futimesat - change timestamps of a file relative to a directory file descriptor
#include <fcntl.h> /* Definition of AT_* constants */
int futimesat(int dirfd, const char *pathname,
const struct timeval times);
Feature Test Macro Requirements for glibc (see feature_test_macros
This system call is obsolete. Use utimensat
() system call operates in exactly the same way as
(2), except for the differences described in this manual page.
If the pathname given in pathname
is relative, then it is interpreted
relative to the directory referred to by the file descriptor dirfd
(rather than relative to the current working directory of the calling process,
as is done by utimes
(2) for a relative pathname).
is relative and dirfd
is the special value
, then pathname
is interpreted relative to the current
working directory of the calling process (like utimes
is absolute, then dirfd
On success, futimesat
() returns a 0. On error, -1 is returned and
is set to indicate the error.
The same errors that occur for utimes
(2) can also occur for
(). The following additional errors can occur for
- dirfd is not a valid file descriptor.
- pathname is relative and dirfd is a file descriptor
referring to a file other than a directory.
() was added to Linux in kernel 2.6.16; library support was
added to glibc in version 2.4.
This system call is nonstandard. It was implemented from a specification that
was proposed for POSIX.1, but that specification was replaced by the one for
A similar system call exists on Solaris.
is NULL, then the glibc futimesat
() wrapper function
updates the times for the file referred to by dirfd