fchownat — change ownership of a file relative to a directory file descriptor
#define _ATFILE_SOURCE #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) ; |
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.
flags
can either
be 0, or include the following flag:
On success, 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
fchownat
(). The following
additional errors can occur for fchownat
():
dirfd
is not
a valid file descriptor.
Invalid flag specified in flags
.
pathname
is
relative and dirfd
is a file
descriptor referring to a file other than a
directory.
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.