Obtains maximum length of a path, not including the terminating zero
| 287 | |
| 288 | // Obtains maximum length of a path, not including the terminating zero |
| 289 | inline std::size_t get_path_max() |
| 290 | { |
| 291 | // this code is based on Stevens and Rago, Advanced Programming in the |
| 292 | // UNIX envirnment, 2nd Ed., ISBN 0-201-43307-9, page 49 |
| 293 | std::size_t max = 0; |
| 294 | errno = 0; |
| 295 | long res = ::pathconf("/", _PC_PATH_MAX); |
| 296 | if (res < 0) |
| 297 | { |
| 298 | #if defined(PATH_MAX) |
| 299 | max = PATH_MAX; |
| 300 | #else |
| 301 | max = 4096; |
| 302 | #endif |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | max = static_cast< std::size_t >(res); // relative root |
| 307 | #if defined(PATH_MAX) |
| 308 | if (max < PATH_MAX) |
| 309 | max = PATH_MAX; |
| 310 | #endif |
| 311 | } |
| 312 | |
| 313 | if ((max + 1) < sizeof(dirent().d_name)) |
| 314 | max = sizeof(dirent().d_name) - 1; |
| 315 | |
| 316 | return max; |
| 317 | } |
| 318 | |
| 319 | // Returns maximum length of a path, not including the terminating zero |
| 320 | inline std::size_t path_max() |