glibc/sysdeps/posix/posix_fallocate64.c
Ulrich Drepper 4a381a81fe Update.
2004-03-10  Ulrich Drepper  <drepper@redhat.com>

	* include/libc-symbols.h: Define attribute_compat_text_section and
	attribute_compat_data_section.
	* io/ftw.c: Mark compat code with attribute_compat_text_section.
	* libio/iofopncook.c: Likewise.
	* libio/oldfileops.c: Likewise.
	* libio/oldiofclose.c: Likewise.
	* libio/oldiofdopen.c: Likewise.
	* libio/oldiofgetpos.c: Likewise.
	* libio/oldiofgetpos64.c: Likewise.
	* libio/oldiofopen.c: Likewise.
	* libio/oldiofsetpos.c: Likewise.
	* libio/oldiofsetpos64.c: Likewise.
	* libio/oldiopopen.c: Likewise.
	* libio/oldpclose.c: Likewise.
	* libio/oldtmpfile.c: Likewise.
	* nptl/forward.c: Likewise.
	* nss/getXXbyYY_r.c: Likewise.
	* nss/getXXent_r.c: Likewise.
	* posix/tst-vfork1.c: Likewise.
	* stdlib/canonicalize.c: Likewise.
	* stdlib/old_atexit.c: Likewise.
	* sysdeps/generic/glob.c: Likewise.
	* sysdeps/posix/posix_fallocate64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/alphasort64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/chown.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/glob64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/msgctl.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/oldgetrlimit64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/posix_fadvise64.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/readdir64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/readdir64_r.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/semctl.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/shmctl.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/versionsort64.c: Likewise.

	* sysdeps/unix/sysv/linux/i386/syscalls.list: vm86@@GLIBC_2.3.4
	should be the default symbol. Having none misses the point.
2004-03-10 09:29:17 +00:00

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/* Copyright (C) 2000, 2003, 2004 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/statfs.h>
/* Reserve storage for the data of the file associated with FD. */
int
__posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len)
{
struct stat64 st;
struct statfs64 f;
size_t step;
/* `off64_t´ is a signed type. Therefore we can determine whether
OFFSET + LEN is too large if it is a negative value. */
if (offset < 0 || len < 0)
return EINVAL;
if (offset + len < 0)
return EFBIG;
/* First thing we have to make sure is that this is really a regular
file. */
if (__fxstat64 (_STAT_VER, fd, &st) != 0)
return EBADF;
if (S_ISFIFO (st.st_mode))
return ESPIPE;
if (! S_ISREG (st.st_mode))
return ENODEV;
/* We have to know the block size of the filesystem to get at least some
sort of performance. */
if (__fstatfs64 (fd, &f) != 0)
return errno;
/* Align OFFSET to block size and adjust LEN. */
step = (offset + f.f_bsize - 1) % ~f.f_bsize;
offset += step;
/* Write something to every block. */
while (len > step)
{
len -= step;
if (__pwrite64 (fd, "", 1, offset) != 1)
return errno;
offset += step;
}
return 0;
}
#include <shlib-compat.h>
#include <bits/wordsize.h>
#if __WORDSIZE == 32 && SHLIB_COMPAT(libc, GLIBC_2_2, GLIBC_2_3_3)
int
attribute_compat_text_section
__posix_fallocate64_l32 (int fd, off64_t offset, size_t len)
{
return __posix_fallocate64_l64 (fd, offset, len);
}
versioned_symbol (libc, __posix_fallocate64_l64, posix_fallocate64,
GLIBC_2_3_3);
compat_symbol (libc, __posix_fallocate64_l32, posix_fallocate64, GLIBC_2_2);
#else
strong_alias (__posix_fallocate64_l64, posix_fallocate64);
#endif