1FCHOWNAT(2)                Linux Programmer's Manual               FCHOWNAT(2)
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NAME

6       fchownat  -  change  ownership  of  a file relative to a directory file
7       descriptor
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SYNOPSIS

10       #define _ATFILE_SOURCE
11       #include <fcntl.h> /* Definition of AT_* constants */
12       #include <unistd.h>
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14       int fchownat(int dirfd, const char *pathname,
15                    uid_t owner, gid_t group, int flags);
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DESCRIPTION

18       The fchownat()  system  call  operates  in  exactly  the  same  way  as
19       chown(2), except for the differences described in this manual page.
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21       If  the  pathname given in pathname is relative, then it is interpreted
22       relative to the directory referred to  by  the  file  descriptor  dirfd
23       (rather  than  relative to the current working directory of the calling
24       process, as is done by chown(2) for a relative pathname).
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26       If pathname is relative and dirfd is the special value  AT_FDCWD,  then
27       pathname  is  interpreted  relative to the current working directory of
28       the calling process (like chown(2)).
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30       If pathname is absolute, then dirfd is ignored.
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32       flags can either be 0, or include the following flag:
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34       AT_SYMLINK_NOFOLLOW
35              If pathname is a symbolic link, do not dereference  it:  instead
36              operate on the link itself, like lchown(2).  (By default, fchow‐
37              nat() dereferences symbolic links, like chown(2).)
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RETURN VALUE

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

44       The  same errors that occur for chown(2) can also occur for fchownat().
45       The following additional errors can occur for fchownat():
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47       EBADF  dirfd is not a valid file descriptor.
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49       EINVAL Invalid flag specified in flags.
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51       ENOTDIR
52              pathname is relative and dirfd is a file descriptor referring to
53              a file other than a directory.
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VERSIONS

56       fchownat() was added to Linux in kernel 2.6.16.
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CONFORMING TO

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

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

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

68       This  page  is  part of release 3.22 of the Linux man-pages project.  A
69       description of the project, and information about reporting  bugs,  can
70       be found at http://www.kernel.org/doc/man-pages/.
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74Linux                             2008-08-21                       FCHOWNAT(2)
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