make file ownership setting platform specific

Windows doesn't support Chown(), or the Stat_t type needed to set ownership on a file.

Author: Mike Morris

chown_unix.go

@@ -0,0 +1,24 @@
+// +build !windows
+
+package main
+
+import (
+	"os"
+	"syscall"
+)
+
+func chown(f string) {
+	if st, err := os.Stat(f); err == nil {
+		var uid uint32
+		switch s := st.Sys().(type) {
+		case syscall.Stat_t:
+			uid = s.Uid
+		case *syscall.Stat_t:
+			uid = s.Uid
+		}
+
+		if uid > 0 {
+			os.Chown(cookieFile, int(uid), -1)
+		}
+	}
+}

chown_windows.go

@@ -0,0 +1,7 @@
+// +build windows
+
+package main
+
+func chown(f string) {
+	return
+}

main.go

@@ -576,19 +576,7 @@ func samlClientWithReauth() (saml.AwsClient, error) {
 
 	// set sane ownership on cookieFile, just in case we're running under sudo
 	if h, err := os.UserHomeDir(); err == nil {
-		if st, err := os.Stat(h); err == nil {
-			var uid uint32
-			switch s := st.Sys().(type) {
-			case syscall.Stat_t:
-				uid = s.Uid
-			case *syscall.Stat_t:
-				uid = s.Uid
-			}
-
-			if uid > 0 {
-				os.Chown(cookieFile, int(uid), -1)
-			}
-		}
+		chown(h)
 	}
 
 	log.Debugf("SAMLResponse:\n%s", s)