os2: initial implementation for Darwin&BSDs, process API is only thing incomplete

core/sys/darwin/proc.odin

@@ -0,0 +1,142 @@
+package darwin
+
+import "base:intrinsics"
+
+import "core:sys/posix"
+
+foreign import lib "system:System.framework"
+
+// Incomplete bindings to the proc API on MacOS, add to when needed.
+
+foreign lib {
+	proc_pidinfo     :: proc(pid: posix.pid_t, flavor: PID_Info_Flavor, arg: i64, buffer: rawptr, buffersize: i32) -> i32 ---
+	proc_pidpath     :: proc(pid: posix.pid_t, buffer: [^]byte, buffersize: u32) -> i32 ---
+	proc_listallpids :: proc(buffer: [^]i32, buffersize: i32) -> i32 ---
+}
+
+MAXCOMLEN :: 16
+
+proc_bsdinfo :: struct {
+	pbi_flags:        PBI_Flags,
+	pbi_status:       u32,
+	pbi_xstatus:      u32,
+	pbi_pid:          u32,
+	pbi_ppid:         u32,
+	pbi_uid:          posix.uid_t,
+	pbi_gid:          posix.gid_t,
+	pbi_ruid:         posix.uid_t,
+	pbi_rgid:         posix.gid_t,
+	pbi_svuid:        posix.uid_t,
+	pbi_svgid:        posix.gid_t,
+	rfu_1:            u32,
+	pbi_comm:         [MAXCOMLEN]byte `fmt:"s,0"`,
+	pbi_name:         [2 * MAXCOMLEN]byte `fmt:"s,0"`,
+	pbi_nfiles:       u32,
+	pbi_pgid:         u32,
+	pbi_pjobc:        u32,
+	e_tdev:           u32,
+	e_tpgid:          u32,
+	pbi_nice:         i32,
+	pbi_start_tvsec:  u64,
+	pbi_start_tvusec: u64,
+}
+
+proc_bsdshortinfo :: struct {
+	pbsi_pid:    u32,
+	pbsi_ppid:   u32,
+	pbsi_pgid:   u32,
+	pbsi_status: u32,
+	pbsi_comm:   [MAXCOMLEN]byte `fmt:"s,0"`,
+	pbsi_flags:  PBI_Flags,
+	pbsi_uid:    posix.uid_t,
+	pbsi_gid:    posix.gid_t,
+	pbsi_ruid:   posix.uid_t,
+	pbsi_rgid:   posix.gid_t,
+	pbsi_svuid:  posix.uid_t,
+	pbsi_svgid:  posix.gid_t,
+	pbsi_rfu:    u32,
+}
+
+proc_vnodepathinfo :: struct {
+	pvi_cdir: vnode_info_path,
+	pvi_rdir: vnode_info_path,
+}
+
+vnode_info_path :: struct {
+	vip_vi:   vnode_info,
+	vip_path: [posix.PATH_MAX]byte,
+}
+
+vnode_info :: struct {
+	vi_stat: vinfo_stat,
+	vi_type: i32,
+	vi_pad:  i32,
+	vi_fsid: fsid_t,
+}
+
+vinfo_stat :: struct {
+	vst_dev:           u32,
+	vst_mode:          u16,
+	vst_nlink:         u16,
+	vst_ino:           u64,
+	vst_uid:           posix.uid_t,
+	vst_gid:           posix.gid_t,
+	vst_atime:         i64,
+	vst_atimensec:     i64,
+	vst_mtime:         i64,
+	vst_mtimensec:     i64,
+	vst_ctime:         i64,
+	vst_ctimensec:     i64,
+	vst_birthtime:     i64,
+	vst_birthtimensec: i64,
+	vst_size:          posix.off_t,
+	vst_blocks:        i64,
+	vst_blksize:       i32,
+	vst_flags:         u32,
+	vst_gen:           u32,
+	vst_rdev:          u32,
+	vst_qspare:        [2]i64,
+}
+
+fsid_t :: distinct [2]i32
+
+PBI_Flag_Bits :: enum u32 {
+	SYSTEM      = intrinsics.constant_log2(0x0001),
+	TRACED      = intrinsics.constant_log2(0x0002),
+	INEXIT      = intrinsics.constant_log2(0x0004),
+	PWAIT       = intrinsics.constant_log2(0x0008),
+	LP64        = intrinsics.constant_log2(0x0010),
+	SLEADER     = intrinsics.constant_log2(0x0020),
+	CTTY        = intrinsics.constant_log2(0x0040),
+	CONTROLT    = intrinsics.constant_log2(0x0080),
+	THCWD       = intrinsics.constant_log2(0x0100),
+	PC_THROTTLE = intrinsics.constant_log2(0x0200),
+	PC_SUSP     = intrinsics.constant_log2(0x0400),
+	PC_KILL     = intrinsics.constant_log2(0x0600),
+	PA_THROTTLE = intrinsics.constant_log2(0x0800),
+	PA_SUSP     = intrinsics.constant_log2(0x1000),
+	PA_PSUGID   = intrinsics.constant_log2(0x2000),
+	EXEC        = intrinsics.constant_log2(0x4000),
+}
+PBI_Flags :: bit_set[PBI_Flag_Bits; u32]
+
+PID_Info_Flavor :: enum i32 {
+	LISTFDS = 1,
+	TASKALLINFO,
+	BSDINFO,
+	TASKINFO,
+	THREADINFO,
+	LISTTHREADS,
+	REGIONINFO,
+	REGIONPATHINFO,
+	VNODEPATHINFO,
+	THREADPATHINFO,
+	PATHINFO,
+	WORKQUEUEINFO,
+	SHORTBSDINFO,
+	LISTFILEPORTS,
+	THREADID64INFO,
+	RUSAGE,
+}
+
+PIDPATHINFO_MAXSIZE :: 4*posix.PATH_MAX

