open & write: Process regular files only

cmd/micro/micro.go

@@ -198,7 +198,13 @@ func LoadInput(args []string) []*buffer.Buffer {
 		// Option 1
 		// We go through each file and load it
 		for i := 0; i < len(files); i++ {
-			buf, err := buffer.NewBufferFromFileAtLoc(files[i], btype, flagStartPos)
+			file := files[i]
+			fileInfo, _ := os.Stat(file)
+			if !fileInfo.Mode().IsRegular() {
+				screen.TermMessage("No regular file: " + file)
+				continue
+			}
+			buf, err := buffer.NewBufferFromFileAtLoc(file, btype, flagStartPos)
 			if err != nil {
 				screen.TermMessage(err)
 				continue

internal/util/util.go

@@ -541,14 +541,17 @@ func resolvePath(filename string) (string, error) {
 	for {
 		// We use Stat() as trick to let the OS do symlink loop detection for us,
 		// since we are lazy to do it ourselves
-		_, err := os.Stat(filename)
+		fileInfo, err := os.Stat(filename)
 		if errors.Is(err, fs.ErrNotExist) {
 			return filename, nil
 		}
 		if err != nil {
 			return filename, err
 		}
-		fileInfo, err := os.Lstat(filename)
+		if !fileInfo.Mode().IsRegular() {
+			return filename, errors.New("No regular file: " + filename)
+		}
+		fileInfo, err = os.Lstat(filename)
 		if err != nil {
 			return filename, err
 		}