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

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head/lib/libc/sys/unlink.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.
	.\"			.\"
	.\" @(#)unlink.2 8.1 (Berkeley) 6/4/93			.\" @(#)unlink.2 8.1 (Berkeley) 6/4/93
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd October 20, 2018			.Dd November 11, 2018
	.Dt UNLINK 2			.Dt UNLINK 2
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm unlink ,			.Nm unlink ,
	.Nm unlinkat			.Nm unlinkat
	.Nd remove directory entry			.Nd remove directory entry
	.Sh LIBRARY			.Sh LIBRARY
	.Lb libc			.Lb libc
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	.Bl -tag -width indent			.Bl -tag -width indent
	.It Dv AT_REMOVEDIR			.It Dv AT_REMOVEDIR
	Remove the directory entry specified by			Remove the directory entry specified by
	.Fa fd			.Fa fd
	and			and
	.Fa path			.Fa path
	as a directory, not a normal file.			as a directory, not a normal file.
	.It Dv AT_BENEATH			.It Dv AT_BENEATH
	Only unlink files and directories which are beneath of the starting			Only unlink files and directories which are beneath of the topping
	directory.			directory.
				See the description of the
				.Dv O_BENEATH
				flag in the
				.Xr open 2
				manual page.
	.El			.El
	.Pp			.Pp
	If			If
	.Fn unlinkat			.Fn unlinkat
	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 unlinkat ,
				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 chflags 2 ,			.Xr chflags 2 ,
	.Xr close 2 ,			.Xr close 2 ,
	.Xr link 2 ,			.Xr link 2 ,
	.Xr rmdir 2 ,			.Xr rmdir 2 ,
	.Xr symlink 7			.Xr symlink 7
	.Sh STANDARDS			.Sh STANDARDS
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