mirror of https://github.com/rclone/rclone
103 lines
3.1 KiB
Go
103 lines
3.1 KiB
Go
//go:build linux
|
|
// +build linux
|
|
|
|
package local
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/rclone/rclone/fs"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
var (
|
|
statxCheckOnce sync.Once
|
|
readMetadataFromFileFn func(o *Object, m *fs.Metadata) (err error)
|
|
)
|
|
|
|
// Read the metadata from the file into metadata where possible
|
|
func (o *Object) readMetadataFromFile(m *fs.Metadata) (err error) {
|
|
statxCheckOnce.Do(func() {
|
|
// Check statx() is available as it was only introduced in kernel 4.11
|
|
// If not, fall back to fstatat() which was introduced in 2.6.16 which is guaranteed for all Go versions
|
|
var stat unix.Statx_t
|
|
if unix.Statx(unix.AT_FDCWD, ".", 0, unix.STATX_ALL, &stat) != unix.ENOSYS {
|
|
readMetadataFromFileFn = readMetadataFromFileStatx
|
|
} else {
|
|
readMetadataFromFileFn = readMetadataFromFileFstatat
|
|
}
|
|
})
|
|
return readMetadataFromFileFn(o, m)
|
|
}
|
|
|
|
// Read the metadata from the file into metadata where possible
|
|
func readMetadataFromFileStatx(o *Object, m *fs.Metadata) (err error) {
|
|
flags := unix.AT_SYMLINK_NOFOLLOW
|
|
if o.fs.opt.FollowSymlinks {
|
|
flags = 0
|
|
}
|
|
var stat unix.Statx_t
|
|
// statx() was added to Linux in kernel 4.11
|
|
err = unix.Statx(unix.AT_FDCWD, o.path, flags, (0 |
|
|
unix.STATX_TYPE | // Want stx_mode & S_IFMT
|
|
unix.STATX_MODE | // Want stx_mode & ~S_IFMT
|
|
unix.STATX_UID | // Want stx_uid
|
|
unix.STATX_GID | // Want stx_gid
|
|
unix.STATX_ATIME | // Want stx_atime
|
|
unix.STATX_MTIME | // Want stx_mtime
|
|
unix.STATX_CTIME | // Want stx_ctime
|
|
unix.STATX_BTIME), // Want stx_btime
|
|
&stat)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m.Set("mode", fmt.Sprintf("%0o", stat.Mode))
|
|
m.Set("uid", fmt.Sprintf("%d", stat.Uid))
|
|
m.Set("gid", fmt.Sprintf("%d", stat.Gid))
|
|
if stat.Rdev_major != 0 || stat.Rdev_minor != 0 {
|
|
m.Set("rdev", fmt.Sprintf("%x", uint64(stat.Rdev_major)<<32|uint64(stat.Rdev_minor)))
|
|
}
|
|
setTime := func(key string, t unix.StatxTimestamp) {
|
|
m.Set(key, time.Unix(t.Sec, int64(t.Nsec)).Format(metadataTimeFormat))
|
|
}
|
|
setTime("atime", stat.Atime)
|
|
setTime("mtime", stat.Mtime)
|
|
setTime("btime", stat.Btime)
|
|
return nil
|
|
}
|
|
|
|
// Read the metadata from the file into metadata where possible
|
|
func readMetadataFromFileFstatat(o *Object, m *fs.Metadata) (err error) {
|
|
flags := unix.AT_SYMLINK_NOFOLLOW
|
|
if o.fs.opt.FollowSymlinks {
|
|
flags = 0
|
|
}
|
|
var stat unix.Stat_t
|
|
// fstatat() was added to Linux in kernel 2.6.16
|
|
// Go only supports 2.6.32 or later
|
|
err = unix.Fstatat(unix.AT_FDCWD, o.path, &stat, flags)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m.Set("mode", fmt.Sprintf("%0o", stat.Mode))
|
|
m.Set("uid", fmt.Sprintf("%d", stat.Uid))
|
|
m.Set("gid", fmt.Sprintf("%d", stat.Gid))
|
|
if stat.Rdev != 0 {
|
|
m.Set("rdev", fmt.Sprintf("%x", stat.Rdev))
|
|
}
|
|
setTime := func(key string, t unix.Timespec) {
|
|
// The types of t.Sec and t.Nsec vary from int32 to int64 on
|
|
// different Linux architectures so we need to cast them to
|
|
// int64 here and hence need to quiet the linter about
|
|
// unnecessary casts.
|
|
//
|
|
// nolint: unconvert
|
|
m.Set(key, time.Unix(int64(t.Sec), int64(t.Nsec)).Format(metadataTimeFormat))
|
|
}
|
|
setTime("atime", stat.Atim)
|
|
setTime("mtime", stat.Mtim)
|
|
return nil
|
|
}
|