fchownat

fchownat - change ownership of a file relative to a directory  file descriptor

#define _ATFILE_SOURCE
#include <unistd.h>
 I int fchownat(int  dirfd , const char * pathname ,
I              uid_t  owner , gid_t  group , int  flags );

The R 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 R 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 R AT_FDCWD , then pathname is interpreted relative to the current working directory of the calling process (like chown(2)). If R pathname is absolute, then dirfd is ignored. flags can either be 0, or include the following flag:

AT_SYMLINK_NOFOLLOW

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

The same errors that occur for chown(2) can also occur for R fchownat (). The following additional errors can occur for R fchownat ():

EBADF

EINVAL

ENOTDIR

R fchownat () was added to Linux in kernel 2.6.16.

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

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

chown(2), openat(2), path_resolution(7)