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+'\" t
+.\" Copyright (c) 2006, 2008, Michael Kerrisk
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.TH futimes 3 2023-07-20 "Linux man-pages 6.05.01"
+.SH NAME
+futimes, lutimes \- change file timestamps
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <sys/time.h>
+.PP
+.BI "int futimes(int " fd ", const struct timeval " tv [2]);
+.BI "int lutimes(const char *" filename ", const struct timeval " tv [2]);
+.fi
+.PP
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.PP
+.BR futimes (),
+.BR lutimes ():
+.nf
+ Since glibc 2.19:
+ _DEFAULT_SOURCE
+ glibc 2.19 and earlier:
+ _BSD_SOURCE
+.fi
+.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.
+.PP
+.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 to indicate the error.
+.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
+filesystem could not be accessed.
+.PP
+The following additional error may occur for
+.BR lutimes ():
+.TP
+.B ENOSYS
+The kernel does not support this call; Linux 2.6.22 or later is required.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface Attribute Value
+T{
+.na
+.nh
+.BR futimes (),
+.BR lutimes ()
+T} Thread safety MT-Safe
+.TE
+.sp 1
+.SH STANDARDS
+Linux, BSD.
+.SH HISTORY
+.TP
+.BR futimes ()
+glibc 2.3.
+.TP
+.BR lutimes ()
+glibc 2.6.
+.SH NOTES
+.BR lutimes ()
+is implemented using the
+.BR utimensat (2)
+system call.
+.SH SEE ALSO
+.BR utime (2),
+.BR utimensat (2),
+.BR symlink (7)