mount.cifs: deprecate the DOMAIN/username%password username syntax

mount.cifs has in the past allowed users to specify a username using
the above syntax, which would populate the domain and password fields
with the different pieces.

Unfortunately, there are cases where it is legit to have a '/' in a
username. krb5 SPNs generally contain a '/' and we have no clear way
to distinguish between the two.

I don't see any real value in keeping that syntax allowed. It's no
easier than specifying "pass=" and "domain=" on the command line. Ditto
for credential files.

Begin the transition away from that syntax by adding a warning message
that support for it will be removed in 5.9.

Signed-off-by: Jeff Layton <jlayton@samba.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/mount.cifs.8 b/mount.cifs.8
index f6a66bf..b2a0936 100644
--- a/mount.cifs.8
+++ b/mount.cifs.8
@@ -56,7 +56,9 @@ user=\fIarg\fR
 .RS 4
 specifies the username to connect as\&. If this is not given, then the environment variable
 \fIUSER\fR
-is used\&. This option can also take the form "user%password" or "workgroup/user" or "workgroup/user%password" to allow the password and workgroup to be specified as part of the username\&.
+is used\&.
+.PP
+Earlier versions of mount.cifs also allowed one to specify the username in a "user%password" or "workgroup/user" or "workgroup/user%password" to allow the password and workgroup to be specified as part of the username. Support for those alternate username formats is now deprecated and should no longer be used. Users should use the discrete "pass=" and "dom=" to specify the username.
 .if n \{\
 .sp
 .\}