| 67 | } |
| 68 | |
| 69 | func secureMasterSocket(sockPath string) error { |
| 70 | if err := os.Chmod(sockPath, masterSocketFilePerm); err != nil { |
| 71 | return fmt.Errorf("chmod master socket %s failed: %w", sockPath, err) |
| 72 | } |
| 73 | info, err := os.Stat(sockPath) |
| 74 | if err != nil { |
| 75 | return fmt.Errorf("stat master socket %s failed: %w", sockPath, err) |
| 76 | } |
| 77 | if info.Mode().Perm()&masterSocketFilePermMask != 0 { |
| 78 | return fmt.Errorf("master socket %s permission %#o is too permissive", sockPath, info.Mode().Perm()) |
| 79 | } |
| 80 | stat, ok := info.Sys().(*syscall.Stat_t) |
| 81 | if !ok { |
| 82 | return nil |
| 83 | } |
| 84 | if int(stat.Uid) != os.Geteuid() { |
| 85 | return fmt.Errorf( |
| 86 | "master socket %s owner uid %d does not match current process uid %d", |
| 87 | sockPath, stat.Uid, os.Geteuid(), |
| 88 | ) |
| 89 | } |
| 90 | return nil |
| 91 | } |
| 92 | |
| 93 | func Start() { |
| 94 | re.Init() |