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renameat - rename a file relative to directory file descriptors
#include <fcntl.h> /* Definition of AT_* constants */
int renameat(int olddirfd, const char *oldpath,
int newdirfd, const char *newpath);
The renameat() system call operates in exactly the same way as
rename(2), except for the differences described in this manual page.
If the pathname given in oldpath is relative, then it is interpreted
relative to the directory referred to by the file descriptor olddirfd
(rather than relative to the current working directory of the calling
process, as is done by rename(2) for a relative pathname).
If oldpath is relative and olddirfd is the special value AT_FDCWD, then
oldpath is interpreted relative to the current working directory of the
calling process (like rename(2)).
If oldpath is absolute, then olddirfd is ignored.
The interpretation of newpath is as for oldpath, except that a relative
pathname is interpreted relative to the directory referred to by the
file descriptor newdirfd.
On success, renameat() returns 0. On error, -1 is returned and errno
is set to indicate the error.
The same errors that occur for rename(2) can also occur for renameat().
The following additional errors can occur for renameat():
EBADF olddirfd or newdirfd is not a valid file descriptor.
oldpath is relative and olddirfd is a file descriptor referring
to a file other than a directory; or similar for newpath and
renameat() was added to Linux in kernel 2.6.16.
This system call is non-standard but is proposed for inclusion in a
future revision of POSIX.1.
See openat(2) for an explanation of the need for renameat().
openat(2), rename(2), path_resolution(7)
This page is part of release 3.01 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.