121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package sftp
|
|
|
|
// ssh_FXP_ATTRS support
|
|
// see https://filezilla-project.org/specs/draft-ietf-secsh-filexfer-02.txt#section-5
|
|
|
|
import (
|
|
"os"
|
|
"time"
|
|
)
|
|
|
|
const (
|
|
sshFileXferAttrSize = 0x00000001
|
|
sshFileXferAttrUIDGID = 0x00000002
|
|
sshFileXferAttrPermissions = 0x00000004
|
|
sshFileXferAttrACmodTime = 0x00000008
|
|
sshFileXferAttrExtended = 0x80000000
|
|
|
|
sshFileXferAttrAll = sshFileXferAttrSize | sshFileXferAttrUIDGID | sshFileXferAttrPermissions |
|
|
sshFileXferAttrACmodTime | sshFileXferAttrExtended
|
|
)
|
|
|
|
// fileInfo is an artificial type designed to satisfy os.FileInfo.
|
|
type fileInfo struct {
|
|
name string
|
|
stat *FileStat
|
|
}
|
|
|
|
// Name returns the base name of the file.
|
|
func (fi *fileInfo) Name() string { return fi.name }
|
|
|
|
// Size returns the length in bytes for regular files; system-dependent for others.
|
|
func (fi *fileInfo) Size() int64 { return int64(fi.stat.Size) }
|
|
|
|
// Mode returns file mode bits.
|
|
func (fi *fileInfo) Mode() os.FileMode { return toFileMode(fi.stat.Mode) }
|
|
|
|
// ModTime returns the last modification time of the file.
|
|
func (fi *fileInfo) ModTime() time.Time { return time.Unix(int64(fi.stat.Mtime), 0) }
|
|
|
|
// IsDir returns true if the file is a directory.
|
|
func (fi *fileInfo) IsDir() bool { return fi.Mode().IsDir() }
|
|
|
|
func (fi *fileInfo) Sys() interface{} { return fi.stat }
|
|
|
|
// FileStat holds the original unmarshalled values from a call to READDIR or
|
|
// *STAT. It is exported for the purposes of accessing the raw values via
|
|
// os.FileInfo.Sys(). It is also used server side to store the unmarshalled
|
|
// values for SetStat.
|
|
type FileStat struct {
|
|
Size uint64
|
|
Mode uint32
|
|
Mtime uint32
|
|
Atime uint32
|
|
UID uint32
|
|
GID uint32
|
|
Extended []StatExtended
|
|
}
|
|
|
|
// StatExtended contains additional, extended information for a FileStat.
|
|
type StatExtended struct {
|
|
ExtType string
|
|
ExtData string
|
|
}
|
|
|
|
func fileInfoFromStat(stat *FileStat, name string) os.FileInfo {
|
|
return &fileInfo{
|
|
name: name,
|
|
stat: stat,
|
|
}
|
|
}
|
|
|
|
// FileInfoUidGid extends os.FileInfo and adds callbacks for Uid and Gid retrieval,
|
|
// as an alternative to *syscall.Stat_t objects on unix systems.
|
|
type FileInfoUidGid interface {
|
|
os.FileInfo
|
|
Uid() uint32
|
|
Gid() uint32
|
|
}
|
|
|
|
// FileInfoUidGid extends os.FileInfo and adds a callbacks for extended data retrieval.
|
|
type FileInfoExtendedData interface {
|
|
os.FileInfo
|
|
Extended() []StatExtended
|
|
}
|
|
|
|
func fileStatFromInfo(fi os.FileInfo) (uint32, *FileStat) {
|
|
mtime := fi.ModTime().Unix()
|
|
atime := mtime
|
|
var flags uint32 = sshFileXferAttrSize |
|
|
sshFileXferAttrPermissions |
|
|
sshFileXferAttrACmodTime
|
|
|
|
fileStat := &FileStat{
|
|
Size: uint64(fi.Size()),
|
|
Mode: fromFileMode(fi.Mode()),
|
|
Mtime: uint32(mtime),
|
|
Atime: uint32(atime),
|
|
}
|
|
|
|
// os specific file stat decoding
|
|
fileStatFromInfoOs(fi, &flags, fileStat)
|
|
|
|
// The call above will include the sshFileXferAttrUIDGID in case
|
|
// the os.FileInfo can be casted to *syscall.Stat_t on unix.
|
|
// If fi implements FileInfoUidGid, retrieve Uid, Gid from it instead.
|
|
if fiExt, ok := fi.(FileInfoUidGid); ok {
|
|
flags |= sshFileXferAttrUIDGID
|
|
fileStat.UID = fiExt.Uid()
|
|
fileStat.GID = fiExt.Gid()
|
|
}
|
|
|
|
// if fi implements FileInfoExtendedData, retrieve extended data from it
|
|
if fiExt, ok := fi.(FileInfoExtendedData); ok {
|
|
fileStat.Extended = fiExt.Extended()
|
|
if len(fileStat.Extended) > 0 {
|
|
flags |= sshFileXferAttrExtended
|
|
}
|
|
}
|
|
|
|
return flags, fileStat
|
|
}
|