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[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / pwritev.c

/* Copyright (C) 2009-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <sys/uio.h>
#include <sysdep-cancel.h>

#ifndef __OFF_T_MATCHES_OFF64_T

# ifdef __ASSUME_PREADV

#  ifndef __NR_pwritev
#   define __NR_pwritev __NR_pwritev64
#  endif

ssize_t
pwritev (int fd, const struct iovec *vector, int count, off_t offset)
{
  return SYSCALL_CANCEL (pwritev, fd, vector, count, LO_HI_LONG (offset));
}
# else
static ssize_t __atomic_pwritev_replacement (int, const struct iovec *,
					     int, off_t);
ssize_t
pwritev (int fd, const struct iovec *vector, int count, off_t offset)
{
#  ifdef __NR_pwritev
  ssize_t result = SYSCALL_CANCEL (pwritev, fd, vector, count,
				   LO_HI_LONG (offset));
  if (result >= 0 || errno != ENOSYS)
    return result;
#  endif
  return __atomic_pwritev_replacement (fd, vector, count, offset);
}
#  define PWRITEV static __atomic_pwritev_replacement
#  define PWRITE __pwrite
#  define OFF_T off_t
#  include <sysdeps/posix/pwritev_common.c>
# endif /* __ASSUME_PREADV  */

libc_hidden_def (pwritev)
#endif