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



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.

       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 3.25 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/.



Linux                                                      2009-12-13                                                FCHOWNAT(2)