futimes, lutimes - change file timestamps


   #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:
       Glibc 2.19 and earlier:


   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.


   On  success,  zero is returned.  On error, -1 is returned, and errno is
   set appropriately.


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

   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


   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.


   For  an  explanation  of  the  terms  used   in   this   section,   see

   Interface             Attribute      Value   
   futimes(), lutimes()  Thread safety  MT-Safe 


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


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


   This page is part of release 4.09 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


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.