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       #include <fcntl.h> /* Definition of AT_* constants */
11       #include <unistd.h>
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13       int fchownat(int dirfd, const char *pathname,
14                    uid_t owner, gid_t group, int flags);
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16   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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18       fchownat():
19       Since glibc 2.10: _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
20       Before glibc 2.10: _ATFILE_SOURCE
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DESCRIPTION

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

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

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

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

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

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

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

73       This  page  is  part of release 3.25 of the Linux man-pages project.  A
74       description of the project, and information about reporting  bugs,  can
75       be found at http://www.kernel.org/doc/man-pages/.
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79Linux                             2009-12-13                       FCHOWNAT(2)
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