readdir64.c 1.5 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071
  1. #include <features.h>
  2. #ifdef __UCLIBC_HAVE_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 <dirent.h>
  16. #include <errno.h>
  17. #include <stdlib.h>
  18. #include <string.h>
  19. #include <unistd.h>
  20. #include <dirent.h>
  21. #include "dirstream.h"
  22. extern int getdents64 __P ((unsigned int fd, struct dirent64 *dirp, unsigned int count));
  23. struct dirent64 *readdir64(DIR * dir)
  24. {
  25. ssize_t bytes;
  26. struct dirent64 *de;
  27. if (!dir) {
  28. __set_errno(EBADF);
  29. return NULL;
  30. }
  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. de = NULL;
  40. goto all_done;
  41. }
  42. dir->dd_size = bytes;
  43. dir->dd_nextloc = 0;
  44. }
  45. de = (struct dirent64 *) (((char *) dir->dd_buf) + dir->dd_nextloc);
  46. /* Am I right? H.J. */
  47. dir->dd_nextloc += de->d_reclen;
  48. /* We have to save the next offset here. */
  49. dir->dd_nextoff = de->d_off;
  50. /* Skip deleted files. */
  51. } while (de->d_ino == 0);
  52. all_done:
  53. #ifdef __UCLIBC_HAS_THREADS__
  54. pthread_mutex_unlock(&(dir->dd_lock));
  55. #endif
  56. return de;
  57. }
  58. #endif /* __UCLIBC_HAVE_LFS__ */