futimesat(2)                  System Calls Manual                 futimesat(2)

NAME
       futimesat - change timestamps of a file relative to a directory file
       descriptor

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <fcntl.h>            /* Definition of AT_* constants */
       #include <sys/time.h>

       [[deprecated]] int futimesat(int dirfd, const char *path,
                                    const struct timeval times[2]);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       futimesat():
           _GNU_SOURCE

DESCRIPTION
       This system call is obsolete.  Use utimensat(2) instead.

       The futimesat() system call operates in exactly the same way as
       utimes(2), except for the differences described in this manual page.

       If path 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).

       If path is relative and dirfd is the special value AT_FDCWD, then path
       is interpreted relative to the current working directory of the calling
       process (like utimes(2)).

       If path is absolute, then dirfd is ignored.  (See openat(2) for an
       explanation of why the dirfd argument is useful.)

RETURN VALUE
       On success, futimesat() returns a 0.  On error, -1 is returned and
       errno is set to indicate the error.

ERRORS
       The same errors that occur for utimes(2) can also occur for
       futimesat().  The following additional errors can occur for
       futimesat():

       EBADF  path is relative but dirfd is neither AT_FDCWD nor a valid file
              descriptor.

       ENOTDIR
              path is relative and dirfd is a file descriptor referring to a
              file other than a directory.

VERSIONS
   glibc
       If path is NULL, then the glibc futimesat() wrapper function updates
       the times for the file referred to by dirfd.

STANDARDS
       None.

HISTORY
       Linux 2.6.16, glibc 2.4.

       It was implemented from a specification that was proposed for POSIX.1,
       but that specification was replaced by the one for utimensat(2).

       A similar system call exists on Solaris.

NOTES
SEE ALSO
       stat(2), utimensat(2), utimes(2), futimes(3), path_resolution(7)

Linux man-pages 6.14              2025-05-06                      futimesat(2)