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FUTIMESAT(2) Linux Programmer's Manual FUTIMESAT(2)


     futimesat  -  change  timestamps of a file relative to a directory file


     #include <fcntl.h> /* Definition of AT_* constants */
     #include <sys/time.h>
     int futimesat(int dirfd, const char *pathname,
                   const struct timeval times[2]);
 Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
     futimesat(): _GNU_SOURCE


     This system call is obsolete.  Use utimensat(2) instead.
     The futimesat() system  call  operates  in  exactly  the  same  way  as
     utimes(2), except for the differences described in this manual page.
     If  the  pathname given in pathname is relative, then it is interpreted
     relative to the directory referred to  by  the  file  descriptor  dirfd
     (rather  than  relative to the current working directory of the calling
     process, as is done by utimes(2) for a relative pathname).
     If pathname is relative and dirfd is the special value  AT_FDCWD,  then
     pathname  is  interpreted  relative to the current working directory of
     the calling process (like utimes(2)).
     If pathname is absolute, then dirfd is ignored.


     On success, futimesat() returns a 0.  On  error,  -1  is  returned  and
     errno is set to indicate the error.


     The  same  errors  that  occur for utimes(2) can also occur for futime-
     sat().  The following additional errors can occur for futimesat():
     EBADF  dirfd is not a valid file descriptor.
            pathname is relative and dirfd is a file descriptor referring to
            a file other than a directory.


     futimesat()  was  added  to Linux in kernel 2.6.16; library support was
     added to glibc in version 2.4.


     This system call is nonstandard.  It was implemented from a  specifica-
     tion that was proposed for POSIX.1, but that specification was replaced
     by the one for utimensat(2).
     A similar system call exists on Solaris.


 Glibc notes
     If pathname is  NULL,  then  the  glibc  futimesat()  wrapper  function
     updates the times for the file referred to by dirfd.


     stat(2), utimensat(2), utimes(2), futimes(3), path_resolution(7)


     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

Linux 2017-09-15 FUTIMESAT(2)

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