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In the description of pattern-lists, clarify negated
matches by explicitly stating that a negated match will never yield a
positive result, and that at least one positive term in the pattern-list must
match. bz#1918

Upstream-ID: 652d2f9d993f158fc5f83cef4a95cd9d95ae6a14
This commit is contained in:
djm@openbsd.org 2017-10-18 02:49:44 +00:00 committed by Damien Miller
parent eb80e26a15
commit 05b69e9957
1 changed files with 15 additions and 2 deletions
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17
ssh_config.5
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@ -33,8 +33,8 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $OpenBSD: ssh_config.5,v 1.257 2017/10/05 12:56:50 jmc Exp $
.Dd $Mdocdate: October 5 2017 $
.\" $OpenBSD: ssh_config.5,v 1.258 2017/10/18 02:49:44 djm Exp $
.Dd $Mdocdate: October 18 2017 $
.Dt SSH_CONFIG 5
.Os
.Sh NAME
@ -1674,6 +1674,19 @@ pool,
the following entry (in authorized_keys) could be used:
.Pp
.Dl from=\&"!*.dialup.example.com,*.example.com\&"
.Pp
Note that a negated match will never produce a positive result by itself.
For example, attempting to match
.Qq host3
against the following pattern-list will fail:
.Pp
.Dl from=\&"!host1,!host2\&"
.Pp
The solution here is to include a term that will yield a positive match,
such as a wildcard:
.Pp
.Dl from=\&"!host1,!host2,*\&"
.Pp
.Sh TOKENS
Arguments to some keywords can make use of tokens,
which are expanded at runtime: