NAME

       futimes, lutimes - change file timestamps

LIBRARY

       Standard C library (libc, -lc)

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 to indicate the
       error.

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 Linux 2.6.22.

ATTRIBUTES

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

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                      │ Attribute     │ Value   │
       ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │futimes(), lutimes()                                           │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       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)