root/usr/lib/posix/file/

[..]
  1. Makefile.inc
  2. __file.c
  3. access.c
  4. chdir.c
  5. chmod.c
  6. chown.c
  7. close.c
  8. closedir.c
  9. creat.c
  10. dup.c
  11. dup2.c
  12. fchdir.c
  13. fcntl.c
  14. fstat.c
  15. fsync.c
  16. ftruncate.c
  17. getcwd.c
  18. ioctl.c
  19. isatty.c
  20. link.c
  21. lseek.c
  22. lstat.c
  23. mkdir.c
  24. mknod.c
  25. mount.c
  26. open.c
  27. opendir.c
  28. pipe.c
  29. read.c
  30. readdir.c
  31. rename.c
  32. rewinddir.c
  33. rmdir.c
  34. stat.c
  35. sync.c
  36. truncate.c
  37. umask.c
  38. umount.c
  39. unlink.c
  40. write.c
[..]