/
diff.go
71 lines (65 loc) · 1.25 KB
/
diff.go
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package barrow
import (
"crypto/sha256"
"errors"
"fmt"
"io"
"os"
"os/user"
"syscall"
"github.com/naegelejd/go-acl/os/group"
)
func HasDirDiff(path, username, groupname string, mode os.FileMode) (bool, error) {
fi, err := os.Stat(path)
if err != nil {
if os.IsNotExist(err) {
return true, nil
}
return false, err
}
if !fi.IsDir() {
return false, errors.New("not a directory")
}
if (fi.Mode() - os.ModeDir) != mode {
return true, nil
}
uid := fi.Sys().(*syscall.Stat_t).Uid
gid := fi.Sys().(*syscall.Stat_t).Gid
u, err := user.LookupId(fmt.Sprint(uid))
if err != nil {
return false, err
}
g, err := group.LookupId(fmt.Sprint(gid))
if err != nil {
return false, err
}
if u.Username != username {
return true, nil
}
if g.Name != groupname {
return true, nil
}
return false, nil
}
func HasFileDiff(aPath, bPath string) (bool, error) {
a, err := sha256File(aPath)
if err != nil {
return false, err
}
b, err := sha256File(bPath)
if err != nil {
return false, err
}
return a != b, nil
}
func sha256File(path string) (string, error) {
h := sha256.New()
f, err := os.Open(path)
if err != nil {
return "", err
}
if _, err := io.Copy(h, f); err != nil {
return "", err
}
return fmt.Sprintf("%b", h.Sum(nil)), nil
}