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



NAME
       futimes, lutimes - change file timestamps

SYNOPSIS
       #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 feature_test_macros(7)):

       futimes(), lutimes(): _BSD_SOURCE

DESCRIPTION
       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  speci‐
       fied 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
       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

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

       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
       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
   Multithreading (see pthreads(7))
       The futimes() and lutimes() functions are thread-safe.

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

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

COLOPHON
       This  page  is  part of release 3.74 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 http://www.kernel.org/doc/man-pages/.



Linux                                       2013-10-29                                 FUTIMES(3)