@@ -11,12 +11,16 @@ version_string_buf: [1024]u8
 
 @(init, private)
 init_os_version :: proc () {
-	os_version.platform = .OpenBSD
+	when ODIN_OS == .NetBSD {
+		os_version.platform = .NetBSD
+	} else {
+		os_version.platform = .OpenBSD
+	}
 
 	kernel_version_buf: [1024]u8
 
 	b := strings.builder_from_bytes(version_string_buf[:])
-	// Retrieve kernel info using `sysctl`, e.g. OpenBSD
+	// Retrieve kernel info using `sysctl`, e.g. OpenBSD and NetBSD
 	mib := []i32{sys.CTL_KERN, sys.KERN_OSTYPE}
 	if !sys.sysctl(mib, &kernel_version_buf) {
 		return
@@ -69,4 +73,4 @@ init_ram :: proc() {
 	if sys.sysctl(mib, &mem_size) {
 		ram.total_ram = int(mem_size)
 	}
-}
+}

core/sys/unix/sysctl_netbsd.odin

@@ -0,0 +1,44 @@
+package unix
+
+import "core:c"
+foreign import libc "system:c"
+
+@(default_calling_convention="c")
+foreign libc {
+	@(link_name="sysctl") _unix_sysctl :: proc(name: [^]i32, namelen: u32, oldp: rawptr, oldlenp: ^c.size_t, newp: rawptr, newlen: c.size_t) -> i32 ---
+}
+
+sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
+	mib := mib
+	result_size := c.size_t(size_of(T))
+	res := _unix_sysctl(raw_data(mib), u32(len(mib)), val, &result_size, nil, 0)
+	return res == 0
+}
+
+// See /usr/include/sys/sysctl.h for details
+CTL_KERN   :: 1
+	KERN_OSTYPE     :: 1
+	KERN_OSRELEASE  :: 2
+	KERN_OSREV      :: 3
+	KERN_VERSION    :: 4
+CTL_VM     :: 2
+CTL_FS     :: 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_IOSTATS      :: 9
+	HW_MACHINE_ARCH :: 10
+	HW_ALIGNBYTES   :: 11
+	HW_CNMAGIC      :: 12
+	HW_PHYSMEM64    :: 13
+	HW_USERMEM64    :: 14
+	HW_IOSTATNAMES  :: 15
+	HW_NCPUONLINE   :: 16