mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
6f5d6cb60d
* sysdeps/unix/sysv/linux/ftruncate64.c: Use it. * sysdeps/unix/sysv/linux/pread.c: Likewise. * sysdeps/unix/sysv/linux/pread64.c: Likewise. * sysdeps/unix/sysv/linux/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/pread.c: Likewise. * sysdeps/unix/sysv/linux/mips/pread64.c: Likewise. * sysdeps/unix/sysv/linux/mips/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/mips/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/mips/truncate64.c: Likewise.
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* Copyright (C) 1997, 1998, 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 <unistd.h>
|
|
#include <endian.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <kernel-features.h>
|
|
|
|
#if defined __NR_pread || __ASSUME_PREAD_SYSCALL > 0
|
|
|
|
# if __ASSUME_PREAD_SYSCALL == 0
|
|
static ssize_t __emulate_pread64 (int fd, void *buf, size_t count,
|
|
off64_t offset) internal_function;
|
|
# endif
|
|
|
|
extern ssize_t __syscall_pread (int fd, void *buf, size_t count, int dummy,
|
|
off_t offset_hi, off_t offset_lo);
|
|
|
|
|
|
|
|
ssize_t
|
|
__libc_pread64 (fd, buf, count, offset)
|
|
int fd;
|
|
void *buf;
|
|
size_t count;
|
|
off64_t offset;
|
|
{
|
|
ssize_t result;
|
|
|
|
/* First try the syscall. */
|
|
result = INLINE_SYSCALL (pread, 6, fd, buf, count, 0,
|
|
__LONG_LONG_PAIR ((off_t) (offset >> 32),
|
|
(off_t) (offset & 0xffffffff)));
|
|
# if __ASSUME_PREAD_SYSCALL == 0
|
|
if (result == -1 && errno == ENOSYS)
|
|
/* No system call available. Use the emulation. */
|
|
result = __emulate_pread64 (fd, buf, count, offset);
|
|
# endif
|
|
return result;
|
|
}
|
|
|
|
weak_alias (__libc_pread64, __pread64)
|
|
weak_alias (__libc_pread64, pread64)
|
|
|
|
# define __libc_pread64(fd, buf, count, offset) \
|
|
static internal_function __emulate_pread64 (fd, buf, count, offset)
|
|
#endif
|
|
|
|
#if __ASSUME_PREAD_SYSCALL == 0
|
|
# include <sysdeps/posix/pread64.c>
|
|
#endif
|