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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():
           Since glibc 2.19:
               _DEFAULT_SOURCE
           Glibc 2.19 and earlier:
               _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
       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

       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

       For an explanation of the terms used in this section, see attributes(7).

       ┌─────────────────────┬───────────────┬─────────┐
       │InterfaceAttributeValue   │
       ├─────────────────────┼───────────────┼─────────┤
       │futimes(), lutimes() │ Thread safety │ MT-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 4.16 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 https://www.kernel.org/doc/man-pages/.