/usr/share/gocode/src/github.com/hanwen/go-fuse/fuse/direntry.go is in golang-github-hanwen-go-fuse-dev 0.0~git20171124.0.14c3015-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | // Copyright 2016 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 fuse
// all of the code for DirEntryList.
import (
"fmt"
"unsafe"
)
var eightPadding [8]byte
const direntSize = int(unsafe.Sizeof(_Dirent{}))
// DirEntry is a type for PathFileSystem and NodeFileSystem to return
// directory contents in.
type DirEntry struct {
// Mode is the file's mode. Only the high bits (eg. S_IFDIR)
// are considered.
Mode uint32
// Name is the basename of the file in the directory.
Name string
// Ino is the inode number.
Ino uint64
}
func (d DirEntry) String() string {
return fmt.Sprintf("%o: %q ino=%d", d.Mode, d.Name, d.Ino)
}
// DirEntryList holds the return value for READDIR and READDIRPLUS
// opcodes.
type DirEntryList struct {
buf []byte
size int
offset uint64
}
// NewDirEntryList creates a DirEntryList with the given data buffer
// and offset.
func NewDirEntryList(data []byte, off uint64) *DirEntryList {
return &DirEntryList{
buf: data[:0],
size: len(data),
offset: off,
}
}
// AddDirEntry tries to add an entry, and reports whether it
// succeeded.
func (l *DirEntryList) AddDirEntry(e DirEntry) (bool, uint64) {
return l.Add(0, e.Name, e.Ino, e.Mode)
}
// Add adds a direntry to the DirEntryList, returning whether it
// succeeded.
func (l *DirEntryList) Add(prefix int, name string, inode uint64, mode uint32) (bool, uint64) {
if inode == 0 {
inode = FUSE_UNKNOWN_INO
}
padding := (8 - len(name)&7) & 7
delta := padding + direntSize + len(name) + prefix
oldLen := len(l.buf)
newLen := delta + oldLen
if newLen > l.size {
return false, l.offset
}
l.buf = l.buf[:newLen]
oldLen += prefix
dirent := (*_Dirent)(unsafe.Pointer(&l.buf[oldLen]))
dirent.Off = l.offset + 1
dirent.Ino = inode
dirent.NameLen = uint32(len(name))
dirent.Typ = (mode & 0170000) >> 12
oldLen += direntSize
copy(l.buf[oldLen:], name)
oldLen += len(name)
if padding > 0 {
copy(l.buf[oldLen:], eightPadding[:padding])
}
l.offset = dirent.Off
return true, l.offset
}
// AddDirLookupEntry is used for ReadDirPlus. It serializes a DirEntry
// and returns the space for entry. If no space is left, returns a nil
// pointer.
func (l *DirEntryList) AddDirLookupEntry(e DirEntry) (*EntryOut, uint64) {
lastStart := len(l.buf)
ok, off := l.Add(int(unsafe.Sizeof(EntryOut{})), e.Name,
e.Ino, e.Mode)
if !ok {
return nil, off
}
return (*EntryOut)(unsafe.Pointer(&l.buf[lastStart])), off
}
func (l *DirEntryList) bytes() []byte {
return l.buf
}
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