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1 /* Copyright (C) 1997,1998,1999,2000,2002,2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 #include <sys/types.h>
24 #include <sys/syscall.h>
25 #include <bp-checks.h>
27 #include "kernel-features.h"
29 #ifdef __NR_truncate64
30 #ifndef __ASSUME_TRUNCATE64_SYSCALL
31 /* The variable is shared between all wrappers around *truncate64 calls. */
32 int __have_no_truncate64
;
36 /* Truncate the file FD refers to to LENGTH bytes. */
38 truncate64 (path
, length
)
42 #ifndef __ASSUME_TRUNCATE64_SYSCALL
43 if (! __have_no_truncate64
)
46 #ifndef __ASSUME_TRUNCATE64_SYSCALL
47 int saved_errno
= errno
;
49 /* On PPC32 64bit values are aligned in odd/even register pairs. */
50 int result
= INLINE_SYSCALL (truncate64
, 4, CHECK_STRING (path
), 0,
51 (long) (length
>> 32),
54 #ifndef __ASSUME_TRUNCATE64_SYSCALL
55 if (result
!= -1 || errno
!= ENOSYS
)
59 #ifndef __ASSUME_TRUNCATE64_SYSCALL
60 __set_errno (saved_errno
);
61 __have_no_truncate64
= 1;
65 #ifndef __ASSUME_TRUNCATE64_SYSCALL
66 if ((off_t
) length
!= length
)
71 return __truncate (path
, (off_t
) length
);
76 /* Use the generic implementation. */
77 # include <sysdeps/generic/truncate64.c>
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