core/sys/posix/unistd.odin

@@ -211,7 +211,7 @@ foreign lib {
 
 	[[ More; https://pubs.opengroup.org/onlinepubs/9699919799/functions/_exit.html ]]
 	*/
-	_exit :: proc(status: c.int) ---
+	_exit :: proc(status: c.int) -> ! ---
 
 	/*
 	The exec family of functions shall replace the current process image with a new process image.
@@ -416,8 +416,11 @@ foreign lib {
 			}
 
 			cwd = posix.getcwd(raw_data(buf), len(buf))
-			if errno := posix.errno(); cwd == nil && errno != .ERANGE {
-				fmt.panicf("getcwd failure: %v", posix.strerror(errno))
+			if cwd == nil {
+				errno := posix.errno()
+				if errno != .ERANGE {
+					fmt.panicf("getcwd failure: %v", posix.strerror(errno))
+				}
 			}
 		}
 

core/sys/unix/sysctl_darwin.odin

@@ -67,6 +67,8 @@ CTL_KERN    :: 1
 	KERN_VERSION   :: 4  // Darwin Kernel Version 21.5.0: Tue Apr 26 21:08:22 PDT 2022; root:darwin-8020.121.3~4/RELEASE_X86_64
 	KERN_OSRELDATE :: 26 // i32: OS release date
 	KERN_OSVERSION :: 65 // Build number, e.g. 21F79
+	KERN_PROCARGS  :: 38
+	KERN_PROCARGS2 :: 49
 CTL_VM      :: 2
 CTL_VFS     :: 3
 CTL_NET     :: 4
@@ -82,4 +84,4 @@ CTL_HW      :: 6
 	HW_AVAILCPU     :: 25 /* int: number of available CPUs */
 
 CTL_MACHDEP :: 7
-CTL_USER    :: 8
+CTL_USER    :: 8

core/sys/unix/sysctl_freebsd.odin

@@ -23,6 +23,8 @@ CTL_KERN   :: 1
 	KERN_OSRELEASE :: 2
 	KERN_OSREV     :: 3
 	KERN_VERSION   :: 4
+	KERN_PROC      :: 14
+		KERN_PROC_PATHNAME :: 12
 CTL_VM     :: 2
 CTL_VFS    :: 3
 CTL_NET    :: 4