List files even when lstat fails

Implements a `fakeStat` struct with dummy values and stores the
error in `file.err`, then shows the error instead of FileInfo, if
the file is inaccesible.

Fixes gokcehan#1359

nav.go

@@ -37,6 +37,7 @@ type file struct {
 	accessTime time.Time
 	changeTime time.Time
 	ext        string
+	err        error
 }
 
 func (file *file) TotalSize() int64 {
@@ -49,6 +50,17 @@ func (file *file) TotalSize() int64 {
 	return file.Size()
 }
 
+type fakeStat struct {
+	name string
+}
+
+func (fs *fakeStat) Name() string       { return fs.name }
+func (fs *fakeStat) Size() int64        { return 0 }
+func (fs *fakeStat) Mode() os.FileMode  { return os.FileMode(0000) }
+func (fs *fakeStat) ModTime() time.Time { return time.Unix(0, 0) }
+func (fs *fakeStat) IsDir() bool        { return false }
+func (fs *fakeStat) Sys() any           { return nil }
+
 func readdir(path string) ([]*file, error) {
 	f, err := os.Open(path)
 	if err != nil {
@@ -68,6 +80,18 @@ func readdir(path string) ([]*file, error) {
 		}
 		if err != nil {
 			log.Printf("getting file information: %s", err)
+			files = append(files, &file{
+				FileInfo:   &fakeStat{name: fname},
+				linkState:  notLink,
+				linkTarget: "",
+				path:       fpath,
+				dirCount:   -1,
+				dirSize:    -1,
+				accessTime: time.Unix(0, 0),
+				changeTime: time.Unix(0, 0),
+				ext:        filepath.Ext(fpath),
+				err:        err,
+			})
 			continue
 		}
 
@@ -130,6 +154,7 @@ func readdir(path string) ([]*file, error) {
 			accessTime: at,
 			changeTime: ct,
 			ext:        ext,
+			err:        nil,
 		})
 	}
 

ui.go

@@ -726,6 +726,11 @@ func (ui *ui) loadFileInfo(nav *nav) {
 		return
 	}
 
+	if curr.err != nil {
+		ui.echoerrf("stat: %s", curr.err)
+		return
+	}
+
 	statfmt := strings.ReplaceAll(gOpts.statfmt, "|", "\x1f")
 	replace := func(s string, val string) {
 		if val == "" {