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.

ATTRIBUTES

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

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

STANDARDS

       Linux, BSD.

HISTORY

       futimes()
              glibc 2.3.

       lutimes()
              glibc 2.6.

NOTES

       lutimes() is implemented using the utimensat(2) system call.

SEE ALSO

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