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// +build linux darwin
package util
import (
"os"
"sync"
"syscall"
)
type hardlinkDeviceAndInode struct {
device, inode uint64
}
type HardlinkChecker struct {
hardlinks sync.Map
}
func (h *HardlinkChecker) Check(fi os.FileInfo) string {
if st, ok := fi.Sys().(*syscall.Stat_t); ok && fi.Mode().IsRegular() && st.Nlink > 1 {
if name, ok := h.hardlinks.Load(makeHardlinkDeviceAndInode(st)); ok && name.(string) != "" {
return name.(string)
}
}
return ""
}
func (h *HardlinkChecker) Add(fi os.FileInfo, name string) {
if st, ok := fi.Sys().(*syscall.Stat_t); ok && fi.Mode().IsRegular() && st.Nlink > 1 {
h.hardlinks.Store(makeHardlinkDeviceAndInode(st), name)
}
}
func UID(st os.FileInfo) int {
return int(st.Sys().(*syscall.Stat_t).Uid)
}
func GID(st os.FileInfo) int {
return int(st.Sys().(*syscall.Stat_t).Gid)
}
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