func (fs *unionFS) Open(name string, flags uint32, context *fuse.Context) (fuseFile nodefs.File, status fuse.Status) {
if name == _DROP_CACHE {
if flags&fuse.O_ANYWRITE != 0 {
log.Println("Forced cache drop on", fs)
fs.DropBranchCache(nil)
fs.DropDeletionCache()
fs.DropSubFsCaches()
fs.nodeFs.ForgetClientInodes()
}
return nodefs.NewDevNullFile(), fuse.OK
}
r := fs.getBranch(name)
if r.branch < 0 {
// This should not happen, as a GetAttr() should have
// already verified existence.
log.Println("UnionFs: open of non-existent file:", name)
return nil, fuse.ENOENT
}
if flags&fuse.O_ANYWRITE != 0 && r.branch > 0 {
code := fs.Promote(name, r, context)
if code != fuse.OK {
return nil, code
}
r.branch = 0
now := time.Now()
r.attr.SetTimes(nil, &now, nil)
fs.branchCache.Set(name, r)
}
fuseFile, status = fs.fileSystems[r.branch].Open(name, uint32(flags), context)
if fuseFile != nil {
fuseFile = fs.newUnionFsFile(fuseFile, r.branch)
}
return fuseFile, status
}
func (fs *autoUnionFs) Open(path string, flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
if path == filepath.Join(_STATUS, _DEBUG) {
if flags&fuse.O_ANYWRITE != 0 {
return nil, fuse.EPERM
}
return nodefs.NewDataFile([]byte(fs.DebugData())), fuse.OK
}
if path == filepath.Join(_STATUS, _VERSION) {
if flags&fuse.O_ANYWRITE != 0 {
return nil, fuse.EPERM
}
return nodefs.NewDataFile([]byte(fs.options.Version)), fuse.OK
}
if path == filepath.Join(_CONFIG, _SCAN_CONFIG) {
if flags&fuse.O_ANYWRITE != 0 {
fs.updateKnownFses()
}
return nodefs.NewDevNullFile(), fuse.OK
}
return nil, fuse.ENOENT
}
