fchownat man page on ElementaryOS

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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.

       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, fchow‐
	      nat() 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/.

Linux				  2013-07-21			   FCHOWNAT(2)
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