/*
-goredo -- redo implementation on pure Go
-Copyright (C) 2020-2021 Sergey Matveev <stargrave@stargrave.org>
+goredo -- djb's redo implementation on pure Go
+Copyright (C) 2020-2023 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
"golang.org/x/sys/unix"
)
-const EnvInodeNoTrust = "REDO_INODE_NO_TRUST"
+type InodeTrustType int
-var InodeTrust bool = false
+//go:generate stringer -type=InodeTrustType
+const (
+ EnvInodeTrust = "REDO_INODE_TRUST"
+
+ InodeTrustNone InodeTrustType = iota
+ InodeTrustCtime
+ InodeTrustMtime
+)
+
+var InodeTrust InodeTrustType
type Inode struct {
Size int64
+ InodeNum uint64
CtimeSec int64
CtimeNsec int64
+ MtimeSec int64
+ MtimeNsec int64
}
func (our *Inode) Equals(their *Inode) bool {
- return (our.Size == their.Size) &&
- (our.CtimeSec == their.CtimeSec) &&
- (our.CtimeNsec == their.CtimeNsec)
+ if our.Size != their.Size {
+ return false
+ }
+ if our.InodeNum != their.InodeNum {
+ return false
+ }
+ switch InodeTrust {
+ case InodeTrustCtime:
+ if our.CtimeSec != their.CtimeSec || our.CtimeNsec != their.CtimeNsec {
+ return false
+ }
+ case InodeTrustMtime:
+ if our.MtimeSec == 0 || our.MtimeNsec == 0 {
+ return false
+ }
+ if our.MtimeSec != their.MtimeSec || our.MtimeNsec != their.MtimeNsec {
+ return false
+ }
+ }
+ return true
}
func (inode *Inode) RecfileFields() []recfile.Field {
return []recfile.Field{
{Name: "Size", Value: strconv.FormatInt(inode.Size, 10)},
+ {Name: "InodeNum", Value: strconv.FormatUint(inode.InodeNum, 10)},
{Name: "CtimeSec", Value: strconv.FormatInt(inode.CtimeSec, 10)},
{Name: "CtimeNsec", Value: strconv.FormatInt(inode.CtimeNsec, 10)},
+ {Name: "MtimeSec", Value: strconv.FormatInt(inode.MtimeSec, 10)},
+ {Name: "MtimeNsec", Value: strconv.FormatInt(inode.MtimeNsec, 10)},
}
}
-func inodeFromFile(fd *os.File) (*Inode, error) {
- var fi os.FileInfo
+func inodeFromFileStat(fi os.FileInfo, stat unix.Stat_t) *Inode {
+ ctimeSec, ctimeNsec := stat.Ctim.Unix()
+ mtimeSec := fi.ModTime().Unix()
+ mtimeNsec := fi.ModTime().UnixNano()
+ return &Inode{
+ Size: fi.Size(),
+ InodeNum: uint64(stat.Ino),
+ CtimeSec: ctimeSec, CtimeNsec: ctimeNsec,
+ MtimeSec: mtimeSec, MtimeNsec: mtimeNsec,
+ }
+}
+
+func inodeFromFileByFd(fd *os.File) (*Inode, error) {
fi, err := fd.Stat()
if err != nil {
return nil, err
if err != nil {
return nil, err
}
- sec, nsec := stat.Ctim.Unix()
- return &Inode{Size: fi.Size(), CtimeSec: sec, CtimeNsec: nsec}, nil
+ return inodeFromFileStat(fi, stat), nil
+}
+
+func inodeFromFileByPath(p string) (*Inode, error) {
+ fi, err := os.Stat(p)
+ if err != nil {
+ return nil, err
+ }
+ var stat unix.Stat_t
+ err = unix.Stat(p, &stat)
+ if err != nil {
+ return nil, err
+ }
+ return inodeFromFileStat(fi, stat), nil
}
func inodeFromRec(m map[string]string) (*Inode, error) {
size := m["Size"]
+ inodeNum := m["InodeNum"]
ctimeSec := m["CtimeSec"]
ctimeNsec := m["CtimeNsec"]
+ mtimeSec := m["MtimeSec"]
+ mtimeNsec := m["MtimeNsec"]
if size == "" {
return nil, errors.New("Size is missing")
}
if err != nil {
return nil, err
}
+ if inodeNum != "" {
+ inode.InodeNum, err = strconv.ParseUint(inodeNum, 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ }
inode.CtimeSec, err = strconv.ParseInt(ctimeSec, 10, 64)
if err != nil {
return nil, err
if err != nil {
return nil, err
}
+ if mtimeSec != "" {
+ if mtimeNsec == "" {
+ return nil, errors.New("MtimeNsec is missing")
+ }
+ inode.MtimeSec, err = strconv.ParseInt(mtimeSec, 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ inode.MtimeNsec, err = strconv.ParseInt(mtimeNsec, 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ }
return &inode, nil
}