2 * ftruncate64 syscall. Copes with 64 bit and 32 bit machines
3 * and on 32 bit machines this sends things into the kernel as
4 * two 32-bit arguments (high and low 32 bits of length) that
5 * are ordered based on endianess. It turns out endian.h has
6 * just the macro we need to order things (__LONG_LONG_PAIR).
8 * Copyright (C) 2002 Erik Andersen <andersen@codepoet.org>
10 * This file is subject to the terms and conditions of the GNU
11 * Lesser General Public License. See the file COPYING.LIB in
12 * the main directory of this archive for more details.
20 #include <sys/syscall.h>
22 #if defined __UCLIBC_HAVE_LFS__ && defined __NR_ftruncate64
23 #if (__WORDSIZE == 64)
24 /* For a 64 bit machine, life is simple... */
25 _syscall2(int, ftruncate64, int, fd, __off64_t, length);
26 #elif (__WORDSIZE == 32)
27 #define __NR___ftruncate64 __NR_ftruncate64
28 static inline _syscall3(int, __ftruncate64, int, fd, int, high_length, int, low_length);
29 /* The exported ftruncate64 function. */
30 int ftruncate64 (int fd, __off64_t length)
32 unsigned int low = length & 0xffffffff;
33 unsigned int high = length >> 32;
34 return __ftruncate64(fd, __LONG_LONG_PAIR (high, low));
37 #error Your machine is not 64 bit or 32 bit, I am dazed and confused.
39 #endif /* __UCLIBC_HAVE_LFS__ */