GENWiki

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():
         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  time-
     stamps 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  time-
     stamps 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).

     allbox;  lbw20  lb  lb  l l l.  Interface Attribute Value T{ futimes(),
     lutimes() T}   Thread safety  MT-Safe

CONFORMING TO

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