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// Copyright 2019 the Go-FUSE Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package fs
import (
"context"
"fmt"
"hash/crc32"
"os"
"syscall"
"testing"
"github.com/hanwen/go-fuse/v2/fuse"
)
type randomTypeTest struct {
Inode
}
var _ = (NodeLookuper)((*randomTypeTest)(nil))
var _ = (NodeReaddirer)((*randomTypeTest)(nil))
// Lookup finds a dir.
func (fn *randomTypeTest) Lookup(ctx context.Context, name string, out *fuse.EntryOut) (*Inode, syscall.Errno) {
stable := StableAttr{
Mode: fuse.S_IFDIR,
}
// Override the file type on a pseudo-random subset of entries
if crc32.ChecksumIEEE([]byte(name))%2 == 0 {
stable.Mode = fuse.S_IFREG
}
childFN := &randomTypeTest{}
child := fn.NewInode(ctx, childFN, stable)
return child, syscall.F_OK
}
// Readdir will always return one child dir.
func (fn *randomTypeTest) Readdir(ctx context.Context) (DirStream, syscall.Errno) {
var entries []fuse.DirEntry
for i := 0; i < 100; i++ {
entries = append(entries, fuse.DirEntry{
Name: fmt.Sprintf("%d", i),
Mode: fuse.S_IFDIR,
})
}
return NewListDirStream(entries), syscall.F_OK
}
// TestReaddirTypeFixup tests that DirEntryList.FixMode() works as expected.
func TestReaddirTypeFixup(t *testing.T) {
root := &randomTypeTest{}
mntDir, _, clean := testMount(t, root, nil)
defer clean()
f, err := os.Open(mntDir)
if err != nil {
t.Fatalf("open: %v", err)
}
defer f.Close()
// (Ab)use loopbackDirStream to call and parse getdents(2) on mntDir.
// This makes the kernel call READDIRPLUS, which ultimately calls
// randomTypeTest.Readdir() and randomTypeTest.Lookup() above.
ds, errno := NewLoopbackDirStream(mntDir)
if errno != 0 {
t.Fatalf("readdir: %v", err)
}
defer ds.Close()
for ds.HasNext() {
e, err := ds.Next()
if err != 0 {
t.Errorf("Next: %d", err)
}
t.Logf("%q: mode=0x%x", e.Name, e.Mode)
gotIsDir := (e.Mode & syscall.S_IFDIR) != 0
wantIsdir := (crc32.ChecksumIEEE([]byte(e.Name)) % 2) == 1
if gotIsDir != wantIsdir {
t.Errorf("%q: isdir %v, want %v", e.Name, gotIsDir, wantIsdir)
}
}
}
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