lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-29 11:41:21 +03:00
Code Activity

Remove __ASSUME_TRUNCATE64_SYSCALL.

Browse Source
This commit is contained in:
Joseph Myers
2012-05-30 14:52:34 +00:00
parent 4da0431d5f
commit 3a85279c0b
6 changed files with 54 additions and 194 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
sysdeps/unix/sysv/linux/truncate64.c
View File

@ -1,5 +1,4 @@
/* Copyright (C) 1997-2000,2003,2004,2005,2006,2011
Free Software Foundation, Inc.
/* Copyright (C) 1997-2012 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
@ -25,51 +24,13 @@
#include <sys/syscall.h>
#include <bp-checks.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
/* Truncate the file referenced by FD to LENGTH bytes. */
int
truncate64 (const char *path, off64_t length)
{
#ifndef __ASSUME_TRUNCATE64_SYSCALL
if (! __have_no_truncate64)
#endif
{
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
#ifndef __ASSUME_TRUNCATE64_SYSCALL
int saved_errno = errno;
#endif
int result = INLINE_SYSCALL (truncate64, 3, CHECK_STRING (path),
__LONG_LONG_PAIR (high, low));
#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
unsigned int low = length & 0xffffffff;
unsigned int high = length >> 32;
int result = INLINE_SYSCALL (truncate64, 3, CHECK_STRING (path),
__LONG_LONG_PAIR (high, low));
return result;
}
#else
/* Use the generic implementation. */
# include <misc/truncate64.c>
#endif