/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <errno.h> #include <endian.h> #include <unistd.h> #include <sysdep.h> #include <sys/syscall.h> #include "kernel-features.h" #if defined __NR_pwrite || __ASSUME_PWRITE_SYSCALL > 0 /* The order of hi, lo depends on endianness. */ extern ssize_t __syscall_pwrite (int fd, const void *buf, size_t count, off_t offset_hi, off_t offset_lo); # if __ASSUME_PWRITE_SYSCALL == 0 static ssize_t __emulate_pwrite (int fd, const void *buf, size_t count, off_t offset) internal_function; # endif ssize_t __libc_pwrite (fd, buf, count, offset) int fd; const void *buf; size_t count; off_t offset; { ssize_t result; /* First try the syscall. */ # if __BYTE_ORDER == __LITTLE_ENDIAN result = INLINE_SYSCALL (pwrite, 5, fd, buf, count, offset, 0); # elif __BYTE_ORDER == __BIG_ENDIAN result = INLINE_SYSCALL (pwrite, 5, fd, buf, count, 0, offset); # endif # if __ASSUME_PWRITE_SYSCALL == 0 if (result == -1 && errno == ENOSYS) /* No system call available. Use the emulation. */ result = __emulate_pwrite (fd, buf, count, offset); # endif return result; } strong_alias (__libc_pwrite, __pwrite) weak_alias (__libc_pwrite, pwrite) # define __libc_pwrite(fd, buf, count, offset) \ static internal_function __emulate_pwrite (fd, buf, count, offset) #endif #if __ASSUME_PWRITE_SYSCALL == 0 # include <sysdeps/posix/pwrite.c> #endif