Name

futimes, lutimes — change file timestamps

Synopsis

#include <sys/time.h>
int futimes( int fd,
  const struct timeval tv[2]);
 
int lutimes( const char *filename,
  const struct timeval tv[2]);
 
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
futimes(), lutimes():
_BSD_SOURCE

DESCRIPTION

futimes() changes the access and modification times of a file in the same way as utimes(2), with the difference that the file whose timestamps are to be changed is specified via a file descriptor, fd, rather than via a pathname.

lutimes() changes the access and modification times of a file in the same way as utimes(2), with the difference that if filename refers to a symbolic link, then the link is not dereferenced: instead, the timestamps of the symbolic link are changed.

RETURN VALUE

On success, zero is returned. On error, −1 is returned, and errno is set appropriately.

ERRORS

Errors are as for utimes(2), with the following additions for futimes():

EBADF

fd is not a valid file descriptor.

ENOSYS

The /proc file system could not be accessed.

The following additional error may occur for lutimes():

ENOSYS

The kernel does not support this call; Linux 2.6.22 or later is required.

VERSIONS

futimes() is available since glibc 2.3. lutimes() is available since glibc 2.6, and is implemented using the utimensat(2) system call, which is supported since kernel 2.6.22.

CONFORMING TO

These functions are not specified in any standard. Other than Linux, they are available only on the BSDs.

SEE ALSO

utime(2), utimensat(2), symlink(7)

COLOPHON

This page is part of release 3.52 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, 2008, Michael Kerrisk

%%%LICENSE_START(VERBATIM)
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manual page may be incorrect or out-of-date.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.
%%%LICENSE_END