syscallcompat: implement Getdents()

The Readdir function provided by os is inherently slow because
it calls Lstat on all files.

Getdents gives us all the information we need, but does not have
a proper wrapper in the stdlib.

Implement the "Getdents()" wrapper function that calls
syscall.Getdents() and parses the returned byte blob to a
fuse.DirEntry slice.

1 files changed, 17 insertions, 0 deletions

diff --git a/internal/syscallcompat/getdents_other.go b/internal/syscallcompat/getdents_other.go
new file mode 100644
index 0000000..4ef5b8f
--- /dev/null
+++ b/internal/syscallcompat/getdents_other.go
@@ -0,0 +1,17 @@
+// +build !linux
+
+package syscallcompat
+
+import (
+	"log"
+
+	"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
+}