readdir64_r.c 1.6 KB

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  1. #include <features.h>
  2. #ifdef __UCLIBC_HAS_LFS__
  3. #if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS != 64
  4. #undef _FILE_OFFSET_BITS
  5. #define _FILE_OFFSET_BITS 64
  6. #endif
  7. #ifndef __USE_LARGEFILE64
  8. # define __USE_LARGEFILE64 1
  9. #endif
  10. /* We absolutely do _NOT_ want interfaces silently
  11. * renamed under us or very bad things will happen... */
  12. #ifdef __USE_FILE_OFFSET64
  13. # undef __USE_FILE_OFFSET64
  14. #endif
  15. #include <errno.h>
  16. #include <stdlib.h>
  17. #include <string.h>
  18. #include <unistd.h>
  19. #include <dirent.h>
  20. #include "dirstream.h"
  21. int readdir64_r(DIR *dir, struct dirent64 *entry, struct dirent64 **result)
  22. {
  23. int ret;
  24. ssize_t bytes;
  25. struct dirent64 *de;
  26. if (!dir) {
  27. __set_errno(EBADF);
  28. return(EBADF);
  29. }
  30. de = NULL;
  31. #ifdef __UCLIBC_HAS_THREADS__
  32. pthread_mutex_lock(&(dir->dd_lock));
  33. #endif
  34. do {
  35. if (dir->dd_size <= dir->dd_nextloc) {
  36. /* read dir->dd_max bytes of directory entries. */
  37. bytes = __getdents64(dir->dd_fd, dir->dd_buf, dir->dd_max);
  38. if (bytes <= 0) {
  39. *result = NULL;
  40. ret = errno;
  41. goto all_done;
  42. }
  43. dir->dd_size = bytes;
  44. dir->dd_nextloc = 0;
  45. }
  46. de = (struct dirent64 *) (((char *) dir->dd_buf) + dir->dd_nextloc);
  47. /* Am I right? H.J. */
  48. dir->dd_nextloc += de->d_reclen;
  49. /* We have to save the next offset here. */
  50. dir->dd_nextoff = de->d_off;
  51. /* Skip deleted files. */
  52. } while (de->d_ino == 0);
  53. if (de == NULL) {
  54. *result = NULL;
  55. } else {
  56. *result = memcpy (entry, de, de->d_reclen);
  57. }
  58. ret = 0;
  59. all_done:
  60. #ifdef __UCLIBC_HAS_THREADS__
  61. pthread_mutex_unlock(&(dir->dd_lock));
  62. #endif
  63. return((de != NULL)? 0 : ret);
  64. }
  65. #endif /* __UCLIBC_HAS_LFS__ */