| 292 | } |
| 293 | |
| 294 | func findUsername(uid uint32) (string, error) { |
| 295 | b, err := os.ReadFile("/etc/passwd") |
| 296 | if err != nil { |
| 297 | return "", fmt.Errorf("read file: %w", err) |
| 298 | } |
| 299 | |
| 300 | for _, line := range strings.Split(string(b), "\n") { |
| 301 | parts := strings.Split(line, ":") |
| 302 | if len(parts) != 7 { |
| 303 | continue |
| 304 | } |
| 305 | parsed, err := strconv.Atoi(parts[2]) |
| 306 | if err != nil { |
| 307 | continue |
| 308 | } |
| 309 | if parsed == int(uid) { |
| 310 | return parts[0], nil |
| 311 | } |
| 312 | } |
| 313 | return "", fmt.Errorf("not found") |
| 314 | } |
| 315 | |
| 316 | func htons(x uint16) uint16 { return (x&0xff)<<8 | (x >> 8) } |