Differential D17714 Diff 50274 head/lib/libc/sys/chmod.2

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head/lib/libc/sys/chmod.2

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	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT			.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.			.\" SUCH DAMAGE.
	.\"			.\"
	.\" @(#)chmod.2 8.1 (Berkeley) 6/4/93			.\" @(#)chmod.2 8.1 (Berkeley) 6/4/93
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd October 20, 2018			.Dd November 11, 2018
	.Dt CHMOD 2			.Dt CHMOD 2
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm chmod ,			.Nm chmod ,
	.Nm fchmod ,			.Nm fchmod ,
	.Nm lchmod ,			.Nm lchmod ,
	.Nm fchmodat			.Nm fchmodat
	.Nd change mode of file			.Nd change mode of file
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	.In fcntl.h :			.In fcntl.h :
	.Bl -tag -width indent			.Bl -tag -width indent
	.It Dv AT_SYMLINK_NOFOLLOW			.It Dv AT_SYMLINK_NOFOLLOW
	If			If
	.Fa path			.Fa path
	names a symbolic link, then the mode of the symbolic link is changed.			names a symbolic link, then the mode of the symbolic link is changed.
	.It Dv AT_BENEATH			.It Dv AT_BENEATH
	Only allow to change permissions of a file which is beneath of			Only allow to change permissions of a file which is beneath of
	the starting directory.			the topping directory.
				See the description of the
				.Dv O_BENEATH
				flag in the
				.Xr open 2
				manual page.
	.El			.El
	.Pp			.Pp
	If			If
	.Fn fchmodat			.Fn fchmodat
	is passed the special value			is passed the special value
	.Dv AT_FDCWD			.Dv AT_FDCWD
	in the			in the
	.Fa fd			.Fa fd
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	The			The
	.Fa path			.Fa path
	argument is not an absolute path and			argument is not an absolute path and
	.Fa fd			.Fa fd
	is neither			is neither
	.Dv AT_FDCWD			.Dv AT_FDCWD
	nor a file descriptor associated with a directory.			nor a file descriptor associated with a directory.
	.It Bq Er ENOTCAPABLE			.It Bq Er ENOTCAPABLE
				.Fa path
				is an absolute path,
				or contained a ".." component leading to a
				directory outside of the directory hierarchy specified by
				.Fa fd ,
				and the process is in capability mode.
				.It Bq Er ENOTCAPABLE
	The			The
	.Dv AT_BENEATH			.Dv AT_BENEATH
	flag was specified but			flag was provided to
				.Fn fchmodat ,
				and the absolute
	.Fa path			.Fa path
	is not strictly relative to the starting directory.			does not have its tail fully contained under the topping directory,
	For example,			or the relative
	.Fa path			.Fa path
	is absolute or includes a ".." component that escapes the starting directory.			escapes it.
	.El			.El
	.Sh SEE ALSO			.Sh SEE ALSO
	.Xr chmod 1 ,			.Xr chmod 1 ,
	.Xr chflags 2 ,			.Xr chflags 2 ,
	.Xr chown 2 ,			.Xr chown 2 ,
	.Xr open 2 ,			.Xr open 2 ,
	.Xr stat 2 ,			.Xr stat 2 ,
	.Xr sticky 7			.Xr sticky 7
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