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package fusefrontend_reverse
import (
"context"
"sync"
"syscall"
"github.com/hanwen/go-fuse/v2/fs"
"github.com/hanwen/go-fuse/v2/fuse"
)
var _ = (fs.NodeOpener)((*VirtualConfNode)(nil))
var _ = (fs.NodeGetattrer)((*VirtualConfNode)(nil))
type VirtualConfNode struct {
fs.Inode
path string
}
// rootNode returns the Root Node of the filesystem.
func (n *VirtualConfNode) rootNode() *RootNode {
return n.Root().Operations().(*RootNode)
}
func (n *VirtualConfNode) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
fd, err := syscall.Open(n.path, syscall.O_RDONLY, 0)
if err != nil {
errno = fs.ToErrno(err)
return
}
fh = &VirtualConfFile{fd: fd}
return
}
func (n *VirtualConfNode) Getattr(ctx context.Context, fh fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
var st syscall.Stat_t
err := syscall.Stat(n.path, &st)
if err != nil {
return fs.ToErrno(err)
}
out.FromStat(&st)
rn := n.rootNode()
if rn.args.ForceOwner != nil {
out.Owner = *rn.args.ForceOwner
}
return 0
}
// Check that we have implemented the fs.File* interfaces
var _ = (fs.FileReader)((*VirtualConfFile)(nil))
var _ = (fs.FileReleaser)((*VirtualConfFile)(nil))
type VirtualConfFile struct {
mu sync.Mutex
fd int
}
func (f *VirtualConfFile) Read(ctx context.Context, buf []byte, off int64) (res fuse.ReadResult, errno syscall.Errno) {
f.mu.Lock()
defer f.mu.Unlock()
res = fuse.ReadResultFd(uintptr(f.fd), off, len(buf))
return
}
func (f *VirtualConfFile) Release(ctx context.Context) syscall.Errno {
f.mu.Lock()
defer f.mu.Unlock()
if f.fd != -1 {
err := syscall.Close(f.fd)
f.fd = -1
return fs.ToErrno(err)
}
return syscall.EBADF
}
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