fchownat(2)

1FCHOWNAT(2)                Linux Programmer's Manual               FCHOWNAT(2)
2
3
4

NAME

6       fchownat  -  change  ownership  of  a file relative to a directory file
7       descriptor
8

SYNOPSIS

10       #define _ATFILE_SOURCE
11       #include <unistd.h>
12
13       int fchownat(int dirfd, const char *pathname,
14                    uid_t owner, gid_t group, int flags);
15

DESCRIPTION

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

RETURN VALUE

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

ERRORS

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

NOTES

55       See openat(2) for an explanation of the need for fchownat().
56

CONFORMING TO

58       This  system  call  is  non-standard but is proposed for inclusion in a
59       future revision of POSIX.1.  A similar system call exists on Solaris.
60

VERSIONS

62       fchownat() was added to Linux in kernel 2.6.16.
63