NAME

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

SYNOPSIS

       #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);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fchownat():
           Since glibc 2.10:
               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _ATFILE_SOURCE

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.

       The flags argument is a bit mask created by ORing together 0 or more of the following values;

       AT_EMPTY_PATH (since Linux 2.6.39)
              If  pathname  is  an  empty  string, operate on the file referred to by dirfd (which may have been
              obtained using the open(2) O_PATH flag).  In this case, dirfd can refer to any type of  file,  not
              just a directory.

       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; library support was added to glibc in version 2.4.

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 3.54 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/.