d587d83bd9
* sysdeps/unix/sysv/linux/getrlimit.c: Remove K&R compatibility. * sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_TRUNCATE64_SYSCALL and __ASSUME_MMAP2_SYSCALL for 2.3.31 on x86. * sysdeps/unix/sysv/linux/ftruncate64.c: New file. * sysdeps/unix/sysv/linux/truncate64.c: New file. * sysdeps/unix/sysv/linux/i386/mmap.S: Allow using mmap2. * sysdeps/unix/sysv/linux/i386/mmap64.S: New file.
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* Copyright (C) 1997, 1998, 1999 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include "kernel-features.h"
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#ifdef __NR_truncate64
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static int have_no_truncate64;
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extern int __syscall_truncate64 (int fd, int high_length, int low_length);
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/* Truncate the file FD refers to to LENGTH bytes. */
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int
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truncate64 (path, length)
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const char *path;
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off64_t length;
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{
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#ifndef __ASSUME_TRUNCATE64_SYSCALL
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if (! have_no_truncate64)
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#endif
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{
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int result = INLINE_SYSCALL (truncate64, 3, path, length >> 32,
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length & 0xffffffff);
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#ifndef __ASSUME_TRUNCATE64_SYSCALL
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if (result != -1 || errno != ENOSYS)
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#endif
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return result;
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#ifndef __ASSUME_TRUNCATE64_SYSCALL
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have_no_truncate64 = 1;
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#endif
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}
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#ifndef __ASSUME_TRUNCATE64_SYSCALL
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if ((off_t) length != length)
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{
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__set_errno (EINVAL);
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return -1;
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}
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return truncate (path, (off_t) length);
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#endif
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}
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#else
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/* Use the generic implementation. */
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# include <sysdeps/generic/truncate64.c>
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#endif
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