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cwfs: remove noauth and nonone commans from fileserver console

The noauth and nonone commands are only valid in config mode.
The problem is that some people assumed that issuing the
noauth command in the runtime fileserver console would be
persistent across reboots, which is not the case.

To avoid this confusion, we remove these commands from the
fileserver console.

To still give a way to disable authentication at runtime,
define a authdisabled flag that can be toggled at runtime.

--- a/sys/src/cmd/cwfs/9p2.c

+++ b/sys/src/cmd/cwfs/9p2.c

@@ -184,7 +184,7 @@

 	Filsys *fs;

 	int error;

-	if(noauth)

+	if(noauth || (cons.flags & authdisableflag) != 0)

 		return Eauthdisabled;

 	error = 0;

@@ -237,7 +237,7 @@

 	db = cons.flags & authdebugflag;

-	if(noauth){

+	if(noauth || (cons.flags & authdisableflag) != 0){

 		uid = strtouid(f->uname);

 		if(db)

 			fprint(2, "permission granted by noauth uid %s = %d\n",

--- a/sys/src/cmd/cwfs/all.h

+++ b/sys/src/cmd/cwfs/all.h

@@ -74,8 +74,10 @@

 ulong	errorflag;

 ulong	chatflag;

 ulong	authdebugflag;

+ulong	authdisableflag;

+

 int	noattach;		/* attach is disabled */

-int	noauth;			/* auth is disable */

+int	noauth;			/* auth is disabled */

 int	nonone;			/* attach as none disabled */

 int	noatime;		/* atime is disabled */

 int	noatimeset;		/* noatime was changed (reset after dump) */

--- a/sys/src/cmd/cwfs/con.c

+++ b/sys/src/cmd/cwfs/con.c

@@ -730,20 +730,6 @@

 }

 void

-cmd_noauth(int, char *[])

-{

-	noauth = !noauth;

-	print("auth %s\n", noauth ? "disabled" : "enabled");

-}

-

-void

-cmd_nonone(int, char *[])

-{

-	nonone = !nonone;

-	print("none %s\n", nonone ? "disabled" : "enabled");

-}

-

-void

 cmd_noattach(int, char *[])

 {

 	noattach = !noattach;

@@ -816,8 +802,6 @@

 	cmd_install("who", "[user ...] -- print attaches", cmd_who);

 	cmd_install("hangup", "chan -- clunk files", cmd_hangup);

 	cmd_install("printconf", "-- print configuration", cmd_printconf);

-	cmd_install("noauth", "-- toggle noauth flag", cmd_noauth);

-	cmd_install("nonone", "-- toggle nonone flag", cmd_nonone);

 	cmd_install("noattach", "-- toggle noattach flag", cmd_noattach);

 	cmd_install("files", "-- report on files structure", cmd_files);

@@ -825,6 +809,7 @@

 	errorflag = flag_install("error", "-- on errors");

 	whoflag = flag_install("allchans", "-- on who");

 	authdebugflag = flag_install("authdebug", "-- report authentications");

+	authdisableflag = flag_install("authdisable", "-- disable authentication");

 }

 int

-- 

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