sysdeps/unix/sysv/linux/powerpc/powerpc32/posix_fadvise64.c

   1 /* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <sysdep.h>
  22 #include <kernel-features.h>
  23
  24 int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
  25 int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
  26
  27 /* Advice the system about the expected behaviour of the application with
  28    respect to the file associated with FD.  */
  29
  30 int
  31 __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
  32 {
  33 #ifdef __NR_fadvise64_64
  34   INTERNAL_SYSCALL_DECL (err);
  35   int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd, advise,
  36                               __LONG_LONG_PAIR ((long)(offset >> 32), (long)offset),
  37                               __LONG_LONG_PAIR ((long)(len >> 32), (long)len));
  38   if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
  39     return 0;
  40 # ifndef __ASSUME_FADVISE64_64_SYSCALL
  41   if (INTERNAL_SYSCALL_ERRNO (ret, err) != ENOSYS)
  42 # endif
  43    return INTERNAL_SYSCALL_ERRNO (ret, err);
  44 #endif
  45 #ifndef __ASSUME_FADVISE64_64_SYSCALL
  46 # ifdef __NR_fadvise64
  47   if (len != (off_t) len)
  48     return EOVERFLOW;
  49
  50   INTERNAL_SYSCALL_DECL (err2);
  51   int ret2 = INTERNAL_SYSCALL (fadvise64, err2, 6, fd, 0,
  52                                __LONG_LONG_PAIR ((long)(offset >> 32), (long)offset),
  53                                (off_t) len, advise);
  54   if (!INTERNAL_SYSCALL_ERROR_P (ret2, err2))
  55     return 0;
  56   return INTERNAL_SYSCALL_ERRNO (ret2, err2);
  57 # else
  58   return ENOSYS;
  59 # endif
  60 #endif
  61 }
  62
  63 #include <shlib-compat.h>
  64
  65 #if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
  66
  67 int
  68 attribute_compat_text_section
  69 __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
  70 {
  71   return __posix_fadvise64_l64 (fd, offset, len, advise);
  72 }
  73
  74 versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
  75 compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
  76 #else
  77 strong_alias (__posix_fadvise64_l64, posix_fadvise64);
  78 #endif