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69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* Long-long seek operation.
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Copyright (C) 1996,1997,1998,1999,2000,2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <sys/types.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include <nptl/pthreadP.h>
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#include <tls.h>
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extern int __syscall__llseek (int fd, off_t offset_hi, off_t offset_lo,
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loff_t *__unbounded result, int whence);
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/* Seek to OFFSET on FD, starting from WHENCE. */
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extern loff_t __llseek (int fd, loff_t offset, int whence);
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loff_t
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__llseek (int fd, loff_t offset, int whence)
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{
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loff_t result;
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#ifndef NOT_IN_libc
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if (__builtin_expect (THREAD_GETMEM (THREAD_SELF,
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header.data.multiple_threads) == 0, 1))
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return (loff_t) (INLINE_SYSCALL (_llseek, 5, fd, (off_t) (offset >> 32),
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(off_t) (offset & 0xffffffff),
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__ptrvalue (&result), whence) ?: result);
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int oldtype = LIBC_CANCEL_ASYNC ();
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#endif
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int retval = INLINE_SYSCALL (_llseek, 5, fd, (off_t) (offset >> 32),
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(off_t) (offset & 0xffffffff),
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__ptrvalue (&result), whence);
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#ifndef NOT_IN_libc
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LIBC_CANCEL_RESET (oldtype);
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#endif
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return (loff_t) (retval ?: result);
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}
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weak_alias (__llseek, llseek)
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strong_alias (__llseek, __libc_lseek64)
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strong_alias (__llseek, __lseek64)
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weak_alias (__llseek, lseek64)
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/* llseek doesn't have a prototype. Since the second parameter is a
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64bit type, this results in wrong behaviour if no prototype is
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provided. */
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link_warning (llseek, "\
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the `llseek' function may be dangerous; use `lseek64' instead.")
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