llseek.c 1.2 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * llseek/lseek64 syscall for uClibc
  4. *
  5. * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  6. *
  7. * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  8. */
  9. #include <unistd.h>
  10. #include <sys/types.h>
  11. #include <sys/syscall.h>
  12. extern __typeof(lseek64) __libc_lseek64;
  13. #if defined __NR__llseek && defined __UCLIBC_HAS_LFS__
  14. # ifndef INLINE_SYSCALL
  15. # define INLINE_SYSCALL(name, nr, args...) __syscall_llseek (args)
  16. # define __NR___syscall_llseek __NR__llseek
  17. static __inline__ _syscall5(int, __syscall_llseek, int, fd, off_t, offset_hi,
  18. off_t, offset_lo, loff_t *, result, int, whence);
  19. # endif
  20. loff_t __libc_lseek64(int fd, loff_t offset, int whence)
  21. {
  22. loff_t result;
  23. return(loff_t)(INLINE_SYSCALL (_llseek, 5, fd, (off_t) (offset >> 32),
  24. (off_t) (offset & 0xffffffff), &result, whence) ?: result);
  25. }
  26. #else
  27. extern __typeof(lseek) __libc_lseek;
  28. libc_hidden_proto(__libc_lseek)
  29. loff_t __libc_lseek64(int fd, loff_t offset, int whence)
  30. {
  31. return(loff_t)(__libc_lseek(fd, (off_t) (offset), whence));
  32. }
  33. #endif
  34. libc_hidden_proto(lseek64)
  35. weak_alias(__libc_lseek64,lseek64)
  36. libc_hidden_weak(lseek64)
  37. /*strong_alias(__libc_lseek64,_llseek) */