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.TH FUTIMES 3 2008-04-07 "Linux" "Linux Programmer's Manual"
.SH NAME
futimes, lutimes \- change file timestamps
.SH SYNOPSIS
.nf
.B #include <sys/time.h>

.BI "int futimes(int " fd ", const struct timeval " tv [2]);

.BI "int lutimes(const char *" filename ", const struct timeval " tv [2]);
.fi
.sp
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.sp
.BR futimes (),
.BR lutimes ():
_BSD_SOURCE
.SH DESCRIPTION
.BR futimes ()
changes the access and modification times of a file in the same way as
.BR utimes (2),
with the difference that the file whose timestamps are to be changed
is specified via a file descriptor,
.IR fd ,
rather than via a pathname.

.BR lutimes ()
changes the access and modification times of a file in the same way as
.BR utimes (2),
with the difference that if
.I filename
refers to a symbolic link, then the link is not dereferenced:
instead, the timestamps of the symbolic link are changed.
.SH "RETURN VALUE"
On success, zero is returned.
On error, \-1 is returned, and
.I errno
is set appropriately.
.SH ERRORS
Errors are as for
.BR utimes (2),
with the following additions for
.BR futimes ():
.TP
.B EBADF
.I fd
is not a valid file descriptor.
.TP
.B ENOSYS
The
.I /proc
file system could not be accessed.
.SH VERSIONS
.BR futimes ()
is available since glibc 2.3.
.BR lutimes ()
is available since glibc 2.6, and is implemented using the
.BR utimensat (2)
system call, which is supported since kernel 2.6.22.
.SH "CONFORMING TO"
These functions are not specified in any standard.
Other than Linux, they are only available on the BSDs.
.SH "SEE ALSO"
.BR utime (2),
.BR utimensat (2),
.BR symlink (7)
.SH COLOPHON
This page is part of release 3.44 of the Linux
.I man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.