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NAME

       fchownat  -  change  ownership  of  a file relative to a directory file
       descriptor

SYNOPSIS

       #define _ATFILE_SOURCE
       #include <fcntl.h> /* Definition of AT_* constants */
       #include <unistd.h>

       int fchownat(int dirfd, const char *pathname,
                    uid_t owner, gid_t group, int flags);

DESCRIPTION

       The fchownat()  system  call  operates  in  exactly  the  same  way  as
       chown(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 chown(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 chown(2)).

       If pathname is absolute, then dirfd is ignored.

       flags can either be 0, or include the following flag:

       AT_SYMLINK_NOFOLLOW
              If pathname is a symbolic link, do not dereference  it:  instead
              operate  on  the  link  itself,  like  lchown(2).   (By default,
              fchownat() dereferences symbolic links, like chown(2).)

RETURN VALUE

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

ERRORS

       The  same errors that occur for chown(2) can also occur for fchownat().
       The following additional errors can occur for fchownat():

       EBADF  dirfd is not a valid file descriptor.

       EINVAL Invalid flag specified in flags.

       ENOTDIR
              pathname is relative and dirfd is a file descriptor referring to
              a file other than a directory.

VERSIONS

       fchownat() was added to Linux in kernel 2.6.16.

CONFORMING TO

       POSIX.1-2008.  A similar system call exists on Solaris.

NOTES

       See openat(2) for an explanation of the need for fchownat().

SEE ALSO

       chown(2), openat(2), path_resolution(7), symlink(7)

COLOPHON

       This  page  is  part of release 3.23 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/.