posix_fallocate — allocate file space
#define _XOPEN_SOURCE 600 #include <fcnlt.h>
int
posix_fallocate( |
int | fd, |
| off_t | offset, | |
| off_t | len); |
The function posix_fallocate() ensures that disk space
is allocated for the file referred to by the descriptor
fd for the bytes in
the range starting at offset and continuing for
len bytes. After a
successful call to posix_fallocate(), subsequent writes to
bytes in the specified range are guaranteed not to fail
because of lack of disk space.
If the size of the file is less than offset+len, then the file is increased
to this size; otherwise the file size is left unchanged.
posix_fallocate() returns
zero on success, or an error number on failure. Note that
errno is not set.
fd is not a
valid file descriptor, or is not opened for
writing.
offset+len
exceeds the maximum file size.
offset or
len was less
than 0.
fd does not
refer to a regular file.
There is not enough space left on the device
containing the file referred to by fd.
fd refers to
a pipe of file descriptor.
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
|
Copyright (c) 2006, Michael Kerrisk <mtk.manpagesgmail.com> Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. |