resident_projection_unix.go RawHistoryFolder

1//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
2
3package subagents
4
5import (
6	"bytes"
7	"io"
8	"os"
9
10	"golang.org/x/sys/unix"
11)
12
13func residentProjectionCurrent(path string, data []byte) bool {
14	fd, err := unix.Open(path, unix.O_RDONLY|unix.O_CLOEXEC|unix.O_NOFOLLOW, 0)
15	if err != nil {
16		return false
17	}
18	file := os.NewFile(uintptr(fd), path)
19	if file == nil {
20		_ = unix.Close(fd)
21		return false
22	}
23	defer file.Close()
24
25	info, err := file.Stat()
26	if err != nil || !info.Mode().IsRegular() || info.Mode().Perm() != 0o600 {
27		return false
28	}
29	current, err := io.ReadAll(file)
30	return err == nil && bytes.Equal(current, data)
31}