//go:build unix

package host

import (
	"io/fs"
	"syscall"
)

// fileOwner reports a file's owning uid and gid. Split by build tag because
// internal/host is linked into the CLI, which people run on Macs and Windows,
// and syscall.Stat_t does not exist everywhere — the gate cross-compiles all
// five targets for exactly this reason.
func fileOwner(fi fs.FileInfo) (uid, gid int, ok bool) {
	st, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return 0, 0, false
	}
	return int(st.Uid), int(st.Gid), true
}

// fileInode reports a file's device and inode, so a cache can tell a file
// replaced at the same path from the one it hashed. Same split as fileOwner.
func fileInode(fi fs.FileInfo) (dev, ino uint64, ok bool) {
	st, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return 0, 0, false
	}
	return uint64(st.Dev), uint64(st.Ino), true
}