1 files changed, 41 insertions, 9 deletions
diff --git a/internal/syscallcompat/getdents_other.go b/internal/syscallcompat/getdents_other.go
index 4ef5b8f..6d08a9b 100644
--- a/internal/syscallcompat/getdents_other.go
+++ b/internal/syscallcompat/getdents_other.go
@@ -1,17 +1,49 @@
-// +build !linux
-
 package syscallcompat
 
 import (
-	"log"
+	"os"
+	"syscall"
+
+	"golang.org/x/sys/unix"
 
 	"github.com/hanwen/go-fuse/fuse"
 )
 
-// HaveGetdents is true if we have a working implementation of Getdents
-const HaveGetdents = false
-
-func Getdents(dir string) ([]fuse.DirEntry, error) {
-	log.Panic("only implemented on Linux")
-	return nil, nil
+// emulateGetdents reads all directory entries from the open directory "fd"
+// and returns them in a fuse.DirEntry slice.
+func emulateGetdents(fd int) (out []fuse.DirEntry, err error) {
+	// os.File closes the fd in its finalizer. Duplicate the fd to not affect
+	// the original fd.
+	newFd, err := syscall.Dup(fd)
+	if err != nil {
+		return nil, err
+	}
+	f := os.NewFile(uintptr(newFd), "")
+	defer f.Close()
+	// Get all file names in the directory
+	names, err := f.Readdirnames(0)
+	if err != nil {
+		return nil, err
+	}
+	// Stat all of them and convert to fuse.DirEntry
+	out = make([]fuse.DirEntry, 0, len(names))
+	for _, name := range names {
+		var st unix.Stat_t
+		err = Fstatat(fd, name, &st, unix.AT_SYMLINK_NOFOLLOW)
+		if err == syscall.ENOENT {
+			// File disappeared between readdir and stat. Pretend we did not
+			// see it.
+			continue
+		}
+		if err != nil {
+			return nil, err
+		}
+		newEntry := fuse.DirEntry{
+			Name: name,
+			Mode: uint32(st.Mode) & syscall.S_IFMT,
+			Ino:  st.Ino,
+		}
+		out = append(out, newEntry)
+	}
+	return out, nil
 }