mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-19 03:20:05 +00:00
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
|
/* Copyright (C) 1997, 1998, 1999, 2000 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 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 <sys/types.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
#include <sys/syscall.h>
|
||
|
|
|
||
|
|
#include "kernel-features.h"
|
||
|
|
|
||
|
|
#ifdef __NR_truncate64
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
/* The variable is shared between all wrappers around *truncate64 calls. */
|
||
|
|
int have_no_truncate64;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern int __syscall_truncate64 (const char *path, off64_t length);
|
||
|
|
|
||
|
|
|
||
|
|
/* Truncate the file FD refers to to LENGTH bytes. */
|
||
|
|
int
|
||
|
|
truncate64 (path, length)
|
||
|
|
const char *path;
|
||
|
|
off64_t length;
|
||
|
|
{
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
if (! have_no_truncate64)
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
int saved_errno = errno;
|
||
|
|
#endif
|
||
|
|
int result = __syscall_truncate64 (path, length);
|
||
|
|
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
if (result != -1 || errno != ENOSYS)
|
||
|
|
#endif
|
||
|
|
return result;
|
||
|
|
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
__set_errno (saved_errno);
|
||
|
|
have_no_truncate64 = 1;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef __ASSUME_TRUNCATE64_SYSCALL
|
||
|
|
if ((off_t) length != length)
|
||
|
|
{
|
||
|
|
__set_errno (EINVAL);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
return truncate (path, (off_t) length);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|
||
|
|
/* Use the generic implementation. */
|
||
|
|
# include <sysdeps/generic/truncate64.c>
|
||
|
|
#endif
|