code: 9ferno

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Fix that one spooky mk bug — mk: fix closing random fd from uninitialized stack variable (thanks BurnZeZ, mycroftiv)

--- a/utils/mk/Plan9.c

+++ b/utils/mk/Plan9.c

@@ -199,7 +199,8 @@

 			perror(shell);

 			_exits("exec");

 		}

-		close(out[1]);

+		if(buf)

+			close(out[1]);

 		close(in[0]);

 		p = cmd+strlen(cmd);

 		while(cmd < p){

--- a/utils/mk/Posix.c

+++ b/utils/mk/Posix.c

@@ -130,7 +130,8 @@

 			perror(shell);

 			_exits("exec");

 		}

-		close(out[1]);

+		if(buf)

+			close(out[1]);

 		close(in[0]);

 		if(DEBUG(D_EXEC))

 			fprint(1, "starting: %s\n", cmd);