sysdeps/unix/sysv/linux/s390/s390-32/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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <sysdep.h>
  21 #include <kernel-features.h>
  22
  23 int __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise);
  24 int __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise);
  25
  26 /* Advice the system about the expected behaviour of the application with
  27    respect to the file associated with FD.  */
  28
  29 struct fadvise64_64_layout
  30 {
  31   int fd;
  32   off64_t offset;
  33   off64_t len;
  34   int advise;
  35 };
  36
  37 int
  38 __posix_fadvise64_l64 (int fd, off64_t offset, off64_t len, int advise)
  39 {
  40 #ifdef __NR_fadvise64_64
  41   struct fadvise64_64_layout parameters;
  42   INTERNAL_SYSCALL_DECL (err);
  43
  44   parameters.fd = fd;
  45   parameters.offset = offset;
  46   parameters.len = len;
  47   parameters.advise = advise;
  48   int ret = INTERNAL_SYSCALL (fadvise64_64, err, 1, &parameters);
  49   if (!INTERNAL_SYSCALL_ERROR_P (ret, err))
  50     return 0;
  51 # ifndef __ASSUME_FADVISE64_64_SYSCALL
  52   if (INTERNAL_SYSCALL_ERRNO (ret, err) != ENOSYS)
  53 # endif
  54    return INTERNAL_SYSCALL_ERRNO (ret, err);
  55 #endif
  56 #ifndef __ASSUME_FADVISE64_64_SYSCALL
  57 # ifdef __NR_fadvise64
  58   if (len != (off_t) len)
  59     return EOVERFLOW;
  60
  61   INTERNAL_SYSCALL_DECL (err2);
  62   int ret2 = INTERNAL_SYSCALL (fadvise64, err2, 5, fd,
  63                                __LONG_LONG_PAIR ((long) (offset >> 32),
  64                                                  (long) offset),
  65                                (off_t) len, advise);
  66   if (!INTERNAL_SYSCALL_ERROR_P (ret2, err2))
  67     return 0;
  68   return INTERNAL_SYSCALL_ERRNO (ret2, err2);
  69 # else
  70   return ENOSYS;
  71 # endif
  72 #endif
  73 }
  74
  75 #include <shlib-compat.h>
  76
  77 #if SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
  78
  79 int
  80 attribute_compat_text_section
  81 __posix_fadvise64_l32 (int fd, off64_t offset, size_t len, int advise)
  82 {
  83   return __posix_fadvise64_l64 (fd, offset, len, advise);
  84 }
  85
  86 versioned_symbol (libc, __posix_fadvise64_l64, posix_fadvise64, GLIBC_2_3_3);
  87 compat_symbol (libc, __posix_fadvise64_l32, posix_fadvise64, GLIBC_2_2);
  88 #else
  89 strong_alias (__posix_fadvise64_l64, posix_fadvise64);
  90 #endif