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kbdfs: disable console processing if /dev/kbd is open

--- a/sys/man/8/kbdfs

+++ b/sys/man/8/kbdfs

@@ -171,7 +171,11 @@

 .B Num

 will not change

 the characters already present in the string, but will

-take effect on newly pressed keys.

+take effect on newly pressed keys. Opening the

+.BR kbd

+file disables input processing on the

+.BR cons

+file until it is closed again.

 .PP

 Raw scancodes can be written to the

 .BR kbin

--- a/sys/src/cmd/aux/kbdfs.c

+++ b/sys/src/cmd/aux/kbdfs.c

@@ -605,7 +605,7 @@

 			break;

 		case Araw:

-			if(raw){

+			if(raw || kbdopen){

 				s = emalloc9p(UTFmax+1);

 				s[runetochar(s, &r)] = 0;

 			} else {

@@ -620,6 +620,11 @@

 			e = s + strlen(s);

 		Havereq:

+			if(kbdopen){

+				free(b);

+				b = nil;

+				break;

+			}

 			while(b && (req = qcons.h)){

 				if((qcons.h = req->aux) == nil)

 					qcons.t = &qcons.h;