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 */
int futimesat(int dirfd, const char *pathname,
const struct timeval times);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
This system call is obsolete.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 er-
rno 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.
If pathname is NULL, then the glibc futimesat() wrapper function up-
dates the times for the file referred to by dirfd.
stat(2), utimensat(2), utimes(2), futimes(3), path_resolution(7)
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Linux 2017-09-15 FUTIMESAT(2)