62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
package syscallcompat
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import (
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"os"
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"syscall"
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"golang.org/x/sys/unix"
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"github.com/hanwen/go-fuse/v2/fuse"
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)
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func fillDirEntries(fd int, names []string) ([]fuse.DirEntry, error) {
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out := make([]fuse.DirEntry, 0, len(names))
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for _, name := range names {
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var st unix.Stat_t
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err := Fstatat(fd, name, &st, unix.AT_SYMLINK_NOFOLLOW)
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if err == syscall.ENOENT {
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// File disappeared between readdir and stat. Pretend we did not
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// see it.
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continue
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}
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if err != nil {
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return nil, err
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}
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newEntry := fuse.DirEntry{
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Name: name,
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Mode: uint32(st.Mode) & syscall.S_IFMT,
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Ino: st.Ino,
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}
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out = append(out, newEntry)
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}
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return out, nil
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}
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// emulateGetdents reads all directory entries from the open directory "fd"
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// and returns normal entries and "." / ".." split into two slices.
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func emulateGetdents(fd int) (out []fuse.DirEntry, outSpecial []fuse.DirEntry, err error) {
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// os.File closes the fd in its finalizer. Duplicate the fd to not affect
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// the original fd.
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newFd, err := syscall.Dup(fd)
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if err != nil {
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return nil, nil, err
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}
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f := os.NewFile(uintptr(newFd), "")
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defer f.Close()
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// Get all file names in the directory
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names, err := f.Readdirnames(0)
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if err != nil {
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return nil, nil, err
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}
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// Stat all the names and convert to fuse.DirEntry
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out, err = fillDirEntries(fd, names)
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if err != nil {
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return nil, nil, err
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}
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outSpecial, err = fillDirEntries(fd, []string{".", ".."})
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if err != nil {
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return nil, nil, err
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}
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return out, outSpecial, nil
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}
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