mountinfo: BSDs no longer need reflect

Signed-off-by: 谢致邦 (XIE Zhibang) <Yeking@Red54.com>

mountinfo/mountinfo_bsd.go

@@ -3,24 +3,15 @@
 
 package mountinfo
 
-import (
-	"reflect"
-	"syscall"
-)
+import "syscall"
 
-func getInfo(r reflect.Value, a string, b string) string {
-	if r.FieldByName(a) != (reflect.Value{}) {
-		r = r.FieldByName(a)
-	} else {
-		r = r.FieldByName(b)
-	}
+func getInfo(is []int8) string {
 	var bs []byte
-	for i := 0; i < r.Len(); i++ {
-		i8 := r.Index(i).Int()
-		if i8 == 0 {
+	for _, i := range is {
+		if i == 0 {
 			break
 		}
-		bs = append(bs, byte(i8))
+		bs = append(bs, byte(i))
 	}
 	return string(bs)
 }
@@ -40,12 +31,8 @@ func parseMountTable(filter FilterFunc) ([]*Info, error) {
 
 	var out []*Info
 	for _, entry := range entries {
-		var mountinfo Info
 		var skip, stop bool
-		r := reflect.ValueOf(entry)
-		mountinfo.Mountpoint = getInfo(r, "Mntonname", "F_mntonname" /* OpenBSD */)
-		mountinfo.FSType = getInfo(r, "Fstypename", "F_fstypename" /* OpenBSD */)
-		mountinfo.Source = getInfo(r, "Mntfromname", "F_mntfromname" /* OpenBSD */)
+		mountinfo := getMountinfo(entry)
 
 		if filter != nil {
 			// filter out entries we're not interested in

mountinfo/mountinfo_freebsd.go

@@ -0,0 +1,13 @@
+//go:build freebsd || darwin
+// +build freebsd darwin
+
+package mountinfo
+
+import "syscall"
+
+func getMountinfo(entry syscall.Statfs_t) (mountinfo Info) {
+	mountinfo.Mountpoint = getInfo(entry.Mntonname[:])
+	mountinfo.FSType = getInfo(entry.Fstypename[:])
+	mountinfo.Source = getInfo(entry.Mntfromname[:])
+	return
+}

mountinfo/mountinfo_openbsd.go

@@ -0,0 +1,13 @@
+//go:build openbsd
+// +build openbsd
+
+package mountinfo
+
+import "syscall"
+
+func getMountinfo(entry syscall.Statfs_t) (mountinfo Info) {
+	mountinfo.Mountpoint = getInfo(entry.F_mntonname[:])
+	mountinfo.FSType = getInfo(entry.F_fstypename[:])
+	mountinfo.Source = getInfo(entry.F_mntfromname[:])
+	return
+}