posix: add package

core/sys/posix/utime.odin

@@ -0,0 +1,36 @@
+package posix
+
+when ODIN_OS == .Darwin {
+	foreign import lib "system:System.framework"
+} else {
+	foreign import lib "system:c"
+}
+
+// utime.h - access and modification time structure
+
+foreign lib {
+	/*
+	Set file access and modification times.
+
+	[[ More; https://pubs.opengroup.org/onlinepubs/9699919799/functions/utime.html ]]
+	*/
+	@(link_name=LUTIME)
+	utime :: proc(path: cstring, times: ^utimbuf) -> result ---
+}
+
+when ODIN_OS == .NetBSD {
+	@(private) LUTIME :: "__utime50"
+} else {
+	@(private) LUTIME :: "utime"
+}
+
+when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD	{
+
+	utimbuf :: struct {
+		actime:  time_t, /* [PSX] access time (seconds since epoch) */
+		modtime: time_t, /* [PSX] modification time (seconds since epoch) */
+	}
+
+} else {
+	#panic("posix is unimplemented for the current target")
+}