futimes(3) — Linux manual page


FUTIMES(3)              Linux Programmer's Manual             FUTIMES(3)

NAME         top

       futimes, lutimes - change file timestamps

SYNOPSIS         top

       #include <sys/time.h>

       int futimes(int fd, const struct timeval tv[2]);
       int lutimes(const char *filename, const struct timeval tv[2]);

   Feature Test Macro Requirements for glibc (see

       futimes(), lutimes():
           Since glibc 2.19:
           Glibc 2.19 and earlier:

DESCRIPTION         top

       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         top

       On success, zero is returned.  On error, -1 is returned, and
       errno is set to indicate the error.

ERRORS         top

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

       EBADF  fd is not a valid file descriptor.

       ENOSYS The /proc filesystem 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         top

       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.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface                             Attribute     Value   │
       │futimes(), lutimes()                  │ Thread safety │ MT-Safe │

CONFORMING TO         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at

Linux                          2021-03-22                     FUTIMES(3)

Pages that refer to this page: futimesat(2)utime(2)utimensat(2)symlink(7)system_data_types(7)