mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-23 03:10:05 +00:00
bb8e0116cd
2000-04-14 Ulrich Drepper <drepper@redhat.com> * include/sys/statfs.h: Add prototypes for __statfs64 and __fstatfs64. * sysdeps/generic/fstatfs64.c (__fstatfs64): Renamed to fstatfs64. Make old name weak alias. * sysdeps/unix/sysv/linux/fstatfs64.c: Likewise. * sysdeps/generic/statfs64.c (__statfs64): Renamed to statfs64. Make old name weak alias. * sysdeps/unix/sysv/linux/statfs64.c: Likewise. * io/Makefile (routines): Add posix_fadvise, posix_fadvise64, posix_fallocate, and posix_fallocate64. * io/Versions [libc] (GLIBC_2.2): Add posix_fadvise, posix_fadvise64, posix_fallocate, and posix_fallocate64. * io/fcntl.h: Declare posix_fadvise, posix_fadvise64, posix_fallocate, and posix_fallocate64. * sysdeps/generic/fadvise.c: New file. * sysdeps/generic/fadvise64.c: New file. * sysdeps/generic/fallocate.c: New file. * sysdeps/generic/fallocate64.c: New file. * sysdeps/posix/fallocate.c: New file. * sysdeps/posix/fallocate64.c: New file. * sysdeps/generic/bits/fcntl.h: Define POSIX_FADV_NORMAL, POSIX_FADV_RANDOM, POSIX_FADV_SEQUENTIAL, POSIX_FADV_WILLNEED, POSIX_FADV_DONTNEED, and POSIX_FADV_NOREUSE. * sysdeps/mach/hurd/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/i386/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/fcntl.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Likewise. * sysdeps/generic/madvise.c (__madvise): Renamed to posix_madvise. * sysdeps/unix/sysv/linux/syscalls.list: Likewise.
72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
/* Copyright (C) 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 <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 (int fd, __off64_t offset, size_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;
|
||
}
|